US20120019942A1 - Light-Guide Solar Panel and Method of Fabrication Thereof - Google Patents
Light-Guide Solar Panel and Method of Fabrication Thereof Download PDFInfo
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- US20120019942A1 US20120019942A1 US13/028,957 US201113028957A US2012019942A1 US 20120019942 A1 US20120019942 A1 US 20120019942A1 US 201113028957 A US201113028957 A US 201113028957A US 2012019942 A1 US2012019942 A1 US 2012019942A1
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- concentrator
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Classifications
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
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- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S11/00—Non-electric lighting devices or systems using daylight
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0232—Optical elements or arrangements associated with the device
- H01L31/02327—Optical elements or arrangements associated with the device the optical elements being integrated or being directly associated to the device, e.g. back reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
- H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0075—Arrangements of multiple light guides
- G02B6/0078—Side-by-side arrangements, e.g. for large area displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
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Definitions
- the present invention relates generally to solar panels. More particularly, the present invention relates to light-guiding concentrator solar panels.
- PV cell material is expensive and solutions have been sought to reduce the amount of PV cell material required in solar panels.
- One of these solutions makes use of concentrating optical elements, such as lenses and mirrors, to concentrate sunlight on a smaller surface area occupied by a correspondingly smaller PV cell.
- the concentrating optical elements all have a non-zero focal length, they make for concentrated photovoltaic (CPV) modules that are typically bulkier than their non-concentrating counterparts. This bulkiness is disadvantageous not only in terms of the handling of the CPV modules, but also in terms of material costs. It is possible to obtain less bulky CPV modules while maintaining the same concentration factor by reducing the size of the PV cell; however, dicing PV cells into smaller cells increases the complexity and cost of the modules.
- present CPV modules typically require that the concentrating optical elements be secured in a complex structural enclosure to hold all the elements in place. This invariably adds to the weight and cost of the CPV modules, and makes for either stricter shipping requirements to mitigate risk of breakage of the assembled CPV modules or, requires that the CPV modules be shipped disassembled to their destination, thereby requiring assembly time and effort at the receiving destination.
- CPV module that is less bulky than existing CPV modules. It is also desirable to provide a CPV module that requires relatively less PV cell material than known CPV modules. Additionally, it is desirable to provide a CPV module that requires a less voluminous and complex structural enclosure for concentrating optical elements than in known CPV modules.
- the present invention provides a light-guide solar panel that comprises a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being formed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture.
- the panel further comprises an optical waveguide stage having an output surface, the optical waveguide stage being optically coupled to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface.
- the solar panel can have the optical elements spaced-apart from each other along substantially parallel lines and the output surface can be substantially non-orthogonal to the input surface.
- the solar panel can have the optical elements spaced-apart from each other along substantially concentric circle arcs, and the output surface can be shaped as a circle arc substantially concentric with the optical elements.
- the solar panel can have the optical elements include at least one of parabolic reflectors, cubic reflectors, hyperbolic reflectors, elliptical reflectors, flat reflectors, Cassegrain optics, Winston cone optics, round reflectors, lenses, a hologram and prismatic ridges.
- the solar panel can have the optical waveguide stage wedge-shaped.
- the solar panel can have the optical waveguide stage at least partially cone-shaped.
- the solar panel can have the optical waveguide stage include a first surface off of which the light received from the at least one optical output aperture goes through a first total internal reflection.
- the solar panel can have at least one of the input surface and the first surface with a cladding layer formed thereon.
- the solar panel can have the optical waveguide section with a plurality of reflector elements formed opposite the first surface, the plurality of reflector elements for receiving totally internally reflected light from the first surface and for reflecting the totally internally reflected light towards the first surface.
- the plurality of reflector elements can include planar reflectors.
- the planar reflectors can be substantially parallel to the first surface.
- At least one reflecting element can have total internal reflection surface.
- the at least one optical output aperture can be located in between adjacent reflector elements.
- the solar panel can be such that substantially no light is coupled from the optical waveguide stage to the light-insertion stage through the at least one optical output aperture.
- the solar panel can be such that the optical waveguide stage guides the light towards the output surface through a series of total internal reflections.
- the solar panel can be such that the input surface has a light input area and the output surface has a light collecting area, the light collecting area being smaller than the light input area.
- the solar panel can comprise a solar energy collector optically coupled to the output surface.
- the solar energy collector can include at least one of a photovoltaic solar cell and a heat collector.
- the solar panel of can further comprise an optical prism for optically coupling the output surface to the solar energy collector.
- the solar panel can be such that the optical waveguide stage has at least one parabolically-shaped interface adjacent the output surface, the at least one parabolically-shaped interface for concentrating the light on the output surface.
- the solar can comprise a tapered optical element adjacent the output surface, the tapered optical element for spacing the solar energy collector from the optical waveguide stage and for concentrating the light onto the solar energy collector.
- the tapered optical element can have a refractive index different than that of the optical waveguide stage.
- the solar panel can have the optical waveguide stage include a plurality of waveguides, each waveguide being optically coupled to one of the at least one optical output aperture, each waveguide for receiving the light from a corresponding optical output aperture and for propagating the light along the waveguide in a direction determined at least by the optical elements.
- Each waveguide can have a waveguide output surface, the waveguide stage output surface comprising the waveguide output surface of each waveguide.
- the optical elements can direct the light to propagate in only one direction along each waveguide or in two opposite directions along each waveguide.
- the optical elements can include a volume phase hologram.
- the optical elements can include a plurality of prismatic ridges.
- the solar panel can be such that the light-insertion stage can include a plurality of tapered light channels and the optical waveguide stage can include a plurality of waveguides, at least one of the tapered light channels being optically coupled to at least one waveguide through one of the at least one optical output aperture, each waveguide for guiding the light along the waveguide in a propagation direction determined at least by the optical elements.
- the at least one waveguide can include waveguides of different diameters.
- the optical elements can include at least one of a volume phase hologram and prismatic ridges for imparting the propagation direction to the light.
- the optical elements can further include at least one of parabolic reflectors, cubic reflectors, hyperbolic reflectors, elliptical reflectors, flat reflectors and round reflectors.
- the light-insertion stage can be formed in a first slab of optically transmissive material and the optical waveguide stage can be formed in a second slab of optically transmissive material.
- the first slab can include the input surface and the optical elements, and can have an output profiled surface opposite the input surface.
- the second slab can include an input profiled surface adjacent the output profiled surface, with the output profiled surface of the first slab and the input profiled surface of the second slab being complementary to each other and defining the at least one optical output aperture.
- the solar panel can be such that the light-insertion stage is formed in first and second layers of optically transmissive material, and the optical waveguide stage is formed in a third layer of optically transmissive material.
- the first layer can include the input surface and further include a first profiled surface opposite the input surface.
- the second layer can include a second profiled surface adjacent and complementary to the first profiled surface, with the second layer further including a third profiled surface opposite the second profiled surface.
- the third layer can include a fourth profiled surface adjacent and complementary to the third profiled surface, the third profiled surface and the fourth profiled surface defining the at least one optical output aperture.
- the solar panel can be such that the light-insertion stage and the optical waveguide stage are formed in a same optically transmissive material.
- the solar panel can be such that the light insertion stage has a first section having a first set of optical elements spaced-apart from each other along a first set of substantially concentric circle arcs and a second section having a second set of optical elements spaced-apart from each other along a second set of substantially concentric circle arcs.
- the first set of optical elements can direct a first portion of the light in a first direction and the second set of optical elements can direct a second portion of the light in a second direction distinct from the first direction.
- the second direction can be opposite the first direction.
- the first section of the light-insertion stage can have at least one first section optical output aperture and the second section of the light-insertion stage can have at least one second section optical output aperture, the optical waveguide stage having a first section optically coupled to the at least one first section optical aperture and a second section optically coupled to the at least one second section optical aperture.
- a light-guide solar panel that comprises a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being formed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture; an optical waveguide stage having an output surface, the optical waveguide stage being optically coupled to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface; and a photovoltaic cell optically coupled to the output surface.
- a method of fabricating a light-guide solar panel comprises steps of forming a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being disposed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture; forming an optical waveguide stage having an output surface; and optically coupling the optical waveguide stage to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface.
- FIG. 1 shows a first embodiment of the light-guide solar panel of the present invention
- FIG. 2 shows the embodiment of FIG. 1 with a plurality of light rays being focused by a single reflector
- FIG. 3 shows details of the embodiment of FIG. 1 ;
- FIG. 4 shows an enlarged view of the embodiment of FIG. 1 ;
- FIG. 5 shows the light-guide solar panel where light rays remain trap in an optical waveguide stage
- FIG. 6 shows a light-guide solar panel where light rays escape from the optical waveguide stages
- FIG. 7 shows a perspective view of a linear geometry embodiment of the light-guide solar panel of the present invention.
- FIG. 8A shows a side view of the embodiment of FIG. 7 with two light rays propagating therein;
- FIG. 8B shows a front view of the embodiment of FIG. 7 with two light rays propagating therein;
- FIG. 8C shows a perspective view of the embodiment of FIG. 7 with two light rays propagating therein;
- FIG. 9 shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention.
- FIG. 10 shows a perspective view of a rectangular section of the embodiment of FIG. 9 ;
- FIG. 11 shows a perspective view of an slice section of the embodiment of FIG. 9 ;
- FIG. 12 shows a portion of a two-layer light-guide solar panel embodiment of the present invention
- FIG. 13 shows a portion of an embodiment of the light-guide solar panel of the present invention where three reflections occur in the light-insertion stage
- FIG. 14 shows an embodiment of the light-guide solar panel of the present invention where Cassegrain optics are used in the light-guide stage
- FIG. 15 shows an embodiment of the light-guide solar panel of the present invention where Winston cone optics are used in the light-guide stage
- FIG. 16 shows an embodiment of the light-guide solar panel of the present invention where Winston cone optics are used in the optical waveguide stage;
- FIG. 17 shows an embodiment of the light-guide solar panel of the present invention where Winston half-cone optics are used in the optical waveguide stage;
- FIG. 18 shows an embodiment of the light-guide solar panel of the present invention where a flat-faceted concentrating element is used in the optical waveguide stage;
- FIG. 19 shows an embodiment of the light-guide solar panel of the present invention where multiple output surfaces are present on the optical waveguide stage
- FIG. 20 shows an embodiment of the light-guide solar panel of the present invention where a cladding layer surround the panel
- FIG. 21 shows an embodiment of the light-guide solar panel of the present invention made by assembling slices side by side
- FIG. 22A shows a perspective view of a three-layer embodiment of the light-guide solar panel of the present invention
- FIG. 22B shows an exploded view of the embodiment of FIG. 22A ;
- FIG. 22C shows a side view of the embodiment of FIG. 22A ;
- FIG. 22D shows an enlarged view of FIG. 22C ;
- FIG. 23A shows a perspective view of a two-layer embodiment of the light-guide solar panel of the present invention.
- FIG. 23B shows an exploded view of the embodiment of FIG. 23A ;
- FIG. 23C shows an enlarged view of the embodiment of FIG. 23A ;
- FIG. 24A shows an enlarged view of an embodiment of the light-guide panel of the present invention
- FIG. 24B shows an enlarged view of an embodiment of the light-guide panel of the present invention.
- FIG. 24C shows geometrical details of the embodiment of FIGS. 24B and 33D ;
- FIG. 25A shows a perspective view of a two-layer embodiment of the light-guide solar panel of the present invention
- FIG. 25B shows an exploded view of the embodiment of FIG. 25A ;
- FIG. 25C shows an enlarged view of the embodiment of FIG. 25A ;
- FIG. 26 shows an enlarged view of an embodiment of the light-guide panel of the present invention.
- FIG. 27 shows an assembly of ten light-guide solar panels embodiments of the present invention
- FIG. 28 shows a light-guide solar panel of the present invention assembled held between ribs
- FIG. 29 shows a heat sink
- FIG. 30 shows photovoltaic cell assembly
- FIG. 31 shows details of a single axis sun tracking mechanism
- FIG. 32A shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention
- FIG. 32B shows a top view of the embodiment of FIG. 32A ;
- FIG. 33A shows a prism
- FIG. 33B shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention with the prism of FIG. 33A ;
- FIG. 33C shows a top view of the embodiment of FIG. 33A ;
- FIG. 33D shows a perspective view of an assembly of light-guide solar panel sections
- FIG. 33E shows a side view of the assembly of FIG. 33D ;
- FIG. 33F shows an exploded view of the assembly of FIG. 33E ;
- FIG. 33G shows details of the light-insertion stage and the optical waveguide stage of the embodiment of FIG. 33D ;
- FIG. 34 shows a dual axis sun tracking mechanism
- FIG. 35 shows another dual axis sun tracking mechanism
- FIG. 36 shows yet another dual axis sun tracking mechanism
- FIG. 37 shows another embodiment of the light-guide solar panel of the present invention.
- FIG. 38 shows another embodiment of the light-guide solar panel of the present invention.
- FIG. 39 shows various embodiments of light-guide solar panels having different light acceptance angles
- FIG. 40 shows another embodiment of the light-guide solar panel of the present invention.
- FIG. 41A is a perspective view of another embodiment of the light-guide solar panel of the present invention.
- FIG. 41B is a detailed view of the embodiment of FIG. 41A ;
- FIG. 42A shows a hologram on a glass substrate
- FIG. 42B shows a detailed cross-sectional view of the embodiment of FIG. 41A ;
- FIG. 42C shows a perspective view of the detailed view of FIG. 42B ;
- FIG. 42D shows a side elevation view of the detailed view of FIG. 42B ;
- FIG. 43 shows a deflection layer made of prismatic ridges
- FIG. 44A shows a cross-sectional view of an element of an embodiment of the light-guide solar panel of the present invention
- FIG. 44B shows a top view of embodiment of FIG. 44A ;
- FIG. 44C shows a side view of the embodiment of FIG. 44A ;
- FIG. 45A shows a perspective view of a heat sink
- FIG. 45B shows a cross-sectional view of the heat sink of FIG. 45A ;
- FIG. 46 shows a solar panel single axis tracking assembly
- FIG. 47 shows a solar thermal single axis tracking assembly
- FIG. 48 shows a gradient index solar panel embodiment
- FIG. 49 shows another gradient index solar panel embodiment
- FIGS. 50A and 50B show assemblies of the solar panels shown at FIGS. 33D-33F .
- FIG. 51 shows an embodiment of a light-guide solar panel of the present invention
- FIG. 52 shows an embodiment of a two-layer solar tile of the present invention
- FIG. 53 shows an embodiment of a deflecting layer of the present invention
- FIG. 54 shows an exemplary embodiment of a structure effecting retardation of reflection
- FIG. 55 shows another embodiment of a deflecting layer of the present invention
- FIG. 56 shows an exemplary single ray trajectory through a deflecting and retarding layer of the present invention
- FIG. 57 shows how a pinch section of a light-guide solar panel can reduce an area over which light is collected
- FIG. 58 shows an embodiment of a deflecting layer of the present invention having a parabolic deflecting layer
- FIG. 59 shows a ray trace simulation for the deflecting layer of FIG. 17 ;
- FIG. 60 shows an embodiment of manual tilt panel of the present invention
- FIG. 61 shows another embodiment of a bi-directional deflector of the present invention.
- FIG. 62 shows an embodiment of a bi-directional deflector of the present invention
- FIG. 63 shows an embodiment of concentrator panel of the present invention, which uses lenses
- FIG. 64 shows an embodiment of a preconditioning layer above concentrating optics for the solar panel of the present invention
- FIG. 65 shows an embodiment of concentrating optics of the present invention
- FIG. 66 shows an embodiment of a structure of the present invention that achieves deflection of the light
- FIG. 67 shows an exemplary way of the present invention to manufacture deflecting layers
- FIG. 68 shows an exemplary way of the present invention to manufacture active tilting panels or deflecting layers
- FIG. 69 shows a twin solar tilting light-guide solar panel made of two tilting light-guide panels employing one set of bi-facial cells
- FIG. 70 shows another embodiment of the pinch optic
- FIG. 71 shows another embodiment of a tilting light-guide solar panel which is optimized to be surrounded by a cladding material
- FIG. 72 shows yet another embodiment of a tilting light-guide solar panel which is optimized to be surrounded by a cladding material.
- the present invention provides a solar energy system that uses a light-guide solar panel (LGSP) to trap light inside a dielectric or other transparent panel and propagates the light to one of the panel edges for harvesting by a solar energy collector (SEC).
- LGSP light-guide solar panel
- SEC solar energy collector
- This allows for very thin modules whose thickness is comparable to the height of the SEC, which can be, for example, a PV cell, at the edge of the module, thus eliminating the depth requirements inherent in traditional solar energy systems such as CPV systems.
- Light striking the LGSP is redirected and trapped internally so that it exits the panel through one of its edges where a SEC receives it.
- LGSPs of the present invention can be combined in clusters to make modules.
- the LGSP optics can be designed structurally to be largely self-supporting, meaning that they do not require any substantial external enclosure to maintain their shape and orientation. A full enclosure can be added to the LGSP.
- LGSP modules can be supported by an axle-and-rib configuration.
- Concentrated sunlight may be harnessed for a purpose other than creating electricity with (PV) cells.
- PV electricity with
- One alternate use is the heating of an element.
- the modules can also be configured to heat water while simultaneously generating electricity. It is also possible to couple the concentrated light into a fiber optic or other light-guide to propagate it to another location for some other use, such as to a lighting fixture to provide solar lighting.
- FIGS. 1 and 2 shows a cross-sectional view of a first embodiment of a LGSP 100 of the present invention.
- the panel 100 has a light-insertion stage 102 and an optical waveguide stage 104 , which can both be made of any suitable optically transmissive material.
- the light-insertion stage 102 receives sunlight 106 at its input surface 108 and from there, the sunlight 106 is guided towards optical elements such as, for example, a series of reflectors 110 .
- the reflectors 110 are defined by the interfaces 112 between the optically transmissive material of the light insertion stage 102 and the material making up areas 114 .
- the angle at which the interfaces 112 lie with respect to the impinging sunlight 106 and the ratio of the refractive index of the optically transmissive material of the light-insertion stage 102 to the refractive index of the material of areas 114 , are chosen such that the sunlight 106 impinging on the interfaces 112 goes through total internal reflection.
- the material 114 is air or any other suitable gas; however, any other suitable material can also make up the material 114 .
- the materials of the light-insertion stage 102 and of the optical waveguide stage 104 can include, for example, any type of polymer or acrylic glass such as poly(methyl-methacrylate) (PMMA), which has a refractive index of about 1.49 for the visible part of the optical spectrum. Any other suitable material can also be used.
- the angle at which the interfaces 112 lie with respect to the impinging sunlight 106 ranges from the critical angle to 90°, as measured from the surface normal of the interface 112 (e.g., for a PMMA-air interface, the angle is comprised substantially between about 42.5° and 90°).
- FIG. 2 shows the focusing of sunlight 106 by a same reflector 110 . The sunlight 106 so focused enters the optical waveguide stage 104 , which includes a wall 118 towards which the sunlight 106 propagates.
- the wall 118 has a first surface 120 between the optically transmissive material of the optical waveguide stage 104 and the material 122 , which lies on the other side of the wall 118 .
- the angle at which lies the interface 118 can lie with respect to the horizontal is in the range of 1-5°; however, any other suitable angle will also work.
- the orientation of the wall 118 with respect to the sunlight 106 coming from the apertures 116 , and the ratio of the refractive index of the optically transmissive material of the optical waveguide stage 104 to the refractive index of the material 122 are chosen such that the sunlight 106 impinging on the first surface 120 goes through total internal reflection.
- the material 122 can be air or any other suitable gas; however, any other material having a refractive index lower than that of the optical waveguide stage 104 can also make up the material 122 .
- the materials of the light-insertion stage 102 and of the optical waveguide stage 104 can include, for example, any type of polymer or acrylic glass such as PMMA. Any other suitable material can also be used.
- each reflecting element 124 is defined by an interface between the optically transmissive material of the optical waveguide stage 104 and the material making up area 128 , which can be the same material as that of areas 114 .
- the orientation of the reflecting elements 124 with respect to the sunlight 106 coming from the first surface 120 , and the ratio of the refractive index of the optically transmissive material of the optical waveguide stage 104 to the refractive index of the material 128 , are chosen such that the sunlight 106 impinging on reflecting elements 124 goes through total internal reflection.
- the function of the reflecting elements 124 , the first surface 120 and the reflectors 110 need not be based on total internal reflection and can include, for example, a suitable type of mirror.
- each reflecting element 124 is planar and lies at a non-parallel angle (e.g., 1-5°) to the input surface 108 . Additionally, each reflecting element 124 lies at a substantially same distance from the input surface 108 and is substantially parallel to the first surface 120 .
- the optical waveguide stage 104 as shown at FIGS. 1-3 , generally has the shape of a wedge, which acts to propagate the sunlight 106 being input in the optical waveguide stage 104 through the optical output apertures 116 in the direction where the wedge widens, which is referred to as the downstream direction.
- the optical waveguide stage 104 is such that after multiple successive total internal reflections at the first surface 120 and at the reflecting elements 124 , the sunlight 106 reaches an output surface 130 ( FIGS. 1 and 2 ), which is part of a sidewall 132 , where a SEC (not shown) of any suitable type can be disposed to harvest the energy carried by the sunlight 106 .
- FIGS. 1 and 2 show the sidewall 132 as being non-perpendicular to the input surface 108 ; however, the sidewall 132 can lie at any suitable angle from the input surface 108 . Further, as will be understood by the skilled worker, the LGSP 100 can have any suitable number of reflecting elements 124 and any suitable number of output optical apertures 116 .
- FIG. 3 shows that in the embodiment where the each reflecting element 124 is parallel to the wall 118 .
- the angle of incidence remains constant as a ray of sunlight 106 propagates in the downstream direction.
- FIG. 4 shows that the reflecting elements 124 can be formed such that sunlight 106 coming from the first surface 120 ( FIG. 1 ) and propagating towards the light-insertion stage 102 will be reflected off a reflecting element 124 and not impinge on an output optical aperture 116 .
- FIG. 5 shows another embodiment of the present invention where the angle between the wall 118 and the reflecting elements 124 is not parallel but opens in the downstream direction. In this embodiment, it can be shown that the sunlight 106 will remain trapped in the optical waveguide stage 104 .
- FIG. 6 shows an embodiment where the angle between the wall 118 and the reflecting elements closes in the downstream direction. In this embodiment, it can be shown that the sunlight 106 eventually transmits out of the optical waveguide stage 104 .
- FIG. 7 shows a perspective view of a LGSP 100 that can have the cross-section shown at FIG. 1 .
- the LGSP 100 of FIG. 7 concentrates the sunlight 106 on the sidewall 132 .
- the embodiment of the LGSP 100 of FIG. 7 can be referred to as having a linear geometry since the reflectors 110 all lie along parallel lines.
- the performance of the LGSP 100 of FIG. 7 is substantially invariant to changes in the angle of incidence of the sunlight 106 in the plane defined by the X and Y axes.
- This invariance is shown at FIGS. 8A-8C where rays 134 and 136 , respectively incident on the input surface 108 at 30° and 45° are directed to the optical waveguide stage 104 by the light-insertion stage 102 , and propagate downstream in the optical waveguide stage 104 towards the output surface 130 .
- the LGSP 100 of FIG. 7 can be used in conjunction with any suitable single axis sun tracker to effectively concentrate the sunlight 106 to an edge of the panel, i.e., to the output surface 130 .
- a single axis tracker keeps the panel in a constant alignment with the sun so as to maximize the amount of sunlight captured by the LGSP 100 .
- FIG. 9 shows a perspective view of another LGSP 100 that can have the cross-section shown at FIG. 1 .
- the LGSP 100 of FIG. 9 is substantially shaped as a discus 138 and concentrates the sunlight on an inner wall 140 formed in the hub region of the discus 138 , the inner wall 140 acting as an output surface 142 , which can be optically coupled, through any suitable way, to any suitable SEC. Examples of how the sunlight 106 can be coupled to a SEC are discussed further below.
- the embodiment of the LGSP 100 of FIG. 9 can be referred to as having a revolved geometry since the reflectors 110 lie on concentric circles.
- SECs include, for example, photovoltaic detectors, solar cells, fiber-optic collectors which gathers incident sunlight and transmits it by fiber-optics to the interior of a building for use in lighting fixtures and thermal collectors such as for heating water, or any combination thereof.
- the LGSP 100 of FIG. 9 can be sectioned off in rectangular panes, as shown at FIG. 10 , or in angular slices, as shown at FIG. 11 , or in any other suitable shape, in order to adapt to any desirable mounting bracket or structure (not shown).
- the LGSPs 100 shown at FIGS. 7-11 can be mounted to any suitable type of sun tracking systems such as, for example, single axis tracking systems and dual axis tracking systems.
- design tradeoffs can be made between concentration and angular sunlight acceptance, which in turn determine the required alignment and tracking precision.
- the LGSP 100 of FIG. 7 can achieve, for example, concentrations of 20-50 suns and require single axis solar tracking of approximately 1°.
- the LGSP 100 of FIG. 10 can achieve, for example, concentrations of approximately 500-1000 suns and require dual axis tracking of approximately 1°. Having a larger hub region at the center of the LGSP 100 of FIG. 10 , i.e., having a larger opening at center of the LGSP 100 , will produce less concentration than if the hub region were smaller and will require less accurate tracking.
- the ratio of the width of the optical output aperture 116 to the horizontal span of the reflector 110 determines the concentration. If the ratio is made very small, such that the optical output aperture 116 is extremely tight then the concentration can be made very high however the angular acceptance will be very small.
- the ratio between the width of 116 and the horizontal span of 110 also affects the angle of the first surface 120 , as a tighter aperture allows for the angle between the surfaces 118 and 108 to be smaller, such as, for example, 1°. This in turn can leads to a smaller sidewall 132 , and hence a smaller SEC.
- the light-insertion stage 102 and the optical waveguide stage 104 can form distinct layers as shown at FIG. 12 .
- the exit face 144 and the injection face 146 need not be parallel or flat.
- the exit face 144 and the injection face 146 are part of the optical output aperture 116 .
- FIG. 13 shows a cross-section of another embodiment of a LGSP of the present invention.
- the sunlight 106 bounces off a first reflector 148 , a second reflector 150 and a third reflector 152 before being input into the optical waveguide stage 104 at the output optical aperture 116 .
- the first, second and third reflectors are optical elements and can have any suitable shape such as, for example, flat, parabolic, hyperbolic, elliptical and round surfaces.
- any suitable optical elements such as, for example, lenses, Fresnel lenses, parabolic troughs, Cassegrain optics, Winston cones and tapered prisms can also be included in the light-insertion stage 102 .
- the optical elements need only be able to deliver the sunlight 106 to the optical output apertures 116 in the general downstream direction of the optical waveguide stage.
- the optical waveguide stage 104 can be independent of the embodiment of the light-insertion stage 102 , i.e., a same optical waveguide stage 104 can be used for different embodiments of the light-insertion stage 102 .
- FIG. 14 shows an embodiment of the light-insertion stage 102 having a Cassegrain optic design.
- a parabolic primary mirror 154 and a hyperbolic secondary mirror 156 are used to focus and direct the sunlight 106 at a flat reflector 158 .
- the sunlight 106 reflects off the reflector 158 and enters the optical waveguide stage 104 at the injection face 160 , which acts as an optical output aperture of the light-insertion stage 102 .
- the embodiment of FIG. 14 can be used in a linear or revolved geometry LGSP.
- the Cassegrain optics of FIG. 14 require mirrored surfaces on the primary and secondary mirrors ( 154 and 156 respectively), as well as on the flat reflector 158 .
- FIG. 15 shows a light-insertion stage 102 having a series of Winston cones 162 defined by the interfaces 164 A and 164 B that lie between the optically transmissive material of the light-insertion stage 102 and the material 166 , which can be air or any other suitable gas; however, any other suitable material can also make up the material 166 .
- the geometry of the interfaces 164 with respect to the impinging sunlight 106 and ratio of the refractive index of the optically transmissive material of the light-insertion stage 102 to that of the refractive index of the material 166 are chosen such that the sunlight 106 impinging on the interfaces 164 goes through total internal reflection.
- the sunlight 106 impinging on the interface 164 A is reflected towards a reflector 168 , which in turn directs the sunlight 106 at the optical output aperture 116 .
- the sunlight 106 impinging on the interface 164 B depending on where on the interface 164 B it reflects, it will either be reflected directly to the optical output aperture 116 or to the reflector 168 , which will reflect it towards the optical output aperture 116 .
- the sunlight 106 impinging directly on the reflector 168 it is also directed at the output optical aperture 116 .
- the sunlight 106 After having entered the optical waveguide stage 104 through the optical output aperture 116 , the sunlight 106 can either impinge on the first surface 120 or on the reflecting element 124 , either way, the sunlight 106 undergoes total internal reflection and is propagated in the downstream direction.
- the reflector 168 can have any suitable geometry such as, for example, a rounded geometry, and can include any suitable type of mirrored coating.
- the light-insertion stage 102 of FIG. 15 can be used in a linear or revolved geometry LGSP.
- the light-insertion layer 102 of FIG. 15 can be used in non-tracking solar panels due to its relatively wide sunlight acceptance angle.
- increased concentration can be obtained by reducing the height of the optical waveguide stage 104 adjacent the output optical aperture of the optical waveguide stage.
- the optical waveguide stage 104 propagates the sunlight 106 by total internal reflection of the sunlight.
- the sunlight will escape from the optical waveguide stage.
- this limitation does not apply to the last reflection within the optical waveguide stage since at this point, the sunlight is about to exit the optical waveguide stage 104 .
- the sunlight can be reflected at any suitable angle provided it still reaches the optical output aperture of the optical waveguide stage.
- the SEC will harvest the sunlight, the angle of incidence of the light matters less and, as such, the light can be pinched, or concentrated further, immediately prior to being harvested.
- the additional concentration achievable in this way depends upon the angular spread of the sunlight 106 within the optical waveguide stage 104 , with greater concentration being achievable the more collimated the light within the light guide layer is.
- the extra concentration can range, for example, between 1.5 times and 2 times.
- the simplest way to add this extra concentration is to taper the light-guide layer close to the SEC.
- a good taper for concentration is a Winston Cone, which is an off-axis paraboloid, an example of which is shown at reference numeral 170 at FIG. 16 .
- the inclusion of such a Winston cone 170 introduces dead space (defined as LGSP surface exposed to sunlight which does not capture and transmit light to the SEC) in the LGSP 100 because light incident on the Winston cone from above is substantially not captured.
- dead space defined as LGSP surface exposed to sunlight which does not capture and transmit light to the SEC
- a compromise between extra concentration and dead space can be achieved by using a half Winston Cone 172 shown at FIG. 17 .
- a flat faceted taper 174 as shown at FIG. 18 , can be used to approximate the effect of a Winston cone.
- the flat faceted taper does not provide the same additional concentration that can be provided by a Winston cone.
- the approach shown at FIG. 18 can be interesting.
- the increased concentration described above can be achieved using a separate optical element, a pinch, which is made of an optically transmissive material and can be secured between the optical waveguide stage and the SEC (not shown). Such a pinch is shown at reference numeral 176 at FIG. 18 . If the refractive index of the pinch 176 is greater than that of the optical waveguide stage, then further additional concentration can be gained. The additional concentration occurs because sunlight deflection occurs at the interface 180 between the optical waveguide stage and the pinch 176 , and because the critical angle with a high index material (pinch 176 ) is lower.
- An advantage of placing an optical element such as, for example, a pinch 176 , between the optical waveguide stage and the SEC is that it can insulate the optical waveguide stage against heat accumulation at the SEC. This becomes important if the SEC becomes hotter than what can be withstood by the material of which the optical waveguide stage is made during worst-case operation.
- FIG. 19 Another embodiment of the LGSP 100 of the present invention is shown at FIG. 19 .
- This embodiment allows the optical waveguide stage 104 to provide sunlight to a series of SECs secured to a series of walls 182 defined by the optical waveguide stage 104 .
- the use the plurality of walls 182 make for a thinner optical waveguide stage 104 .
- a cladding layer 184 shown at FIG. 20 , can be applied to the input surface and/or to first surface.
- the cladding layer can have a refractive index lower that the refractive index of the light-insertion stage and lower than that of the optical waveguide stage. Further, the cladding layer 184 can also be applied to all spaces within the LGSP 100 that is usually occupied by air or gas.
- the advantage of having such a cladding layer 184 is that it can protect the integrity of the LGSP. With such a cladding layer 184 present, the outer surface of the cladding may become dirty or scratched without compromising the function of the LGSP.
- the cladding layer 184 can be made of any suitable material such as, for example, fluorinated ethylene propylene. As will be understood by the skilled worker, the thickness of the cladding layer can relatively thin and still be effective.
- the LGSP embodiments presented above are scalable. That is, their dimensions can all change by a common factor without affecting the functioning of the optics, provided that the optics do not become so small that interference effects dominate. Such interference effects can become important when the spacing between staggered optical elements is on a scale comparable to the optical wavelengths.
- the most energetic wavelength portion of the solar spectrum is between 0.2 microns and 3 microns. Accordingly, the staggering period of the optical elements and the apertures as well as the size of the apertures can be kept larger than 3 microns to mitigate interference effects.
- the thickness of the optical waveguide stage will largely be limited by the size of the SECs (e.g., the size of PV cell strips) disposed to harvest the sunlight. In the case of PV cell strips, their size can vary, for example, from 1 millimeter to 1 centimeter, although larger or smaller PV cells would work equally well.
- the light-insertion stage (insertion layer) on the other hand can be made as thin as interference effects and fabrication methods can allow.
- the LGSPs of the present invention can be fabricated by molding techniques such as injection molding, compression molding, injection-compression molding or by any other suitable methods. Generally speaking, parts made by molding cannot have undercuts, and as such it is not possible to mold the entire light-guide panels described above at once using conventional molding. However, the LGSP can be manufactured by dividing them into sections that can be molded individually. Two exemplary approaches for sectioning a LGSP for purposes of manufacturing are described below.
- a first approach it to manufacture thin vertical sections, or slices, of the LGSP and assemble them side by side as shown at FIG. 21 .
- the separate slices 190 of the panel can be held together by an external bracing (not shown), or they can be glued or otherwise bonded together.
- This first approach (slice approach) is suitable for the linear geometry LGSPs.
- a second approach is to fabricate horizontal slabs that can be stacked one on top of the other to make a LGSP.
- Such panels can be self-supporting, requiring little in the way of framing and enclosures, and can be such that no gluing or bonding is necessary.
- the slabs make up the functional layers previously described (light-insertion stage and optical waveguide stage); however, a given functional layer can be made up of any number of slabs.
- FIGS. 22A-22D show one way to divide the LGSP 100 into three sheets with no undercuts.
- the top two sheets 192 and 194 act in concert to form the insertion layer (light-insertion stage 102 ), and the bottom sheet 196 forms the light-guide layer (optical waveguide stage 104 ).
- the embodiment shown at FIGS. 22A-22D is similar to that shown at FIG. 13 .
- the sunlight 106 reflects by total internal reflection (TIR) off a parabolic reflector, it then exits the top slab 192 and enters the middle slab 194 , then reflects by TIR off two flat facets before exiting the middle slab 194 and entering the bottom slab 196 , which acts as the light-guide layer (optical waveguide stage 104 ).
- TIR total internal reflection
- FIGS. 23A-23C show another potential division of the LGSP 100 into two slabs 198 and 200 .
- the insertion layer and the light-guide layer are made with one slab each, slabs 198 and 200 respectively.
- sunlight 106 totally internally reflects off a parabolic surface 202 and then exits through a flat facet (exit surface) 204 into the air before encountering an injection face 206 of the light-guide layer (optical waveguide stage). Deflection at the exit surface 204 of the insertion layer slab alters the focal point of the parabolic reflector; it moves the focal point slightly upstream, which in turn requires moving the apertures of the light guide layer upstream.
- FIG. 24B shows another embodiment of a light-guide solar panel similar to the one of FIG. 24A but instead with a cubic surface 203 abutting the projection 207 formed by the injection face 206 .
- FIG. 24C shows exemplary dimensions for the periodic unit of the light-insertion stage of FIG. 24B , the unit in question comprising the cubic reflector 203 , the flat facet 204 , the injection face 206 and the projection 207 .
- FIGS. 25A-25C shows yet another division of the LGSP 100 into two slabs 208 and 210 which improves on the limitation of the embodiment of FIG. 24A with respect to non-optimal single axis tracking, and allows for the fabrication of a linear geometry LGSP that does not use deflection to concentrate sunlight.
- sunlight 106 is totally internally reflected off the parabolic reflector 212 , but in this embodiment it exits the insertion layer slab at an exit face 214 that is the arc of a circle centered on the focus of the parabolic reflector 212 .
- the sunlight rays that are converging on the focus of the parabolic reflector each encounter the arc exit face at substantially a right angle, and so no deflection occurs.
- All the above-mentioned slabs can be molded with assembly features that ease the alignment between them when they are assembled into LGSPs.
- the assembly features can have minimal or no interference with the optical performance.
- embodiments of the LGSP of the present invention can be designed so that the backside of upstream apertures rests against the bottom of parabolic reflectors; this is the embodiment with the embodiment shown at FIG. 25C .
- Other assembly features can include small nubs, scattered over the surface of the light-guide layer, which hold the parabolic reflectors in place with respect to the optical waveguide stage 104 .
- the space between the slabs should be substantially clear of dust and moisture.
- the slabs can be sealed to each other using silicone or any other suitable material, or by using a gasket or any other suitable seal.
- a small amount of desiccant can be added between the slabs to absorb moisture.
- a dust jacket or full envelope can be added to the LGSP to keep it clean and allow for color matching with architecture.
- a single axis tracking solar panel system 216 is shown at FIG. 27 .
- the solar panel system 216 can use LGSPs 100 manufactured using the two-slab approach described above, and can be assembled to tilt about the axis 218 .
- the LGSPs 100 can be made in squares, 125 millimeters each side.
- the light-guide layer (light-insertion stage) can use a half Winston Cone to concentrate the light onto PV cells that are 3 mm tall. The optical concentration of such a system is roughly 30 suns.
- the system 216 is formed using several solar panels 100 , for example 10, arranged in two parallel rows on either side of a heat sink 220 , which can be made of aluminum or any other suitable material, and in such a way as to concentrate light towards the inner edge of the panels where they connect to the heat sink 220 .
- PV cells are placed between the optical panels 100 and the heat sink 220 .
- the solar panels 100 can be kept in alignment, for example, by ribs 222 shows at FIG. 28 .
- the ribs can be made of injection-molded polymer, although machined aluminum or any other material can be used.
- the ribs 222 mechanically hold the panels 100 in position against the heat sink 220 and features on both the ribs 222 and the heat sink 220 can be included to facilitate assembly. Such features (e.g., recess 224 ) and details of the rib 222 and heat sink 220 are shown at FIGS. 28 and 29 respectively.
- the ribs 222 can be held in place against the heat sink using mechanical fasteners, adhesives, or any other suitable means.
- This heat sink 220 can serve two functions: (1) it aids in dissipating heat from the PV cells and (2) it creates a rigid supporting axel for the LGSPs 100 .
- the weight of the panels is balanced on either side of the heat sink 220 and the heat sink 220 is where the panel connects to an external supporting frame.
- the heat sink 220 can have fins 226 made of a folded aluminum piece bonded between two extruded aluminum rails 228 .
- the fins are connected to the two rails and create vertical air channels 230 in heat sink 220 .
- the bond between the fins and the two rails can be made by brazing, epoxy, swaging or by any other means.
- This open heat-sink embodiment allows heat to be dissipated by natural convection as hot air can rise out of the heat-sink 220 and cooler air may enter into the heat-sink 220 from below.
- PV cells used in the system 216 can be of any size, such as 125 millimeters by 125 millimeters, and can be cut into strips of any height, for example, 3 mm tall for use with this embodiment.
- the PV cells can be encapsulated in any conventional way. For example, they can be soldered together in series and then encapsulated with ethylene vinyl acetate (EVA) or any other suitable material. Alternately, the electrical connections of the PV cells can be made by soldering, adhering or bonding the PV cells to a patterned circuit on a thermally conductive dielectric substrate. Insulated metal substrates (IMSs) such as those sold by The Bergquist Company of Chanhassen Minnesota would be appropriate.
- FIG. 30 shows an IMS substrate 232 soldered to a PV cell 234 ; the solder layer is shown at 235 .
- the IMS 232 can be connected to the aluminum heat sink 220 by epoxy or adhesive, or by any other suitable means.
- a typical IMS 232 has electrical patterning of copper on top of a polymer insulating layer which is bonded to an aluminum or copper base. It is possible to forgo the base and affix the electrically patterned polymer-insulating layer directly to the heat sink 220 . This process can be done in an oven by heat curing. An advantage of this approach is that it eliminates the base element and can reduce costs.
- the PV cell 234 can be bonded to the IMS 232 through a conductive ribbon or mesh that is connected to the entire length of the topside connector (not shown) of the PV cell 232 .
- the backside connector of the PV cell 232 can be bonded over its entire length and/or surface as well. For PV cells 232 that are long and narrow and fragile, using the connection method described above allow the PC cells to break in sections without losing their functionality or substantially affecting the power production.
- PV cells can be encapsulated to protect against moisture to avoid corrosion. This can be done using any suitable encapsulant such as, for example, ethylene vinyl acetate (EVA).
- EVA ethylene vinyl acetate
- EVA requires heat curing and so, the parts requiring sealing need to be placed in an oven.
- Another approach is to use an encapsulant, which cures in place at room temperature.
- Certain optically clear adhesives such as the silicone Sylgard184 by Dow Corning, can serve this purpose and can be poured in a thin layer on top of the PV cells after soldering.
- the panels can be fixed in place before the silicone has begun curing. This seals the space between the panels and the PV cells and creates an optical bond between them. The optical bond between the optical panels and the PV cells diminishes Fresnel losses at the exit edge of the optical panel.
- the LGSPs can be arranged on a mounting frame to form a solar power system.
- the heat sinks can connect with bearings on the mounting frame, which allows for free rotation of the panel about the axel made by the heat-sink 220 (see axis 218 at FIG. 27 ).
- the heat sink 220 can connect to the bearings by way of injection molded end caps ( 236 , FIG. 27 ), which are joined to the ends of the heat sink 220 .
- These end caps 236 can have any suitable features that allow connection to the bearings on the frame.
- the end caps 236 can be joined to the heat-sink either mechanically, with epoxies, adhesives, with adhesive tape, or through any other suitable means.
- the end caps 236 of the heat-sink 220 are also coupled to a mechanism that allows an actuator to control the rotation of the LGSPs 100 .
- a mechanism that allows an actuator to control the rotation of the LGSPs 100 For example, as shown at FIG. 31 , three bar linkages can connect all the modules to a single rail 238 that is driven by a linear actuator 240 .
- each LGSP can have a pinion gear which attaches to a rack, which is again driven by a linear actuator.
- a single linear actuator moving the single rail can drive the motion of all the panels, so that they will tilt in unison and maintain alignment.
- Full sunlight tracking solar panel system can be made using a LGSP having a revolved geometry and manufactured using the two-layer approach exemplified at FIGS. 23A-23C .
- the external appearance of the such full tracking systems can be similar to those described for the single axis tracking system above in that LGSPs can be arranged along either side of a central heat-sink and supported by ribs.
- the external dimensions of the panels can be 125 millimeters by 250 millimeters.
- Sunlight is concentrated to a line 242 at the center of the inner edge of the LGSP as shown at FIGS. 32A and 32B .
- Sunlight exits the solar panel 100 at a half cylindrical facet 244 and enters an air gap. While in principle a thin PV cell could be placed along the line 242 , such an arrangement would have limited angular acceptance.
- FIGS. 33A-33C show how a rectangular light-guide solar panel 800 can be made using two light-insertion stage sections 802 and 804 each having a revolved geometry and a corresponding optical waveguide stage section 806 and 808 .
- Sunlight impinging on the light-insertion stage 802 is coupled to the optical waveguide stage 806 , which propagates the sunlight to the surface 810 .
- As for sunlight impinging on the light-insertion stage 804 it is coupled to the optical waveguide stage 808 , which propagates the sunlight to the surface 812 .
- the surfaces 810 and 812 can be flat surfaces and any suitable SECs can be secured thereto. By not having to use a prism to couple the light exiting from the optical waveguide stages 806 and 808 , Fresnel reflections losses can be avoided.
- the optical waveguides 806 and 808 can have half-Winston cone profiles 816 and 818 such as shown at FIG. 33E .
- FIG. 33E FIG.
- FIG. 33F shows that the light-guide solar panel 800 can be made in a two-layer process by laying the light-insertion stages 802 and 804 over the optical waveguide stages 806 and 808 .
- FIG. 33G shows an exploded view of the assembly of FIG. 33E . Given that sunlight emerges from both sides of the optic, heat sinks can be placed on respective opposite sides of the panel. Because this panel of FIG. 33D does not have a coupling prism, the portion of the optical waveguide stages 806 and 808 that is adjacent the surface 810 and 812 can be made of an insulating material, which can withstand more heat, such as, for example, fused silica, while the remainder is made out of PMMA.
- LGSPs using a revolved geometry and designed for high solar concentration offer better performance when used in conjunction with full tracking of the sun, maintaining the sun's rays parallel to the normal vector of input surface of the solar panel to within +/ ⁇ 1°.
- the full tracking can be achieved several ways, but two methods in particular lend themselves to the system.
- the first full tracking method is shown at FIG. 34 where the LGSPs 100 are mounted in a frame 249 to tilt about a first series of axes 250 and the frame 249 can tilt about an axis 252 , which is substantially orthogonal to the axes 250 .
- the LGSP can roll east-west to track the sun's movement over the course of the day and the frame can tilt north-south to adapt to the seasonal variation of the sun.
- FIGS. 35 and 36 A second full tracking approach that allows to maintain a lower profile is shown at FIGS. 35 and 36 .
- the LGSPs 100 can be arranged in frames 254 or 256 and can tilt about the axes 258 and 260 respectively. Further, the frames 254 and 256 can be made to rotate about the axes 262 and 264 respectively.
- FIG. 37 shows a variant of the LGSP employing Winston cones in the insertion layer (light-insertion stage 102 ), as shown at FIG. 15 .
- the embodiment of FIG. 37 which is a linear geometry embodiment, is well suited for non-tracking applications because it has a wide angular acceptance because of the Winston cones.
- the LGSP 100 of FIG. 37 can be made in a two part stack, but rather than molding a solar panel for each PV cell strip, a cluster of panels can be molded, a cluster of optical panels being a grouping of a number of concentrator optics into fewer pieces.
- FIG. 38 shows how a cluster LGSP 268 can be made to accommodate four PV cells 266 .
- the slab 270 that forms light-guide layers can have grooves 272 molded into it to accommodate bifacial PV cells 266 .
- the PV cells 266 can be soldered and then encapsulated before being placed in the groove, or they can be only soldered together to form a circuit and then placed in the groove and encapsulated in place using a cast in place encapsulant such as clear silicone or any other optical epoxy.
- Attaching a number of cluster panels together makes for a full solar panel module.
- One method is to use an aluminum framing grill to tie all the panels together.
- Another method is to array and bond the optical panels by any suitable means onto a stiff superstrate of glass or of any other suitable material.
- the non-tracking LGSP 268 will generally not have 180° of angular acceptance in the cross sectional plane of the optics as seen at FIG. 37 .
- the cone of acceptance of the LGSP 268 can be +/ ⁇ 30° from the normal of the panel, which is sufficient to accommodate the seasonal variation of the sun's position in the sky.
- the non-tracking LGSP 168 should be installed at a tilt which matches the latitude of the installation location; this would ensure that the normal to the panel's input surface is parallel with the sun's rays at equinox.
- this does limit the installation configurations of the non-tracking LGSP 268 .
- the LGSP 268 can be designed with their cone of acceptance tilted off the normal as shown at FIG. 39 for northern hemisphere locations.
- a finite number of non-tracking LGSPs 268 series can be designed to accommodate any installation configuration.
- roll-to-roll continuous casting or embossing can be used to fabricate the light-insertion stage optics as films. It is possible to use roll-to-roll manufacturing methods because all of the above solar panels are composed of a stack of slabs that have no undercuts.
- the wedge-shaped light-guide layer optical waveguide stage
- the light-insertion stage can be applied to the optical waveguide stage using a lamination process or any other suitable process.
- FIG. 40 shows a LGSP 100 having a series of lenses 274 that focus and optically couples the sunlight 106 to the optical waveguide stage 104 .
- the LGSP 300 has an insertion layer (light-insertion stage 302 ) and a light-guide layer (optical waveguide stage 304 ).
- the light-insertion stage 302 has optical elements in the form of a deflector section 306 and reflector sections 312 .
- the deflector section 306 deflects impinging sunlight 106 in one or both of the directions indicated by the double-arrow 308 .
- the deflected sunlight is directed towards the optical elements that are the reflector sections 312 , which are shaped as a series of focusing tapered light channels.
- the tapered light channels are optically coupled, through a series of optical output apertures 313 to a series of waveguides 314 that form the optical waveguide stage 304 .
- the deflector section 306 can include an optical directing layer in the form of a Volume Phase Hologram (VPH). Fringes in the VPH hologram are formed in any suitable manner, using the interference between two coherent UV light sources. The fringe spacing and angle can be designed such that one or more modes of diffraction can fall within 45 degrees of the plane of the solar panel 300 .
- FIG. 42A shows an example of how such a VPH 309 operates. The resulting deflection is exemplified at FIGS. 42B to 42D .
- the deflector section 306 can also be made using non-interference optics, such as, for example, flat faceted optics like prisms. For instance, an array of 60° prisms arranged in an interlocking manner with a small air gap in between them would split light incident into the plane of the panel in two directions. This bi-directional deflection would lead to light accumulating on two opposite edges of the solar panel 300 . Such directing optics are shown at FIG. 43 .
- the optical waveguide stage 304 has a linear geometry and can have a plurality of waveguides 314 that receive light from their respective tapered light channels (reflector section 312 ) and that trap light by total internal reflection.
- the waveguides 314 act as delay lines whereby light enters from above, at optical output apertures 313 , travels for some distance and then exits out the top through the optical output apertures 313 .
- a potential channel embodiment is shown at FIGS. 42A-42C . Light entering a tapered light channel (reflector section 312 ) is reflected off a first parabolic section 316 , then off a flat face 318 and off a second parabolic section 320 before entering into a cylindrical section, which defines the waveguide 314 .
- the light can travel within the waveguide 314 in a spiral manner for some distance before escaping out.
- the length of the waveguide 314 is less than the mean travel distance of the trapped light rays, light coupled into the waveguide 314 will emerge concentrated from the end of the channel where it can be harvested by any suitable SEC.
- the optical waveguide stage 104 is 1 cm tall, and the waveguides 314 are 150 cm long then 75% of the light incident on the LGSP 300 will reach the two ends of the waveguide for harvesting by an SEC. If light is incident evenly on the LGSP 300 then light will be distributed evenly between the two ends of the waveguide channel.
- the LGSP 300 can include any number of waveguides 314 and tapered light channels 312 and each waveguide 314 can form a unit with a respective tapered light channel 312 .
- the units formed by the tapered light channel 312 and their respective waveguides 314 can be made by molding.
- each waveguide 314 has an output surface 315 , and the sum of the output surface 315 form the total output surface of the optical waveguide stage 304 .
- Any suitable SEC can be placed at the output of the plurality of optical output apertures 315 to harvest the sunlight 106 .
- FIGS. 44A-44C shows a tapered light channel 322 having a plurality of waveguides 326 formed thereon, with the diameter of the waveguide decreasing as the width of the tapered light channel decreases.
- the staggering of the waveguides vertically allows for two or more channels to be positioned closely side by side with little dead space in between them.
- the heat sink 220 previously described can be used in conjunction with single axis tracking systems and the full tracking high concentrator systems to shed excess heat from the SEC (e.g., PV cells) into the surrounding air. However, the excess heat can instead be used to heat water. This functionality can be accomplished with the heat sink 400 shown at FIGS. 45A and 45B .
- the heat sink 400 can be made of aluminum of any other suitable material.
- the heat sink 400 has one or more channels 402 for flowing water which extracts excess heat generated at the SECs.
- end caps 403 can be affixed to the heat sink 400 and serve the dual purpose of securing LGSPs to a mounting frame via bearings, and they also serve as inlet and outlets to a heat exchanger (not shown).
- Water could either flow straight through a heat sink 400 , with an inlet on one end cap and an outlet on the other, or it could flow in and out of the heat sink 400 through the same end-cap, with the opposite end cap serving as a u-bend.
- This embodiment can simplify hose routing between many modules in an extended system. The number of channels in the extrusion could be increased so as to have a larger surface area of contact between the water and the aluminum of the heat sink 400 .
- the rate of water flow through the heat sink 400 can be used to control the temperature of the SECs and be used to keep the LGSPs within their operating temperature range.
- a system using heat sinks 400 interconnected through hoses 406 is shown at FIG. 46 .
- a heat exchange fluid other than water can be used in the system of FIG. 46 .
- Sunlight captured by the LGSP of the present invention can be used in a solar thermal system that does not use PV cells.
- An example of such a solar thermal system 500 is shown at FIG. 47 .
- the system 500 can use a double walled tube 502 that has its outermost tube transparent.
- An insulating gas, such as argon, would separate the inner tube from the outer tube.
- the inner tube can be black so as to absorb incident sunlight.
- a heat absorbing liquid such as water, oil, or any other suitable liquid flows.
- the tube 502 is placed in the position previously occupied by heat sinks in the above-described embodiments.
- the concentrated sunlight passes through the clear outer tube, and the insulating gas layer, and is absorbed by the inner tube. This causes the liquid in the inner tube to heat.
- the fluid carrying tubes can remain fixed in position while the optics rotate about them.
- the LGSP of the present invention is relatively insensitive to thermal expansion or contraction. This is possible because all the optical components of the solar panels are made of similar, if not the same, materials. Because of this, they will expand by the same degree and the function of the optical element will not change significantly. Specifically, as the reflectors 110 expand, so too will the waveguide section 104 . This maintains the same focus for light 106 reflecting off 110 and focusing on 116 from FIG. 1 as the unit expands and contracts with changes in temperature.
- the panel is tilted to maintain alignment in one plane with incident sunlight. It is also possible to add an optical device on top of the optics that preconditions the light, altering the angle of the incident light to align the incident light to the optics. Such preconditioning optics could employ moving mirrors, prisms, or electro-optics.
- Tracking can be accomplished manually by occasionally tilting the single axis tracking panel, or the non-tracking panel.
- a manual-tracking panel would be one with a wide enough angular acceptance, say, for example, plus or minus 5 degrees in the cross-sectional plane, so that it would only need to be re-aligned slightly by hand every few weeks.
- Electronic alignment sensors could assist in the alignment, but actuators would not be needed.
- a LGSP using a different mechanism can be made using a panel with a gradient index of refraction.
- the refractive index gradient increases in the downstream direction of the LGSP, so that light incident on the panel would deflect towards the downstream direction. If the gradient was sufficient to cause enough deflection for TIR to occur at the bottom face of the panel then the light would be trapped and would become conducted down to the edge of the panel as shown at FIG. 48 .
- a mirror may be required for the first reflection if light exits the bottom face of the panel, and further deflection while traveling back up through the panel to the top surface would increase the angle of incidence on the top face enough for TIR to occur. This is shown at FIG. 49 .
- FIGS. 50A and 50B show how light-guide solar panels such as the light-guide solar panel 800 of FIG. 33D can be grouped together.
- the light-guide solar panels 800 can be placed between two vertically oriented aluminum heat sinks 900 to form a linear assembly 902 of light-guide solar panels 800 .
- Larger groups of light-guide solar panels 800 can be assembled by joining together the linear assemblies 902 .
- a light-guide solar panel gathers light from a large area and conducts it to the edge where it can be harvested.
- FIG. 52 there is shown a solar tile with two layer optics, details of each layer are shown.
- the layers are manufactured separately, but each has a 2D extruded structure. They are bonded together with their axes of extrusion perpendicular to each other.
- FIG. 53 the design details of the deflecting layer are shown. This is one of many potential designs, which can deflect light into the plane of the solar tile.
- FIG. 54 a structure that achieves retarding of reflection is shown. It is essentially a tapering channel lined with cylinders whose radius increases as the tapers radius decreases. The lower part of the taper has straight sides, so it is decreasing in cross section in a stepwise manner at each cylinder as shown in the detail provided of one channel.
- the cylinders between adjacent channels can be in physical contact, or in the case of extrusion they can be one element of two partial cylinders, however, cylinders on top of one another cannot be in physical contact, there must be a gap.
- the structure shown deflects light into the solar tile that is incident on the solar tile centered at angles of 45° ⁇ 27.5° to 45° ⁇ 27.5°.
- FIG. 56 there is shown a sketch of a single ray's trajectory through the deflecting and retarding layer.
- the pinch can further reduce the area over which light is collected, increasing the concentration factor.
- the pinch is a 3D trapezoid, and increases the concentration factor of the panels.
- the pinch shown increases the concentration factor by (1/0.7) 2 ⁇ 2, halving the amount of silicon required.
- FIG. 58 there is shown a parabolic deflecting layer which couples into a light-guide.
- FIG. 59 there is a shown a ray-trace through parabolic deflecting layer.
- FIG. 60 design details of the manual tilt panel are shown. Shown are thickness and length.
- the panel can be any width that is practical for construction because the tilting occurs in the plane show in the drawing.
- FIG. 61 a bi-directional deflector design using flat-faced elements is shown. Ray trace through one channel shown at bottom.
- FIG. 62 a bi-directional deflector design employing curved and straight elements is shown. Ray trace through one channel shown at bottom.
- FIG. 63 a lens and light-guide concentrator panel are shown.
- FIG. 64 a preconditioning layer above the concentrating optics of a light-guide solar panel is shown.
- FIG. 65 an alternate design for a pinch optic is shown.
- the pinch takes advantage of total internal reflection (TIR) from both the pinch to air and pinch to acrylic interfaces.
- TIR total internal reflection
- FIG. 66 an alternate design for a deflecting layer is shown. In this design, downstream deflecting elements are smaller than upstream elements allowing for better efficiency.
- FIG. 67 an alternate means of manufacturing the deflecting layer is shown. Rather than extrude the layer all at once, channels are extruded individually or in groups and then assembled as shown.
- FIG. 68 a shallow casting method for producing light guide solar panels is shown.
- FIG. 69 shows a twin tilting light guide panel.
- Bi-facial photo-voltaic cells produce electricity when light strikes either side of the cell.
- a single row of bi-facial cells can be shared between two normal tilting light-guide solar panels effectively making one tilting light-guide solar panel with twice the surface area and twice the electricity generated but with the same amount of PV material as a standard tilting light-guide solar panel.
- Two exemplary rays are shown being deflected by the parabolic deflectors and being conducted in the light-guide to either side of the bi-facial cell.
- Bi-facial cells would require a PV cell subassembly that had pinch optics on both sides.
- FIG. 70 another variant of the pinch optic is shown.
- This pinch optic relies on total internal reflection between the pinch optic material and the light-guide solar panel material. As such, it must be made from a higher index glass.
- This pinch optic can work with bi-facial cells in a twin arrangement, and can work with focussing elements positioned above the PV cell subassembly.
- FIG. 71 a design for a tilting light-guide solar panel with cladding is shown.
- Light strikes a parabolic deflector and then a flat facet before entering into the light-guide layer.
- Two exemplary rays are shown. All rays undergo two bounces before being captured by the light-guide layer, and at all times the angle of incidence is greater than the critical angle.
- FIG. 72 shows another design for a tilting light-guide solar panel with cladding.
- This panel uses parabolic deflectors which initially deflect light away from the solar cells. Light is then redirected by three bounces off flat facets before entering the light-guide layer.
- An advantage of this design is that there are few very thin sections of material.
- the present invention is that of a solar energy system that uses a LGSP to trap light inside a dielectric or other transparent panel and propagates the light to one of the panel edges for harvesting by a SEC.
- This allows for very thin modules whose thickness is comparable to the height of the SEC, for example a PV cell, at the edge of the module, thus eliminating the depth requirements inherent in traditional solar energy systems such as CPV systems.
- Light striking the LGSP is redirected and trapped internally so that it exits the panel through one of its edges where a SEC receives it.
- LGSPs can be combined in clusters to make modules.
- the LGSP optics can be designed structurally to be largely self-supporting, meaning that they do not require an external enclosure to maintain their shape and orientation. A full enclosure can be added to the embodiment.
- LGSP modules can be supported by a minimal axle-and-rib configuration.
- Concentrated sunlight may be harnessed for a purpose other than creating electricity with PV cells.
- One alternate use is the heating of an element.
- the modules can also be configured to heat water while simultaneously generating electricity. It is also possible to couple the concentrated light into a fiber optic or other light-guide to propagate it to another location for some other use, such as to a lighting fixture to provide solar lighting.
- the LGSP optics of the present invention can be used to reduce the thickness of optics in other applications including, for example, lamps and lighting.
Abstract
A solar energy concentration system that uses a light-guide solar panel (LGSP) to trap light inside a dielectric or other transparent panel and propagates the light to one of the panel edges for harvesting solar energy by a collector such as a photovoltaic cell. This allows for very thin modules whose thickness is comparable to the height of the solar energy collector. This eliminates the depth requirements inherent in traditional concentrated photovoltaic solar energy systems.
Description
- This application is a continuation of U.S. patent application Ser. No. 13/007,910, filed Jan. 17, 2011. Through the '910 Application, the present application is a continuation of U.S. patent application Ser. No. 12/113,705, filed May 1, 2008, now U.S. Pat. No. 7,873,257. Through the '705 Application, the present application claims the benefit of priority of U.S. Provisional Patent Application No. 60/915,207 filed May 1, 2007; U.S. Provisional Patent Application No. 60/942,745 filed Jun. 8, 2007; and U.S. Provisional Patent Application No. 60/951,775 filed Jul. 25, 2007. Each of the foregoing applications is incorporated herein by reference in their entirety.
- The present invention relates generally to solar panels. More particularly, the present invention relates to light-guiding concentrator solar panels.
- Solar panel assemblies having photovoltaic (PV) cells arrayed over a large surface area directly exposed to the sun are known. However, PV cell material is expensive and solutions have been sought to reduce the amount of PV cell material required in solar panels. One of these solutions makes use of concentrating optical elements, such as lenses and mirrors, to concentrate sunlight on a smaller surface area occupied by a correspondingly smaller PV cell. Given that the concentrating optical elements all have a non-zero focal length, they make for concentrated photovoltaic (CPV) modules that are typically bulkier than their non-concentrating counterparts. This bulkiness is disadvantageous not only in terms of the handling of the CPV modules, but also in terms of material costs. It is possible to obtain less bulky CPV modules while maintaining the same concentration factor by reducing the size of the PV cell; however, dicing PV cells into smaller cells increases the complexity and cost of the modules.
- Additionally, present CPV modules typically require that the concentrating optical elements be secured in a complex structural enclosure to hold all the elements in place. This invariably adds to the weight and cost of the CPV modules, and makes for either stricter shipping requirements to mitigate risk of breakage of the assembled CPV modules or, requires that the CPV modules be shipped disassembled to their destination, thereby requiring assembly time and effort at the receiving destination.
- Therefore, it is desirable therefore to provide a CPV module that is less bulky than existing CPV modules. It is also desirable to provide a CPV module that requires relatively less PV cell material than known CPV modules. Additionally, it is desirable to provide a CPV module that requires a less voluminous and complex structural enclosure for concentrating optical elements than in known CPV modules.
- It is an object of the present invention to obviate or mitigate at least one disadvantage of previous solar panels.
- In a first aspect, the present invention provides a light-guide solar panel that comprises a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being formed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture. The panel further comprises an optical waveguide stage having an output surface, the optical waveguide stage being optically coupled to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface.
- The solar panel can have the optical elements spaced-apart from each other along substantially parallel lines and the output surface can be substantially non-orthogonal to the input surface.
- The solar panel can have the optical elements spaced-apart from each other along substantially concentric circle arcs, and the output surface can be shaped as a circle arc substantially concentric with the optical elements.
- The solar panel can have the optical elements include at least one of parabolic reflectors, cubic reflectors, hyperbolic reflectors, elliptical reflectors, flat reflectors, Cassegrain optics, Winston cone optics, round reflectors, lenses, a hologram and prismatic ridges.
- The solar panel can have the optical waveguide stage wedge-shaped. The solar panel can have the optical waveguide stage at least partially cone-shaped.
- The solar panel can have the optical waveguide stage include a first surface off of which the light received from the at least one optical output aperture goes through a first total internal reflection. The solar panel can have at least one of the input surface and the first surface with a cladding layer formed thereon.
- The solar panel can have the optical waveguide section with a plurality of reflector elements formed opposite the first surface, the plurality of reflector elements for receiving totally internally reflected light from the first surface and for reflecting the totally internally reflected light towards the first surface. The plurality of reflector elements can include planar reflectors. The planar reflectors can be substantially parallel to the first surface. At least one reflecting element can have total internal reflection surface. The at least one optical output aperture can be located in between adjacent reflector elements.
- The solar panel can be such that substantially no light is coupled from the optical waveguide stage to the light-insertion stage through the at least one optical output aperture.
- The solar panel can be such that the optical waveguide stage guides the light towards the output surface through a series of total internal reflections. The solar panel can be such that the input surface has a light input area and the output surface has a light collecting area, the light collecting area being smaller than the light input area.
- The solar panel can comprise a solar energy collector optically coupled to the output surface. The solar energy collector can include at least one of a photovoltaic solar cell and a heat collector. The solar panel of can further comprise an optical prism for optically coupling the output surface to the solar energy collector.
- The solar panel can be such that the optical waveguide stage has at least one parabolically-shaped interface adjacent the output surface, the at least one parabolically-shaped interface for concentrating the light on the output surface. The solar can comprise a tapered optical element adjacent the output surface, the tapered optical element for spacing the solar energy collector from the optical waveguide stage and for concentrating the light onto the solar energy collector. The tapered optical element can have a refractive index different than that of the optical waveguide stage.
- The solar panel can have the optical waveguide stage include a plurality of waveguides, each waveguide being optically coupled to one of the at least one optical output aperture, each waveguide for receiving the light from a corresponding optical output aperture and for propagating the light along the waveguide in a direction determined at least by the optical elements. Each waveguide can have a waveguide output surface, the waveguide stage output surface comprising the waveguide output surface of each waveguide. The optical elements can direct the light to propagate in only one direction along each waveguide or in two opposite directions along each waveguide. The optical elements can include a volume phase hologram. The optical elements can include a plurality of prismatic ridges.
- The solar panel can be such that the light-insertion stage can include a plurality of tapered light channels and the optical waveguide stage can include a plurality of waveguides, at least one of the tapered light channels being optically coupled to at least one waveguide through one of the at least one optical output aperture, each waveguide for guiding the light along the waveguide in a propagation direction determined at least by the optical elements. The at least one waveguide can include waveguides of different diameters. The optical elements can include at least one of a volume phase hologram and prismatic ridges for imparting the propagation direction to the light. The optical elements can further include at least one of parabolic reflectors, cubic reflectors, hyperbolic reflectors, elliptical reflectors, flat reflectors and round reflectors.
- The light-insertion stage can be formed in a first slab of optically transmissive material and the optical waveguide stage can be formed in a second slab of optically transmissive material. The first slab can include the input surface and the optical elements, and can have an output profiled surface opposite the input surface. The second slab can include an input profiled surface adjacent the output profiled surface, with the output profiled surface of the first slab and the input profiled surface of the second slab being complementary to each other and defining the at least one optical output aperture.
- The solar panel can be such that the light-insertion stage is formed in first and second layers of optically transmissive material, and the optical waveguide stage is formed in a third layer of optically transmissive material. The first layer can include the input surface and further include a first profiled surface opposite the input surface. The second layer can include a second profiled surface adjacent and complementary to the first profiled surface, with the second layer further including a third profiled surface opposite the second profiled surface. The third layer can include a fourth profiled surface adjacent and complementary to the third profiled surface, the third profiled surface and the fourth profiled surface defining the at least one optical output aperture.
- The solar panel can be such that the light-insertion stage and the optical waveguide stage are formed in a same optically transmissive material.
- The solar panel can be such that the light insertion stage has a first section having a first set of optical elements spaced-apart from each other along a first set of substantially concentric circle arcs and a second section having a second set of optical elements spaced-apart from each other along a second set of substantially concentric circle arcs. The first set of optical elements can direct a first portion of the light in a first direction and the second set of optical elements can direct a second portion of the light in a second direction distinct from the first direction. The second direction can be opposite the first direction. The first section of the light-insertion stage can have at least one first section optical output aperture and the second section of the light-insertion stage can have at least one second section optical output aperture, the optical waveguide stage having a first section optically coupled to the at least one first section optical aperture and a second section optically coupled to the at least one second section optical aperture.
- In a further aspect, there is provided a light-guide solar panel that comprises a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being formed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture; an optical waveguide stage having an output surface, the optical waveguide stage being optically coupled to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface; and a photovoltaic cell optically coupled to the output surface.
- In yet a further aspect, there is provided a method of fabricating a light-guide solar panel. The method comprises steps of forming a light-insertion stage having an input surface for receiving light, optical elements and at least one optical output aperture, the optical elements being disposed between the input surface and the at least one optical output aperture to direct the light from the input surface to the at least one optical output aperture; forming an optical waveguide stage having an output surface; and optically coupling the optical waveguide stage to the at least one optical output aperture to receive the light therefrom, the optical waveguide stage for guiding the light towards the output surface.
- Other aspects and features of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying figures and upon reviewing these elements and these features as further covered in claims 1-56.
- Embodiments of the present invention will now be described, by way of example only, with reference to the attached Figures, wherein:
-
FIG. 1 shows a first embodiment of the light-guide solar panel of the present invention; -
FIG. 2 shows the embodiment ofFIG. 1 with a plurality of light rays being focused by a single reflector; -
FIG. 3 shows details of the embodiment ofFIG. 1 ; -
FIG. 4 shows an enlarged view of the embodiment ofFIG. 1 ; -
FIG. 5 shows the light-guide solar panel where light rays remain trap in an optical waveguide stage; -
FIG. 6 shows a light-guide solar panel where light rays escape from the optical waveguide stages; -
FIG. 7 shows a perspective view of a linear geometry embodiment of the light-guide solar panel of the present invention; -
FIG. 8A shows a side view of the embodiment ofFIG. 7 with two light rays propagating therein; -
FIG. 8B shows a front view of the embodiment ofFIG. 7 with two light rays propagating therein; -
FIG. 8C shows a perspective view of the embodiment ofFIG. 7 with two light rays propagating therein; -
FIG. 9 shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention; -
FIG. 10 shows a perspective view of a rectangular section of the embodiment ofFIG. 9 ; -
FIG. 11 shows a perspective view of an slice section of the embodiment ofFIG. 9 ; -
FIG. 12 shows a portion of a two-layer light-guide solar panel embodiment of the present invention; -
FIG. 13 shows a portion of an embodiment of the light-guide solar panel of the present invention where three reflections occur in the light-insertion stage; -
FIG. 14 shows an embodiment of the light-guide solar panel of the present invention where Cassegrain optics are used in the light-guide stage; -
FIG. 15 shows an embodiment of the light-guide solar panel of the present invention where Winston cone optics are used in the light-guide stage; -
FIG. 16 shows an embodiment of the light-guide solar panel of the present invention where Winston cone optics are used in the optical waveguide stage; -
FIG. 17 shows an embodiment of the light-guide solar panel of the present invention where Winston half-cone optics are used in the optical waveguide stage; -
FIG. 18 shows an embodiment of the light-guide solar panel of the present invention where a flat-faceted concentrating element is used in the optical waveguide stage; -
FIG. 19 shows an embodiment of the light-guide solar panel of the present invention where multiple output surfaces are present on the optical waveguide stage; -
FIG. 20 shows an embodiment of the light-guide solar panel of the present invention where a cladding layer surround the panel; -
FIG. 21 shows an embodiment of the light-guide solar panel of the present invention made by assembling slices side by side; -
FIG. 22A shows a perspective view of a three-layer embodiment of the light-guide solar panel of the present invention; -
FIG. 22B shows an exploded view of the embodiment ofFIG. 22A ; -
FIG. 22C shows a side view of the embodiment ofFIG. 22A ; -
FIG. 22D shows an enlarged view ofFIG. 22C ; -
FIG. 23A shows a perspective view of a two-layer embodiment of the light-guide solar panel of the present invention; -
FIG. 23B shows an exploded view of the embodiment ofFIG. 23A ; -
FIG. 23C shows an enlarged view of the embodiment ofFIG. 23A ; -
FIG. 24A shows an enlarged view of an embodiment of the light-guide panel of the present invention; -
FIG. 24B shows an enlarged view of an embodiment of the light-guide panel of the present invention; -
FIG. 24C shows geometrical details of the embodiment ofFIGS. 24B and 33D ; -
FIG. 25A shows a perspective view of a two-layer embodiment of the light-guide solar panel of the present invention; -
FIG. 25B shows an exploded view of the embodiment ofFIG. 25A ; -
FIG. 25C shows an enlarged view of the embodiment ofFIG. 25A ; -
FIG. 26 shows an enlarged view of an embodiment of the light-guide panel of the present invention; -
FIG. 27 shows an assembly of ten light-guide solar panels embodiments of the present invention; -
FIG. 28 shows a light-guide solar panel of the present invention assembled held between ribs; -
FIG. 29 shows a heat sink; -
FIG. 30 shows photovoltaic cell assembly; -
FIG. 31 shows details of a single axis sun tracking mechanism; -
FIG. 32A shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention; -
FIG. 32B shows a top view of the embodiment ofFIG. 32A ; -
FIG. 33A shows a prism; -
FIG. 33B shows a perspective view of a revolved geometry embodiment of the light-guide solar panel of the present invention with the prism ofFIG. 33A ; -
FIG. 33C shows a top view of the embodiment ofFIG. 33A ; -
FIG. 33D shows a perspective view of an assembly of light-guide solar panel sections; -
FIG. 33E shows a side view of the assembly ofFIG. 33D ; -
FIG. 33F shows an exploded view of the assembly ofFIG. 33E ; -
FIG. 33G shows details of the light-insertion stage and the optical waveguide stage of the embodiment ofFIG. 33D ; -
FIG. 34 shows a dual axis sun tracking mechanism; -
FIG. 35 shows another dual axis sun tracking mechanism; -
FIG. 36 shows yet another dual axis sun tracking mechanism; -
FIG. 37 shows another embodiment of the light-guide solar panel of the present invention; -
FIG. 38 shows another embodiment of the light-guide solar panel of the present invention; -
FIG. 39 shows various embodiments of light-guide solar panels having different light acceptance angles; -
FIG. 40 shows another embodiment of the light-guide solar panel of the present invention; -
FIG. 41A is a perspective view of another embodiment of the light-guide solar panel of the present invention; -
FIG. 41B is a detailed view of the embodiment ofFIG. 41A ; -
FIG. 42A shows a hologram on a glass substrate; -
FIG. 42B shows a detailed cross-sectional view of the embodiment ofFIG. 41A ; -
FIG. 42C shows a perspective view of the detailed view ofFIG. 42B ; -
FIG. 42D shows a side elevation view of the detailed view ofFIG. 42B ; -
FIG. 43 shows a deflection layer made of prismatic ridges; -
FIG. 44A shows a cross-sectional view of an element of an embodiment of the light-guide solar panel of the present invention; -
FIG. 44B shows a top view of embodiment ofFIG. 44A ; -
FIG. 44C shows a side view of the embodiment ofFIG. 44A ; -
FIG. 45A shows a perspective view of a heat sink; -
FIG. 45B shows a cross-sectional view of the heat sink ofFIG. 45A ; -
FIG. 46 shows a solar panel single axis tracking assembly; -
FIG. 47 shows a solar thermal single axis tracking assembly; -
FIG. 48 shows a gradient index solar panel embodiment; -
FIG. 49 shows another gradient index solar panel embodiment; -
FIGS. 50A and 50B show assemblies of the solar panels shown atFIGS. 33D-33F . -
FIG. 51 shows an embodiment of a light-guide solar panel of the present invention; -
FIG. 52 shows an embodiment of a two-layer solar tile of the present invention; -
FIG. 53 shows an embodiment of a deflecting layer of the present invention; -
FIG. 54 shows an exemplary embodiment of a structure effecting retardation of reflection; -
FIG. 55 shows another embodiment of a deflecting layer of the present invention; -
FIG. 56 shows an exemplary single ray trajectory through a deflecting and retarding layer of the present invention; -
FIG. 57 shows how a pinch section of a light-guide solar panel can reduce an area over which light is collected; -
FIG. 58 shows an embodiment of a deflecting layer of the present invention having a parabolic deflecting layer; -
FIG. 59 shows a ray trace simulation for the deflecting layer ofFIG. 17 ; -
FIG. 60 shows an embodiment of manual tilt panel of the present invention; -
FIG. 61 shows another embodiment of a bi-directional deflector of the present invention; -
FIG. 62 shows an embodiment of a bi-directional deflector of the present invention; -
FIG. 63 shows an embodiment of concentrator panel of the present invention, which uses lenses; -
FIG. 64 shows an embodiment of a preconditioning layer above concentrating optics for the solar panel of the present invention; -
FIG. 65 shows an embodiment of concentrating optics of the present invention; -
FIG. 66 shows an embodiment of a structure of the present invention that achieves deflection of the light; -
FIG. 67 shows an exemplary way of the present invention to manufacture deflecting layers; -
FIG. 68 shows an exemplary way of the present invention to manufacture active tilting panels or deflecting layers; -
FIG. 69 shows a twin solar tilting light-guide solar panel made of two tilting light-guide panels employing one set of bi-facial cells; -
FIG. 70 shows another embodiment of the pinch optic; -
FIG. 71 shows another embodiment of a tilting light-guide solar panel which is optimized to be surrounded by a cladding material; and -
FIG. 72 shows yet another embodiment of a tilting light-guide solar panel which is optimized to be surrounded by a cladding material. - Generally, the present invention provides a solar energy system that uses a light-guide solar panel (LGSP) to trap light inside a dielectric or other transparent panel and propagates the light to one of the panel edges for harvesting by a solar energy collector (SEC). This allows for very thin modules whose thickness is comparable to the height of the SEC, which can be, for example, a PV cell, at the edge of the module, thus eliminating the depth requirements inherent in traditional solar energy systems such as CPV systems. Light striking the LGSP is redirected and trapped internally so that it exits the panel through one of its edges where a SEC receives it.
- LGSPs of the present invention can be combined in clusters to make modules. The LGSP optics can be designed structurally to be largely self-supporting, meaning that they do not require any substantial external enclosure to maintain their shape and orientation. A full enclosure can be added to the LGSP. As will be described below, to minimize material use and cost, LGSP modules can be supported by an axle-and-rib configuration.
- Concentrated sunlight may be harnessed for a purpose other than creating electricity with (PV) cells. One alternate use is the heating of an element. The modules can also be configured to heat water while simultaneously generating electricity. It is also possible to couple the concentrated light into a fiber optic or other light-guide to propagate it to another location for some other use, such as to a lighting fixture to provide solar lighting.
-
FIGS. 1 and 2 shows a cross-sectional view of a first embodiment of aLGSP 100 of the present invention. Thepanel 100 has a light-insertion stage 102 and anoptical waveguide stage 104, which can both be made of any suitable optically transmissive material. The light-insertion stage 102 receivessunlight 106 at itsinput surface 108 and from there, thesunlight 106 is guided towards optical elements such as, for example, a series ofreflectors 110. Thereflectors 110 are defined by theinterfaces 112 between the optically transmissive material of thelight insertion stage 102 and the material making upareas 114. The angle at which theinterfaces 112 lie with respect to the impingingsunlight 106 and the ratio of the refractive index of the optically transmissive material of the light-insertion stage 102 to the refractive index of the material ofareas 114, are chosen such that thesunlight 106 impinging on theinterfaces 112 goes through total internal reflection. Typically, thematerial 114 is air or any other suitable gas; however, any other suitable material can also make up thematerial 114. The materials of the light-insertion stage 102 and of theoptical waveguide stage 104 can include, for example, any type of polymer or acrylic glass such as poly(methyl-methacrylate) (PMMA), which has a refractive index of about 1.49 for the visible part of the optical spectrum. Any other suitable material can also be used. The angle at which theinterfaces 112 lie with respect to the impingingsunlight 106 ranges from the critical angle to 90°, as measured from the surface normal of the interface 112 (e.g., for a PMMA-air interface, the angle is comprised substantially between about 42.5° and 90°). - The
reflectors 110 are shaped as parabolic reflectors; however, they can be of any other suitable shape. If the spacing between the reflectors is “A” and the origin of the system of coordinates is anaperture 116, then an exemplary equation of the corresponding parabola is y=(½A)x2−¼. As shown atFIG. 1 , eachreflector 110 directs thesunlight 106 toward a respective outputoptical aperture 116 by focusing thesunlight 106 at the outputoptical aperture 116.FIG. 2 shows the focusing ofsunlight 106 by asame reflector 110. Thesunlight 106 so focused enters theoptical waveguide stage 104, which includes awall 118 towards which thesunlight 106 propagates. Thewall 118 has afirst surface 120 between the optically transmissive material of theoptical waveguide stage 104 and thematerial 122, which lies on the other side of thewall 118. The angle at which lies theinterface 118 can lie with respect to the horizontal is in the range of 1-5°; however, any other suitable angle will also work. The orientation of thewall 118 with respect to thesunlight 106 coming from theapertures 116, and the ratio of the refractive index of the optically transmissive material of theoptical waveguide stage 104 to the refractive index of thematerial 122, are chosen such that thesunlight 106 impinging on thefirst surface 120 goes through total internal reflection. Thematerial 122 can be air or any other suitable gas; however, any other material having a refractive index lower than that of theoptical waveguide stage 104 can also make up thematerial 122. As for the materials of the light-insertion stage 102 and of theoptical waveguide stage 104, they can include, for example, any type of polymer or acrylic glass such as PMMA. Any other suitable material can also be used. - Once the
sunlight 106 is totally internally reflected at thefirst surface 120, it propagates in theoptical waveguide stage 104 towards as series of reflectingelements 124 that reflect thesunlight 106 towards thefirst surface 120 where thesunlight 106 once again goes through total internal reflection. As shown atFIG. 3 , each reflectingelement 124 is defined by an interface between the optically transmissive material of theoptical waveguide stage 104 and the material making uparea 128, which can be the same material as that ofareas 114. The orientation of the reflectingelements 124 with respect to thesunlight 106 coming from thefirst surface 120, and the ratio of the refractive index of the optically transmissive material of theoptical waveguide stage 104 to the refractive index of thematerial 128, are chosen such that thesunlight 106 impinging on reflectingelements 124 goes through total internal reflection. However, the function of the reflectingelements 124, thefirst surface 120 and thereflectors 110 need not be based on total internal reflection and can include, for example, a suitable type of mirror. - As shown in the exemplary embodiments of
FIGS. 1-3 , each reflectingelement 124 is planar and lies at a non-parallel angle (e.g., 1-5°) to theinput surface 108. Additionally, each reflectingelement 124 lies at a substantially same distance from theinput surface 108 and is substantially parallel to thefirst surface 120. As such, theoptical waveguide stage 104, as shown atFIGS. 1-3 , generally has the shape of a wedge, which acts to propagate thesunlight 106 being input in theoptical waveguide stage 104 through theoptical output apertures 116 in the direction where the wedge widens, which is referred to as the downstream direction. Therefore, theoptical waveguide stage 104 is such that after multiple successive total internal reflections at thefirst surface 120 and at the reflectingelements 124, thesunlight 106 reaches an output surface 130 (FIGS. 1 and 2 ), which is part of asidewall 132, where a SEC (not shown) of any suitable type can be disposed to harvest the energy carried by thesunlight 106. -
FIGS. 1 and 2 show thesidewall 132 as being non-perpendicular to theinput surface 108; however, thesidewall 132 can lie at any suitable angle from theinput surface 108. Further, as will be understood by the skilled worker, theLGSP 100 can have any suitable number of reflectingelements 124 and any suitable number of outputoptical apertures 116. -
FIG. 3 shows that in the embodiment where the each reflectingelement 124 is parallel to thewall 118. In this embodiment, the angle of incidence remains constant as a ray ofsunlight 106 propagates in the downstream direction. -
FIG. 4 shows that the reflectingelements 124 can be formed such thatsunlight 106 coming from the first surface 120 (FIG. 1 ) and propagating towards the light-insertion stage 102 will be reflected off a reflectingelement 124 and not impinge on an outputoptical aperture 116. -
FIG. 5 shows another embodiment of the present invention where the angle between thewall 118 and the reflectingelements 124 is not parallel but opens in the downstream direction. In this embodiment, it can be shown that thesunlight 106 will remain trapped in theoptical waveguide stage 104.FIG. 6 shows an embodiment where the angle between thewall 118 and the reflecting elements closes in the downstream direction. In this embodiment, it can be shown that thesunlight 106 eventually transmits out of theoptical waveguide stage 104. -
FIG. 7 shows a perspective view of aLGSP 100 that can have the cross-section shown atFIG. 1 . TheLGSP 100 ofFIG. 7 concentrates thesunlight 106 on thesidewall 132. The embodiment of theLGSP 100 ofFIG. 7 can be referred to as having a linear geometry since thereflectors 110 all lie along parallel lines. - The performance of the
LGSP 100 ofFIG. 7 is substantially invariant to changes in the angle of incidence of thesunlight 106 in the plane defined by the X and Y axes. This invariance is shown atFIGS. 8A-8C whererays input surface 108 at 30° and 45° are directed to theoptical waveguide stage 104 by the light-insertion stage 102, and propagate downstream in theoptical waveguide stage 104 towards theoutput surface 130. Because of this invariance to angle of incidence in the X-Y plane, theLGSP 100 ofFIG. 7 can be used in conjunction with any suitable single axis sun tracker to effectively concentrate thesunlight 106 to an edge of the panel, i.e., to theoutput surface 130. As will be understood by the skilled worker, a single axis tracker keeps the panel in a constant alignment with the sun so as to maximize the amount of sunlight captured by theLGSP 100. -
FIG. 9 shows a perspective view of anotherLGSP 100 that can have the cross-section shown atFIG. 1 . TheLGSP 100 ofFIG. 9 is substantially shaped as adiscus 138 and concentrates the sunlight on aninner wall 140 formed in the hub region of thediscus 138, theinner wall 140 acting as anoutput surface 142, which can be optically coupled, through any suitable way, to any suitable SEC. Examples of how thesunlight 106 can be coupled to a SEC are discussed further below. The embodiment of theLGSP 100 ofFIG. 9 can be referred to as having a revolved geometry since thereflectors 110 lie on concentric circles. SECs include, for example, photovoltaic detectors, solar cells, fiber-optic collectors which gathers incident sunlight and transmits it by fiber-optics to the interior of a building for use in lighting fixtures and thermal collectors such as for heating water, or any combination thereof. - The
LGSP 100 ofFIG. 9 can be sectioned off in rectangular panes, as shown atFIG. 10 , or in angular slices, as shown atFIG. 11 , or in any other suitable shape, in order to adapt to any desirable mounting bracket or structure (not shown). - As will be understood by the skilled worker, the
LGSPs 100 shown atFIGS. 7-11 can be mounted to any suitable type of sun tracking systems such as, for example, single axis tracking systems and dual axis tracking systems. For theLGSPs 100 ofFIGS. 7-11 , design tradeoffs can be made between concentration and angular sunlight acceptance, which in turn determine the required alignment and tracking precision. TheLGSP 100 ofFIG. 7 can achieve, for example, concentrations of 20-50 suns and require single axis solar tracking of approximately 1°. TheLGSP 100 ofFIG. 10 can achieve, for example, concentrations of approximately 500-1000 suns and require dual axis tracking of approximately 1°. Having a larger hub region at the center of theLGSP 100 ofFIG. 10 , i.e., having a larger opening at center of theLGSP 100, will produce less concentration than if the hub region were smaller and will require less accurate tracking. - As will be understood by the skilled worker, the ratio of the width of the
optical output aperture 116 to the horizontal span of thereflector 110 determines the concentration. If the ratio is made very small, such that theoptical output aperture 116 is extremely tight then the concentration can be made very high however the angular acceptance will be very small. The ratio between the width of 116 and the horizontal span of 110 also affects the angle of thefirst surface 120, as a tighter aperture allows for the angle between thesurfaces smaller sidewall 132, and hence a smaller SEC. - For fabrication purposes, the light-
insertion stage 102 and theoptical waveguide stage 104, for theLGSP 100 of, for example,FIGS. 7 and 10 , can form distinct layers as shown atFIG. 12 . This creates anexit face 144 in the light-insertion stage 102 and aninjection face 146 in theoptical waveguide stage 104. Theexit face 144 and theinjection face 146 need not be parallel or flat. Theexit face 144 and theinjection face 146 are part of theoptical output aperture 116. -
FIG. 13 shows a cross-section of another embodiment of a LGSP of the present invention. In the embodiment ofFIG. 13 , thesunlight 106 bounces off afirst reflector 148, asecond reflector 150 and athird reflector 152 before being input into theoptical waveguide stage 104 at the outputoptical aperture 116. The first, second and third reflectors are optical elements and can have any suitable shape such as, for example, flat, parabolic, hyperbolic, elliptical and round surfaces. - Further, any suitable optical elements such as, for example, lenses, Fresnel lenses, parabolic troughs, Cassegrain optics, Winston cones and tapered prisms can also be included in the light-
insertion stage 102. The optical elements need only be able to deliver thesunlight 106 to theoptical output apertures 116 in the general downstream direction of the optical waveguide stage. Theoptical waveguide stage 104 can be independent of the embodiment of the light-insertion stage 102, i.e., a sameoptical waveguide stage 104 can be used for different embodiments of the light-insertion stage 102. -
FIG. 14 shows an embodiment of the light-insertion stage 102 having a Cassegrain optic design. In this embodiment, a parabolicprimary mirror 154 and a hyperbolicsecondary mirror 156 are used to focus and direct thesunlight 106 at aflat reflector 158. Thesunlight 106 reflects off thereflector 158 and enters theoptical waveguide stage 104 at theinjection face 160, which acts as an optical output aperture of the light-insertion stage 102. The embodiment ofFIG. 14 can be used in a linear or revolved geometry LGSP. The Cassegrain optics ofFIG. 14 require mirrored surfaces on the primary and secondary mirrors (154 and 156 respectively), as well as on theflat reflector 158. -
FIG. 15 shows a light-insertion stage 102 having a series ofWinston cones 162 defined by theinterfaces insertion stage 102 and thematerial 166, which can be air or any other suitable gas; however, any other suitable material can also make up thematerial 166. The geometry of the interfaces 164 with respect to the impingingsunlight 106 and ratio of the refractive index of the optically transmissive material of the light-insertion stage 102 to that of the refractive index of thematerial 166, are chosen such that thesunlight 106 impinging on the interfaces 164 goes through total internal reflection. For a givencone 162 defined byinterfaces sunlight 106 impinging on theinterface 164A is reflected towards areflector 168, which in turn directs thesunlight 106 at theoptical output aperture 116. As for thesunlight 106 impinging on theinterface 164B, depending on where on theinterface 164B it reflects, it will either be reflected directly to theoptical output aperture 116 or to thereflector 168, which will reflect it towards theoptical output aperture 116. As for thesunlight 106 impinging directly on thereflector 168, it is also directed at the outputoptical aperture 116. After having entered theoptical waveguide stage 104 through theoptical output aperture 116, thesunlight 106 can either impinge on thefirst surface 120 or on the reflectingelement 124, either way, thesunlight 106 undergoes total internal reflection and is propagated in the downstream direction. Thereflector 168 can have any suitable geometry such as, for example, a rounded geometry, and can include any suitable type of mirrored coating. The light-insertion stage 102 ofFIG. 15 can be used in a linear or revolved geometry LGSP. The light-insertion layer 102 ofFIG. 15 can be used in non-tracking solar panels due to its relatively wide sunlight acceptance angle. - In the embodiments described above, increased concentration can be obtained by reducing the height of the
optical waveguide stage 104 adjacent the output optical aperture of the optical waveguide stage. As described in the embodiments above, theoptical waveguide stage 104 propagates thesunlight 106 by total internal reflection of the sunlight. In general, if the optical waveguide stage tapers or converges downstream as shown atFIG. 6 , the sunlight will escape from the optical waveguide stage. However, this limitation does not apply to the last reflection within the optical waveguide stage since at this point, the sunlight is about to exit theoptical waveguide stage 104. Immediately prior to harvesting of the sunlight by a SEC, the sunlight can be reflected at any suitable angle provided it still reaches the optical output aperture of the optical waveguide stage. Because the SEC will harvest the sunlight, the angle of incidence of the light matters less and, as such, the light can be pinched, or concentrated further, immediately prior to being harvested. The additional concentration achievable in this way depends upon the angular spread of thesunlight 106 within theoptical waveguide stage 104, with greater concentration being achievable the more collimated the light within the light guide layer is. In typical embodiments the extra concentration can range, for example, between 1.5 times and 2 times. - The simplest way to add this extra concentration is to taper the light-guide layer close to the SEC. A good taper for concentration is a Winston Cone, which is an off-axis paraboloid, an example of which is shown at
reference numeral 170 atFIG. 16 . However, the inclusion of such aWinston cone 170 introduces dead space (defined as LGSP surface exposed to sunlight which does not capture and transmit light to the SEC) in theLGSP 100 because light incident on the Winston cone from above is substantially not captured. Such dead space leads to reductions in overall system efficiency in the use of space for converting solar energy to useful energy. - A compromise between extra concentration and dead space can be achieved by using a
half Winston Cone 172 shown atFIG. 17 . As another alternative, a flatfaceted taper 174, as shown atFIG. 18 , can be used to approximate the effect of a Winston cone. However, the flat faceted taper does not provide the same additional concentration that can be provided by a Winston cone. Despite this fact, and because flat elements are easier to fabricate than curved elements, the approach shown atFIG. 18 can be interesting. - The increased concentration described above can be achieved using a separate optical element, a pinch, which is made of an optically transmissive material and can be secured between the optical waveguide stage and the SEC (not shown). Such a pinch is shown at
reference numeral 176 atFIG. 18 . If the refractive index of thepinch 176 is greater than that of the optical waveguide stage, then further additional concentration can be gained. The additional concentration occurs because sunlight deflection occurs at theinterface 180 between the optical waveguide stage and thepinch 176, and because the critical angle with a high index material (pinch 176) is lower. - An advantage of placing an optical element such as, for example, a
pinch 176, between the optical waveguide stage and the SEC is that it can insulate the optical waveguide stage against heat accumulation at the SEC. This becomes important if the SEC becomes hotter than what can be withstood by the material of which the optical waveguide stage is made during worst-case operation. - Another embodiment of the
LGSP 100 of the present invention is shown atFIG. 19 . This embodiment allows theoptical waveguide stage 104 to provide sunlight to a series of SECs secured to a series ofwalls 182 defined by theoptical waveguide stage 104. As will be understood by the skilled worker, the use the plurality ofwalls 182 make for a thinneroptical waveguide stage 104. - To protect the
input surface 108 of the light-insertion stage 102 and thefirst surface 120 of theoptical waveguide stage 104, acladding layer 184, shown atFIG. 20 , can be applied to the input surface and/or to first surface. The cladding layer can have a refractive index lower that the refractive index of the light-insertion stage and lower than that of the optical waveguide stage. Further, thecladding layer 184 can also be applied to all spaces within theLGSP 100 that is usually occupied by air or gas. - The advantage of having such a
cladding layer 184 is that it can protect the integrity of the LGSP. With such acladding layer 184 present, the outer surface of the cladding may become dirty or scratched without compromising the function of the LGSP. Thecladding layer 184 can be made of any suitable material such as, for example, fluorinated ethylene propylene. As will be understood by the skilled worker, the thickness of the cladding layer can relatively thin and still be effective. - The LGSP embodiments presented above are scalable. That is, their dimensions can all change by a common factor without affecting the functioning of the optics, provided that the optics do not become so small that interference effects dominate. Such interference effects can become important when the spacing between staggered optical elements is on a scale comparable to the optical wavelengths. The most energetic wavelength portion of the solar spectrum is between 0.2 microns and 3 microns. Accordingly, the staggering period of the optical elements and the apertures as well as the size of the apertures can be kept larger than 3 microns to mitigate interference effects.
- In order to use a minimum of material and keep costs low, it is desirable to make the optical elements small to minimize the thickness of LGSPs and to enable maximum area coverage with minimal material. The thickness of the optical waveguide stage (light-guide layer) will largely be limited by the size of the SECs (e.g., the size of PV cell strips) disposed to harvest the sunlight. In the case of PV cell strips, their size can vary, for example, from 1 millimeter to 1 centimeter, although larger or smaller PV cells would work equally well. The light-insertion stage (insertion layer) on the other hand can be made as thin as interference effects and fabrication methods can allow.
- The LGSPs of the present invention can be fabricated by molding techniques such as injection molding, compression molding, injection-compression molding or by any other suitable methods. Generally speaking, parts made by molding cannot have undercuts, and as such it is not possible to mold the entire light-guide panels described above at once using conventional molding. However, the LGSP can be manufactured by dividing them into sections that can be molded individually. Two exemplary approaches for sectioning a LGSP for purposes of manufacturing are described below.
- A first approach it to manufacture thin vertical sections, or slices, of the LGSP and assemble them side by side as shown at
FIG. 21 . Theseparate slices 190 of the panel can be held together by an external bracing (not shown), or they can be glued or otherwise bonded together. This first approach (slice approach) is suitable for the linear geometry LGSPs. - A second approach is to fabricate horizontal slabs that can be stacked one on top of the other to make a LGSP. Such panels can be self-supporting, requiring little in the way of framing and enclosures, and can be such that no gluing or bonding is necessary. The slabs make up the functional layers previously described (light-insertion stage and optical waveguide stage); however, a given functional layer can be made up of any number of slabs.
-
FIGS. 22A-22D show one way to divide theLGSP 100 into three sheets with no undercuts. The top twosheets bottom sheet 196 forms the light-guide layer (optical waveguide stage 104). The embodiment shown atFIGS. 22A-22D is similar to that shown atFIG. 13 . In thetop slab 192, thesunlight 106 reflects by total internal reflection (TIR) off a parabolic reflector, it then exits thetop slab 192 and enters themiddle slab 194, then reflects by TIR off two flat facets before exiting themiddle slab 194 and entering thebottom slab 196, which acts as the light-guide layer (optical waveguide stage 104). -
FIGS. 23A-23C show another potential division of theLGSP 100 into twoslabs slabs FIG. 24A ,sunlight 106 totally internally reflects off aparabolic surface 202 and then exits through a flat facet (exit surface) 204 into the air before encountering aninjection face 206 of the light-guide layer (optical waveguide stage). Deflection at theexit surface 204 of the insertion layer slab alters the focal point of the parabolic reflector; it moves the focal point slightly upstream, which in turn requires moving the apertures of the light guide layer upstream. There is an advantage to the slight shift of the focal point: it allows for tight packing of the parabolic reflector faces with very little dead-space between them. However, a disadvantage of using deflection rather than only reflection to concentrate the sunlight is that the resulting embodiment will not function optimally under single axis sunlight tracking. As such, the two-slab approach ofFIG. 24A is well-suited for a revolved geometry LGSP. This is because this embodiment requires, for optimal performance, two axis tracking in any event. The shift of the focus by a flat facet introduces some small astigmatism to the focusing parabolic optic. This spreads thesunlight 106 at the focus slightly and limits, to a small degree, the achievable concentration. It is possible to compensate somewhat for the astigmatism by tilting the parabola slightly. If theflat facet 204 is tilted 2° counter clockwise from the vertical, then tilting theparabolic reflector 110 by 5° clockwise from the vertical can somewhat compensate for the astigmatism.FIG. 24B shows another embodiment of a light-guide solar panel similar to the one ofFIG. 24A but instead with acubic surface 203 abutting theprojection 207 formed by theinjection face 206. -
FIG. 24C shows exemplary dimensions for the periodic unit of the light-insertion stage ofFIG. 24B , the unit in question comprising thecubic reflector 203, theflat facet 204, theinjection face 206 and theprojection 207. The lengths are in microns and the equation of thecubic reflector 203 is y=−1.049388x+9.1781775×10−4x2+1.19193×10−7x3. -
FIGS. 25A-25C shows yet another division of theLGSP 100 into twoslabs FIG. 24A with respect to non-optimal single axis tracking, and allows for the fabrication of a linear geometry LGSP that does not use deflection to concentrate sunlight. As shown atFIG. 26 ,sunlight 106 is totally internally reflected off theparabolic reflector 212, but in this embodiment it exits the insertion layer slab at anexit face 214 that is the arc of a circle centered on the focus of theparabolic reflector 212. The sunlight rays that are converging on the focus of the parabolic reflector each encounter the arc exit face at substantially a right angle, and so no deflection occurs. - All the above-mentioned slabs can be molded with assembly features that ease the alignment between them when they are assembled into LGSPs. The assembly features can have minimal or no interference with the optical performance. In particular, embodiments of the LGSP of the present invention can be designed so that the backside of upstream apertures rests against the bottom of parabolic reflectors; this is the embodiment with the embodiment shown at
FIG. 25C . Other assembly features can include small nubs, scattered over the surface of the light-guide layer, which hold the parabolic reflectors in place with respect to theoptical waveguide stage 104. The space between the slabs should be substantially clear of dust and moisture. The slabs can be sealed to each other using silicone or any other suitable material, or by using a gasket or any other suitable seal. A small amount of desiccant can be added between the slabs to absorb moisture. A dust jacket or full envelope can be added to the LGSP to keep it clean and allow for color matching with architecture. - A single axis tracking
solar panel system 216 is shown atFIG. 27 . Thesolar panel system 216 can useLGSPs 100 manufactured using the two-slab approach described above, and can be assembled to tilt about theaxis 218. TheLGSPs 100 can be made in squares, 125 millimeters each side. The light-guide layer (light-insertion stage) can use a half Winston Cone to concentrate the light onto PV cells that are 3 mm tall. The optical concentration of such a system is roughly 30 suns. - The
system 216 is formed using severalsolar panels 100, for example 10, arranged in two parallel rows on either side of aheat sink 220, which can be made of aluminum or any other suitable material, and in such a way as to concentrate light towards the inner edge of the panels where they connect to theheat sink 220. PV cells are placed between theoptical panels 100 and theheat sink 220. - The
solar panels 100 can be kept in alignment, for example, byribs 222 shows atFIG. 28 . The ribs can be made of injection-molded polymer, although machined aluminum or any other material can be used. Theribs 222 mechanically hold thepanels 100 in position against theheat sink 220 and features on both theribs 222 and theheat sink 220 can be included to facilitate assembly. Such features (e.g., recess 224) and details of therib 222 andheat sink 220 are shown atFIGS. 28 and 29 respectively. Theribs 222 can be held in place against the heat sink using mechanical fasteners, adhesives, or any other suitable means. - This
heat sink 220 can serve two functions: (1) it aids in dissipating heat from the PV cells and (2) it creates a rigid supporting axel for theLGSPs 100. The weight of the panels is balanced on either side of theheat sink 220 and theheat sink 220 is where the panel connects to an external supporting frame. To aid in dissipating heat, and as shown atFIG. 29 , theheat sink 220 can havefins 226 made of a folded aluminum piece bonded between two extruded aluminum rails 228. The fins are connected to the two rails and createvertical air channels 230 inheat sink 220. The bond between the fins and the two rails can be made by brazing, epoxy, swaging or by any other means. This open heat-sink embodiment allows heat to be dissipated by natural convection as hot air can rise out of the heat-sink 220 and cooler air may enter into the heat-sink 220 from below. - PV cells used in the
system 216 can be of any size, such as 125 millimeters by 125 millimeters, and can be cut into strips of any height, for example, 3 mm tall for use with this embodiment. The PV cells can be encapsulated in any conventional way. For example, they can be soldered together in series and then encapsulated with ethylene vinyl acetate (EVA) or any other suitable material. Alternately, the electrical connections of the PV cells can be made by soldering, adhering or bonding the PV cells to a patterned circuit on a thermally conductive dielectric substrate. Insulated metal substrates (IMSs) such as those sold by The Bergquist Company of Chanhassen Minnesota would be appropriate.FIG. 30 shows anIMS substrate 232 soldered to aPV cell 234; the solder layer is shown at 235. TheIMS 232 can be connected to thealuminum heat sink 220 by epoxy or adhesive, or by any other suitable means. - A
typical IMS 232 has electrical patterning of copper on top of a polymer insulating layer which is bonded to an aluminum or copper base. It is possible to forgo the base and affix the electrically patterned polymer-insulating layer directly to theheat sink 220. This process can be done in an oven by heat curing. An advantage of this approach is that it eliminates the base element and can reduce costs. ThePV cell 234 can be bonded to theIMS 232 through a conductive ribbon or mesh that is connected to the entire length of the topside connector (not shown) of thePV cell 232. The backside connector of thePV cell 232 can be bonded over its entire length and/or surface as well. ForPV cells 232 that are long and narrow and fragile, using the connection method described above allow the PC cells to break in sections without losing their functionality or substantially affecting the power production. - PV cells can be encapsulated to protect against moisture to avoid corrosion. This can be done using any suitable encapsulant such as, for example, ethylene vinyl acetate (EVA). However, EVA requires heat curing and so, the parts requiring sealing need to be placed in an oven. Another approach is to use an encapsulant, which cures in place at room temperature. Certain optically clear adhesives, such as the silicone Sylgard184 by Dow Corning, can serve this purpose and can be poured in a thin layer on top of the PV cells after soldering. As an added benefit, the panels can be fixed in place before the silicone has begun curing. This seals the space between the panels and the PV cells and creates an optical bond between them. The optical bond between the optical panels and the PV cells diminishes Fresnel losses at the exit edge of the optical panel.
- The LGSPs can be arranged on a mounting frame to form a solar power system. The heat sinks can connect with bearings on the mounting frame, which allows for free rotation of the panel about the axel made by the heat-sink 220 (see
axis 218 atFIG. 27 ). Theheat sink 220 can connect to the bearings by way of injection molded end caps (236,FIG. 27 ), which are joined to the ends of theheat sink 220. These end caps 236 can have any suitable features that allow connection to the bearings on the frame. The end caps 236 can be joined to the heat-sink either mechanically, with epoxies, adhesives, with adhesive tape, or through any other suitable means. The end caps 236 of the heat-sink 220 are also coupled to a mechanism that allows an actuator to control the rotation of theLGSPs 100. For example, as shown atFIG. 31 , three bar linkages can connect all the modules to asingle rail 238 that is driven by alinear actuator 240. Alternately, each LGSP can have a pinion gear which attaches to a rack, which is again driven by a linear actuator. With either system, a single linear actuator moving the single rail can drive the motion of all the panels, so that they will tilt in unison and maintain alignment. - Full sunlight tracking solar panel system can be made using a LGSP having a revolved geometry and manufactured using the two-layer approach exemplified at
FIGS. 23A-23C . The external appearance of the such full tracking systems can be similar to those described for the single axis tracking system above in that LGSPs can be arranged along either side of a central heat-sink and supported by ribs. - The external dimensions of the panels can be 125 millimeters by 250 millimeters. Sunlight is concentrated to a
line 242 at the center of the inner edge of the LGSP as shown atFIGS. 32A and 32B . Sunlight exits thesolar panel 100 at a halfcylindrical facet 244 and enters an air gap. While in principle a thin PV cell could be placed along theline 242, such an arrangement would have limited angular acceptance. - In practice, a wider angular acceptance is achieved by placing a 90°
roof prism 246 into the half cylindrical facet, as shown atFIGS. 33A-33C . Thisroof prism 246 can be made of glass or of any other suitable material, and can have an index of refraction greater than 1.4. High efficiency PV cells, such as triple-junction cells, can be bonded optically to the base 248 of the roof prism using a silicone encapsulant or another optical epoxy.FIGS. 33D-33G show how a rectangular light-guidesolar panel 800 can be made using two light-insertion stage sections waveguide stage section insertion stage 802 is coupled to theoptical waveguide stage 806, which propagates the sunlight to thesurface 810. As for sunlight impinging on the light-insertion stage 804, it is coupled to theoptical waveguide stage 808, which propagates the sunlight to thesurface 812. Thesurfaces optical waveguides FIG. 33E .FIG. 33F shows that the light-guidesolar panel 800 can be made in a two-layer process by laying the light-insertion stages FIG. 33G shows an exploded view of the assembly ofFIG. 33E . Given that sunlight emerges from both sides of the optic, heat sinks can be placed on respective opposite sides of the panel. Because this panel ofFIG. 33D does not have a coupling prism, the portion of the optical waveguide stages 806 and 808 that is adjacent thesurface - While the arrangement described above in relation to
FIGS. 33A-33C (with respect to sunlight exiting a halfcylindrical facet 244 and then being directed to the PV cell by a prism 246) does introduce Fresnel losses to the system, it also places a layer of gas, either air or any other suitable gas such as, e.g., argon, between theprism 246, which is directly touching the PV cell and the LGSP. The advantage of this arrangement is that it protects the optics (the LGSP) from heat that can accumulate on the PV cell. The PV cell can become extremely hot under high concentration, perhaps reaching 120° C. or higher, and this would adversely affect the optical panel if it were made out of PMMA. The layer of gas can insulate and protect the optical panel from heat accumulation on the PV cell. - As mentioned previously, LGSPs using a revolved geometry and designed for high solar concentration offer better performance when used in conjunction with full tracking of the sun, maintaining the sun's rays parallel to the normal vector of input surface of the solar panel to within +/−1°. The full tracking can be achieved several ways, but two methods in particular lend themselves to the system.
- The first full tracking method is shown at
FIG. 34 where theLGSPs 100 are mounted in aframe 249 to tilt about a first series ofaxes 250 and theframe 249 can tilt about anaxis 252, which is substantially orthogonal to theaxes 250. As such, the LGSP can roll east-west to track the sun's movement over the course of the day and the frame can tilt north-south to adapt to the seasonal variation of the sun. - A second full tracking approach that allows to maintain a lower profile is shown at
FIGS. 35 and 36 . TheLGSPs 100 can be arranged inframes axes frames axes -
FIG. 37 shows a variant of the LGSP employing Winston cones in the insertion layer (light-insertion stage 102), as shown atFIG. 15 . The embodiment ofFIG. 37 , which is a linear geometry embodiment, is well suited for non-tracking applications because it has a wide angular acceptance because of the Winston cones. In order to improve the concentration achievable, it is possible to employ abifacial PV cell 266 positioned between two optical panels; this embodiment doubles the concentration. - The
LGSP 100 ofFIG. 37 can be made in a two part stack, but rather than molding a solar panel for each PV cell strip, a cluster of panels can be molded, a cluster of optical panels being a grouping of a number of concentrator optics into fewer pieces.FIG. 38 shows how acluster LGSP 268 can be made to accommodate fourPV cells 266. - The
slab 270 that forms light-guide layers (optical waveguide stages 104) can havegrooves 272 molded into it to accommodatebifacial PV cells 266. ThePV cells 266 can be soldered and then encapsulated before being placed in the groove, or they can be only soldered together to form a circuit and then placed in the groove and encapsulated in place using a cast in place encapsulant such as clear silicone or any other optical epoxy. - Attaching a number of cluster panels together makes for a full solar panel module. Numerous methods exist for combining the LGSPs together. One method is to use an aluminum framing grill to tie all the panels together. Another method is to array and bond the optical panels by any suitable means onto a stiff superstrate of glass or of any other suitable material.
- The
non-tracking LGSP 268 will generally not have 180° of angular acceptance in the cross sectional plane of the optics as seen atFIG. 37 . The cone of acceptance of theLGSP 268 can be +/−30° from the normal of the panel, which is sufficient to accommodate the seasonal variation of the sun's position in the sky. As such, thenon-tracking LGSP 168 should be installed at a tilt which matches the latitude of the installation location; this would ensure that the normal to the panel's input surface is parallel with the sun's rays at equinox. However, this does limit the installation configurations of thenon-tracking LGSP 268. In fact, theLGSP 268 can be designed with their cone of acceptance tilted off the normal as shown atFIG. 39 for northern hemisphere locations. In practice, a finite number ofnon-tracking LGSPs 268 series can be designed to accommodate any installation configuration. - In order to make the LGSP of the present invention as cost efficient as possible, roll-to-roll continuous casting or embossing can be used to fabricate the light-insertion stage optics as films. It is possible to use roll-to-roll manufacturing methods because all of the above solar panels are composed of a stack of slabs that have no undercuts. The wedge-shaped light-guide layer (optical waveguide stage) can be made separately, and the light-insertion stage can be applied to the optical waveguide stage using a lamination process or any other suitable process.
- As will be understood by the skilled worker, the light-
insertion layer 102 of the LGSP of the present invention can also use any suitable type of lenses as optical elements instead of just the focusing TIR interfaces described above.FIG. 40 shows aLGSP 100 having a series oflenses 274 that focus and optically couples thesunlight 106 to theoptical waveguide stage 104. - Another embodiment of the LGSP of the present invention is shown at
FIGS. 41A , 41B, and 42A-42D. TheLGSP 300 has an insertion layer (light-insertion stage 302) and a light-guide layer (optical waveguide stage 304). The light-insertion stage 302 has optical elements in the form of adeflector section 306 andreflector sections 312. Thedeflector section 306 deflects impingingsunlight 106 in one or both of the directions indicated by the double-arrow 308. The deflected sunlight is directed towards the optical elements that are thereflector sections 312, which are shaped as a series of focusing tapered light channels. The tapered light channels are optically coupled, through a series ofoptical output apertures 313 to a series ofwaveguides 314 that form theoptical waveguide stage 304. - The
deflector section 306 can include an optical directing layer in the form of a Volume Phase Hologram (VPH). Fringes in the VPH hologram are formed in any suitable manner, using the interference between two coherent UV light sources. The fringe spacing and angle can be designed such that one or more modes of diffraction can fall within 45 degrees of the plane of thesolar panel 300.FIG. 42A shows an example of how such aVPH 309 operates. The resulting deflection is exemplified atFIGS. 42B to 42D . - The
deflector section 306 can also be made using non-interference optics, such as, for example, flat faceted optics like prisms. For instance, an array of 60° prisms arranged in an interlocking manner with a small air gap in between them would split light incident into the plane of the panel in two directions. This bi-directional deflection would lead to light accumulating on two opposite edges of thesolar panel 300. Such directing optics are shown atFIG. 43 . - The
optical waveguide stage 304 has a linear geometry and can have a plurality ofwaveguides 314 that receive light from their respective tapered light channels (reflector section 312) and that trap light by total internal reflection. Thewaveguides 314 act as delay lines whereby light enters from above, atoptical output apertures 313, travels for some distance and then exits out the top through theoptical output apertures 313. A potential channel embodiment is shown atFIGS. 42A-42C . Light entering a tapered light channel (reflector section 312) is reflected off a firstparabolic section 316, then off aflat face 318 and off a secondparabolic section 320 before entering into a cylindrical section, which defines thewaveguide 314. The light can travel within thewaveguide 314 in a spiral manner for some distance before escaping out. Provided that the length of thewaveguide 314 is less than the mean travel distance of the trapped light rays, light coupled into thewaveguide 314 will emerge concentrated from the end of the channel where it can be harvested by any suitable SEC. As an example, if theoptical waveguide stage 104 is 1 cm tall, and thewaveguides 314 are 150 cm long then 75% of the light incident on theLGSP 300 will reach the two ends of the waveguide for harvesting by an SEC. If light is incident evenly on theLGSP 300 then light will be distributed evenly between the two ends of the waveguide channel. - The
LGSP 300 can include any number ofwaveguides 314 and taperedlight channels 312 and eachwaveguide 314 can form a unit with a respective taperedlight channel 312. The units formed by the taperedlight channel 312 and theirrespective waveguides 314 can be made by molding. - In the
LGSP 300, eachwaveguide 314 has anoutput surface 315, and the sum of theoutput surface 315 form the total output surface of theoptical waveguide stage 304. Any suitable SEC can be placed at the output of the plurality ofoptical output apertures 315 to harvest thesunlight 106. - Other geometries of tapered light channels/waveguide can be used. For example,
FIGS. 44A-44C shows a taperedlight channel 322 having a plurality ofwaveguides 326 formed thereon, with the diameter of the waveguide decreasing as the width of the tapered light channel decreases. The staggering of the waveguides vertically allows for two or more channels to be positioned closely side by side with little dead space in between them. - The
heat sink 220 previously described can be used in conjunction with single axis tracking systems and the full tracking high concentrator systems to shed excess heat from the SEC (e.g., PV cells) into the surrounding air. However, the excess heat can instead be used to heat water. This functionality can be accomplished with theheat sink 400 shown atFIGS. 45A and 45B . Theheat sink 400 can be made of aluminum of any other suitable material. In contrast to theheat sink 220, which features fins to shed excess heat into the air, theheat sink 400 has one ormore channels 402 for flowing water which extracts excess heat generated at the SECs. - As seen at
FIG. 46 ,end caps 403 can be affixed to theheat sink 400 and serve the dual purpose of securing LGSPs to a mounting frame via bearings, and they also serve as inlet and outlets to a heat exchanger (not shown). Water could either flow straight through aheat sink 400, with an inlet on one end cap and an outlet on the other, or it could flow in and out of theheat sink 400 through the same end-cap, with the opposite end cap serving as a u-bend. This embodiment can simplify hose routing between many modules in an extended system. The number of channels in the extrusion could be increased so as to have a larger surface area of contact between the water and the aluminum of theheat sink 400. The rate of water flow through theheat sink 400 can be used to control the temperature of the SECs and be used to keep the LGSPs within their operating temperature range. A system usingheat sinks 400 interconnected throughhoses 406 is shown atFIG. 46 . As will be understood by the skilled worker, a heat exchange fluid other than water can be used in the system ofFIG. 46 . - Sunlight captured by the LGSP of the present invention can be used in a solar thermal system that does not use PV cells. An example of such a solar
thermal system 500 is shown atFIG. 47 . Thesystem 500 can use a doublewalled tube 502 that has its outermost tube transparent. An insulating gas, such as argon, would separate the inner tube from the outer tube. The inner tube can be black so as to absorb incident sunlight. Through the central tube a heat absorbing liquid, such as water, oil, or any other suitable liquid flows. - The
tube 502 is placed in the position previously occupied by heat sinks in the above-described embodiments. The concentrated sunlight, passes through the clear outer tube, and the insulating gas layer, and is absorbed by the inner tube. This causes the liquid in the inner tube to heat. The fluid carrying tubes can remain fixed in position while the optics rotate about them. - It is possible to fabricate some of small optical structures of the LGSP of the present invention using a technique known as silicone on glass. Thin clear silicone rubber, similar to the
Sylgard™ 184 by Dow, is formed into the necessary shapes on a glass substrate. It is also possible to mold silicone on its own with no glass substrate. - Advantageously, the LGSP of the present invention is relatively insensitive to thermal expansion or contraction. This is possible because all the optical components of the solar panels are made of similar, if not the same, materials. Because of this, they will expand by the same degree and the function of the optical element will not change significantly. Specifically, as the
reflectors 110 expand, so too will thewaveguide section 104. This maintains the same focus for light 106 reflecting off 110 and focusing on 116 fromFIG. 1 as the unit expands and contracts with changes in temperature. - For single axis tracking, the panel is tilted to maintain alignment in one plane with incident sunlight. It is also possible to add an optical device on top of the optics that preconditions the light, altering the angle of the incident light to align the incident light to the optics. Such preconditioning optics could employ moving mirrors, prisms, or electro-optics.
- Tracking can be accomplished manually by occasionally tilting the single axis tracking panel, or the non-tracking panel. A manual-tracking panel would be one with a wide enough angular acceptance, say, for example, plus or minus 5 degrees in the cross-sectional plane, so that it would only need to be re-aligned slightly by hand every few weeks. Electronic alignment sensors could assist in the alignment, but actuators would not be needed.
- A LGSP using a different mechanism can be made using a panel with a gradient index of refraction. The refractive index gradient increases in the downstream direction of the LGSP, so that light incident on the panel would deflect towards the downstream direction. If the gradient was sufficient to cause enough deflection for TIR to occur at the bottom face of the panel then the light would be trapped and would become conducted down to the edge of the panel as shown at
FIG. 48 . With less of a gradient, a mirror may be required for the first reflection if light exits the bottom face of the panel, and further deflection while traveling back up through the panel to the top surface would increase the angle of incidence on the top face enough for TIR to occur. This is shown atFIG. 49 . -
FIGS. 50A and 50B show how light-guide solar panels such as the light-guidesolar panel 800 ofFIG. 33D can be grouped together. The light-guidesolar panels 800 can be placed between two vertically orientedaluminum heat sinks 900 to form alinear assembly 902 of light-guidesolar panels 800. Larger groups of light-guidesolar panels 800 can be assembled by joining together thelinear assemblies 902. - In
FIG. 51 a light-guide solar panel gathers light from a large area and conducts it to the edge where it can be harvested. - In
FIG. 52 there is shown a solar tile with two layer optics, details of each layer are shown. The layers are manufactured separately, but each has a 2D extruded structure. They are bonded together with their axes of extrusion perpendicular to each other. - In
FIG. 53 the design details of the deflecting layer are shown. This is one of many potential designs, which can deflect light into the plane of the solar tile. - In
FIG. 54 a structure that achieves retarding of reflection is shown. It is essentially a tapering channel lined with cylinders whose radius increases as the tapers radius decreases. The lower part of the taper has straight sides, so it is decreasing in cross section in a stepwise manner at each cylinder as shown in the detail provided of one channel. The cylinders between adjacent channels can be in physical contact, or in the case of extrusion they can be one element of two partial cylinders, however, cylinders on top of one another cannot be in physical contact, there must be a gap. - In
FIG. 55 , the structure shown deflects light into the solar tile that is incident on the solar tile centered at angles of 45°−27.5° to 45°±27.5°. - In
FIG. 56 , there is shown a sketch of a single ray's trajectory through the deflecting and retarding layer. - In
FIG. 57 , it is shown that the pinch can further reduce the area over which light is collected, increasing the concentration factor. The pinch is a 3D trapezoid, and increases the concentration factor of the panels. The pinch shown increases the concentration factor by (1/0.7)2≈2, halving the amount of silicon required. - In
FIG. 58 , there is shown a parabolic deflecting layer which couples into a light-guide. - In
FIG. 59 , there is a shown a ray-trace through parabolic deflecting layer. - In
FIG. 60 design details of the manual tilt panel are shown. Shown are thickness and length. The panel can be any width that is practical for construction because the tilting occurs in the plane show in the drawing. - In
FIG. 61 a bi-directional deflector design using flat-faced elements is shown. Ray trace through one channel shown at bottom. - In
FIG. 62 a bi-directional deflector design employing curved and straight elements is shown. Ray trace through one channel shown at bottom. - In
FIG. 63 a lens and light-guide concentrator panel are shown. - In
FIG. 64 a preconditioning layer above the concentrating optics of a light-guide solar panel is shown. - In
FIG. 65 an alternate design for a pinch optic is shown. In this design, the pinch takes advantage of total internal reflection (TIR) from both the pinch to air and pinch to acrylic interfaces. - In
FIG. 66 an alternate design for a deflecting layer is shown. In this design, downstream deflecting elements are smaller than upstream elements allowing for better efficiency. - In
FIG. 67 an alternate means of manufacturing the deflecting layer is shown. Rather than extrude the layer all at once, channels are extruded individually or in groups and then assembled as shown. - In
FIG. 68 , a shallow casting method for producing light guide solar panels is shown. -
FIG. 69 shows a twin tilting light guide panel. Using bi-facial photo-voltaic cells it is possible to double the concentration factor of a system without using any more photo-voltaic material. Bi-facial cells produce electricity when light strikes either side of the cell. A single row of bi-facial cells can be shared between two normal tilting light-guide solar panels effectively making one tilting light-guide solar panel with twice the surface area and twice the electricity generated but with the same amount of PV material as a standard tilting light-guide solar panel. Two exemplary rays are shown being deflected by the parabolic deflectors and being conducted in the light-guide to either side of the bi-facial cell. Bi-facial cells would require a PV cell subassembly that had pinch optics on both sides. - In
FIG. 70 another variant of the pinch optic is shown. This pinch optic relies on total internal reflection between the pinch optic material and the light-guide solar panel material. As such, it must be made from a higher index glass. This pinch optic can work with bi-facial cells in a twin arrangement, and can work with focussing elements positioned above the PV cell subassembly. - In
FIG. 71 a design for a tilting light-guide solar panel with cladding is shown. Light strikes a parabolic deflector and then a flat facet before entering into the light-guide layer. Two exemplary rays are shown. All rays undergo two bounces before being captured by the light-guide layer, and at all times the angle of incidence is greater than the critical angle. -
FIG. 72 shows another design for a tilting light-guide solar panel with cladding. This panel uses parabolic deflectors which initially deflect light away from the solar cells. Light is then redirected by three bounces off flat facets before entering the light-guide layer. An advantage of this design is that there are few very thin sections of material. - The present invention is that of a solar energy system that uses a LGSP to trap light inside a dielectric or other transparent panel and propagates the light to one of the panel edges for harvesting by a SEC. This allows for very thin modules whose thickness is comparable to the height of the SEC, for example a PV cell, at the edge of the module, thus eliminating the depth requirements inherent in traditional solar energy systems such as CPV systems. Light striking the LGSP is redirected and trapped internally so that it exits the panel through one of its edges where a SEC receives it.
- LGSPs can be combined in clusters to make modules. The LGSP optics can be designed structurally to be largely self-supporting, meaning that they do not require an external enclosure to maintain their shape and orientation. A full enclosure can be added to the embodiment. As will be described below, to minimize material use and cost, LGSP modules can be supported by a minimal axle-and-rib configuration.
- Concentrated sunlight may be harnessed for a purpose other than creating electricity with PV cells. One alternate use is the heating of an element. The modules can also be configured to heat water while simultaneously generating electricity. It is also possible to couple the concentrated light into a fiber optic or other light-guide to propagate it to another location for some other use, such as to a lighting fixture to provide solar lighting. Furthermore, the LGSP optics of the present invention can be used to reduce the thickness of optics in other applications including, for example, lamps and lighting. Other aspects and uses of the present invention will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments of the invention in conjunction with the accompanying figures.
- In the preceding description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the embodiments of the invention. However, it will be apparent to one skilled in the art that these specific details are not required in order to practice the invention. In other instances, well-known electrical structures and circuits are shown in block diagram form in order not to obscure the invention. For example, specific details are not provided as to whether the embodiments of the invention described herein are implemented as a software routine, hardware circuit, firmware, or a combination thereof.
- The above-described embodiments of the invention are intended to be examples only. Alterations, modifications and variations can be effected to the particular embodiments by those of skill in the art without departing from the scope of the invention, which is defined solely by the claims appended hereto.
Claims (57)
1. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least one portion of each of the associated redirecting elements;
and the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation; and
a light receiver for receiving the light from the stepped waveguide.
2. The solar concentrator as defined in claim 1 wherein an end of the waveguide has an additional optical feature that redirects the light from the waveguide towards the receiver.
3. The solar concentrator as defined in claim 1 wherein the plurality of optical elements and the stepped waveguide are mirrored about a central axis to form at least two systems, such that the receivers from the at least two systems combine to form one contiguous receiver, and the solar concentrator comprises an increased width of at least about twice that of one system while retaining a same height.
4. The solar concentrator as defined in claim 1 wherein the concentrating elements and redirecting elements have a size selected from the group of about the same size and varying size.
5. The solar concentrator as defined in claim 1 wherein the stepped waveguide has upper and lower horizontal surfaces which are substantially parallel to the top collecting surface of the solar concentrator.
6. The solar concentrator as defined in claim 1 wherein the stepped waveguide has upper and lower horizontal surfaces which are disposed at an angle to the top collecting surface of the solar concentrator.
7. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least a portion of each of the associated redirecting elements;
and the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
8. The solar concentrator as defined in claim 7 wherein at least part of the associated redirecting element is physically discontinuously disposed apart from the concentrator element, thereby enabling separate manufacture of the concentrator element from at least one part of the associated redirecting element.
9. The solar concentrator as defined in claim 8 wherein the plurality of optical elements and the stepped waveguide are disposed in a vertical stack of physically separate components, thereby enabling direct assembly of separate parts comprising the solar concentrator.
10. The solar concentrator as defined in claim 7 wherein the at least one portion of the associated redirecting element comprises an entry element into the stepped waveguide.
11. The solar concentrator as defined in claim 7 wherein at least a portion of the associated redirecting element is separate from the stepped waveguide.
12. The solar concentrator as defined in claim 7 wherein the stepped waveguide is comprised of incremental stepped sections, the step height being about the height of the concentrated light being input into the stepped waveguide at that section.
13. The solar concentrator as defined in claim 7 wherein the stepped waveguide has upper and lower horizontal surfaces which are substantially parallel.
14. The solar concentrator as defined in claim 7 wherein the plurality of optical elements input light to the stepped waveguide to provide aggregated light and the concentrator further includes a receiver which collects the aggregated light.
15. The solar concentrator as defined in claim 7 wherein the concentrator element is selected from the group consisting of a spherical lens, a parabolic surface, an elliptical surface, a hyperbolic surface, an arc and a tailored shape reflective surface.
16. The solar concentrator as defined in claim 7 wherein the associated redirecting element is selected from the group of a flat reflective surface, a parabolic surface, an elliptical surface, a hyperbolic surface, an arc and a refractive component selected from the group of a spherical component, an aspherical component, a Fresnel lens and a tailored shape.
17. The solar concentrator as defined in claim 7 wherein the concentrator element comprises a refracting lens element such that the light achieves total internal reflection by the redirecting element.
18. The solar concentrator as defined in claim 7 where the solar concentrator is linearly symmetric.
19. The solar concentrator as defined in claim 7 where the solar concentrator is rotationally symmetric.
20. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a refractive concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least a portion of each of the associated redirecting elements; and
the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
21. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) a redirecting element comprised of
(1) a first redirecting element portion receiving repositioned light from the concentrator and having a discontinuous spatial surface and disposed substantially opposed to the concentrator element; and the first redirecting element further repositioning the light; and
(2) a second redirecting element portion that receives the repositioned light from the first redirecting element and further repositions the light, wherein the redirecting element includes a contiguous connection between at least a portion of each of the adjacent redirecting elements with the light avoiding repositioning within the contiguous connection;
and the solar concentrator further including: a stepped waveguide physically separated from the concentrator element and the waveguide for receiving the repositioned light from the second redirecting element portion, thereby enabling vertical stacking of separately manufactured parts of the solar concentrator.
22. The solar concentrator as defined in claim 21 wherein the second redirecting element comprises an entry element into the waveguide.
23. The solar concentrator as defined in claim 21 wherein the waveguide is comprised of incremental stepped sections, the step height being about the height of the concentrated light being input into the waveguide at an input section.
24. The solar concentrator as defined in claim 21 wherein the concentrator element of each of the plurality of optical elements is separated from the second redirecting element by a layer within which the repositioned light does not undergo a change of direction.
25. The solar concentrator as defined in claim 21 wherein a lower surface of the concentrator element and the first redirecting element and an upper surface of the waveguide are substantially parallel to each other.
26. The solar concentrator as defined in claim 21 wherein the plurality of optical elements and the waveguide are disposed in a vertical stack of physically separate components, thereby enabling direct assembly of separate parts comprising the solar concentrator.
27. The solar concentrator as defined in claim 21 wherein the concentrating element of each of the plurality of optical elements is separated from at least part of the redirecting element by a vertical layer within which the light does not undergo a repositioning charge of direction.
28. The solar concentrator as defined in claim 21 wherein the plurality of optical elements provide aggregated light to the waveguide and the concentrator further includes a receiver which collects the aggregated light.
29. The solar concentrator as defined in claim 21 wherein the redirecting element is selected from the group of a flat reflective surface, a parabolic surface, an arc and a tailored shape.
30. A solar concentrator comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including a concentrating element comprised of a combination of
(1) a surface between a high index material and a low index material enabling refraction of input light and
(2) a parabolic reflective surface which repositions the input light with the combination outputting the light without the light being repositioned more than once by the parabolic reflective surface;
a waveguide comprised of a plurality of portions with each of the portions associated with a corresponding one of the concentrating elements, each of the waveguide portion further having a step feature associated with receiving the output light from the concentrating element and the waveguide including top and bottom walls which are substantially parallel to each other, thereby preserving concentration of the light for delivery to a receiver.
31. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including a concentrator element for collecting and repositioning input light; and
the solar concentrator further including: a stepped waveguide comprised of a plurality of portions with each of the portions associated with a corresponding one of the concentrating elements, each of the waveguide portion further having a step feature associated with receiving the output light from the concentrating element; wherein the plurality of optical elements and the waveguide each form contiguous horizontal layers disposed in a vertical stack.
32. An optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a concentrating element for collecting and repositioning light; and
b) an associated redirecting element which is optically associated with and physically separate from the concentrating element for receiving light from the concentrating element, wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction, and the layer being contiguous between at least a portion of each of the associated redirecting elements;
the optical concentrator further including a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation, the waveguide aggregating the light from the plurality of optical elements to provide optical concentration of the light for use thereof.
33. The optical concentrator as defined in claim 32 wherein the plurality of optical elements and the stepped waveguide each form a contiguous layer and are disposed in a stack of physically separate components, thereby enabling direct assembly of separate parts comprising the optical concentrator.
34. The optical concentrator as defined in claim 32 wherein the waveguide includes an upper and a lower element which are substantially parallel.
35. The optical concentrator as defined in claim 32 wherein the optical elements are selected from the group consisting of a parabolic surface, an arc, a refractive spherical component.
36. The optical concentrator as defined in claim 32 wherein the optical concentrator is linearly symmetric.
37. The optical concentrator as defined in claim 32 wherein the optical concentrator is rotationally symmetric.
38. The optical concentrator as defined in claim 32 wherein the optical concentrator further includes a receiver which collects the aggregated light for use thereof.
39. The optical concentrator as defined in claim 32 wherein the concentrating element is comprised of a combination of (1) a surface between a high index material and a low index material enabling refraction of input light and (2) a parabolic reflective surface which repositions the input light with the combination outputting the input light without the input light being repositioned more than once by the parabolic reflective surface.
40. The optical concentrator as defined in claim 32 wherein an end of the stepped waveguide comprises additional optical features that redirect the light from the waveguide towards a receiver.
41. The optical concentrator as defined in claim 32 where the plurality of optical elements and the stepped waveguide are mirrored about a central axis to form at least two systems, such that a receiver in each of the at least two systems combine to form one contiguous receiver, and the optical concentrator comprises an increased width of at least about twice that of one system while retaining a same height.
42. The optical concentrator as defined in claim 32 wherein the concentrating element and the redirecting element have a size selected from the group of about the same size and varying size.
43. A optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including a concentrator element for collecting and repositioning input light;
and the optical concentrator further including:
a waveguide comprised of a plurality of portions with each of the portions associated with one of the concentrating elements, each of the waveguide portions further having a feature associated with receiving the output light from the concentrating element, the waveguide aggregating the light from the plurality of optical elements;
wherein the plurality of optical elements and the waveguide each form contiguous horizontal layers disposed in a vertical stack.
44. An optical system for processing light from a light source to provide illumination output, comprising:
a stepped waveguide for collecting input light from a light source and delivering the input light to step features of the stepped waveguide;
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a redirecting element for receiving the input light from the stepped waveguide and repositioning the input light;
b) an associated concentrating element which is associated with and separate from the redirecting element for receiving light from the redirecting element and diffusing the light for output therefrom to provide the illumination output, wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least a portion of each of the associated redirecting elements.
45. An optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a refracting concentrator element for collecting and repositioning light; and
b) an associated redirecting element which is associated with and separate from the concentrating element for receiving the light from the concentrating element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least a portion of each of the optical elements;
and the optical concentrator further including:
a waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the waveguide for accumulation, the redirecting element being an integral part of the waveguide, the waveguide having top and bottom surfaces that are substantially parallel, the waveguide having a substantially uniform thickness along its length, and the optical elements constructed so as to insert the light into the waveguide such that light is propagated multi-directionally within the waveguide.
46. An optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a refracting concentrator element for collecting and repositioning light; and
b) an associated redirecting element which is associated with and separate from the concentrating element for receiving light from the concentrating element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being contiguous between at least a portion of each of the associated redirecting elements;
and the optical concentrator further including:
a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation; and
an additional optical element coupled to the stepped waveguide that redirects the light from the waveguide towards a light receiver.
47. An optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a concentrating element for collecting and repositioning light; and
b) an associated redirecting element which is associated with and separate from the concentrating element for receiving light from the concentrating element, wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction, and the layer being contiguous between at least a portion of each of the associated redirecting elements;
the optical concentrator further including a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation;
the above elements being constructed in a cross-section, the cross-section then being extruded to form the optical concentrator.
48. An optical concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
a) a concentrating element for collecting and repositioning light, wherein the light is repositioned along one axis of the concentrating element; and
b) an associated redirecting element which is associated with and separate from the concentrating element for receiving light from the concentrating element, wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction, and the layer being contiguous between at least a portion of each of the associated redirecting elements;
the optical concentrator further including a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
49. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer within which the light does not undergo a repositioning change of direction and the layer being continuous between at least one portion of each of the associated redirecting elements;
and the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation; and
a light receiver for receiving the light from the stepped waveguide.
50. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer; and
the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation, wherein the light does not undergo a repositioning change of direction prior to entering the waveguide; and
a light receiver for receiving the light from the stepped waveguide.
51. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a section of the concentrator element within which the light does not undergo a repositioning change of direction and the section being contiguous between at least a portion of each of the associated redirecting elements;
and the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
52. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a material section of the concentrator element within which the light does not undergo a repositioning change of direction and the section being continuous between at least a portion of each of the associated redirecting elements;
and the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
53. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a refractive concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a section of the concentrator element within which the light does not undergo a repositioning change of direction and the section being continuous between at least a portion of each of the associated redirecting elements; and
the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
54. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a refractive concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a section of the concentrator element within which the light does not undergo a repositioning change of direction and the section being continuous between at least a portion of each of the associated redirecting elements; and
the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation.
55. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including:
(a) a refractive concentrator element for collecting and repositioning input light; and
(b) an associated redirecting element which is associated with and separate from the concentrator element for receiving the light from the concentrator element wherein the concentrating element of each of the plurality of optical elements is separated from at least one portion of the associated redirecting element by a layer; and
the solar concentrator further including: a stepped waveguide for receiving the light from the at least one portion of the associated redirecting element which is constructed to reposition the light into the stepped waveguide for accumulation, wherein the light does not undergo a repositioning change of direction prior to entering the waveguide.
56. A solar concentrator comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including a concentrating element comprised of a combination of
(1) a surface between a high index material of the optical elements and a low index external material enabling refraction of input light and
(2) a parabolic reflective surface which repositions the input light with the combination outputting the light without the light being repositioned more than once by the parabolic reflective surface;
a waveguide comprised of a plurality of portions with each of the portions associated with a corresponding one of the concentrating elements, each of the waveguide portion further having a step feature associated with receiving the output light from the concentrating element and the waveguide including top and bottom wall sections which are substantially parallel to each other, thereby preserving concentration of the light for delivery to a receiver.
57. A solar concentrator, comprising:
a plurality of optical elements disposed adjacent each other with each of the plurality of optical elements including a concentrator element for collecting and repositioning input light; and
the solar concentrator further including: a stepped waveguide comprised of a plurality of portions with each of the portions associated with a corresponding one of the concentrating elements, each of the waveguide portion further having a step feature associated with receiving the output light from the concentrating element; wherein the plurality of optical elements and the waveguide each form continuous horizontal layers disposed in a vertical stack.
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Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120092772A1 (en) * | 2009-05-14 | 2012-04-19 | Yair Salomon | Light collection system and method |
WO2014052902A1 (en) * | 2012-09-30 | 2014-04-03 | Taber William Stevens Jr | Radiation collection utilizing total internal reflection and other techniques for the purpose of dispatchble electricity generation and other uses |
US8767302B2 (en) * | 2012-11-08 | 2014-07-01 | National Taiwan University Of Science And Technology | Laminated optical disk |
WO2014146078A2 (en) | 2013-03-15 | 2014-09-18 | Morgan Solar Inc. | Sunlight concentrating and harvesting device |
US9046279B2 (en) | 2011-10-19 | 2015-06-02 | Nikon Corporation | Light condensing device, photovoltaic power generation device and photo-thermal conversion device |
WO2015187739A1 (en) * | 2014-06-02 | 2015-12-10 | California Institute Of Technology | Large-scale space-based solar power station: efficient power generation tiles |
WO2016007231A1 (en) * | 2014-05-30 | 2016-01-14 | Cree, Inc. | Optical components for luminaire |
US20160085017A1 (en) * | 2014-09-24 | 2016-03-24 | Federal-Mogul Corporation | Waveguide for controlled light distribution |
US9335530B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Planar solar energy concentrator |
US9513424B2 (en) | 2013-03-15 | 2016-12-06 | Cree, Inc. | Optical components for luminaire |
US20160376037A1 (en) | 2014-05-14 | 2016-12-29 | California Institute Of Technology | Large-Scale Space-Based Solar Power Station: Packaging, Deployment and Stabilization of Lightweight Structures |
US9581750B2 (en) | 2013-03-15 | 2017-02-28 | Cree, Inc. | Outdoor and/or enclosed structure LED luminaire |
US9632295B2 (en) | 2014-05-30 | 2017-04-25 | Cree, Inc. | Flood optic |
US9920901B2 (en) | 2013-03-15 | 2018-03-20 | Cree, Inc. | LED lensing arrangement |
US10283659B2 (en) | 2016-11-06 | 2019-05-07 | Jitsen Chang | Configurations for solar cells, solar panels, and solar panel systems |
US10379278B2 (en) | 2013-03-15 | 2019-08-13 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire outdoor and/or enclosed structure LED luminaire having outward illumination |
US10422944B2 (en) | 2013-01-30 | 2019-09-24 | Ideal Industries Lighting Llc | Multi-stage optical waveguide for a luminaire |
US10454565B2 (en) | 2015-08-10 | 2019-10-22 | California Institute Of Technology | Systems and methods for performing shape estimation using sun sensors in large-scale space-based solar power stations |
US10490682B2 (en) | 2018-03-14 | 2019-11-26 | National Mechanical Group Corp. | Frame-less encapsulated photo-voltaic solar panel supporting solar cell modules encapsulated within multiple layers of optically-transparent epoxy-resin materials |
US10502899B2 (en) | 2013-03-15 | 2019-12-10 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire |
US10696428B2 (en) | 2015-07-22 | 2020-06-30 | California Institute Of Technology | Large-area structures for compact packaging |
US10992253B2 (en) | 2015-08-10 | 2021-04-27 | California Institute Of Technology | Compactable power generation arrays |
US11112083B2 (en) | 2013-03-15 | 2021-09-07 | Ideal Industries Lighting Llc | Optic member for an LED light fixture |
US11128179B2 (en) | 2014-05-14 | 2021-09-21 | California Institute Of Technology | Large-scale space-based solar power station: power transmission using steerable beams |
US11634240B2 (en) | 2018-07-17 | 2023-04-25 | California Institute Of Technology | Coilable thin-walled longerons and coilable structures implementing longerons and methods for their manufacture and coiling |
US11772826B2 (en) | 2018-10-31 | 2023-10-03 | California Institute Of Technology | Actively controlled spacecraft deployment mechanism |
Families Citing this family (166)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008072224A2 (en) * | 2006-12-13 | 2008-06-19 | Pythagoras Solar Inc. | Solar radiation collector |
US9040808B2 (en) * | 2007-05-01 | 2015-05-26 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US9337373B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Light-guide solar module, method of fabrication thereof, and panel made therefrom |
CA2698284C (en) * | 2007-09-10 | 2013-06-25 | Banyan Energy, Inc. | Compact optics for concentration, aggregation and illumination of light energy |
US8412010B2 (en) | 2007-09-10 | 2013-04-02 | Banyan Energy, Inc. | Compact optics for concentration and illumination systems |
US7672549B2 (en) * | 2007-09-10 | 2010-03-02 | Banyan Energy, Inc. | Solar energy concentrator |
ES2326456B1 (en) * | 2008-01-30 | 2010-05-25 | Abengoa Solar New Technologies S.A. | LOW SOLAR CONCENTRATION PLANT AND METHOD TO MAXIMIZE THE ELECTRICAL ENERGY PRODUCTION OF ITS PHOTOVOLTAIC MODULES. |
WO2009139896A2 (en) | 2008-05-16 | 2009-11-19 | Soliant Energy, Inc. | Concentrating photovoltaic solar panel |
US20100024805A1 (en) * | 2008-07-29 | 2010-02-04 | Genie Lens Technologies, Llc | Solar panels for concentrating, capturing, and transmitting solar energy in conversion systems |
MX2011002993A (en) | 2008-09-19 | 2011-05-30 | Univ California | System and method for solar energy capture and related method of manufacturing. |
US8730179B2 (en) * | 2008-09-30 | 2014-05-20 | Apple Inc. | Integrated touch sensor and solar assembly |
US20120024374A1 (en) * | 2008-10-02 | 2012-02-02 | Raydyne Energy, Inc. | Solar energy concentrator |
CN102187161A (en) * | 2008-10-15 | 2011-09-14 | 库尔迪普·辛格·维尔卡 | Solar panels |
ES2364665B1 (en) * | 2008-11-12 | 2012-05-23 | Abengoa Solar New Technologies, S.A. | LIGHTING AND CONCENTRATION SYSTEM. |
JP2010141297A (en) * | 2008-11-14 | 2010-06-24 | Nippon Leiz Co Ltd | Light guide, photoelectric converter, and flat surface photoelectric conversion device |
TW201023379A (en) * | 2008-12-03 | 2010-06-16 | Ind Tech Res Inst | Light concentrating module |
US20100165495A1 (en) * | 2008-12-29 | 2010-07-01 | Murtha R Michael | Collection optic for solar concentrating wedge |
US8266819B2 (en) * | 2009-01-07 | 2012-09-18 | Pratt & Whitney Rocketdyne, Inc. | Air drying system for concentrated solar power generation systems |
US8327839B2 (en) * | 2009-01-07 | 2012-12-11 | Pratt & Whitney Rocketdyne, Inc. | Air instrumentation system for concentrated solar power generation systems |
US8048250B2 (en) * | 2009-01-16 | 2011-11-01 | Genie Lens Technologies, Llc | Method of manufacturing photovoltaic (PV) enhancement films |
US7968790B2 (en) * | 2009-01-16 | 2011-06-28 | Genie Lens Technologies, Llc | Photovoltaic (PV) enhancement films for enhancing optical path lengths and for trapping reflected light |
US7904871B2 (en) * | 2009-01-16 | 2011-03-08 | Genie Lens Technologies, Llc | Computer-implemented method of optimizing refraction and TIR structures to enhance path lengths in PV devices |
US8338693B2 (en) * | 2009-01-16 | 2012-12-25 | Genie Lens Technology, LLC | Solar arrays and other photovoltaic (PV) devices using PV enhancement films for trapping light |
US9105783B2 (en) * | 2009-01-26 | 2015-08-11 | The Aerospace Corporation | Holographic solar concentrator |
KR101057790B1 (en) | 2009-02-03 | 2011-08-19 | 테라웨이브 주식회사 | Concentrating solar power module |
US20100236625A1 (en) * | 2009-02-20 | 2010-09-23 | John Kenney | Solar Modules Including Spectral Concentrators and Related Manufacturing Methods |
US20100224248A1 (en) * | 2009-02-20 | 2010-09-09 | John Kenney | Solar Modules Including Spectral Concentrators and Related Manufacturing Methods |
US20100212716A1 (en) * | 2009-02-20 | 2010-08-26 | Scott Lerner | Solar radiation collection using dichroic surface |
US20100212717A1 (en) * | 2009-02-20 | 2010-08-26 | Whitlock John P | Solar collector with optical waveguide |
US8774573B2 (en) | 2009-02-20 | 2014-07-08 | OmniPV, Inc. | Optical devices including resonant cavity structures |
CN102484159A (en) * | 2009-02-27 | 2012-05-30 | 科根纳太阳能公司 | 1-dimensional concentrated photovoltaic systems |
WO2010101644A1 (en) * | 2009-03-05 | 2010-09-10 | James Rosa | 3-d non-imaging radiant energy concentrator |
JP2010212280A (en) * | 2009-03-06 | 2010-09-24 | Sumitomo Electric Ind Ltd | Light guide structure for solar cell, solar cell unit and solar cell module |
CA2658193A1 (en) * | 2009-03-12 | 2010-09-12 | Morgan Solar Inc. | Stimulated emission luminescent light-guide solar concentrators |
WO2010124028A2 (en) * | 2009-04-21 | 2010-10-28 | Vasylyev Sergiy V | Light collection and illumination systems employing planar waveguide |
US8290318B2 (en) * | 2009-04-21 | 2012-10-16 | Svv Technology Innovations, Inc. | Light trapping optical cover |
EP2436041A2 (en) * | 2009-05-26 | 2012-04-04 | Cogenra Solar, Inc. | Concentrating solar photovoltaic-thermal system |
JP2012531623A (en) | 2009-06-24 | 2012-12-10 | ユニバーシティー オブ ロチェスター | Stepped light collection and collection system, components thereof, and methods |
US9246038B2 (en) | 2009-06-24 | 2016-01-26 | University Of Rochester | Light collecting and emitting apparatus, method, and applications |
JP2012531622A (en) | 2009-06-24 | 2012-12-10 | ユニバーシティー オブ ロチェスター | Dimple-type light collection and collection system, components and methods thereof |
US8189970B2 (en) | 2009-06-24 | 2012-05-29 | University Of Rochester | Light collecting and emitting apparatus, method, and applications |
TWI409967B (en) * | 2009-07-13 | 2013-09-21 | Epistar Corp | A solar cell module and the fabrication method of the same |
TWI482995B (en) * | 2009-07-20 | 2015-05-01 | Ind Tech Res Inst | Light collecting device and illumination apparatus |
CN102947745A (en) * | 2009-08-20 | 2013-02-27 | 光处方革新有限公司 | Stepped flow-line concentrators and collimators |
JP5443494B2 (en) * | 2009-08-21 | 2014-03-19 | 株式会社東芝 | Optical element and display device |
JP2011059323A (en) * | 2009-09-09 | 2011-03-24 | Leiz Advanced Technology Corp | Condensing module and condensing unit using the same |
US7946286B2 (en) * | 2009-09-24 | 2011-05-24 | Genie Lens Technologies, Llc | Tracking fiber optic wafer concentrator |
WO2011039356A1 (en) * | 2009-10-01 | 2011-04-07 | Danmarks Tekniske Universitet | Solar energy harvesting system |
KR20110048406A (en) * | 2009-11-02 | 2011-05-11 | 엘지이노텍 주식회사 | Solar cell and method of fabricating the same |
US20110017267A1 (en) * | 2009-11-19 | 2011-01-27 | Joseph Isaac Lichy | Receiver for concentrating photovoltaic-thermal system |
US8937242B2 (en) | 2009-11-24 | 2015-01-20 | Industrial Technology Research Institute | Solar energy system |
KR101567764B1 (en) * | 2009-11-25 | 2015-11-11 | 반얀 에너지, 인크 | Solar module construction |
US20110162712A1 (en) | 2010-01-07 | 2011-07-07 | Martin David Tillin | Non-tracked low concentration solar apparatus |
US20110232719A1 (en) * | 2010-02-17 | 2011-09-29 | Freda Robert M | Solar power system |
ES2364310B1 (en) | 2010-02-19 | 2012-04-02 | Abengoa Solar New Technologies, S.A | SOLAR PHOTOVOLTAIC CONCENTRATION SYSTEM |
US8673186B2 (en) * | 2010-03-02 | 2014-03-18 | Microsoft Corporation | Fabrication of an optical wedge |
US20110220173A1 (en) * | 2010-03-09 | 2011-09-15 | Michael Lebby | Active solar concentrator with multi-junction devices |
WO2011114240A2 (en) * | 2010-03-19 | 2011-09-22 | Morgan Solar Inc. | Solar-light concentration apparatus |
WO2011120148A1 (en) * | 2010-04-01 | 2011-10-06 | Morgan Solar Inc. | An integrated photovoltaic module |
US20110271999A1 (en) | 2010-05-05 | 2011-11-10 | Cogenra Solar, Inc. | Receiver for concentrating photovoltaic-thermal system |
US8686279B2 (en) | 2010-05-17 | 2014-04-01 | Cogenra Solar, Inc. | Concentrating solar energy collector |
WO2011149589A1 (en) | 2010-05-24 | 2011-12-01 | Cogenra Solar, Inc. | Concentrating solar energy collector |
US8642937B1 (en) * | 2010-05-27 | 2014-02-04 | Exelis, Inc. | Full-aperture, back-illuminated, uniform-scene for remote sensing optical payload calibration |
US8624612B2 (en) * | 2010-06-15 | 2014-01-07 | Electronic Testing Services, Llc | RF non-contact thin film measurement using two port waveguide |
US8735791B2 (en) | 2010-07-13 | 2014-05-27 | Svv Technology Innovations, Inc. | Light harvesting system employing microstructures for efficient light trapping |
CN103038577B (en) * | 2010-07-30 | 2015-11-25 | 摩根阳光公司 | Light-guide solar module and manufacture method thereof and the cell panel be made up of it |
DE102010034020A1 (en) * | 2010-08-11 | 2012-02-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Surface structure and Fresnel lens and tool for producing a surface structure |
US20130176727A1 (en) * | 2010-09-21 | 2013-07-11 | Koninklijke Philips Electronics N.V. | Segmented spotlight having narrow beam size and high lumen output |
ES2399254B1 (en) | 2010-09-27 | 2013-11-11 | Abengoa Solar New Technologies S.A | REFLEXIVE SYSTEM OF SOLAR PHOTOVOLTAIC CONCENTRATION |
US8798432B2 (en) | 2010-10-21 | 2014-08-05 | Microsoft Corporation | Fabrication of a laminated optical wedge |
JP5944398B2 (en) * | 2010-10-28 | 2016-07-05 | バニヤン エナジー インコーポレイテッド | Turning optics for heat collection and lighting systems |
CN102544172B (en) * | 2010-12-30 | 2015-10-21 | 财团法人工业技术研究院 | Focusing-type solar energy light guide module |
US8885995B2 (en) | 2011-02-07 | 2014-11-11 | Morgan Solar Inc. | Light-guide solar energy concentrator |
US9806425B2 (en) * | 2011-02-11 | 2017-10-31 | AMI Research & Development, LLC | High performance low profile antennas |
US9246230B2 (en) | 2011-02-11 | 2016-01-26 | AMI Research & Development, LLC | High performance low profile antennas |
DE102011004349A1 (en) * | 2011-02-17 | 2012-08-23 | Automotive Lighting Reutlingen Gmbh | Lighting device of a motor vehicle |
US8928988B1 (en) | 2011-04-01 | 2015-01-06 | The Regents Of The University Of California | Monocentric imaging |
US8791355B2 (en) * | 2011-04-20 | 2014-07-29 | International Business Machines Corporation | Homogenizing light-pipe for solar concentrators |
US9263605B1 (en) | 2011-04-20 | 2016-02-16 | Morgan Solar Inc. | Pulsed stimulated emission luminescent photovoltaic solar concentrator |
JP2012248776A (en) * | 2011-05-31 | 2012-12-13 | Dainippon Printing Co Ltd | Condensing element and solar cell system |
ITMI20110994A1 (en) * | 2011-05-31 | 2012-12-01 | Andrea Cincotto | PHOTOVOLTAIC APPARATUS |
US20140183960A1 (en) | 2011-06-22 | 2014-07-03 | Morgan Solar Inc. | Photovoltaic power generation system |
WO2013011613A1 (en) * | 2011-07-15 | 2013-01-24 | パナソニック株式会社 | Condensing lens array, and solar cell provided with same |
US8847142B2 (en) | 2011-07-20 | 2014-09-30 | Hong Kong Applied Science and Technology Research Institute, Co. Ltd. | Method and device for concentrating, collimating, and directing light |
US9108369B2 (en) | 2011-07-25 | 2015-08-18 | Microsoft Technology Licensing, Llc | Wedge light guide |
JP5569484B2 (en) * | 2011-07-27 | 2014-08-13 | 三菱電機株式会社 | Concentrator and solar cell with concentrator |
CN103858336B (en) | 2011-08-15 | 2017-12-08 | 摩根阳光公司 | Self-stabilization equipment for solar tracking |
KR101347785B1 (en) * | 2011-08-29 | 2014-01-10 | 정재헌 | An elliptical mirror optic condensing guide |
US9482871B2 (en) | 2011-08-30 | 2016-11-01 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Light concentration and energy conversion system |
US20130071716A1 (en) * | 2011-09-16 | 2013-03-21 | General Electric Company | Thermal management device |
KR101282197B1 (en) * | 2011-10-10 | 2013-07-04 | (주) 비제이파워 | Solar condensing module system for utilizing lens |
KR101282192B1 (en) * | 2011-10-10 | 2013-07-04 | (주) 비제이파워 | Solar condensing module system for utilizing reflected light |
JP2013110273A (en) * | 2011-11-21 | 2013-06-06 | Sharp Corp | Semiconductor light-emitting device |
US8328403B1 (en) * | 2012-03-21 | 2012-12-11 | Morgan Solar Inc. | Light guide illumination devices |
WO2013165694A1 (en) * | 2012-05-02 | 2013-11-07 | 3M Innovative Properties Company | Rack mounted light |
US10720541B2 (en) | 2012-06-26 | 2020-07-21 | Lockheed Martin Corporation | Foldable solar tracking system, assembly and method for assembly, shipping and installation of the same |
US9496822B2 (en) | 2012-09-24 | 2016-11-15 | Lockheed Martin Corporation | Hurricane proof solar tracker |
US20140124014A1 (en) | 2012-11-08 | 2014-05-08 | Cogenra Solar, Inc. | High efficiency configuration for solar cell string |
WO2014085853A1 (en) * | 2012-12-03 | 2014-06-12 | Tropiglas Technologies Ltd | A spectrally selective panel |
US9318636B2 (en) * | 2012-12-11 | 2016-04-19 | International Business Machines Corporation | Secondary optic for concentrating photovoltaic device |
WO2014105093A2 (en) * | 2012-12-31 | 2014-07-03 | Leo Didomenico | Concentrating solar panel with integrated tracker |
US9575244B2 (en) * | 2013-01-04 | 2017-02-21 | Bal Makund Dhar | Light guide apparatus and fabrication method thereof |
US9270225B2 (en) | 2013-01-14 | 2016-02-23 | Sunpower Corporation | Concentrating solar energy collector |
JP6304768B2 (en) * | 2013-01-21 | 2018-04-04 | 合同会社 Holomedia | Condensing mechanism, solar power generation device and window structure |
WO2014116498A1 (en) | 2013-01-23 | 2014-07-31 | Dow Global Technologies Llc | Solar waveguide concentrator |
US9291320B2 (en) | 2013-01-30 | 2016-03-22 | Cree, Inc. | Consolidated troffer |
EP2951497B1 (en) * | 2013-01-30 | 2020-01-29 | Ideal Industries Lighting Llc | Light engine |
US9869432B2 (en) | 2013-01-30 | 2018-01-16 | Cree, Inc. | Luminaires using waveguide bodies and optical elements |
US9366396B2 (en) | 2013-01-30 | 2016-06-14 | Cree, Inc. | Optical waveguide and lamp including same |
US9519095B2 (en) | 2013-01-30 | 2016-12-13 | Cree, Inc. | Optical waveguides |
US9625638B2 (en) | 2013-03-15 | 2017-04-18 | Cree, Inc. | Optical waveguide body |
US9690029B2 (en) | 2013-01-30 | 2017-06-27 | Cree, Inc. | Optical waveguides and luminaires incorporating same |
US9442243B2 (en) | 2013-01-30 | 2016-09-13 | Cree, Inc. | Waveguide bodies including redirection features and methods of producing same |
EP2962149B8 (en) * | 2013-02-28 | 2018-05-16 | 1930106 Ontario Limited | Light-concentrating lens assembly for a solar energy recovery system |
US9194607B2 (en) * | 2013-03-13 | 2015-11-24 | R. Michael Murtha | Solar concentrating wedge, compact and ventilated |
US9960303B2 (en) | 2013-03-15 | 2018-05-01 | Morgan Solar Inc. | Sunlight concentrating and harvesting device |
US9798072B2 (en) | 2013-03-15 | 2017-10-24 | Cree, Inc. | Optical element and method of forming an optical element |
US9366799B2 (en) | 2013-03-15 | 2016-06-14 | Cree, Inc. | Optical waveguide bodies and luminaires utilizing same |
EP2971950B1 (en) | 2013-03-15 | 2021-05-19 | Morgan Solar Inc. | Light panel, optical assembly with improved interface and light panel with improved manufacturing tolerances |
WO2014141204A1 (en) | 2013-03-15 | 2014-09-18 | Morgan Solar Inc. | Optics for illumination devices and solar concentrators |
US10209429B2 (en) | 2013-03-15 | 2019-02-19 | Cree, Inc. | Luminaire with selectable luminous intensity pattern |
US9595627B2 (en) | 2013-03-15 | 2017-03-14 | John Paul Morgan | Photovoltaic panel |
US10436970B2 (en) | 2013-03-15 | 2019-10-08 | Ideal Industries Lighting Llc | Shaped optical waveguide bodies |
US9714756B2 (en) | 2013-03-15 | 2017-07-25 | Morgan Solar Inc. | Illumination device |
CN104968998B (en) * | 2013-05-21 | 2019-01-01 | 松下知识产权经营株式会社 | Lighting device |
US9212968B1 (en) * | 2013-08-28 | 2015-12-15 | Exelis, Inc. | Onboard calibration source for spectral calibraton of a radiometer |
US10606051B2 (en) * | 2013-09-01 | 2020-03-31 | Varun Akur Venkatesan | Optical system for light collection |
US20150068585A1 (en) * | 2013-09-11 | 2015-03-12 | Edward Nathan Segal | Capturing Reflected Solar EMR Energy |
US20160276514A1 (en) * | 2013-11-12 | 2016-09-22 | Nitto Denko Corporation | Solar energy collection systems utilizing holographic optical elements useful for building integrated photovoltaics |
CN103672720B (en) * | 2013-12-10 | 2015-11-18 | 杭州奕华能源科技有限公司 | Total internal reflection light collecting device |
JP6269069B2 (en) * | 2014-01-07 | 2018-01-31 | 株式会社ニコン | Concentrating device, photovoltaic device, and manufacturing method of concentrating device |
ES2493740B1 (en) * | 2014-01-27 | 2015-10-08 | Universidad De Jaén | Light beam beam concentration system |
CN106062474B (en) * | 2014-03-06 | 2020-10-16 | 奥塔艾丽克特龙尼克亚茜姆塔圣维泰克公司 | Lamp with a light source |
TWI554734B (en) * | 2014-03-13 | 2016-10-21 | 國立臺灣師範大學 | Sunlight-collecting system |
US11655950B2 (en) * | 2014-03-15 | 2023-05-23 | Ideal Industries Lighting Llc | Lighting devices having optical waveguides for controlled light distribution |
US11302832B2 (en) | 2014-05-01 | 2022-04-12 | Sec Optics Llc | Optical solar enhancer |
KR102244427B1 (en) * | 2014-06-02 | 2021-04-27 | 엘지이노텍 주식회사 | Lighting device |
JP2016004809A (en) * | 2014-06-13 | 2016-01-12 | Tdk株式会社 | solar battery |
US20160238388A1 (en) * | 2015-02-17 | 2016-08-18 | Vivint Solar, Inc. | Solar system installation |
WO2017061448A1 (en) * | 2015-10-09 | 2017-04-13 | 国立大学法人北海道大学 | Optical waveguide device, photoelectric conversion device, architectural structure, electronic apparatus and light-emitting device |
JP6694127B2 (en) * | 2015-12-10 | 2020-05-13 | 峰生 松山 | Solar power system |
DE102015122055B4 (en) * | 2015-12-17 | 2018-08-30 | Carl Zeiss Ag | Optical system and method for transmitting a source image |
US10541643B2 (en) | 2015-12-21 | 2020-01-21 | Raydyne Energy, Inc. | Two-axis solar concentrator system |
US10416377B2 (en) | 2016-05-06 | 2019-09-17 | Cree, Inc. | Luminaire with controllable light emission |
US11719882B2 (en) | 2016-05-06 | 2023-08-08 | Ideal Industries Lighting Llc | Waveguide-based light sources with dynamic beam shaping |
WO2018027331A1 (en) | 2016-08-12 | 2018-02-15 | Bigz Tech Inc. | Light collection device |
DE202017006810U1 (en) * | 2016-11-03 | 2018-07-27 | Basf Se | The daylight lighting system |
WO2018138548A1 (en) | 2017-01-25 | 2018-08-02 | Morgan Solar Inc. | Solar concentrator apparatus and solar collector array |
US20200185557A1 (en) | 2017-05-16 | 2020-06-11 | Morgan Solar Inc. | Device for harvesting sunlight |
KR101940921B1 (en) | 2017-08-18 | 2019-01-22 | 주식회사 포스코 | Pattern glass and solar cell module having thereof |
US11227964B2 (en) | 2017-08-25 | 2022-01-18 | California Institute Of Technology | Luminescent solar concentrators and related methods of manufacturing |
JP7270252B2 (en) * | 2017-09-22 | 2023-05-10 | 国立大学法人北海道大学 | Optical waveguide devices, photoelectric conversion devices, buildings, electronic devices, moving bodies, and electromagnetic wave waveguide devices |
US11362229B2 (en) | 2018-04-04 | 2022-06-14 | California Institute Of Technology | Epitaxy-free nanowire cell process for the manufacture of photovoltaics |
US11041338B2 (en) * | 2018-08-21 | 2021-06-22 | California Institute Of Technology | Windows implementing effectively transparent conductors and related methods of manufacturing |
US10739513B2 (en) | 2018-08-31 | 2020-08-11 | RAB Lighting Inc. | Apparatuses and methods for efficiently directing light toward and away from a mounting surface |
US10801679B2 (en) | 2018-10-08 | 2020-10-13 | RAB Lighting Inc. | Apparatuses and methods for assembling luminaires |
US10483906B1 (en) | 2018-10-17 | 2019-11-19 | Orenko Limited | Photovoltaic solar conversion |
US10393407B1 (en) | 2018-10-17 | 2019-08-27 | Orenko Limited | Heat transfer and thermal storage apparatus |
US10578795B1 (en) | 2018-10-17 | 2020-03-03 | Orenko Limited | Light collection housing |
TWI693787B (en) * | 2019-01-25 | 2020-05-11 | 國立臺灣師範大學 | Flat-plate light collecting device |
US11939688B2 (en) | 2019-03-29 | 2024-03-26 | California Institute Of Technology | Apparatus and systems for incorporating effective transparent catalyst for photoelectrochemical application |
DE102020100960A1 (en) * | 2019-12-23 | 2021-06-24 | Bergische Universität Wuppertal | Light concentrator |
US11496090B2 (en) * | 2020-02-20 | 2022-11-08 | National Taiwan Normal University | Light-modulating device |
CN111063749B (en) * | 2020-03-16 | 2021-12-31 | 徐闻京能新能源有限公司 | Solar cell |
RS1666U1 (en) | 2020-06-03 | 2020-11-30 | Inst Za Nuklearne Nauke Vinca | Optical system for cooling, light manipulation, and improvement of photovoltage response of commercial solar panels |
TWI730850B (en) * | 2020-07-22 | 2021-06-11 | 茂林光電科技股份有限公司 | Light guide bar |
Family Cites Families (204)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780722A (en) * | 1972-04-26 | 1973-12-25 | Us Navy | Fiber optical solar collector |
US4037096A (en) * | 1974-08-09 | 1977-07-19 | American Sterilizer Company | Illuminator apparatus using optical reflective methods |
US4151582A (en) * | 1974-12-26 | 1979-04-24 | Izon Corporation | Point array sheet lighting apparatus |
CA1115156A (en) | 1975-11-03 | 1981-12-29 | Roland Winston | Radiant energy collecting and transmitting device |
US4074704A (en) * | 1976-05-28 | 1978-02-21 | Gellert Donald P | Process of and apparatus for solar heating and the like |
US4357486A (en) | 1978-03-16 | 1982-11-02 | Atlantic Richfield Company | Luminescent solar collector |
US4261335A (en) * | 1978-10-16 | 1981-04-14 | Balhorn Alan C | Solar energy apparatus |
US4252416A (en) * | 1978-10-23 | 1981-02-24 | Societe Suisse Pour L'industrie Horlogere Management Services S.A. | Optical instrument for gathering and distribution of light |
US4199376A (en) | 1978-11-06 | 1980-04-22 | Atlantic Richfield Company | Luminescent solar collector |
US4282862A (en) * | 1979-11-09 | 1981-08-11 | Soleau Bertrand S | Thin-line collectors |
FR2472135A1 (en) | 1979-12-20 | 1981-06-26 | Cibie Projecteurs | PROJECTOR, IN PARTICULAR FOR MOTOR VEHICLES |
US4257401A (en) * | 1980-01-02 | 1981-03-24 | Daniels Ronald M | Solar heat collector |
US4292959A (en) * | 1980-02-25 | 1981-10-06 | Exxon Research & Engineering Co. | Solar energy collection system |
US4529830A (en) | 1980-08-18 | 1985-07-16 | Maurice Daniel | Apparatus for collecting, distributing and utilizing solar radiation |
US4411490A (en) | 1980-08-18 | 1983-10-25 | Maurice Daniel | Apparatus for collecting, distributing and utilizing solar radiation |
US4344417A (en) * | 1980-10-21 | 1982-08-17 | Jan Malecek | Solar energy collector |
US4496211A (en) | 1980-12-05 | 1985-01-29 | Maurice Daniel | Lightpipe network with optical devices for distributing electromagnetic radiation |
US4379613A (en) * | 1981-02-23 | 1983-04-12 | Exxon Research And Engineering Co. | Solar energy collector |
FR2514105A1 (en) | 1981-10-05 | 1983-04-08 | Cibie Projecteurs | LIGHT-DRIVEN PROJECTOR FOR MOTOR VEHICLES |
US4691994A (en) * | 1981-10-06 | 1987-09-08 | Afian Viktor V | Method for a solar concentrator manufacturing |
US4863224A (en) | 1981-10-06 | 1989-09-05 | Afian Viktor V | Solar concentrator and manufacturing method therefor |
US4505264A (en) | 1983-12-27 | 1985-03-19 | Universite Laval | Electromagnetic wave concentrator |
FR2566925B1 (en) * | 1984-06-29 | 1987-11-27 | Blanc Michel | NON-IMAGING MULTIDIRECTIONAL RADIATION CONCENTRATOR |
US4539625A (en) * | 1984-07-31 | 1985-09-03 | Dhr, Incorporated | Lighting system combining daylight concentrators and an artificial source |
US4798448A (en) * | 1988-02-16 | 1989-01-17 | General Electric Company | High efficiency illumination system for display devices |
JPH0635203Y2 (en) * | 1988-09-27 | 1994-09-14 | アルプス電気株式会社 | Light guide for illumination |
US5005108A (en) | 1989-02-10 | 1991-04-02 | Lumitex, Inc. | Thin panel illuminator |
JPH0325983A (en) * | 1989-06-23 | 1991-02-04 | Yoshikazu Iwamoto | Service basic logic circuit for maximum output of solar light condensing distribution application apparatus and technical application |
US5280557A (en) * | 1989-07-10 | 1994-01-18 | Nwasokwa Daniel C | Nonmaterial deflector-enhanced collector (NDC) |
US5089055A (en) | 1989-12-12 | 1992-02-18 | Takashi Nakamura | Survivable solar power-generating systems for use with spacecraft |
US5202950A (en) | 1990-09-27 | 1993-04-13 | Compaq Computer Corporation | Backlighting system with faceted light pipes |
US5050946A (en) * | 1990-09-27 | 1991-09-24 | Compaq Computer Corporation | Faceted light pipe |
US5269851A (en) * | 1991-02-25 | 1993-12-14 | United Solar Technologies, Inc. | Solar energy system |
US5220462A (en) * | 1991-11-15 | 1993-06-15 | Feldman Jr Karl T | Diode glazing with radiant energy trapping |
JP3098835B2 (en) * | 1992-01-13 | 2000-10-16 | 本田技研工業株式会社 | Solar cell coating |
US5528720A (en) | 1992-03-23 | 1996-06-18 | Minnesota Mining And Manufacturing Co. | Tapered multilayer luminaire devices |
US5806955A (en) | 1992-04-16 | 1998-09-15 | Tir Technologies, Inc. | TIR lens for waveguide injection |
US5197792A (en) | 1992-04-21 | 1993-03-30 | General Motors Corporation | Illuminator device for a display panel |
US5438485A (en) * | 1993-01-07 | 1995-08-01 | Ford Motor Company | Illuminator for use with a remote light source |
JPH06314069A (en) | 1993-03-03 | 1994-11-08 | Fujitsu Ltd | Illuminating device |
JPH06275859A (en) * | 1993-03-24 | 1994-09-30 | Omron Corp | Condensing device for solar cell |
US5357592A (en) * | 1993-08-17 | 1994-10-18 | Martin Marietta Corporation | Optical energy concentrator/reflector |
US5485354A (en) * | 1993-09-09 | 1996-01-16 | Precision Lamp, Inc. | Flat panel display lighting system |
US5428468A (en) * | 1993-11-05 | 1995-06-27 | Alliedsignal Inc. | Illumination system employing an array of microprisms |
US6129439A (en) * | 1993-11-05 | 2000-10-10 | Alliedsignal Inc. | Illumination system employing an array of multi-faceted microprisms |
US5521725A (en) * | 1993-11-05 | 1996-05-28 | Alliedsignal Inc. | Illumination system employing an array of microprisms |
US5396350A (en) * | 1993-11-05 | 1995-03-07 | Alliedsignal Inc. | Backlighting apparatus employing an array of microprisms |
US5390085A (en) * | 1993-11-19 | 1995-02-14 | Motorola, Inc. | Light diffuser for a liquid crystal display |
US5485291A (en) * | 1994-02-22 | 1996-01-16 | Precision Lamp, Inc. | Uniformly thin, high efficiency large area lighting panel with two facet grooves that are spaced apart and have light source facing facets with smaller slopes than the facets facing away from the light source |
US5719649A (en) | 1994-06-08 | 1998-02-17 | Kabushiki Kaisha Toshiba | Light guide and liquid crystal display device using it |
US5498297A (en) | 1994-09-15 | 1996-03-12 | Entech, Inc. | Photovoltaic receiver |
US5540216A (en) | 1994-11-21 | 1996-07-30 | Rasmusson; James K. | Apparatus and method for concentrating radiant energy emanated by a moving energy source |
AU4409496A (en) | 1994-11-29 | 1996-06-19 | Precision Lamp, Inc. | Edge light for panel display |
US5839812A (en) * | 1995-07-18 | 1998-11-24 | Gl Displays, Inc. | Flat parallel light source |
US5877874A (en) | 1995-08-24 | 1999-03-02 | Terrasun L.L.C. | Device for concentrating optical radiation |
US6011602A (en) * | 1995-11-06 | 2000-01-04 | Seiko Epson Corporation | Lighting apparatus with a light guiding body having projections in the shape of a trapezoid |
US5838403A (en) * | 1996-02-14 | 1998-11-17 | Physical Optics Corporation | Liquid crystal display system with internally reflecting waveguide for backlighting and non-Lambertian diffusing |
US6072551A (en) * | 1996-02-14 | 2000-06-06 | Physical Optics Corporation | Backlight apparatus for illuminating a display with controlled light output characteristics |
US5926601A (en) * | 1996-05-02 | 1999-07-20 | Briteview Technologies, Inc. | Stacked backlighting system using microprisms |
US5914760A (en) | 1996-06-21 | 1999-06-22 | Casio Computer Co., Ltd. | Surface light source device and liquid crystal display device using the same |
JPH10221528A (en) * | 1996-12-05 | 1998-08-21 | Toyota Motor Corp | Solar battery device |
US6473554B1 (en) | 1996-12-12 | 2002-10-29 | Teledyne Lighting And Display Products, Inc. | Lighting apparatus having low profile |
WO1999009349A1 (en) | 1997-08-12 | 1999-02-25 | Decoma International Inc. | Bireflective lens element |
US6021007A (en) | 1997-10-18 | 2000-02-01 | Murtha; R. Michael | Side-collecting lightguide |
US6057505A (en) | 1997-11-21 | 2000-05-02 | Ortabasi; Ugur | Space concentrator for advanced solar cells |
US6819687B1 (en) | 1997-12-10 | 2004-11-16 | Nellcor Puritan Bennett Incorporated | Non-imaging optical corner turner |
US6224223B1 (en) | 1997-12-22 | 2001-05-01 | Casio Computer Co., Ltd. | Illumination panel and display device using the same |
JP3174549B2 (en) * | 1998-02-26 | 2001-06-11 | 株式会社日立製作所 | Photovoltaic power generation device, photovoltaic power generation module, and method of installing photovoltaic power generation system |
US6036340A (en) | 1998-03-03 | 2000-03-14 | Ford Global Technologies, Inc. | Dimpled manifold optical element for a vehicle lighting system |
JPH11259007A (en) * | 1998-03-10 | 1999-09-24 | Sony Corp | Reflection type display device |
JPH11284803A (en) * | 1998-03-27 | 1999-10-15 | Citizen Electronics Co Ltd | Linear light source unit |
US6139176A (en) * | 1998-07-02 | 2000-10-31 | Federal-Mogul World Wide, Inc. | Optical waveguide structure with raised or embedded waveguides |
US6201246B1 (en) * | 1998-07-31 | 2001-03-13 | Infocus Corporation | Non-imaging optical concentrator for use in infrared remote control systems |
WO2000050808A1 (en) * | 1999-02-24 | 2000-08-31 | 3M Innovative Properties Company | Illumination device for producing predetermined intensity patterns |
GB9905642D0 (en) | 1999-03-11 | 1999-05-05 | Imperial College | Light concentrator for PV cells |
DE19937448A1 (en) | 1999-08-07 | 2001-02-08 | Steigerwald Niluh Kusani | Static concentrator concentrates light with aperture angle in excess of 20 degrees, preferably greater than 40 degrees, has simplified wide angle construction of at least two lenses |
US6623132B2 (en) | 1999-08-11 | 2003-09-23 | North American Lighting, Inc. | Light coupler hingedly attached to a light guide for automotive lighting |
US6570710B1 (en) | 1999-11-12 | 2003-05-27 | Reflexite Corporation | Subwavelength optical microstructure light collimating films |
US6440769B2 (en) * | 1999-11-26 | 2002-08-27 | The Trustees Of Princeton University | Photovoltaic device with optical concentrator and method of making the same |
ES2157846B1 (en) | 1999-12-02 | 2002-03-01 | Univ Madrid Politecnica | DEVICE WITH DISCONTINUOUS LENS WITH INTERNAL TOTAL REFLECTION AND ASPHERIC DIOPTRIC FOR CONCENTRATION OR COLIMATION OF RADIANT ENERGY. |
US6347874B1 (en) * | 2000-02-16 | 2002-02-19 | 3M Innovative Properties Company | Wedge light extractor with risers |
CA2402687C (en) * | 2000-03-16 | 2010-10-26 | Led Products, Inc. | High efficiency non-imaging optics |
JP2001289515A (en) | 2000-04-07 | 2001-10-19 | Masahiro Nishikawa | Planar solar ray concentrating device |
US6543911B1 (en) * | 2000-05-08 | 2003-04-08 | Farlight Llc | Highly efficient luminaire having optical transformer providing precalculated angular intensity distribution and method therefore |
DE10059455A1 (en) | 2000-11-30 | 2002-06-06 | Steigerwald Niluh Kusani | Static concentrator |
JP3944816B2 (en) * | 2001-01-31 | 2007-07-18 | ミネベア株式会社 | Surface lighting device |
US6541694B2 (en) * | 2001-03-16 | 2003-04-01 | Solar Enterprises International, Llc | Nonimaging light concentrator with uniform irradiance |
JP2002289900A (en) * | 2001-03-23 | 2002-10-04 | Canon Inc | Concentrating solar cell module and concentrating photovoltaic power generation system |
US6607286B2 (en) * | 2001-05-04 | 2003-08-19 | Lumileds Lighting, U.S., Llc | Lens and lens cap with sawtooth portion for light emitting diode |
US6425391B1 (en) * | 2001-05-23 | 2002-07-30 | Jeffrey A. Davoren | Electromagnetic radiation collector system |
US6576887B2 (en) * | 2001-08-15 | 2003-06-10 | 3M Innovative Properties Company | Light guide for use with backlit display |
WO2003027569A1 (en) * | 2001-09-26 | 2003-04-03 | Koninklijke Philips Electronics N.V. | Waveguide, edge-lit illumination arrangement and display comprising such |
US6637921B2 (en) * | 2001-09-28 | 2003-10-28 | Osram Sylvania Inc. | Replaceable LED bulb with interchangeable lens optic |
US6804062B2 (en) | 2001-10-09 | 2004-10-12 | California Institute Of Technology | Nonimaging concentrator lens arrays and microfabrication of the same |
US6717045B2 (en) | 2001-10-23 | 2004-04-06 | Leon L. C. Chen | Photovoltaic array module design for solar electric power generation systems |
JP2003258291A (en) | 2001-12-27 | 2003-09-12 | Daido Steel Co Ltd | Light condensing photovoltaic power generator |
US7369735B2 (en) | 2002-02-15 | 2008-05-06 | Biosynergetics, Inc. | Apparatus for the collection and transmission of electromagnetic radiation |
US6959138B2 (en) * | 2002-05-17 | 2005-10-25 | Nanoventions, Inc. | Planar optical waveguide |
TW594108B (en) | 2002-06-24 | 2004-06-21 | Mitsubishi Rayon Co | Light source device and light deflection element |
JP4162935B2 (en) | 2002-07-04 | 2008-10-08 | 株式会社小糸製作所 | Vehicle lighting |
JP2004047220A (en) | 2002-07-10 | 2004-02-12 | Koito Mfg Co Ltd | Vehicular lighting fixture |
JP2004047753A (en) * | 2002-07-12 | 2004-02-12 | Bridgestone Corp | Solar cell with condensing element |
US20040022071A1 (en) * | 2002-08-02 | 2004-02-05 | Delta Electronic, Inc. | Optical energy collection system to provide economical light source |
KR100472468B1 (en) | 2002-08-07 | 2005-03-10 | 삼성전자주식회사 | Optical guide and image forming apparatus employing it |
EP1408362A1 (en) * | 2002-10-10 | 2004-04-14 | FER Fahrzeugelektrik GmbH | Lamp, in particular vehicle lamp |
DE10249113B4 (en) * | 2002-10-22 | 2010-04-08 | Odelo Gmbh | Vehicle lamp, in particular tail lamp, preferably for motor vehicles |
GB0227718D0 (en) * | 2002-11-28 | 2003-01-08 | Eastman Kodak Co | A photovoltaic device and a manufacturing method hereof |
US7377671B2 (en) * | 2003-02-04 | 2008-05-27 | Light Prescriptions Innovators, Llc | Etendue-squeezing illumination optics |
US7020364B2 (en) | 2003-03-31 | 2006-03-28 | Sioptical Inc. | Permanent light coupling arrangement and method for use with thin silicon optical waveguides |
US7976169B2 (en) * | 2003-05-14 | 2011-07-12 | Sun Innovations, Inc. | Waveguide display |
JP2007027150A (en) * | 2003-06-23 | 2007-02-01 | Hitachi Chem Co Ltd | Concentrating photovoltaic power generation system |
JP2005019587A (en) * | 2003-06-25 | 2005-01-20 | Kuraray Co Ltd | Natural lighting equipment and photovoltaic power generator |
US6966661B2 (en) * | 2003-09-16 | 2005-11-22 | Robert L. Read | Half-round total internal reflection magnifying prism |
JP2005123036A (en) | 2003-10-16 | 2005-05-12 | Takao Mori | Solar light condensing unit |
JP2005158362A (en) | 2003-11-21 | 2005-06-16 | Stanley Electric Co Ltd | Lighting fixture for vehicle |
CA2457266A1 (en) | 2004-02-11 | 2005-08-11 | Dbm Reflex Enterprises Inc. | Injection process for large-sized retroreflecting prisms |
JP4262113B2 (en) * | 2004-02-13 | 2009-05-13 | シチズン電子株式会社 | Backlight |
US20050185416A1 (en) | 2004-02-24 | 2005-08-25 | Eastman Kodak Company | Brightness enhancement film using light concentrator array |
CN101076744B (en) * | 2004-04-23 | 2010-05-12 | 光处方革新有限公司 | Optical manifold for light-emitting diodes |
TWI245931B (en) | 2004-05-07 | 2005-12-21 | Ace T Corp | Light guide panel whose structure is like a triangular prism |
US7160017B2 (en) * | 2004-06-03 | 2007-01-09 | Eastman Kodak Company | Brightness enhancement film using a linear arrangement of light concentrators |
FR2872256B1 (en) | 2004-06-24 | 2008-12-12 | Valeo Vision Sa | OPTICALLY GUIDED LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE |
US7083313B2 (en) | 2004-06-28 | 2006-08-01 | Whelen Engineering Company, Inc. | Side-emitting collimator |
EP2381278B1 (en) | 2004-07-27 | 2017-10-25 | Dolby Laboratories Licensing Corporation | Diffuser for light from light source array and displays incorporating same |
KR100677136B1 (en) * | 2004-09-25 | 2007-02-02 | 삼성전자주식회사 | Back light unit and liquid crystal display apparatus employing the same |
JP4155361B2 (en) * | 2004-09-27 | 2008-09-24 | 株式会社デュエラ | Sheet concentrator and solar cell sheet using the same |
US20060072222A1 (en) | 2004-10-05 | 2006-04-06 | Lichy Joseph I | Asymetric, three-dimensional, non-imaging, light concentrator |
DE502004003296D1 (en) * | 2004-10-28 | 2007-05-03 | Delphi Tech Inc | vehicle light |
MX2007007229A (en) | 2004-12-17 | 2007-08-22 | Universal Biosensors Pty Ltd | Electromagnetic radiation collector. |
US7298941B2 (en) | 2005-02-16 | 2007-11-20 | Applied Materials, Inc. | Optical coupling to IC chip |
WO2006088369A2 (en) | 2005-02-16 | 2006-08-24 | Stichting Voor De Technische Wetenschappen | Luminescent multilayer system and utilisation thereof |
JP4442767B2 (en) * | 2005-02-28 | 2010-03-31 | 株式会社エンプラス | Light guide plate, surface light source device including the light guide plate, and display device including the surface light source device |
US20060207650A1 (en) * | 2005-03-21 | 2006-09-21 | The Regents Of The University Of California | Multi-junction solar cells with an aplanatic imaging system and coupled non-imaging light concentrator |
US20080087323A1 (en) | 2005-05-09 | 2008-04-17 | Kenji Araki | Concentrator Solar Photovoltaic Power Generating Apparatus |
WO2006127100A1 (en) | 2005-05-26 | 2006-11-30 | Dow Corning Corporation | Process and silicone encapsulant composition for molding small shapes |
US20070095386A1 (en) | 2005-06-06 | 2007-05-03 | Solaria Corporation | Method and system for integrated solar cell using a plurality of photovoltaic regions |
JP4671344B2 (en) | 2005-08-03 | 2011-04-13 | シチズン電子株式会社 | Light guide plate and backlight device using the same |
WO2007020820A1 (en) * | 2005-08-12 | 2007-02-22 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device |
GB2431513B (en) | 2005-10-21 | 2008-06-04 | Imp College Innovations Ltd | Solar concentrators |
JP5178523B2 (en) * | 2005-11-14 | 2013-04-10 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Thin and highly efficient optical collimation device |
US20080184989A1 (en) | 2005-11-14 | 2008-08-07 | Mecham Travis W | Solar blackbody waveguide for high pressure and high temperature applications |
US7160010B1 (en) | 2005-11-15 | 2007-01-09 | Visteon Global Technologies, Inc. | Light manifold for automotive light module |
US7438454B2 (en) * | 2005-11-29 | 2008-10-21 | Visteon Global Technologies, Inc. | Light assembly for automotive lighting applications |
US7467879B2 (en) * | 2006-04-21 | 2008-12-23 | Xerox Corporation | Document illuminator with stepped optical element |
US20070246040A1 (en) | 2006-04-25 | 2007-10-25 | Applied Optical Materials | Wide angle solar concentrator |
US7855335B2 (en) | 2006-04-26 | 2010-12-21 | Palo Alto Research Center Incorporated | Beam integration for concentrating solar collector |
IL176618A0 (en) | 2006-06-29 | 2006-10-31 | Zalman Schwartzman | A solar cocentrating device for photovoltaic energy generation |
JP5295106B2 (en) | 2006-06-30 | 2013-09-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Device and method for controlling a lighting system with proximity detection of spotlight control device and spotlight control device |
CA2552023A1 (en) | 2006-07-14 | 2008-01-14 | Dbm Reflex Enterprises Inc. | Process for injecting lens plastic with non juxtaposed optical elements and/or retroreflecting prisms |
US20100307480A1 (en) | 2006-07-28 | 2010-12-09 | Angus Muir Edington Scrimgeour | Non-tracking solar collectors |
US20080048102A1 (en) | 2006-08-22 | 2008-02-28 | Eastman Kodak Company | Optically enhanced multi-spectral detector structure |
FR2905448B1 (en) | 2006-09-01 | 2015-05-01 | Valeo Vision | HIGH PERFORMANCE LIGHT GUIDE ASPECT LIGHTING OR SIGNALING DEVICE FOR VEHICLE. |
DE102006044603A1 (en) | 2006-09-19 | 2008-03-27 | Solar Dynamics Gmbh | Solar multi-stage concentrator |
EP2077586A4 (en) | 2006-10-24 | 2015-03-25 | Daido Steel Co Ltd | Concentrating photovoltaic apparatus |
US20080128016A1 (en) | 2006-11-08 | 2008-06-05 | Silicon Valley Solar, Inc. | Parallel Aperture Prismatic Light Concentrator |
WO2008072224A2 (en) | 2006-12-13 | 2008-06-19 | Pythagoras Solar Inc. | Solar radiation collector |
WO2008085957A2 (en) | 2007-01-10 | 2008-07-17 | Xtreme Energetics Inc. | Non-imaging facet based optics |
DE102007005091B4 (en) | 2007-02-01 | 2011-07-07 | Leonhard Kurz GmbH & Co. KG, 90763 | solar cell |
CN101641860A (en) | 2007-02-23 | 2010-02-03 | 加利福尼亚大学董事会 | Concentrating photovoltaic system using a fresnel lens and nonimaging secondary optics |
JP2008218018A (en) * | 2007-02-28 | 2008-09-18 | Sony Corp | Light source device and liquid-crystal display device |
EP2122268A4 (en) | 2007-03-14 | 2014-02-19 | Light Prescriptions Innovators | Optical concentrator, especially for solar photovoltaics |
US20080314436A1 (en) | 2007-03-30 | 2008-12-25 | O'connell Dan | Solar augmentation system |
FR2914754B1 (en) | 2007-04-05 | 2009-07-17 | Commissariat Energie Atomique | PLAN LIGHT CONCENTRATION DEVICE WITH REDUCED THICKNESS |
US20080257408A1 (en) | 2007-04-23 | 2008-10-23 | Atomic Energy Council - Institute Of Nuclear Energy Research | Solar light concentrator |
US20080264486A1 (en) | 2007-04-30 | 2008-10-30 | Xiaoyuan Chen | Guided-wave photovoltaic devices |
US9040808B2 (en) * | 2007-05-01 | 2015-05-26 | Morgan Solar Inc. | Light-guide solar panel and method of fabrication thereof |
US9337373B2 (en) | 2007-05-01 | 2016-05-10 | Morgan Solar Inc. | Light-guide solar module, method of fabrication thereof, and panel made therefrom |
CN101681949B (en) | 2007-05-01 | 2013-03-27 | 摩根阳光公司 | Light-guide solar panel and method of fabrication thereof |
EP2174070A2 (en) | 2007-06-25 | 2010-04-14 | Sunsense Ltd. | System and methods of utilizing solar energy |
US7724998B2 (en) | 2007-06-28 | 2010-05-25 | Draka Comteq B.V. | Coupling composition for optical fiber cables |
EP2009416A1 (en) | 2007-06-29 | 2008-12-31 | Interuniversitair Microelektronica Centrum Vzw | Optical probe |
CN101652606A (en) * | 2007-08-29 | 2010-02-17 | 夏普株式会社 | Light-emitting element and display unit having the same |
WO2009030037A1 (en) | 2007-09-07 | 2009-03-12 | Quadra Solar Corporation | Concentrated solar system |
US7672549B2 (en) | 2007-09-10 | 2010-03-02 | Banyan Energy, Inc. | Solar energy concentrator |
US8412010B2 (en) | 2007-09-10 | 2013-04-02 | Banyan Energy, Inc. | Compact optics for concentration and illumination systems |
CA2698284C (en) * | 2007-09-10 | 2013-06-25 | Banyan Energy, Inc. | Compact optics for concentration, aggregation and illumination of light energy |
US20100236601A1 (en) | 2007-09-26 | 2010-09-23 | Chikao Okamoto | Solar cell, concentrating photovoltaic power generation module, concentrating photovoltaic power generation unit and solar cell manufacturing method |
US8119905B2 (en) | 2007-11-03 | 2012-02-21 | Solfocus, Inc. | Combination non-imaging concentrator |
WO2009063416A2 (en) | 2007-11-13 | 2009-05-22 | Koninklijke Philips Electronics, N.V. | Thin and efficient collecting optics for solar system |
US20090126792A1 (en) | 2007-11-16 | 2009-05-21 | Qualcomm Incorporated | Thin film solar concentrator/collector |
JP5697986B2 (en) | 2007-12-10 | 2015-04-08 | パーカー ハネフィン コーポレイションParker Hannifin Corporation | Optical lens image stabilization system |
US20090165842A1 (en) | 2007-12-28 | 2009-07-02 | Mcdonald Mark | Solid concentrator with total internal secondary reflection |
WO2009129599A1 (en) | 2008-04-22 | 2009-10-29 | Mihai Grumazescu | Optical assembly for concentrating photovoltaics |
CA2726120A1 (en) | 2008-05-28 | 2009-12-23 | Qualcomm Mems Technologies, Inc. | Front light devices and methods of fabrication thereof |
EP2351107A1 (en) * | 2008-09-04 | 2011-08-03 | Morgan Solar Inc. | Staggered light collectors for concentrator solar panels |
US20100065120A1 (en) | 2008-09-12 | 2010-03-18 | Solfocus, Inc. | Encapsulant with Modified Refractive Index |
MX2011002993A (en) | 2008-09-19 | 2011-05-30 | Univ California | System and method for solar energy capture and related method of manufacturing. |
WO2010040053A1 (en) | 2008-10-02 | 2010-04-08 | Richard Morris Knox | Solar energy concentrator |
US20120024374A1 (en) | 2008-10-02 | 2012-02-02 | Raydyne Energy, Inc. | Solar energy concentrator |
ES2364665B1 (en) | 2008-11-12 | 2012-05-23 | Abengoa Solar New Technologies, S.A. | LIGHTING AND CONCENTRATION SYSTEM. |
US20100165495A1 (en) | 2008-12-29 | 2010-07-01 | Murtha R Michael | Collection optic for solar concentrating wedge |
US9105783B2 (en) * | 2009-01-26 | 2015-08-11 | The Aerospace Corporation | Holographic solar concentrator |
DE102009045033A1 (en) * | 2009-03-12 | 2010-10-07 | Georg-Simon-Ohm Hochschule für angewandte Wissenschaften Fachhochschule Nürnberg | Tracking unit for a solar collector |
WO2010124028A2 (en) | 2009-04-21 | 2010-10-28 | Vasylyev Sergiy V | Light collection and illumination systems employing planar waveguide |
TW201111167A (en) | 2009-05-08 | 2011-04-01 | Corning Inc | Glass articles with polymer overmolds and methods for forming the same |
EP2494387A2 (en) | 2009-10-26 | 2012-09-05 | 3M Innovative Properties Company | Fresnel lens |
US8137001B2 (en) | 2009-11-02 | 2012-03-20 | Harris Corporation | Repeatable optical waveguide interconnection including an index matching elastomeric solid layer and related methods |
KR101567764B1 (en) | 2009-11-25 | 2015-11-11 | 반얀 에너지, 인크 | Solar module construction |
US20110162712A1 (en) | 2010-01-07 | 2011-07-07 | Martin David Tillin | Non-tracked low concentration solar apparatus |
WO2011114240A2 (en) | 2010-03-19 | 2011-09-22 | Morgan Solar Inc. | Solar-light concentration apparatus |
US20120006382A1 (en) | 2010-06-07 | 2012-01-12 | Hypersolar, Inc. | Thin and flat solar collector-concentrator |
US8450603B2 (en) | 2010-08-16 | 2013-05-28 | Btpatent Llc | Solar cell concentrator |
WO2012047269A1 (en) | 2010-09-27 | 2012-04-12 | Banyan Energy, Inc. | Linear cell stringing |
US8328403B1 (en) * | 2012-03-21 | 2012-12-11 | Morgan Solar Inc. | Light guide illumination devices |
-
2008
- 2008-05-01 CN CN2008800143629A patent/CN101681949B/en not_active Expired - Fee Related
- 2008-05-01 JP JP2010504407A patent/JP5837746B2/en active Active
- 2008-05-01 KR KR1020097024905A patent/KR101487896B1/en active IP Right Grant
- 2008-05-01 US US12/597,648 patent/US8152339B2/en active Active
- 2008-05-01 US US12/113,705 patent/US7873257B2/en active Active
- 2008-05-01 EP EP08748249A patent/EP2174058A4/en not_active Ceased
- 2008-05-01 CA CA2685108A patent/CA2685108C/en active Active
- 2008-05-01 WO PCT/CA2008/000831 patent/WO2008131561A1/en active Application Filing
- 2008-05-01 EP EP08748233.7A patent/EP2153475B1/en active Active
- 2008-05-01 ES ES08748233.7T patent/ES2642209T3/en active Active
- 2008-05-01 EP EP14001744.3A patent/EP2767754A3/en not_active Withdrawn
- 2008-05-01 EP EP13164469.2A patent/EP2645426A1/en not_active Withdrawn
- 2008-05-01 CA CA2685103A patent/CA2685103C/en active Active
- 2008-05-01 WO PCT/CA2008/000847 patent/WO2008131566A1/en active Application Filing
- 2008-05-01 AU AU2008243623A patent/AU2008243623B2/en not_active Ceased
- 2008-05-01 CN CN200880014534.2A patent/CN101680631B/en active Active
-
2009
- 2009-10-27 IL IL201786A patent/IL201786A/en active IP Right Grant
-
2011
- 2011-01-17 US US13/007,910 patent/US7991261B2/en active Active
- 2011-02-16 US US13/028,957 patent/US20120019942A1/en not_active Abandoned
- 2011-02-16 US US13/028,976 patent/US20110310633A1/en not_active Abandoned
-
2013
- 2013-04-30 US US13/873,521 patent/US9335530B2/en active Active
-
2014
- 2014-02-26 JP JP2014035886A patent/JP2014160824A/en active Pending
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US20120092772A1 (en) * | 2009-05-14 | 2012-04-19 | Yair Salomon | Light collection system and method |
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WO2014146078A2 (en) | 2013-03-15 | 2014-09-18 | Morgan Solar Inc. | Sunlight concentrating and harvesting device |
US9920901B2 (en) | 2013-03-15 | 2018-03-20 | Cree, Inc. | LED lensing arrangement |
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US11128179B2 (en) | 2014-05-14 | 2021-09-21 | California Institute Of Technology | Large-scale space-based solar power station: power transmission using steerable beams |
US10340698B2 (en) | 2014-05-14 | 2019-07-02 | California Institute Of Technology | Large-scale space-based solar power station: packaging, deployment and stabilization of lightweight structures |
US20160376037A1 (en) | 2014-05-14 | 2016-12-29 | California Institute Of Technology | Large-Scale Space-Based Solar Power Station: Packaging, Deployment and Stabilization of Lightweight Structures |
WO2016007231A1 (en) * | 2014-05-30 | 2016-01-14 | Cree, Inc. | Optical components for luminaire |
US9632295B2 (en) | 2014-05-30 | 2017-04-25 | Cree, Inc. | Flood optic |
US11362228B2 (en) | 2014-06-02 | 2022-06-14 | California Institute Of Technology | Large-scale space-based solar power station: efficient power generation tiles |
WO2015187739A1 (en) * | 2014-06-02 | 2015-12-10 | California Institute Of Technology | Large-scale space-based solar power station: efficient power generation tiles |
WO2016049305A1 (en) * | 2014-09-24 | 2016-03-31 | Federal-Mogul Corporation | Waveguide for controlled light distribution |
US20160085017A1 (en) * | 2014-09-24 | 2016-03-24 | Federal-Mogul Corporation | Waveguide for controlled light distribution |
US10330845B2 (en) * | 2014-09-24 | 2019-06-25 | Rebo Lighting & Electronics, Llc | Waveguide for controlled light distribution |
US10696428B2 (en) | 2015-07-22 | 2020-06-30 | California Institute Of Technology | Large-area structures for compact packaging |
US10454565B2 (en) | 2015-08-10 | 2019-10-22 | California Institute Of Technology | Systems and methods for performing shape estimation using sun sensors in large-scale space-based solar power stations |
US10749593B2 (en) | 2015-08-10 | 2020-08-18 | California Institute Of Technology | Systems and methods for controlling supply voltages of stacked power amplifiers |
US10992253B2 (en) | 2015-08-10 | 2021-04-27 | California Institute Of Technology | Compactable power generation arrays |
US10283659B2 (en) | 2016-11-06 | 2019-05-07 | Jitsen Chang | Configurations for solar cells, solar panels, and solar panel systems |
US10490682B2 (en) | 2018-03-14 | 2019-11-26 | National Mechanical Group Corp. | Frame-less encapsulated photo-voltaic solar panel supporting solar cell modules encapsulated within multiple layers of optically-transparent epoxy-resin materials |
US10522700B2 (en) | 2018-03-14 | 2019-12-31 | National Mechanical Group Corp. | Frame-less encapsulated photo-voltaic (PV) solar power panel supporting solar cell modules encapsulated within optically-transparent epoxy-resin material coating a phenolic resin support sheet |
US10522701B2 (en) | 2018-03-14 | 2019-12-31 | National Mechanical Group Corp. | Solar power panel factory and process for manufacturing frame-less encapsulated photo-voltaic (PV) solar power panels by encapsulating solar cell modules within optically-transparent epoxy-resin material coating phenolic resin support sheets |
US10529880B2 (en) | 2018-03-14 | 2020-01-07 | National Mechanical Group Corp. | Solar power panel factory and process for manufacturing frame-less encapsulated photo-voltaic (PV) solar power panels by encapsulating solar cell modules on a phenolic sheet beneath a polycarbonate panel using optically transparent epoxy-resin material |
US11634240B2 (en) | 2018-07-17 | 2023-04-25 | California Institute Of Technology | Coilable thin-walled longerons and coilable structures implementing longerons and methods for their manufacture and coiling |
US11772826B2 (en) | 2018-10-31 | 2023-10-03 | California Institute Of Technology | Actively controlled spacecraft deployment mechanism |
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