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CN102253497B - Polarizing type stereo projector engine - Google Patents

Polarizing type stereo projector engine Download PDF

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CN102253497B
CN102253497B CN 201110203658 CN201110203658A CN102253497B CN 102253497 B CN102253497 B CN 102253497B CN 201110203658 CN201110203658 CN 201110203658 CN 201110203658 A CN201110203658 A CN 201110203658A CN 102253497 B CN102253497 B CN 102253497B
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polarizing
type
stereo
projector
engine
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CN102253497A (en )
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程雪岷
廖汉忠
林家用
马建设
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清华大学深圳研究生院
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Abstract

本发明公开了一种偏光式立体投影光机引擎,包括光源组件、分光/合光光路系统、投影镜头;光源组件发出的光束通过所述分光/合光光路系统的入口入射至分光/合光光路系统,经分光/合光光路系统调制成偏振态相垂直的偏振光束后进入投影镜头,光源组件包括第一光源、第二光源、第一偏振分光器、透射P-偏振光的第一线偏振片、以及透射S-偏振光的第二线偏振片;第一光源发出的光束透射第一线偏振片后从所述第一偏振分光器的第一入口入射,第二光源发出的光束透射第二线偏振片后从第一偏振分光器的第二入口入射,第一偏振分光器的出射光从分光/合光光路系统的入口入射。 The present invention discloses a stereoscopic projection light polarized machine engine, comprising a light source assembly, a beam / combined light path system, a projection lens; a light beam emitted by the light source assembly the spectral inlet / combiner system light path incident on the beam splitter / combiner optical optical system, the beam splitter / combiner system is modulated into the light path polarization perpendicular to the polarization beam enters the projection lens, the light source assembly includes a first light source, second light source, a first polarization beam splitter, a first transmission line P- polarized polarizing plate, polarizing plate and a second transmission line S- polarized light; a light beam passes through the first beam of the first light emitted from the polarizer transmits the first line of the first inlet enters the first polarization beam splitter, a second light emitted after the second line from the second inlet polarizer enters the first polarization beam splitter, a first polarization beam splitter output light is incident from the spectroscopic inlet / combiner system light path. 本发明能够从根本上提高偏光式立体投影仪的影像对比度。 The present invention can improve the contrast of the image projection apparatus a polarization stereoscopic fundamentally.

Description

一种偏光式立体投影光机引擎 One kind of polarized stereoscopic projection light machine engine

技术领域 FIELD

[0001] 本发明涉及偏光式3D投影技术,特别是涉及一种偏光式立体投影光机引擎。 [0001] The present invention relates to a polarized 3D projection technology, particularly to a polarized stereoscopic projection light machine engine.

背景技术 Background technique

[0002] 近年来,反射式立体投影技术已得到广泛的认可,尤其是反射式硅基液晶(LiquidCrystal on Silicon ,缩略词为LCOS)技术的成熟,使投影显示技术出现了巨大突破,成本的进一步降低,微型投影仪的出现,使投影仪市场从商务、教育领域逐渐投向了家庭个人的娱乐应用。 [0002] In recent years, reflective perspective projection technology has been widely recognized, particularly a reflective liquid crystal on silicon (LiquidCrystal on Silicon, the acronym LCOS) technology matures, the projection display technology a dramatic breakthrough, the cost of further reduce the emergence of micro-projector, the projector market from the fields of business, education and gradually invest in home personal entertainment applications. 立体影视市场的繁荣,进一步拓宽了立体家庭影院的市场。 Prosperity dimensional video market, and further widen the stereo home theater market. 立体电视成本高,便携性差,微型立体投影是未来立体家庭影院的发展趋势。 High stereoscopic television costs, poor portability, miniature three-dimensional stereoscopic projection is the future trend of home theater.

[0003] 基于偏振光的立体投影技术的核心是偏振分光技术,用分光光路系统将入射光束分离成偏振方向相互垂直的两路线偏振光作为照明光束,经显示装置调制成带有图像信息的光束,观众带上偏振方向与图像光束偏振方向对应的眼镜即可看到立体图像。 [0003] Based on a perspective projection technology core polarized light is a polarizing beam splitter technology, with sub-system light path the incident light beam into two mutually perpendicular directions of polarization polarized light as illumination beam path, beam modulated by the display device with image information to , to bring the viewer to the polarization direction of the polarization direction of the light beam corresponding to image glasses to see a stereoscopic image.

[0004] 如图1所示,传统的光机引擎采用自然光作为光源,利用分光/合光路系统的光学偏振器件调制出线偏振光,但由于光学偏振器件的消光比并不理想,其仅能够得到部分偏振光而无法得到完全的线偏振光(或者高偏振度的线偏振光),从而导致投影的图像对比度不闻。 [0004] As shown in FIG. 1, a conventional machine engine using natural light as a light source, using the spectral / modulation optical polarization device combined optical system of the outgoing polarized light, but not over the polarization extinction ratio of the optical device, which can be obtained only partially polarized light can not be completely linearly polarized light (or a high degree of polarization of the polarized light lines), so that the contrast of the projected image does not smell.

[0005] 名词解释: [0005] Glossary:

[0006] 消光比:二个偏振元件Pl和P2左右排置放着,如我们称Pl为起偏器,透过Pl的光为线偏振光,称P2为检偏器,如果Pl和P2的光轴一致,则透过P2的光强最强,如果Pl和P2的光轴相差90度,则光强最暗。 [0006] Extinction ratio: Pl and two polarizing elements placed around the row of P2, we call such as a polarizer Pl, Pl is transmitted through the light linearly polarized light, said analyzer is P2, if Pl and P2 consistent with the optical axis, the transmitted light intensity of the strongest P2, if Pl and P2 of the optical axis by 90 degrees, the light intensity of the darkest. 最大透过光强与最小/暗透过光强之比称为消光比。 The maximum transmission ratio is called extinction ratio of the transmitted light intensity and the minimum intensity / dark.

[0007] 偏振度:线偏振光在总光强中所占的比例。 [0007] The polarization degree: the ratio of the linearly polarized light in the total light intensity in. 一般而言,偏振度在0(自然光)与1(全偏振)间变化。 In general, changes in the degree of polarization between 0 (natural light) and 1 (full polarization).

发明内容 SUMMARY

[0008] 本发明所要解决的技术问题是,提供一种能够有效提高影像对比度的LCOS偏光式立体投影光机引擎。 [0008] The present invention solves the technical problem is to provide an improved image contrast in LCOS effective polarized stereoscopic projection light machine engine.

[0009] 本发明的技术问题通过以下技术方案予以解决: [0009] The technical problem to be solved by the present invention, the following technical solution:

[0010] —种偏光式立体投影光机引擎,包括光源组件、分光/合光光路系统、投影镜头;所述光源组件发出的光通过所述分光/合光光路系统的入口入射至所述分光/合光光路系统,经分光/合光系统调制成偏振态相垂直的偏振光束后进入所述投影镜头,其中:所述光源组件包括第一光源、第二光源、透射P-偏振光而反射S-偏振光或透射S-偏振光而反射P-偏振光的第一偏振分光器、透射P-偏振光的第一线偏振片、以及透射S-偏振光的第二线偏振片;所述第一光源发出的光透射所述第一线偏振片后从所述第一偏振分光棱镜的第一入口入射,所述第二光源发出的光透射所述第二线偏振片后从所述第一偏振分光棱镜的第二入口入射,所述第一偏振分光器的出射光从所述分光/合光光路系统的入口入射至所述分光/合光光路系统。 [0010] - species polarized stereoscopic projection light machine engine, comprising a light source assembly, a beam / combiner system light path, the projection lens; emitted from the light source assembly inlet incident light through the beam splitter / combiner beam path to the spectroscopic system / combiner system light path, the light is dispersed / combined light enters the projection lens system the modulated polarization state perpendicular to the polarized light beam, wherein: said light source assembly comprises a first light source, second light source, while reflecting polarized light transmittance P- S- S- polarized light polarized light reflected or transmitted P- polarized first polarization beam splitter, a first polarizing plate transmission line P- polarized light, and a second transmission line S- polarized polarizer; a second after the second light transmission line of the polarizing film transmitting light emitted from a light source a first line of the first polarizing plate polarizing beam splitter prism enters the first inlet, the second light source emitted from the first polarization dichroic prism incident second inlet, said first polarization beam splitter from the outgoing light incident on the beam splitter inlet / combined beam path to the spectroscopic system / systems combined light path. [0011] 优选地,所述分光/合光光路系统包括透射P-偏振光而反射S-偏振光或透射S-偏振光而反射P-偏振光的第二偏振分光器、第一反射式电光调制器和第二反射式电光调制器,所述第一反射式电光调制器和第二反射式电光调制器分别位于所述第二偏振分光器相邻的两个出射口。 [0011] Preferably, the optical splitter / combiner system comprising transmitting light path P- polarized light and reflecting or transmitting S- S- polarized light reflected polarized light P- polarized second polarization beam splitter, a first reflective electrooptic modulator and the second reflective electro-optic modulator, a first reflection type electro-optic modulator and the second reflective electro-optic modulator are located adjacent to the second polarization beam splitter of the two exit ports.

[0012] 优选地,所述第一反射式电光调制器和第二反射式电光调制器为反射式硅基液晶面板。 [0012] Preferably, the first reflective electro-optic modulator and the second reflective electro-optic modulator is a reflective liquid crystal panel silicon.

[0013] 优选地,当入射光为平行时,所述第一线偏振片与第二线偏振片的透射率T>50%,视场角>±45°,消光比兰100:1。 [0013] Preferably, when the incident light is parallel to the first line and the second line transmittance of the polarizing plate polarizer T> 50%, viewing angle> ± 45 °, the extinction ratio of Blue 100: 1.

[0014] 优选地,所述第一偏振分光器和第二偏振分光器的分光系数 Spectral coefficients [0014] Preferably, the first polarization beam splitter and the second polarization beam splitter

Figure CN102253497BD00041

反射光消光比大于100 ;透射光消光大于100。 Reflected light extinction ratio greater than 100; Everbright transmitted light extinction at 100.

[0015] 本发明与现有技术相比的有益效果包括:利用两个线偏振片将分别有两个光源发出的光束进行起偏,形成偏振方向相互垂直的两束线偏振光,然后再通过偏振分光器对该两束线偏振进行二次选择,最后通过第二偏振分光器对两束线偏振光进行第三次的选择,从而形成一束由高偏振度的P-偏振光和S-偏振光组成的光束作为偏光式立体投影光机引擎的光源,能够有效地提高偏光式立体投影机的影像对比度。 [0015] Advantageous effects of the present invention compared to the prior art comprises: a linear-polarizing plate using two light beams respectively emitted by the two light sources polarizer, the polarization directions perpendicular to each other forming two beams of linearly polarized light, and then through polarization beam splitter linear polarization of the two beams for secondary selection, and finally a third selection of two beams of linearly polarized light by the second polarization beam splitter, so as to form a bundle of a high degree of polarization of the polarized light P- and S- polarized light beam as a light source composed of a perspective projection light polarized machine engine, it is possible to effectively improve image contrast polarizing stereoscopic projector.

附图说明 BRIEF DESCRIPTION

[0016] 图1是现有技术的偏光式立体投影光机引擎的结构示意图; [0016] FIG. 1 is a perspective schematic view of polarized projection light engine, the prior art machine;

[0017] 图2是本发明实施例1的偏光式立体投影光机引擎的光路结构示意图; [0017] FIG. 2 is a schematic perspective polarized projection light optical structure machine engine according to embodiment 1 of the present invention;

[0018] 图3是本发明实施例2的偏光式立体投影光机引擎的光路结构示意图; [0018] FIG. 3 is a diagram showing a configuration example of an optical path polarized stereoscopic projection light engine unit 2 of the embodiment of the present invention;

[0019] 图4是本发明实施例3的偏光式立体投影光机引擎的光路结构示意图; [0019] FIG. 4 is a schematic optical structure polarized stereoscopic projection light engine unit according to the third embodiment of the present invention;

[0020] 图5是本发明实施例4的偏光式立体投影光机引擎的光路结构示意图。 [0020] FIG. 5 is a diagram showing a configuration example of an optical path of light polarized stereoscopic projector engine unit 4 of the embodiment of the present invention.

具体实施方式 detailed description

[0021] 下面对照附图并结合优选具体实施方式对本发明进行详细的阐述。 In conjunction with the accompanying drawings and preferred embodiments of the present invention will be explained in detail [0021] below with reference.

[0022] 实施例1 [0022] Example 1

[0023] 如图2所示,本实施例的偏光式立体投影光机引擎包括光源组件100、分光/合光光路系统200、投影镜头300 ;光源组件100的出射光通过分光/合光光路系统200的入口入射至分光/合光光路系统200,经分光/合光系统调制成偏振态相垂直的偏振光束后进入所述投影镜头300。 [0023] 2, the polarization stereoscopic projection light engine unit according to the present embodiment includes a light source assembly 100, a beam splitter / combiner system light path 200, a projection lens 300; outgoing light source assembly 100 passes through the beam splitter / combiner system light path inlet 200 is incident to beam splitter / combiner system 200 beam path, the beam splitter / combiner optical system to be modulated orthogonal polarization state of the polarized beam enters the projection lens 300. 其具体结构如下: The specific structure is as follows:

[0024] 光源组件100由第一光源101、第二光源102、透射P-偏振光而反射S-偏振光的第一偏振分光器105、透射P-偏振光的第一线偏振片103、以及透射S-偏振光的第二线偏振片104组成,第一线偏振片103、第二线偏振片104分别设置在第一偏振分光器105的两个光束入口,用于对入射至第一偏振分光器105的光束进行起偏;第一光源101发出的第一光束投射在第一线偏振片103上,第一光束透射第一线偏振片103时,其S-偏振光分量被第一线偏振片103反射和吸收,而P-偏振光分量透射后从第一偏振分光器105的第一入口入射;第二光源102发出的第二光束投射在第二线偏振片104上,第二光束透射第二线偏振片104时,其P-偏振光分量被第二线偏振片104反射和吸收,S-偏振光分量透射后从第一偏振分光器105的第二入口入射;第一偏振分光器105对入射的两束光束进行再次选择后,形成一束由高偏 [0024] The light source assembly 100 from the first light source 101, second light source 102, while reflecting polarized light transmittance P- S- polarized light of the first polarization beam splitter 105, a first transmission line P- polarized light polarizer 103, and S- polarized light transmitting polarizing plate 104 composed of a second line, a first linear polariser 103, polarizing plates 104 are provided a second line inlet of the first two beams in polarization beam splitter 105, enters for the first polarization beam splitter beam 105 is a polarizer; a first light source 101 emits a first light beam is projected on the first line of the polarizing plate 103, a first light polarizing plate transmits the first line 103, the S- polarized light component which is a first linear polariser 103 reflection and absorption, transmission and P- polarized light component incident from the first inlet 105 of a first polarization beam splitter; and a second light source 102 emits a second light beam is projected on the second line of the polarizing plate 104, a second light beam transmitted through the second line polarizing plate 104, which is P- polarized light component and the second linear polarizer 104 absorb reflection, the S- polarized light component transmitted through the second inlet is incident from the first polarization beam splitter 105; a first polarization beam splitter 105 is incident after two beams again selected, a bundle formed of a high bias 度的S-偏振光和P-偏振光组成的光束,该光束从分光/合光光路系统的入口入射至所述分光/合光光路系统。 S- and P- polarized beams composed of the polarized light of the incident light beam from the entrance beam splitter / combiner system light path to the beam splitter / combiner system light path. 其中,第一线偏振片与第二线偏振片性能参数要求为:当入射光为平行光时,其透射率:T>50%,视场角>±45°,消光比会100:1。 Wherein the first line and the second line polarizer polarizing performance parameters as follows: when the incident light is parallel light which transmittance: T> 50%, viewing angle> ± 45 °, the extinction ratio will be 100: 1.

[0025] 本实施例的分光/合光光路系统200由反射S-偏振光分量而透射P-偏振光分量的第二偏振分光器201、第一反射式电光调制器202和第二反射式电光调制器203组成,第一反射式电光调制器202和第二反射式电光调制器203分别位于第二偏振分光器201的S-偏振光分量和P-偏振光分量出射光路上,分别用于对S-偏振光分量和P-偏振光分量进行调制:S-偏振光分量被调制成带有图像信息的P-偏振光、P-偏振光分量被调制成带有图像信息的S-偏振光,调制后的P-偏振光和S-偏振光分别被反射回第二偏振分光器105,然后从出射口出射进入投影镜头300。 [0025] The present spectrophotometric / combined light path system 200 of the embodiment S- polarized light component reflected by the P- polarized light component while transmitting the second polarization beam splitter 201, a first reflective electro-optical modulator 202 and the second reflective electrooptic 203. modulator, a first reflection type electro-optical modulator 202 and the second reflective electro-optic modulator 203 are respectively located on the second polarization beam splitter S- and P- polarized light component 201 polarized component outgoing path, respectively, for S- and P- polarized light component polarized light component is modulated: S- polarized light component is modulated as a P- polarized light with image information, P- polarized light component is modulated with the image information S- polarized, P- and S- polarization modulated polarized light are reflected back to the second polarization beam splitter 105, and then exit from the exit port 300 into the projection lens.

[0026] 本实施例的第一反射式电光调制器202和第二反射式电光调制器203均采用反射式娃基液晶面板;第一偏振分光器、第二偏振分光器优选均米用偏振分光棱镜或光栅偏振 [0026] This first reflection-type optical modulator 202 and a second reflective embodiment of the electro-optic modulator 203 are Wa employing a reflective liquid crystal panel substrate; a first polarization beam splitter, a second polarization beam splitter with a polarizing beam splitter preferably both m a prism or a grating polarizer

分光器。 Splitter. 第一偏振分光器和第二偏振分光器的参数为:Rs > 0.8 ;Tp > 0.8 ;分光系数 Parameters of the first polarization beam splitter and the second polarization beam splitter is: Rs> 0.8; Tp> 0.8; spectral coefficients

Figure CN102253497BD00051

Ms Ms

为: for:

Figure CN102253497BD00052

反射光消光比I为 Reflected light extinction ratio of I

Figure CN102253497BD00053

;透射光消光比I为 ; Extinction ratio of the transmitted light I is

Figure CN102253497BD00054

其中,Rs为对S-偏振光的反射率,Rp为对P-偏振光的反射率,Ts为对S-偏振光的透射率,Tp为对P-偏振光的透射率。 Wherein, Rs is the reflectivity of the S- polarized light, Rp is the reflectance of the P- polarized light, Ts transmittance of S- polarized light, Tp is the transmittance of the P- polarized light. 本实施例第一偏振分光器和第二偏振分光器均米用透射P-偏振光而反射S-偏振光的偏振分光棱镜,但在具体应用时,偏振分光器透射P-偏振光还是S-偏振光可根据实际需要进行选择,并不限于本实施例的透射P-偏振光而反射S-偏振光。 The first embodiment of the second polarization beam splitter and a polarization beam splitter according to the present embodiment are meters with a transmission P- polarized light reflected S- polarized light splitting prism, but in a particular application, polarization beam splitter transmitting or S- polarized light P- polarization can be selected according to actual needs, not limited to the transmissive polarization P- polarized light reflected S- embodiment according to the present embodiment.

[0027] 实施例2 [0027] Example 2

[0028] 本实施例与实施例1的不同之处仅在于,本实施例的第一偏振分光器105、第二偏振分光器201均米用光栅偏振分光器。 [0028] The present embodiment is different from the embodiment 1 only in that the first polarization beam splitter 105 of the present embodiment, the second polarization beam splitter 201 are polarization beam splitter grating with meters.

[0029] 实施例3 [0029] Example 3

[0030] 本实施例与实施例1的不同之处仅在于,本实施例的第一偏振分光器105米用光栅偏振分光器,而第二偏振分光器201米用偏振分光棱镜。 [0030] The present embodiment is different from the embodiment 1 only in that the first polarization beam splitter according to the present embodiment is 105 m raster polarization beam splitter and the second polarization beam splitter with a polarization splitting prism 201 m.

[0031] 实施例4 [0031] Example 4

[0032] 本实施例与实施例1的不同之处仅在于,本实施例的第一偏振分光器105米用偏振分光棱镜,而第二偏振分光器201米用光栅偏振分光器。 [0032] The present embodiment is different from the embodiment 1 only in that the first polarization beam splitter according to the present embodiment is 105 m with a polarizing beam splitter prism, and the second polarization beam splitter 201 m with a polarization beam splitter grating.

[0033] 以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施只局限于这些说明。 [0033] The above contents with the specific preferred embodiments of the present invention is further made to the detailed description, specific embodiments of the present invention should not be considered limited to these descriptions. 对于本发明所属技术领域的技术人员来说,在不脱离本发明构思的前提下,还可以做出若干等同替代或明显变型,而且性能或用途相同,都应当视为属于本发明的保护范围。 To those skilled in the art for the present invention, without departing from the spirit of the present invention, it can make various obvious modifications or equivalents, and the same performance or use, should be deemed to belong to the scope of the present invention.

Claims (2)

  1. 1.一种偏光式立体投影光机引擎,包括光源组件、分光/合光光路系统、投影镜头;所述光源组件发出的光束通过所述分光/合光光路系统的入口入射至所述分光/合光光路系统,经分光/合光光路系统调制成偏振态相垂直的偏振光束后进入所述投影镜头,其特征在于: 所述光源组件包括第一光源、第二光源、透射P-偏振光而反射S-偏振光或透射S-偏振光而反射P-偏振光的第一偏振分光器、透射P-偏振光的第一线偏振片、以及透射S-偏振光的第二线偏振片;所述第一光源发出的光束透射所述第一线偏振片后从所述第一偏振分光器的第一入口入射,所述第二光源发出的光束透射所述第二线偏振片后从所述第一偏振分光器的第二入口入射,所述第一偏振分光器的出射光从所述分光/合光光路系统的入口入射至所述分光/合光光路系统; 所述分光/合光光路系统包括透射 A stereoscopic projection light polarized machine engine, comprising a light source assembly, a beam / combined light path system, a projection lens; a beam emitted from said light source through the beam splitter assembly / closing the inlet incident light path to the spectroscopic system / after the combined light path system, the spectral / modulation system combined beam path perpendicular to the polarization of the polarized light beam enters the projection lens, wherein: said assembly comprises a first light source, second light source, P- polarized light transmission S- polarized light is reflected polarized light and reflecting or transmitting S- P- polarized first polarization beam splitter, a first polarizing plate transmission line P- polarized light, and a second transmission line S- polarized light of the polarizing plate; the after the transmission of said light beam which transmits the beam emitted from the first light source a first line of the polarizing plate from the first inlet enters the first polarization beam splitter, the second light source emits a second line from said first polarizer a polarization beam splitter is incident on the second inlet, the exit of the first polarization beam splitter from the light incident on the beam splitter inlet / combined beam path to the spectroscopic system / combined light path system; the spectroscopic / combined light path system including transmission P-偏振光而反射S-偏振光或透射S-偏振光而反射P-偏振光的第二偏振分光器、第一反射式电光调制器和第二反射式电光调制器,所述第一反射式电光调制器和第二反射式电光调制器分别位于所述第二偏振分光器相邻的两个出射口; 所述第一偏振分光器和第二偏振分光器为光栅偏振分光器; 所述第一线偏振片与第二线偏振片的透射率τ>50%,视场角>±45°,消光比会100:I ; 所述第一偏振分光器和第二偏振分光器的分光系数 P- polarized light and reflecting or transmitting S- S- polarized light reflected polarized light P- polarized second polarization beam splitter, a first reflective electro-optic modulator and the second reflective electro-optic modulator, said first reflector type electro-optic modulator and the second reflective electro-optic modulator are located adjacent to the second polarization beam splitter two exit port; a first polarization beam splitter and said second polarization beam splitter is a polarizing beam splitter grating; said a first linear polariser and the second polarizing plate line transmittance τ> 50%, viewing angle> ± 45 °, the extinction ratio will be 100: I; the first polarization beam splitter and the second polarization beam splitter spectral coefficients
    Figure CN102253497BC00021
    为反射光消光比大于100 ;透射光消光比大于100。 Reflected light extinction ratio greater than 100; extinction ratio of the transmitted light is greater than 100.
  2. 2.根据权利要求1所述的偏光式立体投影光机引擎,其特征在于:所述第一反射式电光调制器和第二反射式电光调制器为反射式硅基液晶面板。 The polarized stereoscopic projection light machine engine according to claim 1, wherein: said first reflection-type electro-optical modulator and the second reflective electro-optic modulator is a reflective liquid crystal panel silicon.
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