TWI359283B

TWI359283B - Optical system for stereo projection

Info

Publication number: TWI359283B
Application number: TW96136364A
Authority: TW
Inventors: Chien Wen Hsu; Chia Hung Kao; Huan Liang Lo; Sheng Chung Huang
Original assignee: Hon Hai Prec Ind Co Ltd
Priority date: 2007-09-28
Filing date: 2007-09-28
Publication date: 2012-03-01
Also published as: TW200914874A

Description

1359283 loo年.11月οι日核正替換π 、發明說明：【發明所屬之技術領域】 [〇〇〇1] 本發明關於一種投影光學系統，尤其係一種具有立體投影顯示功能之立體投影光學系統。【先前技術】 [0002] 近年來，圖像投影儀，尤其數位投影儀，作為向觀眾顯示多種訊息之工具已經逐漸流行。一般，這些投影儀用於將由電腦生成之圖像投影到螢幕上。對觀看者來說，圖像投影儀投影之圖像通常看起來係平面二維圖像，除圖像本身外無法顯示任何圖像景深訊息。這種顯示可以適用於顯示多種訊息。但是，在某些情·況下，觀看者希望能有比二維顯示能夠更大程度地顯示圖像之景深或結構特徵之投影儀。 [0003] 使二維顯示之圖像能給出圖像景深之一種方式係通過立體地顯示圖像。立體圖像，通常稱為“三維”或“3D” 圖像，在觀看者看來具有深度尺寸。這些圖像包括分開的、疊合的左眼及右眼圖像，這些圖像設置成模仿人之左右眼觀看時，由於人眼睛間隔引起之三維物體表面之微小差別，而具有之景深圖像。左眼及右眼圖像係這樣來顯不*即觀看者之右眼看不到左眼圖像*左眼看不到右眼圖像。這種顯示方式一般借助於觀看者佩戴之光學濾光鏡。 [0004] 通常顯示立體圖像之方式係使用兩個分開之圖像投影系統分別來投影左眼圖像及右眼圖像。而這種系統在成功地用於形成立體圖像之同時，系統之成本和重量則比單 096136364 表單编號Α0101 第4頁/共25頁 1003403731-0 1,359283 修正 1100年11j 01日個投影儀要高很多。而且，兩個投影儀要求光學對準相對困難並比較費時。還有’由於這兩個系統之重量及體積，使這種系統在兩個位置之間移動起來特別困難，還有存在潛在之圖像對準之問題。【發明内容】 [0005] 有鑒於此，有必要提供一種單個的能夠投影立體圖像之立體投影光學系統。 [0006] —種立體投影光學系統，其包括沿光路依次設置之： [0007] —成像引擎，用於發出分別載入有圖像訊息之紅光、綠光及藍光，該紅光及藍光為具有P偏振狀態之線偏振光，該綠光為具有S偏振狀態之線偏振光； [0008] —特定波長偏振轉換元件，接收該紅光、綠光及藍光並根據波長將該綠光之偏振狀態轉換為p偏振狀態而保持該紅光及藍光之偏振狀態；及穿透式光調制H，用於接收經過該特枝長偏振轉換元件之該紅光、綠光及藍光，該穿透式光調制器具有開啟及截止兩個㈣之工作狀態，”透式轴制器處於開啟狀態時’該紅光、綠光及藍光保持3偏振狀態穿過該穿透式光調制ϋ，該穿透式光調制器處於截止狀態時，二、’工光4光及藍光之偏振狀態被轉換成ρ偏振狀態穿過 3亥5亥穿透式光調制器。 096136364 與先前技術相比，上述之立體投影光學线使㈣可通過為穿透絲_緒人訊號使得該料式光調制器具有開啟及截止兩個交替之工作狀態，使得觀看者之左、表單編號Α0101 第5頁/共25頁 1003403731-0 [0010] 1359283 100年.11月01日修正替换亩右眼交替獲得不同偏振狀態之影像，當該輸入訊號的頻率足夠快時，觀看者之左右眼分別戴上檢偏方向相互垂直之兩片偏振片，就可以觀察到立體之圖像訊息。【實施方式】 [0011] 下面將結合附圖，舉以下較佳實施例並配合圖式詳細描述如下。 [0012] 請參閱圖1，為本發明所提供之第一實施例之立體投影光學系統100之結構示意圖。該立體投影光學系統100包括沿光路方向依次設置之一光源元件11、第一、第二分光鏡12a、12b，複數反光鏡13，三個分別與該複數反光鏡 13相對應設置之穿透式空間光調制器14R、14G、14B，一設置於穿透式空間光調制器14R、14G、14B出射光方向上之合光棱鏡16，一設置於穿透式空間光調制器14G與合光稜鏡16之間之偏振轉換元件15，一設置於合光稜鏡 16之出射光方向上之特定波長偏振轉換元件17及一穿透式光調制器18，以及一投影鏡頭19。 [0013] 需要說明的是，在本實施例中，由所述光源元件11、第一、第二分光鏡12a、12b，複數反光鏡13，三個穿透式空間光調制器14R、14G、15B，一偏振轉換元件14以及一合光棱鏡16，一起組成了一成像引擎，其發射出載入有圖像訊息之光。 [0014] 所述光源組件11包括依光路設置之一照明光源111、一積分器112以及偏振光轉換器113。所述照明光源111發射包括顯示彩色圖像所需之紅光（R)、綠光（G)和藍光（B) 之白光。該光源11可以為鹵素燈、金屬鹵化物燈或氙燈 096136364 表單编號 A0101 第 6 頁/共 25 頁 1003403731-0 1,3592831359283 loo year. November οι day nuclear replacement π, invention description: [Technical field of invention] [〇〇〇1] The present invention relates to a projection optical system, in particular to a stereoscopic projection optical system having a stereoscopic projection display function . [Prior Art] [0002] In recent years, image projectors, especially digital projectors, have become popular as tools for displaying a variety of messages to viewers. Typically, these projectors are used to project a computer generated image onto a screen. For the viewer, the image projected by the image projector usually looks like a flat two-dimensional image, and no image depth of field information can be displayed except the image itself. This display can be used to display a variety of messages. However, in some cases, the viewer desires to have a projector that can display the depth of field or structural features of the image to a greater extent than the two-dimensional display. One way to enable an image of a two-dimensional display to give an image depth of field is by displaying the image in a stereoscopic manner. Stereoscopic images, often referred to as "three-dimensional" or "3D" images, have a depth dimension to the viewer. These images include separate, superimposed left and right eye images that are arranged to mimic the slight difference in the surface of a three-dimensional object caused by the spacing of the human eye when viewed from the left and right eyes of the person. . The images of the left and right eyes are such that the viewer's right eye does not see the left eye image * the left eye does not see the right eye image. This type of display is generally by means of an optical filter worn by the viewer. [0004] A method of displaying a stereoscopic image generally uses two separate image projection systems to project a left eye image and a right eye image, respectively. While this system is successfully used to form stereo images, the cost and weight of the system is more than single 096136364 Form No. 1010101 Page 4 / Total 25 Page 1003403731-0 1,359283 Correction 1100 11j 01 Projection The instrument is much higher. Moreover, the two projectors require optical alignment to be relatively difficult and time consuming. Also, due to the weight and volume of the two systems, it is particularly difficult to move such a system between two positions, and there is also the problem of potential image alignment. SUMMARY OF THE INVENTION [0005] In view of the above, it is necessary to provide a single stereoscopic projection optical system capable of projecting a stereoscopic image. [0006] A stereoscopic projection optical system comprising: sequentially arranged along an optical path: [0007] an imaging engine for emitting red, green, and blue light respectively loaded with image information, the red and blue light being Linearly polarized light having a P-polarized state, the green light being linearly polarized light having an S-polarized state; [0008] a specific wavelength polarization conversion element that receives the red, green, and blue light and polarizes the green light according to a wavelength a state in which the state is converted to a p-polarized state to maintain a polarization state of the red and blue light; and a transmissive light modulation H for receiving the red, green, and blue light passing through the special long-wavelength polarization conversion element, the transmissive light The modulator has two (four) working states of opening and closing, "when the transparent shafting device is in an open state, the red, green and blue light maintain a 3-polarized state through the transmissive optical modulation, the transmissive When the light modulator is in the off state, the polarization state of the 'light 4 light and blue light is converted into the p-polarized state through the 3 hai 5 hai transmission light modulator. 096136364 Compared with the prior art, the stereoscopic projection described above Optical line (4) By means of the penetrating wire, the material light modulator has two alternating working states of opening and closing, so that the viewer's left, form number Α 0101, page 5 / total 25 pages 1003403731-0 [0010] 1359283 100 years. On November 1st, the image of the different polarization states is alternately replaced by the right eye of the mu. When the frequency of the input signal is fast enough, the left and right eyes of the viewer respectively wear two polarizing plates whose detection directions are perpendicular to each other. The stereoscopic image information can be observed. [Embodiment] [0012] The following preferred embodiments will be described in detail below with reference to the accompanying drawings. [0012] Please refer to FIG. A schematic diagram of the stereoscopic projection optical system 100 of the first embodiment. The stereoscopic projection optical system 100 includes a light source element 11, a first and a second beam splitter 12a, 12b, a plurality of mirrors 13, and three in sequence along the optical path. The transmissive spatial light modulators 14R, 14G, and 14B respectively disposed corresponding to the plurality of mirrors 13 and the combined light disposed in the direction of the outgoing light of the transmissive spatial light modulators 14R, 14G, and 14B a prism 16 , a polarization conversion element 15 disposed between the transmissive spatial light modulator 14G and the combining aperture 16 , a polarization conversion component 17 and a specific wavelength disposed in the direction of the outgoing light of the combining aperture 16 The transmissive light modulator 18, and a projection lens 19. [0013] In the present embodiment, the light source element 11, the first and second beam splitters 12a, 12b, the plurality of mirrors 13 Three transmissive spatial light modulators 14R, 14G, 15B, a polarization conversion element 14 and a light combining prism 16 together form an imaging engine that emits light loaded with image information. [0014] The light source assembly 11 includes an illumination source 111, an integrator 112, and a polarization converter 113 disposed in accordance with the optical path. The illumination source 111 emits white light including red (R), green (G), and blue (B) required to display a color image. The light source 11 can be a halogen lamp, a metal halide lamp or a xenon lamp 096136364 Form No. A0101 Page 6 of 25 1003403731-0 1,359283

100年.11.月01日梭正替換頁等。在本實施例中，該光源11為i素燈。所述積分器112 用來均勻化及有效地使用光源11發出之光。所述偏振光轉換器113用於將入射白光轉換成同一偏振狀態之光。在本實施例中，該偏振光轉換器113將入射白光轉換成S偏振光，並將該S偏振白光作為出射光輸出。 [0015] 所述第一分光鏡12a用於將來自偏振光轉換器113之出射光中之藍光B分離出來，其反射分離出來之藍光B而透射混合有紅光R及綠光G之混合光。 [0016] 所述第二分光鏡12b用於將第一分光鏡12a出射之混合有紅光R及綠光G之混合光分離為紅光R及綠光G，其反射分離出來之綠光G而透射紅光R。 [0017] 所述複數反光鏡13分別設置在所述穿透式空間光調制器 14R、14G、14B與第一、第二分光鏡12a、12b之間，用於將第一、第二分光鏡12a、12b出射之紅光R、綠光G及藍光B耦合到所對應之穿选式空間光調制器14R、14G、 14B 中。 [0018] 所述穿透式空間光調制器14R、14G、14B之工作原理都是一樣的，下面以穿透式空間光調制器14R為例來說明其工作原理。 [0019] 該穿透式空間光調制器14R可以為液晶顯示裝置（L i qu i d Crystal Dispaly，LCD)。所述穿透式空間光調制器 14R通過控制輸入光之偏振狀態來調制入射光並給入射光加入圖像訊息，形成包括該圖像訊息之經過調制之出射光。所述圖像訊息可以為所述穿透式空間光調制器14R所 096136364 表單編號 A0101 第 7 頁/共 25 頁. 1003403731-0 1359283 100年.11月01日梭正替換w 載入之控制訊號電壓，該控制訊號電壓直接控制薄膜電晶體的開關狀癌*再利用該薄膜電晶體來控制所述液晶夯子的偏轉狀態，而液晶分子具有明顯之光學各向異性，能夠控制來自入射光之光線，從而實現為入射光載入圖像訊號之目的。在本實施例中，該所述穿透式空間光調制器14R對入射之S偏振光進行調制，並在所述S偏振光上疊加圖像訊息，以產生一包括圖像訊息之出射光，即包括有圖像訊息之P偏振光。100 years.11. On the 01st of the month, the shuttle is replacing the page. In this embodiment, the light source 11 is an i-lamp. The integrator 112 is used to homogenize and effectively use the light emitted by the light source 11. The polarization converter 113 is for converting incident white light into light of the same polarization state. In the present embodiment, the polarization converter 113 converts incident white light into S-polarized light, and outputs the S-polarized white light as outgoing light. [0015] The first beam splitter 12a is configured to separate the blue light B out of the light emitted from the polarization converter 113, and reflect the separated blue light B to transmit the mixed light mixed with the red light R and the green light G. . [0016] The second beam splitter 12b is configured to separate the mixed light of the red light R and the green light G, which is emitted by the first beam splitter 12a, into red light R and green light G, and reflect the separated green light G. And transmits red light R. [0017] The plurality of mirrors 13 are respectively disposed between the transmissive spatial light modulators 14R, 14G, 14B and the first and second beam splitters 12a, 12b for using the first and second beam splitters The red light R, the green light G, and the blue light B emitted from 12a, 12b are coupled into the corresponding through-space light modulators 14R, 14G, 14B. [0018] The working principles of the transmissive spatial light modulators 14R, 14G, and 14B are all the same. The working principle of the transmissive spatial light modulator 14R is exemplified below. [0019] The transmissive spatial light modulator 14R may be a liquid crystal display device (LCD). The transmissive spatial light modulator 14R modulates the incident light by controlling the polarization state of the input light and adds an image message to the incident light to form modulated modulated light including the image information. The image message may be 096136364 of the transmissive spatial light modulator 14R Form No. A0101 Page 7 of 25 1003403731-0 1359283 100. November 01 Shuttle is replacing w Loading control signal Voltage, the control signal voltage directly controls the switch-like cancer of the thin film transistor. The thin film transistor is used to control the deflection state of the liquid crystal dice, and the liquid crystal molecules have obvious optical anisotropy and can control the incident light. Light, which achieves the purpose of loading image signals into incident light. In this embodiment, the transmissive spatial light modulator 14R modulates incident S-polarized light and superimposes an image message on the S-polarized light to generate an outgoing light including an image message. That is, P-polarized light with image information is included.

[0020] 同理，所述穿透式空間光調制器14G、14B分別出射疊加有圖像訊息之P偏振狀態之綠光G及藍光B。 [0021] 所述偏振轉換元件15設置於所述穿透式空間光調制器14G 與合光稜鏡16之光路之間，用於將所述穿透式空間光調制器14G之P偏振狀態之綠光G轉換為S偏振狀態之綠光G，以穿過所述合光棱鏡16。該偏振轉換元件15可以為通過拉伸等方法獲得之具有光學各向異性之有機薄膜。其分為二分之一波片與四分之一波片。當光束通過二分之一波片時，只通過一次即可該光束之振動方向旋轉90度，而對於四分之一波片，要反復經過四分之一波片兩次才可以將該光束之振動方向旋轉9 0度。在本實施例中，所使用之偏振轉換元件15為二分之一波片，其可以通過將兩個四分之一波片疊加而成。 [0022] 所述合光稜鏡16具有混合預定偏振分量之彩色光，以發射被混合之彩色光之功能。該合光稜鏡16具有三個入射面及一個出射面。該合光棱鏡16係一種具有兩個相互垂直之平面之光學組件，即第一平面161及第二平面162。 096136364 表單编號A0101 第8頁/共25頁 1003403731-0 1,359283 100.年.11.为〇l·日惨正靜頁] 第一平面161係一個二向色濾光片，該二向色濾光片被配置成用來透射具有第一波長之光，而反射具有第二波長之光，在本實施例中，透射綠光G，反射藍光B。同理，與所述第一平面161垂直之第二平面162也具有一個二向色遽光片’其透射綠光G，反射紅光R。當然，可以理解的是，該合光稜鏡16也具有同一般偏振分束器對偏振方向不同之光進行分離之功能。 [0023] 所述特定波長偏振轉換元件17是由複數層延遲薄膜組成 • 之疊片，其可無損耗地將一個頻帶内，即特定波長的偏振光轉換為與其正交之偏振光，該特定波長偏振轉換元件17可以將一定波段之任意顏色之入射光如紅光r、綠光 G以及藍光B之偏振方向轉換為與其正交之偏振出射光。在本實施例中，該特定波長偏振轉換元件17用來將入射之綠光G之偏振方向轉換為與其正交之偏振光出射綠光G ，而其他顏色之光如紅光R、藍光β直接通過，其偏振方向不會發生偏轉。 # [0024] 所述穿透式光調制器18設置於所述特定波長偏振轉換元件17出射光路上。該穿透式光調制器18可以為液晶顯示裝置（Liquid Crystal Display，LCD)。通過為該穿透式光調制器18輸入脈衝訊號來控制該穿透式光調制器 18之開啟與截止。如圖3所示，為輸入穿透式光調制器18 之輸入訊號以及相對於左右眼輸出光之偏振狀態之波形圖。在本實施例中，所述穿透式光調制器18按照圖3所示之輸入訊號波形圖開啟或截止，從而交替為左右眼提供不同偏振方向之S偏振光及P偏振光◊當為該穿透式光調 096136364 表單編號A0101 第9頁/共25頁 1003403731-0 1359283 1100年.11月Ol·日梭正制器18輸入該訊號時，該穿透式光調制器18便可交替輸出S偏振光或P偏振光以提供觀看者左右眼之不同偏振方向之光。可以理解的是，該輸入訊號之週期是可以調整的。通過穿透式光調制器18之開啟與截止可以控制所輸入偏振光之偏振方向，在本實施例中，輸入穿透式光調制器18的係P偏振光，下以p偏振光為例，來說明該穿透式光調制器18之作用原理。當然，可以想到的是，對s偏振光的作用與P偏振光相同。 [0025] 在s亥穿透式光調制器18開啟時，如圖1所示，該p偏振光直接穿過s亥穿透式光調制器18而不會對該p偏振光的偏振狀感進行調制。但是，在穿透式光調制器丨8截止時，如圖2所示，就會對穿過之p偏振光進行調制，即把輸入之p 偏振光調制為S偏振光輸出，從而可以交替地為觀看者左右眼提供不同偏振方向之光。[0020] Similarly, the transmissive spatial light modulators 14G, 14B respectively emit green light G and blue light B in a P-polarized state in which image information is superimposed. [0021] The polarization conversion element 15 is disposed between the optical path of the transmissive spatial light modulator 14G and the combining aperture 16 for P-polarization state of the transmissive spatial light modulator 14G. The green light G is converted into the green light G of the S-polarized state to pass through the light combining prism 16. The polarization conversion element 15 may be an organic film having optical anisotropy obtained by a method such as stretching. It is divided into a half wave plate and a quarter wave plate. When the beam passes through the half-wave plate, the vibration direction of the beam is rotated by 90 degrees only once, and for the quarter-wave plate, the beam is repeated twice after the quarter-wave plate. The direction of vibration is rotated by 90 degrees. In the present embodiment, the polarization conversion element 15 used is a half-wave plate which can be formed by superposing two quarter-wave plates. [0022] The light combining aperture 16 has a function of mixing colored light of a predetermined polarization component to emit the mixed colored light. The light combining aperture 16 has three incident faces and an exit face. The light combining prism 16 is an optical component having two planes perpendicular to each other, i.e., a first plane 161 and a second plane 162. 096136364 Form No. A0101 Page 8 of 25 1003403731-0 1,359283 100. Year 11.11. 〇l·日惨正静页] The first plane 161 is a dichroic filter, the two directions The color filter is configured to transmit light having a first wavelength and to reflect light having a second wavelength, in the present embodiment, transmitting green light G, reflecting blue light B. Similarly, the second plane 162, which is perpendicular to the first plane 161, also has a dichroic sheeting that transmits green light G and reflects red light R. Of course, it can be understood that the combined aperture 16 also has the function of separating the light of different polarization directions from the general polarization beam splitter. [0023] The specific wavelength polarization conversion element 17 is a laminate composed of a plurality of retardation films, which can convert a polarized light of a specific frequency band, that is, a polarized light of a specific wavelength, into a frequency band orthogonal thereto without loss. The wavelength polarization conversion element 17 can convert the polarization directions of incident light of any color in a certain wavelength band, such as red light r, green light G, and blue light B, into polarized outgoing light orthogonal thereto. In this embodiment, the specific wavelength polarization conversion element 17 is used to convert the polarization direction of the incident green light G into the polarized light outgoing green light G orthogonal thereto, and the other colors such as the red light R and the blue light β are directly By passing, its polarization direction does not deflect. [0024] The transmissive optical modulator 18 is disposed on the outgoing optical path of the polarization conversion element 17 of the specific wavelength. The transmissive light modulator 18 can be a liquid crystal display (LCD). The turn-on and turn-off of the transmissive optical modulator 18 is controlled by inputting a pulse signal to the transmissive optical modulator 18. As shown in Fig. 3, the input signal of the input transmissive optical modulator 18 and the waveform of the polarization state of the output light with respect to the left and right eyes are shown. In this embodiment, the transmissive optical modulator 18 is turned on or off according to the input signal waveform diagram shown in FIG. 3, thereby alternately providing S-polarized light and P-polarized light with different polarization directions for the left and right eyes. Transmissive light modulator 096136364 Form No. A0101 Page 9 / Total 25 pages 1003403731-0 1359283 When the input of the signal is input by the Ol·Riso controller 18 in November 1100, the transmissive light modulator 18 can be alternately output. S-polarized or P-polarized light to provide light of different polarization directions of the left and right eyes of the viewer. It can be understood that the period of the input signal can be adjusted. The polarization direction of the input polarized light can be controlled by the opening and closing of the transmissive light modulator 18. In the present embodiment, the P-polarized light of the transmissive optical modulator 18 is input, and the p-polarized light is taken as an example. The principle of operation of the transmissive optical modulator 18 will be described. Of course, it is conceivable that the effect on the s-polarized light is the same as that of the P-polarized light. [0025] When the s-through transmissive light modulator 18 is turned on, as shown in FIG. 1, the p-polarized light directly passes through the s-through light modulator 18 without a sense of polarization of the p-polarized light. Make modulation. However, when the transmissive optical modulator 丨8 is turned off, as shown in FIG. 2, the p-polarized light that passes through is modulated, that is, the input p-polarized light is modulated into an S-polarized light output, thereby alternately Provides light of different polarization directions for the left and right eyes of the viewer.

[0026] 可以理解的是，為了進一步提高系統之對比度，還可以在上述之立體投影光學系統中加入一偏振片2〇，如圖4所不，該偏振片20可以讓一定偏振方向之光通過，而吸收其他偏振方向之光，例如讓p偏振光通過，而吸收5偏振光或者讓S偏振光通過，而吸收p偏振光。該偏振片別設置於所述特定波長偏振轉換元件17與光調制器18之間。[0026] It can be understood that, in order to further improve the contrast of the system, a polarizing plate 2 can be added to the above-mentioned stereoscopic projection optical system. As shown in FIG. 4, the polarizing plate 20 can pass light of a certain polarization direction. While absorbing light of other polarization directions, for example, passing p-polarized light, absorbing 5 polarized light or passing S-polarized light, and absorbing p-polarized light. The polarizer is disposed between the specific wavelength polarization conversion element 17 and the light modulator 18.

[0027] 請參閱圖5，為本發明第二實施例之提供之一種投影光學系統200之結構示意圖β該立體投影光學系統2〇〇包括沿光路方向依次設置之一光源組件21、第一、第二分光鏡22a 22b ’ 一反光鏡23，三個偏振分束器24r、24G、 24B，三個分別與偏振分束器24R、24G、24B相對應設置 096136364 表單编號A0101 第1〇頁/共25頁 1003403731-0 100年.11·月01日修正替ίίί頁之反射式空間光調制器25R、25G、25Β ’ 一設置於反射式工間光調制器25R、25G、25Β出射光方向上之合光棱 ο c y ’ 一個設置於穿透式空間光調制器25G與合光棱鏡26 之間之偏振轉換元件27，一個設置於合光棱鏡26之出射光方向上之特定波長偏振轉換元件28及一個穿透式光調制态29，以及一投影鏡頭202。 [0028] 該坌-奋禾一貢施例與第一實施例之不同點在於成像引擎之組成結構不同，在第二實施例之光學組件為反射式空間光 φ 調制器25R、25G、25B，該反射式空間光調制器25R、 G 25B可以為石夕基液晶（Liquid Crystal on Sil-iec)n’ LC〇S)顯示面板。該反射式空間光調制器25R、 25G、25B所疊加之圖像訊息可以為該LC〇s所載入之控制訊號電壓’該控制訊號電壓直接控制薄膜電晶體之開關狀態’再利用該薄膜電晶體來控制所述液晶分子之偏轉狀態，而液晶分子具有明顯之光學各向異性，能夠控制來自入射光之光線，從而實現為入射光載入圖像訊號之 • 目的。 [0029] 另外因所用到的為投影光束疊加圖像訊息之光學元件為反射式空間光調制器25R、25G、25B，因此配合該反射式空間光調制器25R、25G ' 25B之光路傳播，相應設置有三個偏振分束器24R、24G、24B。該偏振分束器24R、 24G、24B讓相對應之反射式空間光調制器25R、25G、 25B之入射光穿過，而反射經反射式空間光調制器25R、5 is a schematic structural diagram of a projection optical system 200 according to a second embodiment of the present invention. The stereoscopic projection optical system 2 includes a light source assembly 21 disposed in the optical path direction. The second beam splitter 22a 22b' a mirror 23, three polarization beam splitters 24r, 24G, 24B, three respectively corresponding to the polarization beam splitters 24R, 24G, 24B are set 096136364 Form No. A0101 Page 1 / A total of 25 pages of 1003403731-0 100 years. 11th of January 1st, the correction of the reflective spatial light modulators 25R, 25G, 25Β ' is set in the direction of the light emitted by the reflective inter-planar light modulators 25R, 25G, 25 The light combining edge cy cy ' is a polarization conversion element 27 disposed between the transmissive spatial light modulator 25G and the light combining prism 26, and a specific wavelength polarization conversion element 28 disposed in the direction of the outgoing light of the light combining prism 26. And a transmissive optical modulation state 29, and a projection lens 202. [0028] The 坌-Feihe tribute example differs from the first embodiment in that the composition of the imaging engine is different, and the optical components in the second embodiment are reflective spatial light φ modulators 25R, 25G, 25B, The reflective spatial light modulators 25R, G 25B may be Liquid Crystal on Sil- ic (n' LC 〇 S) display panels. The image information superimposed by the reflective spatial light modulators 25R, 25G, and 25B may be a control signal voltage loaded by the LC〇s. The control signal voltage directly controls the switching state of the thin film transistor. The crystal controls the deflection state of the liquid crystal molecules, and the liquid crystal molecules have obvious optical anisotropy, and can control the light from the incident light, thereby achieving the purpose of loading the image signal into the incident light. [0029] In addition, since the optical elements used for superimposing the image information of the projection beam are the reflective spatial light modulators 25R, 25G, and 25B, the optical path propagation of the reflective spatial light modulators 25R, 25G' 25B is matched, correspondingly Three polarization beam splitters 24R, 24G, 24B are provided. The polarizing beam splitters 24R, 24G, and 24B pass incident light of the corresponding reflective spatial light modulators 25R, 25G, and 25B, and are reflected by the reflective spatial light modulator 25R,

25G、25B調制後之出射光。在本實施例中，S偏振光穿過相應之偏振分束器24R、24G、24B到達反射式調制器25R 096136364 表單编號A0101 第11頁/共25頁 1003403731-0 1359283 loo年.11.月οι日修正脊換食、25G、25B後’經反射式調制器25R、25G、25B調制後 ’該S偏振光變成了P偏振光，而偏振分束器反射該p偏振光，從而使得該疊加有圖像訊息之紅光r、綠光G及藍光b 射入合光稜鏡26。所述偏振分束器24R、24G、24B可以為金屬拇格型偏振片（Wire Grid Polarizer，簡稱WGP 偏振片）與偏振分光稜鏡中的一種》 [0030] 可以理解的是，紅光R、綠光G及藍光B在其他光學組件如特定波長偏振轉換元件28中之傳輸光路與第一實施例相同0 [0031] 同理，為了進一步提高系統之對比度，還可以在第二實施例之立體投影光學系統200中加入一個偏振片2〇丨，其設置位置與第一實施例相同》 · [0032] 請參閱圖6，為本發明第三實施例之提供之一種投影光學系統300之結構示意圖。該投影光學系統300之成像弓丨擎包括沿光路依次設置之一光源組件31，一對藍光b之偏振方向轉換之藍光偏振轉換元件32B，二個對紅光R之偏振方向轉換之紅光偏振轉換元件32R，四個偏振分束器33a ®25G, 25B modulated light. In the present embodiment, the S-polarized light passes through the respective polarization beam splitters 24R, 24G, 24B to the reflective modulator 25R 096136364. Form No. A0101 Page 11 of 25 Page 1003403731-0 1359283 loo Year 11.11. After the correction of the ridges, 25G, 25B, 'after the modulation by the reflection modulators 25R, 25G, 25B', the S-polarized light becomes P-polarized light, and the polarization beam splitter reflects the p-polarized light, thereby making the superposition The red light r, the green light G, and the blue light b having the image information are incident on the combined light 稜鏡 26. The polarization beam splitter 24R, 24G, 24B may be one of a metal grid polarizer (WGP polarizer) and a polarization beam splitter. [0030] It can be understood that the red light R, The transmission optical paths of the green light G and the blue light B in other optical components such as the specific wavelength polarization conversion element 28 are the same as in the first embodiment. [0031] Similarly, in order to further improve the contrast of the system, the stereoscopic shape in the second embodiment can also be used. A polarizing plate 2 is added to the projection optical system 200, and its setting position is the same as that of the first embodiment. [0032] Please refer to FIG. 6, which is a schematic structural diagram of a projection optical system 300 according to a third embodiment of the present invention. . The imaging optical system of the projection optical system 300 includes a light source assembly 31 disposed along the optical path, a blue light polarization conversion element 32B for converting a polarization direction of the blue light b, and two red light polarizations for converting the polarization direction of the red light R. Conversion element 32R, four polarization beam splitters 33a ®

' 33b、33c、33d，三個反射式空間光調制器34R、34B 、34G。同第一、第二實施例，該投影光學系統3〇〇也包括一特定波長偏振轉換元件35，一設置於所述特定波長偏振轉換元件35出射光路上之偏振片37，一穿透式光調制器36以及一投影鏡頭38 » [0033] 所述藍光偏振轉換元件32B及紅光偏振轉換元件32R與第一實施例之特定波長偏振轉換元件丨7結構與工作原理相 096136364 表單編號A0101 第12頁/共25頁 1003403731-0 1.359283 _一 _ 100年.11月01日修正替gj-頁似’唯一不同的是，該藍光偏振轉換元件32B及紅光偏振轉換元件32R分別係將入射之藍光B及紅光R轉換為與其偏振狀態垂直之光並發射。 [0034] 其他的光學組件之結構及工作原理在第一及第二實施例中已陳述，在此不再贅述《下面對圖6中光束所行進之光路以及所列之光學組件對該光束所起之作用進行說明。 [0035] 當光源31所發出之S偏振光經過藍光偏振轉換元件32B時 ’所對應之藍光B的偏振方向被轉換，即轉換為p偏振光。該處於P偏振之藍光B透過兩個偏振分束器333和33b到達反射式空間光調制器34B，經該反射式空間光調制器 34B調制，並發射出載入有圖.像訊息之s偏振光。該處於5 偏振之藍光B經偏振分束器33b及33c反射後出射。在這裏需要說明的是’偏振分束器33c設置在偏振分束器33b、 33d之出射光之光路上。 [0036] 沒有被藍光偏振轉換元件32B偏振轉換之紅光r或綠光g仍處於S偏振狀態並到達偏振分束器33a，被該偏振分束器 _ 33a反射出去。所述偏振分束器33d設置在偏振分束器 33a之反射光之光路上’且在偏振分束器338與33(1之間設置有紅光偏振轉換元件3 2R以將處於s偏振的紅光R轉換為P偏振之紅光R，從而透過偏振分束器33d到達反射式空間光調制器34R ^經反射式空間光調制器34R對紅光R調制 ’並反射出載入有圖像訊息之紅光r，即處於5偏振之紅光。所述偏振分束器33c設置在偏振分束器33(^之出射光之光路上，且在偏振分束器33c與33d之間設置有紅光偏振轉換元件32R以將處於S偏振之紅光R轉換為p偏振之紅 096136364 表單编號A0101 第13頁/共25頁 innq 1359283 100年.11-月01日梭正替®ΐίπ 光R，從而透過偏振分束器33 c發射出去。 [0037]沒有被紅光偏振轉換元件32R偏振轉換綠光G經偏振分束器33d反射到達反射式空間光調制器34G。經反射式空間光調制器34G對綠光G調制，並反射出載入有圖像訊息之綠光G ’即處於P偏振之綠光(j。該處於p偏振之綠光g透過偏振分束器33c、33d及特定波長偏振轉換元件32R後發射出去。 [0038] 可以理解的是，此處對藍光B及紅光R進行偏振轉換之藍光偏振轉換元件32B及紅光偏振轉換元件32R之位置可以互換，同時還可以係對綠光G之偏振轉換。當然，當對藍光B及紅光R進行偏振轉換之藍光偏振轉換元件32B及紅光偏振轉換元件32R之位置互換以後，相對應之反射式空間光調制器34B、34R之位置也需要互換。 [0039] 特定波長偏振轉換元件35，偏振片37以及穿透式光調制器36對從偏振分束器33c出射之處於P偏振之紅光R、綠光 G以及處於S偏振之藍光B之作用及傳輸光路與第一、第二實施例相同。 [0040] 上述之立體投影光學系統使用時可通過為穿透式光調制器輸入訊號使得該穿透式光調制器具有開啟及截止兩個交替之工作狀態’使得觀看者之左、右目艮交替獲得不同偏振狀態之影像’當該輸入訊號之頻率足夠快時，觀看者之左右眼分別戴上檢偏方向相互垂直之兩片偏振片，就可以觀察到立體之圖像訊息。 [0041]綜上所述’本發明符合發明專利要件，爰依法提出專利 1003403731-0 096136364 表單编號A0101 第14頁/共25頁 1.359283 10 0年.11.月01日梭正_頁申請。惟，以上所述者僅為本發明之較佳實施方式，本發明之範圍並不以上述實施方式為限，舉凡熟悉本案技藝之人士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範圍内。【圖式簡單說明】 [0042] 圖1係本發明第一實施例提供之立體投影光學系統在所述穿透式光調制器開啟時之結構示意圖。'33b, 33c, 33d, three reflective spatial light modulators 34R, 34B, 34G. In the first and second embodiments, the projection optical system 3A also includes a specific wavelength polarization conversion element 35, a polarizing plate 37 disposed on the optical path of the specific wavelength polarization conversion element 35, and a transmissive light. Modulator 36 and a projection lens 38 » [0033] The blue polarization conversion element 32B and the red polarization conversion element 32R and the specific wavelength polarization conversion element 第一7 of the first embodiment structure and operation principle 096136364 Form No. A0101 No. 12 Page / Total 25 pages 1003403731-0 1.359283 _ a _ 100 years. November 01 correction for the gj-page like 'the only difference is that the blue polarization conversion element 32B and the red polarization conversion element 32R respectively will be incident blue light B and red light R are converted into light perpendicular to their polarization state and emitted. [0034] The structure and working principle of other optical components have been stated in the first and second embodiments, and the optical path traveled by the light beam in FIG. 6 and the listed optical components are not described herein. The role played is explained. [0035] When the S-polarized light emitted by the light source 31 passes through the blue polarization conversion element 32B, the polarization direction of the blue light B corresponding to the light source is converted, that is, converted into p-polarized light. The P-polarized blue light B passes through the two polarization beam splitters 333 and 33b to the reflective spatial light modulator 34B, is modulated by the reflective spatial light modulator 34B, and emits s-polarized light loaded with a picture image. . The blue light B of 5 polarization is reflected by the polarization beam splitters 33b and 33c and then exits. Here, it is to be noted that the 'polarizing beam splitter 33c is disposed on the optical path of the outgoing light of the polarization beam splitters 33b, 33d. The red light r or the green light g which is not polarized by the blue polarization conversion element 32B is still in the S polarization state and reaches the polarization beam splitter 33a, and is reflected by the polarization beam splitter _ 33a. The polarization beam splitter 33d is disposed on the optical path of the reflected light of the polarization beam splitter 33a and is provided with a red light polarization conversion element 3 2R between the polarization beam splitters 338 and 33 (1 to be s-polarized red The light R is converted into a P-polarized red light R, thereby passing through the polarization beam splitter 33d to the reflective spatial light modulator 34R. ^ The red light R is modulated by the reflective spatial light modulator 34R and reflected and loaded with image information. The red light r, that is, the red light of 5 polarization. The polarization beam splitter 33c is disposed on the optical path of the polarizing beam splitter 33 (wherein the light beam is emitted, and red is disposed between the polarization beam splitters 33c and 33d). The light polarization conversion element 32R converts the red light R in the S polarization to the red polarization 096136364. Form No. A0101 Page 13 of 25 Innq 1359283 100.11-Month 01 Shuttle Positive® ΐίπ Light R, Thereby, it is emitted through the polarization beam splitter 33c. [0037] The polarization conversion green light G is not reflected by the polarization beam splitter 33d by the red polarization conversion element 32R to the reflective spatial light modulator 34G. The reflective spatial light modulator 34G modulates green light G and reflects the green light G ' loaded with image information P-polarized green light (j. The p-polarized green light g is transmitted through the polarization beam splitters 33c, 33d and the specific wavelength polarization conversion element 32R. [0038] It can be understood that here the blue light B and red The positions of the blue polarization conversion element 32B and the red polarization conversion element 32R for which the light R is polarization-converted may be interchanged, and may also be polarization conversion of the green light G. Of course, when the blue light B and the red light R are polarization-converted blue light After the positions of the polarization conversion element 32B and the red polarization conversion element 32R are interchanged, the positions of the corresponding reflective spatial light modulators 34B, 34R also need to be interchanged. [0039] The specific wavelength polarization conversion element 35, the polarizer 37 and the penetration The effect of the mode light modulator 36 on the P-polarized red light R, the green light G, and the S-polarized blue light B emitted from the polarization beam splitter 33c and the transmission optical path are the same as in the first and second embodiments. The stereoscopic projection optical system described above can be used to input signals to the transmissive optical modulator such that the transmissive optical modulator has two alternating working states of turning on and off 'making the viewer's left and right.艮Alternatively obtaining images of different polarization states. When the frequency of the input signal is fast enough, the left and right eyes of the viewer wear two polarizing plates perpendicular to each other to detect the stereoscopic image information. [0041 In summary, the invention conforms to the patent requirements of the invention, and the patent is filed according to law 1003403731-0 096136364 Form No. A0101 Page 14/Total 25 Page 1.359283 10 0.11.月01日梭正_Page application. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention should be covered. It is within the scope of the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0042] FIG. 1 is a schematic view showing the structure of a stereoscopic projection optical system according to a first embodiment of the present invention when the transmissive optical modulator is turned on.

[0043] 圖2係圖1之立體投影光學系統在所述穿透式光調制器截止時之結構示意圖。 [0044] 圖3係圖1之所述穿透式光調制器之輸入訊號以及相對於左右眼輸出之光之偏振狀態之波形圖。 [0045] 圖4係在圖1之立體投影光學系統設置之一偏振片之結構示意圖。 [0046] 圖5是本發明第二實施例之立體投影光學系統之結構示意圖。 [0047] 圖6是本發明第三實施例之立體投影光學系統之結構示意圖。【主要元件符號說明】 [0048] 立體投影光學系統：100、200、300 [0049] 光源組件：11、21、31 [0050] 照明光源：111 [0051] 色輪：112 096136364 表單编號A0101 第15頁/共25頁 1003403731-02 is a schematic structural view of the stereoscopic projection optical system of FIG. 1 when the transmissive optical modulator is turned off. 3 is a waveform diagram of input signals of the transmissive optical modulator of FIG. 1 and polarization states of light outputted with respect to the left and right eyes. 4 is a schematic view showing the structure of one polarizing plate provided in the stereoscopic projection optical system of FIG. 1. 5 is a schematic structural view of a stereoscopic projection optical system according to a second embodiment of the present invention. 6 is a schematic structural view of a stereoscopic projection optical system according to a third embodiment of the present invention. [Main component symbol description] [0048] Stereoscopic projection optical system: 100, 200, 300 [0049] Light source component: 11, 21, 31 [0050] Illumination light source: 111 [0051] Color wheel: 112 096136364 Form No. A0101 15 pages / total 25 pages 1003403731-0

1359283 100年.11.月01日核正替換亩 [0052] 積分器：113 [0053] 反射鏡：13、23 [0054] 偏振轉換元件：15、27 [0055] 合光棱鏡：16、26 [0056] 投影鏡頭：19、202、38 [0057] 偏光片：20、2(Π、37 [0058] 第一、第二分光鏡：12a、12b、22a ' 22b Λ [0059] 穿透式空間光調制器：14R、14B、14G [0060] 偏振分束器：24R、24B、24G、33a、33b、33c、33d [0061] 反射式空間光調制器：25R、25B、25G ' 34R、34B、 34G [0062] 第一、第二平面：161、162 [0063] 特定波長偏振轉換元件：17、35 [0064] 穿透式光調制器：18、29、36 1 [0065] 藍光偏振轉換元件：32B [0066] 紅光偏振轉換元件：32R 096136364 表單编號A0101 第16頁/共25頁 1003403731-01359283 100 years. 11.1 month 1 nuclear replacement replacement [0052] integrator: 113 [0053] Mirror: 13, 23 [0054] Polarization conversion element: 15, 27 [0055] Light combining prism: 16, 26 [ 0056] Projection lens: 19, 202, 38 [0057] Polarizer: 20, 2 (Π, 37 [0058] First and second beamsplitters: 12a, 12b, 22a ' 22b Λ [0059] Transmissive spatial light Modulator: 14R, 14B, 14G [0060] Polarization beam splitter: 24R, 24B, 24G, 33a, 33b, 33c, 33d [0061] Reflective spatial light modulator: 25R, 25B, 25G '34R, 34B, 34G First and second planes: 161, 162 [0063] Specific wavelength polarization conversion elements: 17, 35 [0064] Transmissive light modulators: 18, 29, 36 1 [0065] Blue light polarization conversion elements: 32B [0066] Red Light Polarization Conversion Element: 32R 096136364 Form No. A0101 Page 16 of 25 1003403731-0

Claims

•100年.11.月01日赃_頁申請專利範圍：一種立體投影光學系統，其包括：一成像引擎，用於發出分別加載有圖像訊息之紅光、綠光及藍光，該紅光及藍光為具有p偏振狀態之線偏振光，該綠光為具有S偏振狀態之線偏振光； —特定波長偏振轉換元件，用於接收該紅光、綠光及藍光並根據波長將該綠光之偏振狀態轉換為P偏振狀態而保持該紅光及藍光之偏振狀態；及一穿透式光調制器’用於接收經過該特定波長偏振轉換元件之該紅光、綠光及藍光，該穿透式光調制器具有開啟及截止兩個交替之工作狀態，該穿透式光調制.器處於開啟狀態時，該紅光、綠光及藍光保持3偏振狀態穿過該穿透式光調制器’該穿透式光調制器處於截止狀態時，該紅光、綠光及藍光之偏振狀態被轉換成p偏振狀態穿過該該穿透式光調制器。如申请專利範圍第1項所述之立體投影光學系統，其中，所述成像引擎包括-用於發出具有s偏振狀態之出射光之光源組件、设置於光源組件出射光光路上用於將出射光分離成紅光、綠光及藍光之第一、第二分光鏡，三個設置於第-' 第二分錢出射光光路上之穿透式空間光調制器，複數分別與穿透式空間光調制器相對應設置之反光鏡，一設置於穿透式空間光調制器出射光方向上之合光稜鏡，— 設置於穿透式空間光調制器與合光棱鏡之間之偏振轉換元件。如申請專利範圍第2項所述之立體投影光學系統，其中， 1003403731-0 表單编號删i * 17 I/# 25 f 1359283 1100年11月01日修正替換食所述穿透式空間光調制器為液晶顯示裝置。 4 .如申請專利範圍第1項所述之立體投影光學系統，其中，所述成像引擎包括一用於發出具有S偏振狀態之出射光之光源組件、設置於光源組件出射光光路上用於將出射光分離成紅光、綠光及藍光之第一、第二分光鏡，三個分別設置於第一、第二分光鏡出射光光路上之偏振分束器，三個分別與偏振分束器相對應設置之反射式空間光調制器，一個設置於反射式空間光調制器出射光方向上之合光棱鏡，一設置於穿透式空間光調制器與合光棱鏡之間之偏振轉換元件β _ 5.如申請專利範圍第4項所述之立體投影光學系統，其中，所述偏振分束器為偏振分光稜鏡。 6 .如申請專利範圍第4項所述之立體投影光學系統，其中，所述偏振分束器為金屬柵格型偏振片》 7 .如申請專利範圍第1項所述之立體投影光學系統，其中，所述成像引擎包括沿光路依次設置之一光源元件，一對藍光之偏振方向轉換之藍光偏振轉換元件，二個對紅光之偏振方向轉換之紅光偏振轉換元件，四個依次設置於所述藍 · 光偏振轉換元件、紅光偏振轉換元件之偏振分束器，三個分別與藍光偏振轉換元件、紅光偏振轉換元件相對應設置之反射式空間光調制器。 8. 如申請專利範圍第7項所述之立體投影光學系統，其中，所述偏振分束器為偏振分光棱鏡。 9. 如申請專利範圍第7項所述之立體投影光學系統，其中，所述偏振分束器為金屬栅格型偏振片》 10 .如申請專利範圍第4或7項所述之立體投影光學系統，其中 096136364 表單編號Α0101 第18頁/共25頁 1003403731-0 1359283 10 0年11.月01日核正_頁，所述反射式空間光調制器為矽基液晶面板。 11 如申請專利範圍第1項所述之立體投影光學系統，其中，所述立體投影光學系統還包括一設置於所述穿透式光調制器之出射光方向上之投影鏡頭，用於將出射光所形成之圖像放大。• 100 years.11.月01日赃Page application patent scope: A stereoscopic projection optical system, comprising: an imaging engine for emitting red, green and blue light respectively loaded with image information, the red light And blue light is linearly polarized light having a p-polarized state, the green light is linearly polarized light having an S-polarized state; - a specific wavelength polarization conversion element for receiving the red, green, and blue light and illuminating the green light according to a wavelength a polarization state is converted to a P-polarization state to maintain a polarization state of the red and blue light; and a transmissive optical modulator is configured to receive the red, green, and blue light passing through the polarization conversion component of the specific wavelength, the wearing The transmissive light modulator has two alternating working states of turning on and off. When the penetrating optical modulator is in an on state, the red, green and blue light maintain a 3-polarized state through the transmissive light modulator. When the transmissive light modulator is in an off state, the polarization states of the red, green and blue light are converted into a p-polarized state through the transmissive light modulator. The stereoscopic projection optical system of claim 1, wherein the imaging engine comprises: a light source assembly for emitting an outgoing light having an s-polarized state, and is disposed on an outgoing light path of the light source assembly for emitting light The first and second beamsplitters separated into red, green and blue light, and three transmissive spatial light modulators disposed on the first-second dichotom exiting light path, respectively, and transmissive spatial light The reflector corresponding to the modulator is a combined aperture disposed in the direction of the light emitted by the transmissive spatial light modulator, and a polarization conversion element disposed between the transmissive spatial light modulator and the light combining prism. The stereoscopic projection optical system as described in claim 2, wherein 1003403731-0 form number is deleted i * 17 I/# 25 f 1359283 1 November 1100 revised replacement food transmissive spatial light modulation The device is a liquid crystal display device. 4. The stereoscopic projection optical system according to claim 1, wherein the imaging engine includes a light source assembly for emitting an outgoing light having an S-polarized state, and is disposed on the light path of the light source assembly for emitting light. The first and second beam splitters are separated into red, green and blue light, three polarization beam splitters respectively arranged on the first and second beamsplitter exit light paths, and three polarization beam splitters respectively Correspondingly disposed reflective spatial light modulator, a light combining prism disposed in the direction of the outgoing light of the reflective spatial light modulator, and a polarization conversion element disposed between the transmissive spatial light modulator and the light combining prism 5. The stereoscopic projection optical system of claim 4, wherein the polarization beam splitter is a polarization splitter. 6. The stereoscopic projection optical system according to claim 4, wherein the polarizing beam splitter is a metal grid type polarizing plate. 7. The stereoscopic projection optical system according to claim 1, Wherein, the imaging engine comprises a light source element arranged in sequence along the optical path, a blue light polarization conversion element for converting a polarization direction of the blue light, and two red light polarization conversion elements for converting the polarization direction of the red light, and the four are sequentially disposed on The blue light polarization conversion element, the polarization beam splitter of the red light polarization conversion element, and three reflective spatial light modulators respectively disposed corresponding to the blue light polarization conversion element and the red light polarization conversion element. 8. The stereoscopic projection optical system according to claim 7, wherein the polarization beam splitter is a polarization beam splitting prism. 9. The stereoscopic projection optical system according to claim 7, wherein the polarizing beam splitter is a metal grid type polarizing plate. 10 . The stereoscopic projection optical according to claim 4 or 7. System, wherein 096136364 Form No. 101 0101 Page 18 / Total 25 Page 1003403731-0 1359283 10 0. 11. On January 01, the reflective spatial light modulator is a 矽-based liquid crystal panel. The stereoscopic projection optical system of claim 1, wherein the stereoscopic projection optical system further comprises a projection lens disposed in an outgoing light direction of the transmissive optical modulator for outputting The image formed by the light is magnified.

096136364 表單編號A0101 第19頁/共25頁 1003403731-0096136364 Form No. A0101 Page 19 of 25 1003403731-0