CN102253497B - Polarizing type stereo projector engine - Google Patents
Polarizing type stereo projector engine Download PDFInfo
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- CN102253497B CN102253497B CN201110203658.9A CN201110203658A CN102253497B CN 102253497 B CN102253497 B CN 102253497B CN 201110203658 A CN201110203658 A CN 201110203658A CN 102253497 B CN102253497 B CN 102253497B
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- light
- beam splitter
- polarized light
- polarizing beam
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Abstract
The invention discloses a polarizing type stereo projector engine which comprises a light source assembly, a light splitting/light composition optical path system and a projection lens. Light beam emitted by the light source assembly enters an inlet of the light splitting/light composition optical path system and is modulated as polarized light beam whose polarization state is vertical to other light beam, and the light beam enters into the projection lens. The light source assembly comprises a first light source, a second light source, a first polarization splitter, a first line polaroid transmitting P-polarized light, and a second line polaroid transmitting S- polarized light. Light beam emitted by the first light source transmits the first line polaroid and enters a first inlet of the first polarization splitter, light beam emitted by the second light source transmits the second line polaroid and enters a second inlet of the first polarization splitter, and emergent light of the first polarization splitter enters an inlet of the light splitting/light composition optical path system. According to the invention, image contrast of the polarizing type stereo projector can be raised fundamentally.
Description
Technical field
The present invention relates to polarization type 3D shadow casting technique, particularly relate to a kind of Polarizing type stereo projection optical machine engine.
Background technology
In recent years, reflection type stereoscopic shadow casting technique is approved widely, especially reflective type silicon-based liquid crystal (Liquid Crystal on Silicon, initialism is LCOS) maturation of technology, make projection display technique occur quantum jump, the further reduction of cost, the appearance of micro projector, the entertainment applications that makes projector market invest gradually household person from commercial affairs, education sector.The prosperity in three-dimensional film market, the market of further having widened three-dimensional home theater.Stereotelevision cost is high, and portable poor, miniature stereoprojection is the development trend of following three-dimensional home theater.
The core of the stereo projection technology based on polarized light is polarization spectro technology, by light splitting optical path system, incident beam is separated into the orthogonal two-route wire polarized light in polarization direction as illuminating bundle, through display device, be modulated into the light beam with image information, spectators can see stereo-picture with the upper polarization direction glasses corresponding with image beam polarization direction.
As shown in Figure 1, traditional optical machine engine adopts natural light as light source, utilize the optical polarization device of separation/combination light path system to modulate linearly polarized light, but because the extinction ratio of optical polarization device is unsatisfactory, it only can access partial poolarized light and cannot obtain linearly polarized light (or linearly polarized light of high-polarization) completely, thereby causes the picture contrast of projection not high.
Explanation of nouns:
Extinction ratio: two polarizer P1 and P2 left and right row are putting, and are the polarizer as we claim P1, and the light that sees through P1 is linearly polarized light, title P2 is analyzer, if the optical axis of P1 and P2 is consistent, the light intensity that sees through P2 is the strongest, if the optical axis of P1 and P2 differs 90 degree, light intensity is the darkest.Maximum sees through light intensity and minimum/secretly the ratio through light intensity is called extinction ratio.
Degree of polarization: linearly polarized light is shared ratio in total light intensity.Generally speaking, degree of polarization changes between 0 (natural light) and 1 (full polarization).
Summary of the invention
Technical matters to be solved by this invention is that a kind of LCOS Polarizing type stereo projection optical machine engine that can effectively improve image contrast is provided.
Technical matters of the present invention is solved by the following technical programs:
A Polarizing type stereo projection optical machine engine, comprises light source assembly, separation/combination light path system, projection lens; The light that described light source assembly sends is incident to described separation/combination light path system by the entrance of described separation/combination light path system, after becoming the perpendicular light beam of polarization state, separation/combination system modulation enters described projection lens, wherein: described light source assembly comprises the first light source, secondary light source, transmission P-polarized light and reflects S polarized light or transmission S polarized light and the first polarizing beam splitter, the First Line polaroid of transmission P-polarized light and second linear polarizer of transmission S polarized light of reflected P-polarized light; Described in the light transmission that described the first light source sends after First Line polaroid from the first entrance incident of described the first polarization splitting prism, described in the light transmission that described secondary light source sends after the second linear polarizer from the second entrance incident of described the first polarization splitting prism, the emergent light of described the first polarizing beam splitter is incident to described separation/combination light path system from the entrance of described separation/combination light path system.
Preferably, described separation/combination light path system comprises transmission P-polarized light and reflects S polarized light or transmission S polarized light and the second polarizing beam splitter, the first reflective electrooptic modulator and the second reflective electrooptic modulator of reflected P-polarized light, and described the first reflective electrooptic modulator and the second reflective electrooptic modulator lay respectively at two exit portals that described the second polarizing beam splitter is adjacent.
Preferably, described the first reflective electrooptic modulator and the second reflective electrooptic modulator are reflective type silicon-based liquid crystal panel.
Preferably, when incident light is while being parallel, the transmissivity T>50% of described First Line polaroid and the second linear polarizer, field angle > ± 45 °, Xiao Guang Bi≤100:1.
Preferably, minute backscatter extinction logarithmic ratio of described the first polarizing beam splitter and the second polarizing beam splitter
for: 0.9≤
≤ 1; Reflected light extinction ratio is greater than 100; Transmitted light delustring is greater than 100.
The present invention's beneficial effect compared with prior art comprises: utilize two linear polarizer that the light beam that has respectively two light sources to send is polarized, form the orthogonal two bunch polarized lights in polarization direction, and then by polarizing beam splitter, this two bunch polarization is carried out to secondary selection, finally by the second polarizing beam splitter, two bunch polarized lights are carried out to selection for the third time, thereby form a branch of light beam being formed by P-polarized light and the S polarized light of high-polarization as the light source of Polarizing type stereo projection optical machine engine, can effectively improve the image contrast of polarization type stereo projector.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Polarizing type stereo projection optical machine engine of prior art;
Fig. 2 is the light channel structure schematic diagram of the Polarizing type stereo projection optical machine engine of the embodiment of the present invention 1;
Fig. 3 is the light channel structure schematic diagram of the Polarizing type stereo projection optical machine engine of the embodiment of the present invention 2;
Fig. 4 is the light channel structure schematic diagram of the Polarizing type stereo projection optical machine engine of the embodiment of the present invention 3;
Fig. 5 is the light channel structure schematic diagram of the Polarizing type stereo projection optical machine engine of the embodiment of the present invention 4.
Embodiment
Contrast accompanying drawing below and in conjunction with preferred embodiment, the present invention be explained in detail.
Embodiment 1
As shown in Figure 2, the Polarizing type stereo projection optical machine engine of the present embodiment comprises light source assembly 100, separation/combination light path system 200, projection lens 300; The emergent light of light source assembly 100 is incident to separation/combination light path system 200 by the entrance of separation/combination light path system 200, enters described projection lens 300 after separation/combination system modulation becomes the perpendicular light beam of polarization state.Its concrete structure is as follows:
Light source assembly 100 by the first light source 101, secondary light source 102, transmission P-polarized light and the second linear polarizer 104 that reflects the first polarizing beam splitter 105 of S polarized light, the First Line polaroid 103 of transmission P-polarized light and transmission S polarized light form, First Line polaroid 103, the second linear polarizer 104 are separately positioned on two beam inlet of the first polarizing beam splitter 105, for being polarized being incident to the light beam of the first polarizing beam splitter 105; The first light beam that the first light source 101 sends is incident upon on First Line polaroid 103, during the first light beam transmission First Line polaroid 103, its S polarized light component is by First Line polaroid 103 reflection and absorb, and after the transmission of P-polarized light component from the first entrance incident of the first polarizing beam splitter 105; The second light beam that secondary light source 102 sends is incident upon in the second linear polarizer 104, during second light beam transmission the second linear polarizer 104, its P-polarized light component is by the second linear polarizer 104 reflection and absorb, after the transmission of S polarized light component from the second entrance incident of the first polarizing beam splitter 105; After the two light beams of 105 pairs of incidents of the first polarizing beam splitter is selected again, form the light beam that a branch of S polarized light by high-polarization and P-polarized light form, this light beam is incident to described separation/combination light path system from the entrance of separation/combination light path system.Wherein, First Line polaroid and the requirement of the second linear polarizer performance parameter are: when incident light is directional light, and its transmissivity: T>50%, field angle > ± 45 °, Xiao Guang Bi≤100:1.
The separation/combination light path system 200 of the present embodiment is the second polarizing beam splitter 201 of transmission P-polarized light component by reflection S polarized light component, the first reflective electrooptic modulator 202 and the second reflective electrooptic modulator 203 form, the first reflective electrooptic modulator 202 and the second reflective electrooptic modulator 203 lay respectively on the S polarized light component and P-polarized light component emitting light path of the second polarizing beam splitter 201, be respectively used to S polarized light component and P-polarized light component to modulate: S polarized light component is modulated into the P-polarized light with image information, P-polarized light component is modulated into the S polarized light with image information, P-polarized light after modulation and S polarized light are reflected back toward respectively the second polarizing beam splitter 105, then from exit portal, go out to inject projection lens 300.
The first reflective electrooptic modulator 202 and the second reflective electrooptic modulator 203 of the present embodiment all adopt reflective type silicon-based liquid crystal panel; The first polarizing beam splitter, the second polarizing beam splitter preferably all adopt polarization splitting prism or grating polarization optical splitter.The parameter of the first polarizing beam splitter and the second polarizing beam splitter is: Rs > 0.8; Tp > 0.8; Divide backscatter extinction logarithmic ratio
for: 0.9≤
≤ 1; Reflected light extinction ratio
for:
> 100:1; Transmitted light extinction ratio
for:
> 100:1; Wherein, Rs is the reflectivity to S polarized light, and Rp is the reflectivity to P-polarized light, and Ts is the transmissivity to S polarized light, and Tp is the transmissivity to P-polarized light.The present embodiment the first polarizing beam splitter and the second polarizing beam splitter all adopt transmission P-polarized light and reflect the polarization splitting prism of S polarized light, but when concrete application, polarizing beam splitter transmission P-polarized light or S polarized light can be selected according to actual needs, are not limited to the transmission P-polarized light of the present embodiment and reflect S polarized light.
Embodiment 2
The difference of the present embodiment and embodiment 1 is only, first polarizing beam splitter 105 of the present embodiment, the second polarizing beam splitter 201 all adopt grating polarization optical splitter.
Embodiment 3
The difference of the present embodiment and embodiment 1 is only, the first polarizing beam splitter 105 employing grating polarization optical splitters of the present embodiment, and the second polarizing beam splitter 201 adopts polarization splitting prisms.
Embodiment 4
The difference of the present embodiment and embodiment 1 is only, the first polarizing beam splitter 105 employing polarization splitting prisms of the present embodiment, and the second polarizing beam splitter 201 adopts grating polarization optical splitters.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, can also make some being equal to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (2)
1. a Polarizing type stereo projection optical machine engine, comprises light source assembly, separation/combination light path system, projection lens; The light beam that described light source assembly sends is incident to described separation/combination light path system by the entrance of described separation/combination light path system, after separation/combination light path system is modulated into the perpendicular light beam of polarization state, enters described projection lens, it is characterized in that:
Described light source assembly comprises the first light source, secondary light source, transmission P-polarized light and reflects S polarized light or transmission S polarized light and the first polarizing beam splitter, the First Line polaroid of transmission P-polarized light and second linear polarizer of transmission S polarized light of reflected P-polarized light; Described in the light beam transmission that described the first light source sends after First Line polaroid from the first entrance incident of described the first polarizing beam splitter, described in the light beam transmission that described secondary light source sends after the second linear polarizer from the second entrance incident of described the first polarizing beam splitter, the emergent light of described the first polarizing beam splitter is incident to described separation/combination light path system from the entrance of described separation/combination light path system;
Described separation/combination light path system comprises transmission P-polarized light and reflects S polarized light or transmission S polarized light and the second polarizing beam splitter, the first reflective electrooptic modulator and the second reflective electrooptic modulator of reflected P-polarized light, and described the first reflective electrooptic modulator and the second reflective electrooptic modulator lay respectively at two exit portals that described the second polarizing beam splitter is adjacent;
Described the first polarizing beam splitter and the second polarizing beam splitter are grating polarization optical splitter;
The transmissivity T>50% of described First Line polaroid and the second linear polarizer, field angle > ± 45 °, Xiao Guang Bi≤100:1;
Minute backscatter extinction logarithmic ratio of described the first polarizing beam splitter and the second polarizing beam splitter
for:
reflected light extinction ratio is greater than 100; Transmitted light extinction ratio is greater than 100.
2. Polarizing type stereo projection optical machine engine according to claim 1, is characterized in that: described the first reflective electrooptic modulator and the second reflective electrooptic modulator are reflective type silicon-based liquid crystal panel.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203658.9A CN102253497B (en) | 2011-07-20 | 2011-07-20 | Polarizing type stereo projector engine |
| HK11111286.7A HK1156873A1 (en) | 2011-07-20 | 2011-10-20 | Treatment using reprogrammed mature adult cells |
| HK12104569.9A HK1163828A1 (en) | 2011-07-20 | 2012-05-09 | A polarizing type 3d projection optical engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110203658.9A CN102253497B (en) | 2011-07-20 | 2011-07-20 | Polarizing type stereo projector engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102253497A CN102253497A (en) | 2011-11-23 |
| CN102253497B true CN102253497B (en) | 2014-04-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110203658.9A Active CN102253497B (en) | 2011-07-20 | 2011-07-20 | Polarizing type stereo projector engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102253497B (en) |
| HK (2) | HK1156873A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360156A (en) * | 2011-09-29 | 2012-02-22 | 福建网讯科技有限公司 | 3D (three-dimensional) protection device and 3D projection method |
| CN102566249B (en) * | 2012-01-06 | 2014-10-15 | 深圳秋田微电子有限公司 | Stereo projection system with single projector and dual liquid crystal light valves, projector and driving method |
| CN102540696B (en) * | 2012-01-06 | 2015-07-22 | 深圳秋田微电子有限公司 | Single projector type stereoscopic projection system, projector and driving method |
| TWI486640B (en) * | 2012-12-28 | 2015-06-01 | Delta Electronics Inc | Stereoscopic projection device and display method thereof |
| CN109407315B (en) * | 2018-11-09 | 2021-09-17 | 京东方科技集团股份有限公司 | Display system and display method thereof |
| CN109445111B (en) * | 2018-12-29 | 2021-01-15 | 联想(北京)有限公司 | Optical device |
| CN111721990A (en) * | 2020-06-01 | 2020-09-29 | 贵州江源电力建设有限公司 | Miniaturized optical fiber current sensor and information processing system |
| CN112859240B (en) * | 2021-03-03 | 2022-07-15 | 兰州大学 | Reconfigurable mode converter based on Mach-Zehnder interferometer |
| CN113721415B (en) * | 2021-08-30 | 2022-10-28 | 歌尔光学科技有限公司 | Projection light machine |
Citations (3)
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|---|---|---|---|---|
| CN1570704A (en) * | 2003-07-18 | 2005-01-26 | 邵剑心 | Three dimension/two dimension switchable color projection display device and method thereof |
| CN1786815A (en) * | 2004-12-07 | 2006-06-14 | 精工爱普生株式会社 | Illuminating apparatus and projector |
| CN101295076A (en) * | 2007-04-29 | 2008-10-29 | 晶荧光学科技有限公司 | Polarization spectroscopic device and projection display device using the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW311181B (en) * | 1996-07-19 | 1997-07-21 | Ind Tech Res Inst | The 3D photograph device |
| US6672722B2 (en) * | 2001-06-19 | 2004-01-06 | Intel Corporation | Projection engine |
| CN101770150A (en) * | 2010-01-20 | 2010-07-07 | 宁波市科技园区华域电子有限公司 | Optical engine for time-sharing work of P and S light |
| CN202141860U (en) * | 2011-07-20 | 2012-02-08 | 清华大学深圳研究生院 | Polarizing type stereo projection optical machine engine |
-
2011
- 2011-07-20 CN CN201110203658.9A patent/CN102253497B/en active Active
- 2011-10-20 HK HK11111286.7A patent/HK1156873A1/en not_active IP Right Cessation
-
2012
- 2012-05-09 HK HK12104569.9A patent/HK1163828A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1570704A (en) * | 2003-07-18 | 2005-01-26 | 邵剑心 | Three dimension/two dimension switchable color projection display device and method thereof |
| CN1786815A (en) * | 2004-12-07 | 2006-06-14 | 精工爱普生株式会社 | Illuminating apparatus and projector |
| CN101295076A (en) * | 2007-04-29 | 2008-10-29 | 晶荧光学科技有限公司 | Polarization spectroscopic device and projection display device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102253497A (en) | 2011-11-23 |
| HK1163828A1 (en) | 2012-09-14 |
| HK1156873A1 (en) | 2012-06-22 |
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Address after: 518055 Guangdong city in Shenzhen Province, Nanshan District City Xili street Shenzhen University Tsinghua Campus A building two floor Patentee after: Shenzhen International Graduate School of Tsinghua University Address before: 518055 Guangdong city of Shenzhen province Nanshan District Xili of Tsinghua Patentee before: GRADUATE SCHOOL AT SHENZHEN, TSINGHUA University |
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Effective date of registration: 20200806 Address after: 264200, Xu Town, Shandong, Rushan province Weihai resident Patentee after: Weihai Huishi Biotechnology Co.,Ltd. Address before: 518055 Guangdong city in Shenzhen Province, Nanshan District City Xili street Shenzhen University Tsinghua Campus A building two floor Patentee before: Shenzhen International Graduate School of Tsinghua University |