CN102998801A - RGB (red, green and blue) light synthesizing device - Google Patents
RGB (red, green and blue) light synthesizing device Download PDFInfo
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- CN102998801A CN102998801A CN2011102681136A CN201110268113A CN102998801A CN 102998801 A CN102998801 A CN 102998801A CN 2011102681136 A CN2011102681136 A CN 2011102681136A CN 201110268113 A CN201110268113 A CN 201110268113A CN 102998801 A CN102998801 A CN 102998801A
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Abstract
The invention relates to an RGB (red, green and blue) light synthesizing device comprising a first lens and a second lens. The first lens is provided with a first incidence side, a second incidence side, a light splitting side and an emitting side, the first incidence side is parallel to the light splitting side, an included angle in degrees gotten by subtracting Brewster angle from 90 degrees is formed between the first incidence side and the second incidence side, a first light splitting film for a first color light beam to penetrate and capable of reflecting a second color light beam is plated on the first incidence side, and a second light splitting film for a third color light beam to penetrate and capable of reflecting the first color light beam and the second color light beam is plated on the light splitting side. The second lens is provided with a third incidence side and a penetrating side, and the second lens is arranged on one side of the first lens in a manner that the penetrating side is opposite to the light splitting side. When the first color light beam is emitted into the first incidence side by the Brewster angle as incidence angle, the second color light beam and the third color light beam are emitted into the second incidence side and the third incidence side by being perpendicular to the first color light beam, the light beams are converged on the light splitting side to form a synthesis light beam to be emitted from the emitting side.
Description
Technical field
The present invention is relevant with optical devices, in more detail refers to a kind of three color light synthesis devices.
Background technology
See also Fig. 1, in the existing projector in order to the light beam L1～L3 of three kinds of different colours in conjunction with three color light synthesis devices 3 that form synthetic light beam L4, its by the first prism 51, the second prism 52, prism 53 and the 4th prism 54 sequentially gluing formed.Wherein, plating is provided with one deck and penetrates for the first color beam L1 and the second color beam L2 on the face of the face of this first prism 51 and these the second prism 52 gluings and this prism 53 and the 4th prism 54 gluings, but reflects the optical film of tri-color beam L3; On the face of the face of this second prism 52 and these prism 53 gluings, the 4th prism 54 and these the first prism 51 gluings then plating be provided with one deck and penetrate for the second color beam L2 and tri-color beam L3, but reflect the optical film of the first color beam L1.
By this, when the first color beam L1 injects this first prism 51, will be toward this second prism 52 directions reflection; When the second color beam L2 injects the 4th prism 54, will pass the 4th prism 54 and be positioned on the same path with the first color beam L1; When tri-color beam L3 injects this prism 53, will reflect toward these the second prism 52 directions, and converge the synthetic light beam L4 of formation with the first color beam L1 and the second look L2 light beam.
Yet, progress along with image science and technology, the people who utilizes projector to carry out bulletin, video signal, meeting or ornamental film gets more and more, and be more convenient for carrying and use for making the projection function, the volume of projector and internals thereof is also dwindled significantly, to satisfy the demand of desired miniaturization.And three above-mentioned color light synthesis devices 3 form with four prisms 51～54, not only has larger volume, and these light beams L1～L3 must inject this three color light synthesis device 3 by different directions, so that also must be installed with corresponding space in the projector, and can't really effectively reach the purpose of miniaturization.
Therefore, for improving above-mentioned shortcoming, see also Fig. 2, three color light synthesis devices 4 that disclose in No. 20070091449 patent " Method and apparatus for making an electromagnetic beam combiner " are disclosed for the U.S., its by with first double-coloredly form to spectroscope 61, the second double-colored lens 63 gluings to spectroscope 62 and parallelogram, and this first double-colored on the face of spectroscope 61 and these lens 63 gluings plating be provided with and penetrate for the second color beam L2 but reflect the optical film of the first color beam L1; This second double-colored on the face of spectroscope 62 and these lens 63 gluings then plating be provided with and penetrate for the first color beam L1 and the second color beam L2 but reflect the optical film of tri-color beam L3.
By this, just can make the light beam L1～L3 of three kinds of different colours inject the synthetic light beam L4 of these three color light synthesis devices, 4 rear combination formation, and utilize the overall volume that above-mentioned design can a little minimizing three color light synthesis devices 4, and can make wherein two light beam L1, L3 corresponding in the projector stay the space of establishing with unidirectional this three color light synthesis device 4 of injecting to reduce, and then reach the purpose of miniaturization.Yet, three above-mentioned color light synthesis devices 4 still must reach photosynthetic purpose with three lens, and can't really effectively reach the purpose of dwindling three color light synthesis devices, 4 volumes, therefore, existing three color light synthesis devices 3,4 design are not discriminated perfect yet, and the part that still haves much room for improvement.
Summary of the invention
The technical problem to be solved in the present invention is, for the effective defective of reduced volume of three color light synthesis devices in the prior art, a kind of three color light synthesis devices are provided, except can with the first color beam, the second color beam and tri-color beam in conjunction with forming the synthetic light beam, also can effectively reaching the purpose of miniaturization.
The present invention is that the technical scheme that its technical matters of solution adopts is, a kind of three color light synthesis devices are provided, and includes first lens and the second lens.Wherein, this first lens has first plane of incidence, second plane of incidence, light splitting surface and exit facet, wherein, this first plane of incidence is parallel with this light splitting surface, and have an angle between this first plane of incidence and this second plane of incidence, its angle is 90 ° and cuts Brewster angle (Brewster ' s angle); In addition, plating is provided with the first spectro-film on this first plane of incidence, penetrates for this first color beam, and reflects this second color beam person; Plating is provided with the second spectro-film on this light splitting surface, penetrates for this tri-color beam, and reflects this first color beam and this second color beam person; These second lens have the 3rd plane of incidence and penetration surface, and the 3rd plane of incidence is parallel with this exit facet, and this penetration surface is parallel with this first plane of incidence; In addition, these second lens are arranged at a side of this first lens with respect to the mode of this light splitting surface with this penetration surface;
Utilize above-mentioned design, this first color beam is injected this first lens take parallel this second plane of incidence and incident angle as the mode of Brewster angle by this first plane of incidence, and by this first plane of incidence after the refraction of the direction of this light splitting surface, reflex to this exit facet in this light splitting surface;
This second color beam is injected this first lens in the mode of vertical this second plane of incidence and this first color beam by this second plane of incidence, and after the mode of this first plane of incidence and this first color beam same paths reflexes to this light splitting surface, be same as this light splitting surface with this first color beam one and reflex to this exit facet;
This tri-color beam is injected this second lens with vertical the 3rd plane of incidence and the mode parallel with this second color beam by the 3rd plane of incidence, and penetrated by this penetration surface and to leave this second lens, injected in this first lens by this light splitting surface again, and with this first color beam and this second light beam transmission converge formation should synthetic light beam after, together leave this first lens by this exit facet.
By this, the present invention utilizes the design of two lens and plated film, and to cooperate the incident angle with the first color beam be the mode of Brewster angle, can effectively reach the purpose of miniaturization, and can reach in the lump the effect that reduces cost of manufacture and the vertical tolerance of group.
Description of drawings
Fig. 1 is the structural drawing of existing three color light synthesis devices.
Fig. 2 is the structural drawing of another existing three color light synthesis devices.
Fig. 3 is the structural drawing of first embodiment of the invention three color light synthesis devices.
Fig. 4 reduces overall volume take the architecture design of Fig. 3 as the basis for disclosing.
Fig. 5 is the structural drawing of second embodiment of the invention three color light synthesis devices.
Embodiment
For being illustrated more clearly in the present invention, hereby lifting preferred embodiment and cooperate accompanying drawing to be described in detail as follows.
See also Fig. 3, three color light synthesis devices 1 of the present invention's the first preferred embodiment are in order to synthesize light beam L4 with the first color beam L1, the second color beam L2 and tri-color beam L3 in conjunction with forming.In the present embodiment, this first color beam L1 is that green beam, this second color beam L2 are blue light beam and this tri-color beam L3 is red beam, but not as limit.This three color light synthesis device 1 includes first lens 10 and the second lens 20 that are manufactured from the same material.In the present embodiment, this first lens 10 is all sheet glass with these second lens 20, but not as limit, wherein:
This first lens 10 has first plane of incidence 11, second plane of incidence 12, light splitting surface 13 and exit facet 14.This first plane of incidence 11 and this light splitting surface are 13 parallel, this second plane of incidence 12 is parallel with this exit facet 14, and have respectively angle between this first plane of incidence 11 and this second plane of incidence 12 and between this light splitting surface 13 and this exit facet 14 and be 90 ° and cut Brewster angle θ
BAngle.
In addition, plating is provided with the first spectro-film on this first plane of incidence 11, penetrates for this first color beam L1, and reflects this second color beam L2; Plating is provided with the second spectro-film on this light splitting surface 13, penetrates for this tri-color beam L3, and reflects this first color beam L1 and this second color beam L2.
These second lens 20 have the 3rd plane of incidence 21 and penetration surface 22, and have equally angle between the 3rd plane of incidence 21 and this penetration surface 22 and be 90 ° and cut Brewster angle θ
BAngle.The mode that these second lens 20 are engaged in this light splitting surface 13 with these penetration surface 22 relative gluings is arranged at a side of this first lens 10, and so that the 3rd plane of incidence 21 is parallel with this exit facet 14, and this penetration surface 22 is parallel with this first plane of incidence 11.
By this, utilize above-mentioned design, with this first color beam L1 take parallel this second plane of incidence 12 and incident angle as Brewster angle θ
BMode inject this first lens 10 by this first plane of incidence 11, and by this first plane of incidence 11 after the refraction of the direction of this light splitting surface 13, reflex to this exit facet 14 in this light splitting surface 13.
This second color beam L2 then therefore vertical this second plane of incidence 12 inject this first lens 10 with the mode of this first color beam L1 by this second plane of incidence 12, and after this first plane of incidence 11 reflexes to this light splitting surface 13 in the mode with this first color beam L1 same paths, be same as this light splitting surface 13 with this first color beam L1 one and reflex to this exit facet 14.
This tri-color beam L3 injects this second lens 20 with vertical the 3rd plane of incidence 21 and the mode parallel with this second color beam L2 by the 3rd plane of incidence 21, and penetrated by this penetration surface 22 and to leave this second lens 20, injected in this first lens 10 by this light splitting surface 13 again, and converge in this light splitting surface 13 and this first color beam L1 and this second light beam transmission L2 and to reach the purpose that forms this synthetic light beam L4, and leave this first lens 10 in the mode of vertical this exit facet 14 by this exit facet 14.
By this, utilize above-mentioned two lens 10,20 and the mode of plated film, and the incident angle that limits the first color beam L1 is Brewster angle θ
B, can effectively reach miniaturization and photosynthetic purpose.
In addition, for more effectively reaching the purpose of miniaturization, see also Fig. 4, under the condition that does not affect the light compositing operation, more this first lens 10 and this second lens 20 specific corners of above-described embodiment can be excised, and so that the overall volume of three color light synthesis devices is more small and exquisite.
Moreover, seeing also Fig. 5, three color light synthesis devices 2 of the present invention's the second preferred embodiment include first lens 30 and the second lens 40 equally.Wherein, first plane of incidence 31, second plane of incidence 32 that the plated film of this first lens 30 and the first lens 10 of above-described embodiment and angle design are identical, light splitting surface 33 and exit facet 44 repeat no more in this appearance.These second lens 40 have the 3rd plane of incidence 41 and penetration surface 42 equally, and these the second lens 41 differences are that this penetration surface 42 of these the second lens 40 separates with this light splitting surface 33, and plating is provided with the anti-reflective film that can improve this tri-color beam L3 penetrance on this penetration surface 42.
By this, utilize above-mentioned design, with this first color beam L1, this the second color beam L2 and this tri-color beam L3 inject respectively this first plane of incidence 31 with the described method of the first embodiment, this second plane of incidence 32 and the 3rd plane of incidence 41, and after the light path of these light beams L1～L3 and above-described embodiment difference be that this tri-color beam L3 injects these second lens 40, can be penetrated by this penetration surface 42 first and leave this for the first time refraction of second lens, 40 generations, and injected in this first lens 30 by this light splitting surface 33 and to produce for the second time refraction, converge this synthetic light beam L4 of formation with this first color beam L1 and this second light beam transmission L2 again and together leave this first lens 30 in the mode of vertical this exit facet 34 by this exit facet 34.
Therefore, can be learnt by above-mentioned explanation, utilize above-mentioned two lens 30,40 and the design of plated film, and be defined as Brewster angle θ with the incident angle of this first color beam L1 equally
BMethod, engage this first lens 30 without gluing and can effectively reach miniaturization and photosynthetic purpose equally with these second lens 40.
In addition, the design of above-mentioned various embodiments except the purpose that can reach miniaturization, because it only need utilize two lens and can reach photosynthetic purpose, and can reach the effect that reduces cost of manufacture and the vertical tolerance of group in the lump.
The above only is the better possible embodiments of the present invention, such as uses equivalent structure and method for making variation that instructions of the present invention and claim are done, ought to be included in the claim of the present invention.
Claims (9)
1. a color light synthesis device in order to the first color beam, the second color beam and tri-color beam are synthesized light beam in conjunction with forming, is characterized in that, this three color light synthesis device includes:
First lens has first plane of incidence, second plane of incidence, light splitting surface and exit facet, and wherein, this first plane of incidence is parallel with this light splitting surface, and has angle between this first plane of incidence and this second plane of incidence, and its angle is 90 ° and cuts Brewster angle; In addition, plating is provided with the first spectro-film on this first plane of incidence, penetrates for this first color beam, and reflects this second color beam person; Plating is provided with the second spectro-film on this light splitting surface, penetrates for this tri-color beam, and reflects this first color beam and this second color beam; And
The second lens have the 3rd plane of incidence and penetration surface, and the 3rd plane of incidence is parallel with this exit facet, and this penetration surface is parallel with this first plane of incidence; In addition, these second lens are arranged at a side of this first lens with respect to the mode of this light splitting surface with this penetration surface;
This first color beam is injected this first lens take parallel this second plane of incidence and incident angle as the mode of Brewster angle by this first plane of incidence, and by this first plane of incidence after the direction refraction of this light splitting surface, reflex to this exit facet in this light splitting surface;
This second color beam is injected this first lens in the mode of vertical this second plane of incidence and this first color beam by this second plane of incidence, and after the mode of this first plane of incidence and this first color beam same paths reflexes to this light splitting surface, be same as this light splitting surface with this first color beam one and reflex to this exit facet;
This tri-color beam is injected this second lens with vertical the 3rd plane of incidence and the mode parallel with this second color beam by the 3rd plane of incidence, and penetrated by this penetration surface and to leave this second lens, injected in this first lens by this light splitting surface again, and with this first color beam and this second light beam transmission converge formation should synthetic light beam after, together leave this first lens by this exit facet.
2. three color light synthesis devices as claimed in claim 1 is characterized in that, this light splitting surface of this first lens engages with the penetration surface gluing of these the second lens.
3. three color light synthesis devices as claimed in claim 1 is characterized in that, this first lens separates with these second lens, and plating is provided with one deck antireflection rete on the penetration surface of these the second lens.
4. three color light synthesis devices as claimed in claim 1 is characterized in that, second plane of incidence of this first lens is parallel with this exit facet, and have an angle between this exit facet and this light splitting surface, and its angle is 90 ° and cuts Brewster angle.
5. three color light synthesis devices as claimed in claim 4 is characterized in that, this synthetic light beam leaves this first lens in the mode vertical with this exit facet by this exit facet.
6. three color light synthesis devices as claimed in claim 1 is characterized in that, this of this first lens second plane of incidence is parallel with this exit facet.
7. three color light synthesis devices as claimed in claim 6 is characterized in that, having angle between the 3rd plane of incidence of these the second lens and this penetration surface is 90 ° of angles that cut Brewster angle.
8. three color light synthesis devices as claimed in claim 1 is characterized in that, this first lens is sheet glass.
9. three color light synthesis devices as claimed in claim 1 is characterized in that, these second lens are sheet glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110268113.6A CN102998801B (en) | 2011-09-09 | 2011-09-09 | RGB (red, green and blue) light synthesizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110268113.6A CN102998801B (en) | 2011-09-09 | 2011-09-09 | RGB (red, green and blue) light synthesizing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102998801A true CN102998801A (en) | 2013-03-27 |
| CN102998801B CN102998801B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110268113.6A Active CN102998801B (en) | 2011-09-09 | 2011-09-09 | RGB (red, green and blue) light synthesizing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5959773A (en) * | 1997-08-20 | 1999-09-28 | Hughes-Jvc Technology Corporation | Parallel plate beam splitter configuration in high index glass |
| JP2001042129A (en) * | 1999-07-21 | 2001-02-16 | Samsung Electronics Co Ltd | Polarization converting element of projection type display device |
| EP1276000A2 (en) * | 2001-06-29 | 2003-01-15 | Canon Kabushiki Kaisha | Polarisation beam splitter and method of producing the same |
| CN1463376A (en) * | 2001-06-22 | 2003-12-24 | 精工爱普生株工会社 | Illumination opitcal system and projector |
| TW200813482A (en) * | 2006-07-04 | 2008-03-16 | Lg Electronics Inc | Projection system |
| CN101162296A (en) * | 2007-09-24 | 2008-04-16 | 昂纳明达数字显示技术（深圳）有限公司 | Polarization light splitter and LCOS LCD stereo projection system using the same |
-
2011
- 2011-09-09 CN CN201110268113.6A patent/CN102998801B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5959773A (en) * | 1997-08-20 | 1999-09-28 | Hughes-Jvc Technology Corporation | Parallel plate beam splitter configuration in high index glass |
| JP2001042129A (en) * | 1999-07-21 | 2001-02-16 | Samsung Electronics Co Ltd | Polarization converting element of projection type display device |
| CN1463376A (en) * | 2001-06-22 | 2003-12-24 | 精工爱普生株工会社 | Illumination opitcal system and projector |
| EP1276000A2 (en) * | 2001-06-29 | 2003-01-15 | Canon Kabushiki Kaisha | Polarisation beam splitter and method of producing the same |
| TW200813482A (en) * | 2006-07-04 | 2008-03-16 | Lg Electronics Inc | Projection system |
| CN101162296A (en) * | 2007-09-24 | 2008-04-16 | 昂纳明达数字显示技术（深圳）有限公司 | Polarization light splitter and LCOS LCD stereo projection system using the same |
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| Publication number | Publication date |
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| CN102998801B (en) | 2015-04-22 |
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