CN2515687Y - Colour splitting colour-synthesizing prism - Google Patents
Colour splitting colour-synthesizing prism Download PDFInfo
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- CN2515687Y CN2515687Y CN 01279603 CN01279603U CN2515687Y CN 2515687 Y CN2515687 Y CN 2515687Y CN 01279603 CN01279603 CN 01279603 CN 01279603 U CN01279603 U CN 01279603U CN 2515687 Y CN2515687 Y CN 2515687Y
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Abstract
The utility model relates to a color separation and color combination prism, comprising a green color separation wave plate, a trapezoid prism, a triangular prism and a compensation triangular prism. A polarization spectroscopic film is plated between the trapezoid prism and the triangular prism. A reverse red blue film is plated between the triangular prism and the compensation triangular prism. The angle of the oblique plane between the triangular prism and the compensation triangular prism is 45 degrees to 48 degrees. The utility model reduces the number of the prism, and makes the contact surfaces among different mediums reduced to 3, which improves the light energy utilizing rate by 15 to 20 percent; and the utility model reduces the number of the color separation wave plate, which reduces the manufacturing cost of the color separation and color combination prism by 20 to 30 percent.
Description
Technical field
The utility model relates to a kind of color-separation and color-recombination prism, belongs to the projection mechanism technical field, is the core component and the state-of-the-art technology of liquid crystal on silicon (LiquidCrystal on Silicon is hereinafter to be referred as LCOS) optical system.
Background technology
At present, in liquid crystal on silicon optical system color-separation and color-recombination optics mechanism, mainly contain two kinds of representational structures.
The first kind is to be the color-separation and color-recombination parts of 4 polarization splitting prisms of representative with Fig. 1.It mainly is made up of 2 blocks of green color separation wave plates 1 and 5,2 blocks of red color separation wave plates 2 and 3 and 4 polarization splitting prisms 4.The shortcoming of this kind structure is that the color separation wave plate quantity that adopts is many, and the color separation wave plate is the patented technology of U.S. Colorlink company, costs an arm and a leg, and as the core component of liquid crystal on silicon light projection system, its price is wayward.And the surface of contact of 8 different boundaries matter has weakened the efficiency of light energy utilization greatly in the whole optical path process.
Second class is to be that the L type of representative divides the actinic light parts with Fig. 2.It mainly is popular in blue prism 7 and forms by two green sub wave plate 1 and 5,1 polarization splitting prisms 4 (PBS), 1 block compensation glass square glass prism 6 and 1 are counter.This structure and above-mentioned first kind color-separation and color-recombination parts are relatively, advantage is that the number of prisms that adopts is few, the color separation wave plate quantity of using can reduce by half, surface of contact between the different boundaries matter reduces to 6, and these 6 surface of contact are the surface of contact of 2 green sub wave plate and polarization splitting prism, the surface of contact of polarization spectro plated film face, polarization splitting prism and compensation glass square glass prism in the polarization splitting prism, polarization splitting prism and the anti-surface of contact that is popular in blue prism, instead be popular in counter in the blue prism and be popular in blue face.Its shortcoming is that surface of contact is too much, and the efficiency of light energy utilization is not high.
Summary of the invention
The purpose of this utility model is a kind of color-separation and color-recombination prism of design, changes the structure of prior art, to improve the efficiency of light energy utilization of liquid crystal on silicon projection machine optical system core component, simplifies technology, reduces cost.
The color-separation and color-recombination prism of the utility model design comprises green color separation wave plate, Dove prism, triangular prism and compensation triangular prism; Be coated with polarization beam splitter between described Dove prism and the triangular prism; Be coated with the anti-blue film that is popular between triangular prism and the compensation triangular prism, the bevel angle between triangular prism and the compensation triangular prism is 45 °-48 °.
The color-separation and color-recombination prism of the utility model design has reduced number of prisms, and has made the surface of contact between the different boundaries matter reduce to 3, makes the efficiency of light energy utilization improve 15～20%; Reduced the use of branch wave plate, made the cost of color-separation and color-recombination prism descend 20～30%.
Description of drawings
Fig. 1 is the structural representation of the color-separation and color-recombination parts of four polarization splitting prisms compositions in the prior art.。
Fig. 2 is the structural representation of the L type color-separation and color-recombination parts in the prior art.
Fig. 3 is the prism structures synoptic diagram of the color-separation and color-recombination parts of the utility model design.
Among Fig. 1～Fig. 3: 1 is the first green color separation wave plate, and 2 is first red color separation wave plates, and 3 is second red color separation wave plates, the 4th, polarization splitting prism, 5 is second green color separation wave plates, the 6th, the compensation glass square glass prism, the 7th, anti-blue prism, the 8th, Dove prism, the 9th, the triangular prism of being popular in, the 10th, the compensation triangular prism, 11a is a green liquid crystal on silicon plate, and 11b is a red road liquid crystal on silicon plate, the blue road of 11c liquid crystal on silicon plate, the 12nd, polarization beam splitter, the 13rd, instead be popular in blue film.
Embodiment
As shown in Figure 3, an embodiment of the color-separation and color-recombination prism of the utility model design comprises green color separation wave plate 1, Dove prism 8, triangular prism 9 and compensation triangular prism 10.Be coated with polarization beam splitter 12 between Dove prism 8 and the triangular prism 9; Be coated with the anti-blue film 13 that is popular between triangular prism 9 and the compensation triangular prism 10, the bevel angle between triangular prism and the compensation triangular prism is 47.5 °.
The color-separation and color-recombination prism of the utility model design has been drawn the L type and has been divided the advantage of photosynthetic photosystem parts, and made significant improvement.The color-separation and color-recombination prism structures is made up of green color separation wave plate, Dove prism, triangular prism and a compensation triangular prism.
Divide photosynthetic photosystem parts to compare with the L type, the prism structures advantage of the utility model design is: adopt 1,
With number of prisms few
In these parts, adopt three prisms altogether.Wherein the surface of contact between Dove prism and the compensation triangular prism plates polarization beam splitter; Surface of contact between triangular prism and the compensation triangular prism plates the anti-blue film that is popular in.Can reduce the cold worked quantity of parts glass.
1, the surface of contact of different boundary matter is few
Divide photosynthetic photosystem parts to compare with the L type, the surface of contact between the different boundaries matter reduces to 3: the surface of contact between the surface of contact between the surface of contact between green sub wave plate and the triangular prism, Dove prism and the triangular prism, triangular prism and the compensation triangular prism.
2, efficiency of light energy utilization height
Because the number of prisms of prism structures is few, and the surface of contact of different boundaries matter is few, the parts of this structure are compared the L type and are divided the photosynthetic photosystem parts efficiency of light energy utilization to improve 15～20%.Owing to only adopt a green sub wave plate, price also can reduce by 20～30%.
The index path of the prism structures of color-separation and color-recombination parts as shown in Figure 3.The polarized light P light that illuminator is come out, through being divided into two parts after the green sub wave plate 1:
1, the polarization direction of green glow has been rotated 90 degree and has become S light, after green S light after being rotated runs into polarization beam splitter 12 (effect of PBS is the saturating P light of anti-S light) between Dove prism and the triangular prism, be reflected onto in the Dove prism 8, until the bright green liquid crystal on silicon of green S illumination plate 11a.The green glow that reflects from green liquid crystal on silicon plate 11a has become the P polarization direction, sees through above-mentioned PBS film.
2, purple light still keeps the P polarization direction.And the purple light of P polarization direction is running into the anti-two parts that are divided into after being popular in blue film 13:
A, reflection to red light, its polarization direction is constant.Illuminate red road liquid crystal on silicon plate 11b.The polarization direction of the ruddiness that reflects from red road liquid crystal on silicon plate has been changed 90 degree, becomes red S light.Red S light meets to state and instead is reflected after being popular in blue film, and the polarization direction is constant, and red S light is reflected after meeting the PBS film.
B, blue light see through the anti-blue film 13 that is popular in, and keep the P polarization state, illuminate turquoise liquid crystal on silicon plate 11c.Change of polarized direction 90 degree of the blue light that reflects from blue road liquid crystal on silicon plate 11c become S light, see through the anti-blue film that is popular in again, and the polarization direction is constant, and blue S light is reflected after meeting the PBS polarizing coating.
At last, the green P light that sees through from triangular prism 9 and the red S light and the photosynthetic white light that becomes of blue S of reflection.Go out through projecting lens.
Green sub wave plate in the color-separation and color-recombination prism, its optical performance parameter is:
500nm＜optical wavelength＜580nm green glow transmitance＞98%, all the other wave band transmitance＜1%.
Optical wavelength＜490nm optical wavelength＞610nm purple light transmitance＞98%, all the other wave band transmitance＜1%.
Counter in the prism structures of color-separation and color-recombination parts is popular in blue film, and its optical performance parameter is:
To the light of 600-680nm wavelength, reflectivity: R%＞95%; To the light of 420-490nm wavelength, transmitance: T%＞95%.As calculated, the anti-angle that is popular in blue face is 47.5 degree in the triangular prism, could realize coating process.
Claims (1)
1, a kind of color-separation and color-recombination prism is characterized in that this prism comprises green color separation wave plate, Dove prism, triangular prism and compensation triangular prism; Be coated with polarization beam splitter between described Dove prism and the triangular prism; Be coated with the anti-blue film that is popular between triangular prism and the compensation triangular prism, the bevel angle between triangular prism and the compensation triangular prism is 45 °-48 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01279603 CN2515687Y (en) | 2001-12-28 | 2001-12-28 | Colour splitting colour-synthesizing prism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01279603 CN2515687Y (en) | 2001-12-28 | 2001-12-28 | Colour splitting colour-synthesizing prism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2515687Y true CN2515687Y (en) | 2002-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01279603 Expired - Fee Related CN2515687Y (en) | 2001-12-28 | 2001-12-28 | Colour splitting colour-synthesizing prism |
Country Status (1)
| Country | Link |
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| CN (1) | CN2515687Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328611C (en) * | 2002-11-25 | 2007-07-25 | 上海力保科技有限公司 | Optical-machine mechanism for digital projector |
| CN100385287C (en) * | 2003-09-03 | 2008-04-30 | 浙江舜宇光学有限公司 | Off-axis optical projector |
| CN101718913B (en) * | 2009-12-08 | 2011-07-27 | 福建华科光电有限公司 | Polarization conversion color-combination prism combination |
| CN101887141B (en) * | 2009-05-14 | 2012-07-18 | 深圳市绎立锐光科技开发有限公司 | Light-splitting color-combination plate set and method for eliminating total reflection thereof |
| CN107861242A (en) * | 2017-12-20 | 2018-03-30 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
-
2001
- 2001-12-28 CN CN 01279603 patent/CN2515687Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328611C (en) * | 2002-11-25 | 2007-07-25 | 上海力保科技有限公司 | Optical-machine mechanism for digital projector |
| CN100385287C (en) * | 2003-09-03 | 2008-04-30 | 浙江舜宇光学有限公司 | Off-axis optical projector |
| CN101887141B (en) * | 2009-05-14 | 2012-07-18 | 深圳市绎立锐光科技开发有限公司 | Light-splitting color-combination plate set and method for eliminating total reflection thereof |
| CN101718913B (en) * | 2009-12-08 | 2011-07-27 | 福建华科光电有限公司 | Polarization conversion color-combination prism combination |
| CN107861242A (en) * | 2017-12-20 | 2018-03-30 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
| CN107861242B (en) * | 2017-12-20 | 2019-07-05 | 嘉兴中润光学科技有限公司 | Imaging system with multisensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |