CN102998801B - RGB (red, green and blue) light synthesizing device - Google Patents
RGB (red, green and blue) light synthesizing device Download PDFInfo
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- CN102998801B CN102998801B CN201110268113.6A CN201110268113A CN102998801B CN 102998801 B CN102998801 B CN 102998801B CN 201110268113 A CN201110268113 A CN 201110268113A CN 102998801 B CN102998801 B CN 102998801B
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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
Refer to Fig. 1, in existing projector in order to the light beam L1 ~ L3 of three kinds of different colours to be combined three color light synthesis devices 3 forming synthesis light beam L4, its by the first prism 51, second prism 52, prism 53 and the 4th prism 54 sequentially gluing formed.Wherein, the face of this first prism 51 and this second prism 52 gluing and this prism 53 and the face of the 4th prism 54 gluing plates and is provided with one deck and penetrates for the first color beam L1 and the second color beam L2, but reflect the optical film of tri-color beam L3; The face of this second prism 52 and this prism 53 gluing, the 4th prism 54 and the face of this first prism 51 gluing then plates and is provided with one deck and penetrates 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 reflect toward this second prism 52 direction; When the second color beam L2 injects the 4th prism 54, will be positioned on same path with the first color beam L1 through the 4th prism 54; When tri-color beam L3 injects this prism 53, will reflect toward this second prism 52 direction, and converge to be formed with the first color beam L1 and the second color beam L2 and synthesize light beam L4.
But, along with the progress of image science and technology, utilize projector to carry out bulletin, video signal, meeting or the people of ornamental film to get more and more, and carry and use for making projection function be more convenient for, the volume of projector and internals thereof is also reduced significantly, to meet the demand of desired miniaturization.And three above-mentioned color light synthesis devices 3 form with four prisms 51 ~ 54, not only there is larger volume, and these light beams L1 ~ L3 must inject this three color light synthesis device 3 by different directions, make in projector, to be also installed with corresponding space, and really effectively cannot reach the object of miniaturization.
Therefore, for improving above-mentioned shortcoming, refer to Fig. 2, for the U.S. discloses three color light synthesis devices 4 disclosed in No. 20070091449 patent " Method and apparatus for making an electromagnetic beam combiner ", it double-coloredly to form to double-colored lens 63 gluing to spectroscope 62 and parallelogram of spectroscope 61, second by with first, and this first double-colored plating on spectroscope 61 and the face of this lens 63 gluing is provided with confession the second color beam L2 and penetrates but reflect the optical film of the first color beam L1; This second double-colored then plating on spectroscope 62 and the face of this lens 63 gluing is provided with confession the first color beam L1 and the second color beam L2 and penetrates but reflect the optical film of tri-color beam L3.
By this, just combine after the light beam L1 ~ L3 of three kinds of different colours can be made to inject this three color light synthesis device 4 and form synthesis light beam L4, and utilize above-mentioned design can the overall volume of a little minimizing three color light synthesis device 4, and wherein two light beams L1, L3 can be made to stay the space of establishing with unidirectional this three color light synthesis device 4 of injecting to reduce correspondence in projector, and then reach the object of miniaturization.But, three above-mentioned color light synthesis devices 4 still must use three lens to reach photosynthetic object, and really effectively cannot reach the object reducing three color light synthesis device 4 volumes, therefore, the design of existing three color light synthesis devices 3,4 is 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, cannot the defect of effective reduced volume for three color light synthesis devices in prior art, a kind of three color light synthesis devices are provided, formed except synthesis light beam except the first color beam, the second color beam and tri-color beam being combined, also effectively can reach the object of miniaturization.
The technical scheme that the present invention adopts for its technical matters of solution is, provides a kind of three color light synthesis devices, includes the first lens and the second lens.Wherein, these first lens have 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 between this first plane of incidence and this second plane of incidence, there is an angle, its angle is 90 ° and cuts Brewster angle (Brewster's angle); In addition, on this first plane of incidence, plating is provided with the first spectro-film, penetrates, and reflect this second color beam person for this first color beam; On this light splitting surface, plating is provided with the second spectro-film, penetrates, and reflect this first color beam and this second color beam person for this tri-color beam; 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 the side of these the first lens relative to the mode of this light splitting surface with this penetration surface;
Utilize above-mentioned design, this first color beam is with this second plane of incidence parallel and the mode that incident angle is Brewster angle injects this first lens by this first plane of incidence, and from this first plane of incidence toward the direction of this light splitting surface refraction after, reflex to this exit facet in this light splitting surface;
This second color beam injects this first lens in the mode of this second plane of incidence vertical 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 with vertical 3rd plane of incidence and the mode parallel with this second color beam injects this second lens by the 3rd plane of incidence, and penetrated by this penetration surface and leave this second lens, inject in these first lens by this light splitting surface again, and after converging form this synthesis light beam with this first color beam and this second color beam, together leave this first lens by this exit facet.
By this, the present invention utilizes the design of two panels lens and plated film, and the incident angle of the first color beam is the mode of Brewster angle by cooperation, effectively can reach the object of miniaturization, and can reach the effect reducing cost of manufacture and the vertical tolerance of group in the lump.
Accompanying drawing explanation
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 device.
Fig. 4 discloses to reduce overall volume based on the architecture design of Fig. 3.
Fig. 5 is the structural drawing of second embodiment of the invention three color light synthesis device.
Embodiment
For can the present invention be illustrated more clearly in, hereby lifts preferred embodiment and coordinate accompanying drawing to be described in detail as follows.
Refer to Fig. 3, three color light synthesis devices 1 of the present invention first preferred embodiment form synthesis light beam L4 in order to the first color beam L1, the second color beam L2 and tri-color beam L3 to be combined.In the present embodiment, this first color beam L1 is green beam, this second color beam L2 is blue light beam and this tri-color beam L3 is red beam, but not as limit.This three color light synthesis device 1 includes the first lens 10 and the second lens 20 be manufactured from the same material.In the present embodiment, these first lens 10 are all sheet glass with these second lens 20, but not as limit, wherein:
These first lens 10 have first plane of incidence 11, second plane of incidence 12, light splitting surface 13 and exit facet 14.This first plane of incidence 11 is parallel with this light splitting surface 13, this second plane of incidence 12 is parallel with this exit facet 14, and has 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 respectively and be 90 ° and cut Brewster angle θ
bangle.
In addition, on this first plane of incidence 11, plating is provided with the first spectro-film, penetrates, and reflect this second color beam L2 for this first color beam L1; On this light splitting surface 13, plating is provided with the second spectro-film, penetrates, and reflect this first color beam L1 and this second color beam L2 for this tri-color beam L3.
These second lens 20 have the 3rd plane of incidence 21 and penetration surface 22, and have angle and be 90 ° and cut Brewster angle θ equally between the 3rd plane of incidence 21 with this penetration surface 22
bangle.These second lens 20 are arranged at the side of these the first lens 10 in the mode that the relative gluing of this penetration surface 22 is engaged in this light splitting surface 13, and make the 3rd plane of incidence 21 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, by this first color beam L1 with this second plane of incidence 12 parallel and incident angle for Brewster angle θ
bmode inject this first lens 10 by this first plane of incidence 11, and from this first plane of incidence 11 toward the direction of this light splitting surface 13 refraction after, reflex to this exit facet 14 in this light splitting surface 13.
This second color beam L2 then therefore this second plane of incidence 12 vertical inject this first lens 10 with the mode of this first color beam L1 by this second plane of incidence 12, and in this first plane of incidence 11 with after reflexing to this light splitting surface 13 with the mode of this first color beam L1 same paths, be same as this light splitting surface 13 with this first color beam L1 mono-and reflex to this exit facet 14.
This tri-color beam L3 is with vertical 3rd plane of incidence 21 and the mode parallel with this second color beam L2 injects this second lens 20 by the 3rd plane of incidence 21, and penetrated by this penetration surface 22 and leave this second lens 20, inject in these first lens 10 by this light splitting surface 13 again, and converge with this first color beam L1 and this second color beam L2 the object reaching and form this synthesis light beam L4 in this light splitting surface 13, and leave this first lens 10 in the mode of this exit facet 14 vertical by this exit facet 14.
By this, utilize the mode of above-mentioned two panels lens 10,20 and plated film, and the incident angle of the first color beam L1 is Brewster angle θ by restriction
b, effectively can reach miniaturization and photosynthetic object.
In addition, for more effectively reaching the object of miniaturization, refer to Fig. 4, under the condition not affecting light compositing operation, more can by these first lens 10 of above-described embodiment and the specific corner excision of this second lens 20, and make the overall volume of three color light synthesis devices more small and exquisite.
Moreover refer to Fig. 5, three color light synthesis devices 2 of the present invention second preferred embodiment include the first lens 30 and the second lens 40 equally.Wherein, the plated film of these first lens 30 and first lens 10 of above-described embodiment and identical first plane of incidence 31, second plane of incidence 32 of angle design, 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 this second lens 41 difference is that this penetration surface 42 of these the second lens 40 is separated with this light splitting surface 33, and on this penetration surface 42, plating is provided with the anti-reflective film that can improve this tri-color beam L3 penetrance.
By this, utilize above-mentioned design, by this first color beam L1, this the second color beam L2 and this tri-color beam L3 injects this first plane of incidence 31 respectively with the method described in 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, first can be penetrated by this penetration surface 42 and leave these second lens 40 and produce first time refraction, and inject generation second time refraction in these first lens 30 by this light splitting surface 33, converge with this first color beam L1 and this second color beam L2 again and form this synthesis light beam L4 and together leave this first lens 30 in the mode of this exit facet 34 vertical by this exit facet 34.
Therefore, can be learnt by above-mentioned explanation, utilize the design of above-mentioned two panels lens 30,40 and plated film, and be defined as Brewster angle θ with the incident angle of this first color beam L1 equally
bmethod, engage without gluing that these first lens 30 are same with these second lens 40 can reach miniaturization and photosynthetic object effectively.
In addition, the design of above-mentioned various embodiment, except reaching except the object of miniaturization, because it only needs utilize two panels lens and can reach photosynthetic object, and can reach the effect reducing cost of manufacture and the vertical tolerance of group in the lump.
The foregoing is only the better possible embodiments of the present invention, such as apply equivalent structure and method for making change that instructions of the present invention and claim do, ought to be included in the scope of the claims of the present invention.
Claims (9)
1. three color light synthesis devices, form synthesis light beam in order to the first color beam, the second color beam and tri-color beam to be combined, it is characterized in that, this three color light synthesis device includes:
First lens, have 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, on this first plane of incidence, plating is provided with the first spectro-film, penetrates, and reflect this second color beam for this first color beam; On this light splitting surface, plating is provided with the second spectro-film, penetrates, and reflect this first color beam and this second color beam for this tri-color beam; And
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 the side of these the first lens relative to the mode of this light splitting surface with this penetration surface;
This first color beam is with this second plane of incidence parallel and the mode that incident angle is Brewster angle injects this first lens by this first plane of incidence, and from this first plane of incidence toward the direction of this light splitting surface refraction after, reflex to this exit facet in this light splitting surface;
This second color beam injects this first lens in the mode of this second plane of incidence vertical 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 with vertical 3rd plane of incidence and the mode parallel with this second color beam injects this second lens by the 3rd plane of incidence, and penetrated by this penetration surface and leave this second lens, inject in these first lens by this light splitting surface again, and after converging form this synthesis light beam with this first color beam and this second color beam, 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 these the 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, these first lens are separated with these second lens, and on the penetration surface of these the second lens, plating is provided with one deck anti-reflective film layer.
4. three color light synthesis devices as claimed in claim 1, is characterized in that, second plane of incidence of these the first lens is parallel with this exit facet, and has 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 synthesis 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 second plane of incidence of these the first lens 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 cutting Brewster angle.
8. three color light synthesis devices as claimed in claim 1, is characterized in that, these first lens are 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 CN102998801A (en) | 2013-03-27 |
| CN102998801B true 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 (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100609060B1 (en) * | 1999-07-21 | 2006-08-09 | 삼성전자주식회사 | Polarization Separating And Converting Glass Of Projection Display Unit |
-
2011
- 2011-09-09 CN CN201110268113.6A patent/CN102998801B/en active Active
Patent Citations (5)
| 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 |
| 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 |
|---|---|
| CN102998801A (en) | 2013-03-27 |
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