100年.11月04日核正替換頁 1359284 六、發明說明： 【發明所屬之技術領域】 一 [0001] 本發明關於一種投影光學系統，尤其A種/、有雨對 度之立體投影光學系統° 【先前技術】100 years. November 4th, nuclear replacement page 1392284. VI. Description of the invention: [Technical field of the invention] [0001] The present invention relates to a projection optical system, in particular, a type A/, a stereoscopic projection optical system with rain contrast ° [Prior Art]
[0002] 近年來，圖像投影儀，尤其數位投影儀’作為向觀眾顯 示複數訊息的工具已經逐漸流行。二般’這些技影儀用 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 適用於顯示複數訊息。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。[0002] In recent years, image projectors, especially digital projectors, have become popular as tools for displaying plural messages to viewers. The second is that these cameras are used to project computer-generated images onto the screen. For the viewer, the image projected by the image projector usually appears to be a flat two-dimensional image' and no image depth of field information can be displayed except for the image itself. This display can be used to display complex 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.
[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 的疊合之左眼及右眼圖像，這些圖像設置成模仿乂之 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 顯7^的’即觀看者之右眼看不到左眼@像，左眼看不到 艮圖像it種顯示方式一般借助於觀看者佩戴之光學 據光鏡。 [0004] 096136378 /之立體投影光學祕都包括有-用於將入射 f不同偏振方向之偏振分束器以及用於通過不同 產生左眼圖像及太Bp 右眼圖像之左圖像產生元件及右 表·單編號A0101 笫4頁/共16頁 1003409408-0 1359284 100年.11月04日梭正_頁 生元件。通過將左、右圖像產生元件產生之左、右眼圖 像投射到螢幕上，當人之左右眼戴上不同偏振方向的眼 鏡，便可看到立體之圖像。 [0005] 但是當光從偏振分束器中射出後，在出射光中含有雜亂 光，該雜亂光之存在，部分原因係所有之實光學元件所 固有之光學特徵所導致之圖像雜訊，如偏振分束器在接 收高水準之光通量時，其一般變成熱負荷並且發生物理 扭曲而引起應力雙折射，這種應力雙折射會導致光的去 偏振及對比度之降低，還有一原因係所述偏振光分別在 各自之左、右圖像產生元件上接收空間訊息外，還會接 收到由所述偏振光光路上之其他光，如偏振光束分離器 等光學元件材料中之雙折射所產生之雜亂空間訊息，.而 這些雜亂光沒有在被投射到顯示器之前有效地將其雜訊 分離並排除，這些圖像雜訊及雜亂空間訊息會降低投影 到螢幕之出射光之對比度。 【發明内容】 [0006] 有鑒於此，有必要提供一種能夠提高對比度之立體投影 光學系統。 [0007] —種立體投影光學系統，其包括依光路設置之： [0008] 一圖像吸收器，用於接收入射光，將該入射光分離成偏 振方向相垂直之一第一偏振光及一第二偏振光，對該第 一偏振光進行調制並載入空間訊息，並出射經調制並載 入有空間訊息之該第一偏振光； [0009] 一檢偏器，其設置於所述圖像吸收器出射之第一偏振光 096136378 表單編號A0101 第5頁/共16頁 1003409408-0 1359284 100年.11.月04日梭正替換百 之出射光路上，用於僅容於該第一偏振光通過； [0010] 一穿透式光調制器，設置於該檢偏器出射之該第一偏振 光之出射光路上，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 ，該第一偏振光保持其偏振方向穿過該穿透式光調制器 ，該穿透式光調制器處於戴止狀態時，該穿透式光調制 器將該第一偏振光之偏振方向轉換成該第二偏振光之偏 振方向並出射。 [0011] 上述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、右眼交替獲得不同偏 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。同時利用光路上設置之檢 偏器，在該檢偏器之作用下，允許特定偏振方向之光通 過而分離並排除了由實光學元件所固有之光學特徵所導 致之圖像雜訊以及由所述偏振光光路中之光學元件材料 中之雙折射所產生之雜亂空間訊息，從而提昇了所投影 之出射光之對比度。 【實施方式】 [0012] 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。 [0013] 請參閱圖1及圖2，為本發明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、一圖像吸收 096136378 表單编號 A0101 第 6 頁/共 16 頁 1003409408-0 -100年11月04日接正_頁 器12、一設置於所述圖像吸收器12之一條出射光路上之 檢偏器13、一設置於所述檢偏器13出射光路上之穿透式 光調制器14以及一投影鏡頭15。 所述光源元件11包括依光路設置之一照明光源1U、一色 輪112以及一積分器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)及藍光（B)之白光 。該光源11可以為鹵素燈、金屬鹵化物燈、氙燈或LED等 。在本實施例中，該光源11為έ素燈。所述色輪112包括 紅、綠、藍三色區’其可在電機（圖未示）的帶動下高速 旋轉，以給投影光路配以各種色彩。所述積分器113用來 均勻化及有效地使用光源11發出之光。 所述圖像吸收器12包括依光路設置之一偏振分束器121及 —反射式空間光調制器122。所述偏振分束器 (Polarization Beam Splitter, PBS) 121 用於將來 自光源元件11之非偏振光變成第一偏振光及第二偏振光 ，在本實施例中所第一偏振光為s偏振光，第二偏振光為 P偏振光。該S偏振光被該偏振分束器121反射，而P偏振 光透過該偏振分束器121 ^該偏振分束器121可以為金屬 撕格型偏振片（Wire Grid P〇iarizer，簡稱WGP偏振片 )，也可以為偏振分光棱鏡，在本實施例中，該偏振分束 器121為偏振分光棱鏡。該偏振分束器丨21根據對s偏振光 和P偏振光之作用不同，可以分為反射5偏振光而透過p偏 振光，與透過S偏振光而反射P偏振光兩種形式。在本實 施例中，所述偏振分束器23反射s偏振光，而可以讓p偏 振光透過。 表單編號A0101 第7頁/共16頁 1003409408-0 1359284 100年11月04日修正替換頁 [0016] 所述反射式空間光調制器122可以為矽基液晶（LiquidOne 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 depth of field image when the left and right eyes are viewed as 'small differences in the surface of the three-dimensional object caused by the human eye spacing'. The images of the left and right eyes are such that the viewer's right eye does not see the left eye @image, and the left eye does not see the 艮 image. The display mode is generally by means of the optical lens worn by the viewer. [0004] 096136378 / stereo projection optical secrets include - a polarizing beam splitter for different angles of incidence f and a left image generating element for generating a left eye image and a too Bp right eye image by different And the right table · single number A0101 笫 4 pages / a total of 16 pages 1003409408-0 1359284 100 years. November 04 shuttle _ page raw components. By projecting the left and right eye images generated by the left and right image generating elements onto the screen, stereoscopic images can be seen when the left and right eyes of the person wear eyeglasses of different polarization directions. [0005] However, when light is emitted from the polarizing beam splitter, the emitted light contains stray light, and the presence of the disordered light is partly due to image noise caused by optical characteristics inherent to all real optical elements. For example, when a polarizing beam splitter receives a high level of luminous flux, it generally becomes a thermal load and undergoes physical distortion to cause stress birefringence, which causes depolarization of light and a decrease in contrast, and another reason is The polarized light receives spatial information on the respective left and right image generating elements, and also receives other light in the optical path of the polarized light, such as birefringence in an optical element material such as a polarizing beam splitter. Disorganized spatial information, and these messy lights do not effectively separate and exclude their noise before being projected onto the display. These image noise and cluttered spatial information reduce the contrast of the projected light projected onto the screen. SUMMARY OF THE INVENTION [0006] In view of the above, it is necessary to provide a stereoscopic projection optical system capable of improving contrast. [0007] A stereoscopic projection optical system comprising an optical path: [0008] an image absorber for receiving incident light, separating the incident light into a first polarization and a polarization direction a second polarized light that modulates the first polarized light and loads the spatial information, and emits the first polarized light modulated and loaded with the spatial information; [0009] an analyzer disposed on the map The first polarized light like the absorber is emitted 096136378 Form No. A0101 Page 5 / Total 16 pages 1003409408-0 1359284 100 years. 11. On the 04th of the month, the shuttle is replacing the exit light path for the first polarization. Light passing through; [0010] a transmissive light modulator disposed on an outgoing light path of the first polarized light emitted by the analyzer, the transmissive light modulator having two alternating working states of opening and closing, When the transmissive light modulator is in an on state, the first polarized light maintains its polarization direction through the transmissive light modulator, and the transmissive light modulator is in a wearing state, the transmissive light modulation Turning the polarization direction of the first polarized light To the direction of polarization of the polarized light and a second exit. [0011] The stereoscopic projection optical system can be used to input signals for the transmissive optical modulator such that the transmissive optical modulator has two alternating working states of opening and closing, so that the left and right eyes of the viewer are alternately obtained. For images with different polarization states, 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, and the stereoscopic image information can be observed. At the same time, an analyzer provided on the optical path is used, and under the action of the analyzer, the light of a specific polarization direction is allowed to pass, and the image noise caused by the optical characteristics inherent in the real optical component is eliminated and eliminated. The disordered spatial information generated by the birefringence in the optical element material in the polarized light path enhances the contrast of the projected outgoing light. [Embodiment] [0012] The following preferred embodiments will be described in detail below with reference to the accompanying drawings. 1 and FIG. 2 are schematic diagrams showing the structure of a stereoscopic projection optical system 100 according to a first embodiment of the present invention. The stereoscopic projection optical system 100 includes one light source element 11 and an image absorption 096136378 arranged in the optical path direction. Form No. A0101 Page 6 / Total 16 Page 1003409408-0 - November 4th, 2014 An analyzer 13 disposed on one of the exiting optical paths of the image absorber 12, a transmissive optical modulator 14 disposed on the optical path of the analyzer 13 and a projection lens 15. The light source element 11 includes an illumination source 1U disposed along the optical path, a color wheel 112, and an integrator 113. The illumination source 111 emits red (R), green (G) and red light (G) required to display a color image. White light of blue light (B). The light source 11 may be a halogen lamp, a metal halide lamp, a xenon lamp or an LED or the like. In this embodiment, the light source 11 is a halogen lamp. The color wheel 112 includes red, green, and blue three-color areas 'which can be rotated at a high speed by a motor (not shown) to match the projection light path with various colors. The integrator 113 is used to homogenize and effectively use the light emitted by the light source 11. The image absorber 12 includes a polarization beam splitter 121 and a reflective spatial light modulator 122 disposed in accordance with the optical path. The polarization beam splitter (PBS) 121 is configured to change the unpolarized light from the light source element 11 into the first polarized light and the second polarized light. In the embodiment, the first polarized light is s-polarized light. The second polarized light is P-polarized light. The S-polarized light is reflected by the polarizing beam splitter 121, and the P-polarized light is transmitted through the polarizing beam splitter 121. The polarizing beam splitter 121 can be a wire Grid P-iarizer (WGP polarizer). It may also be a polarization beam splitting prism. In the present embodiment, the polarization beam splitter 121 is a polarization beam splitting prism. The polarization beam splitter 丨21 can be classified into two types of reflection of 5-polarized light and transmission of p-polarized light, and transmission of S-polarized light by P-polarized light, depending on the action of the s-polarized light and the P-polarized light. In the present embodiment, the polarization beam splitter 23 reflects s-polarized light and transmits p-polarized light. Form No. A0101 Page 7 of 16 1003409408-0 1359284 Revised Replacement Page November 04, 100 [0016] The reflective spatial light modulator 122 may be a liquid crystal based liquid crystal (Liquid)
Crystal on Silicon，LCoS)顯示面板。該矽基液晶 顯示面板工藝結構結合了液晶技術與半導體積體電路技 術。LCoS面板利用半導體制程製作驅動面板，然後在電 晶體上採用研磨技術磨平，並鍍上铭或銀等當作反射鏡 ，形成CMOS基板，再將CMOS基板與含有透明電極的玻璃 基板貼全後灌入液晶分子並封裝測試，形成LC〇s面板。 LCoS面板通過控制光的偏振狀態來調制入射光並給入射 光加入空間訊息，形成包括該入射光及該空間訊息訊息 經過調制之出射光。所述空間訊息可以為該LC〇s所載入 ί 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。在本實施例中，該反射式空間光調制器1 2 2 對S偏振光進行調制並載入空間訊息，並將經調制及載入 有空間訊息之Ρ偏振光反射出去，該ρ偏振光透過偏振分 束器121並發射出去。 4 [0017] 所述檢偏器13可以為一偏光片，其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ρ偏振光通 過’而吸收S偏振光或者讓S偏振光通過，而吸收Ρ偏振光 。在本實施例中，該檢偏器13吸收S偏振光而讓ρ偏振光 通過。 所述穿透式光調制器14可以為液晶顯示裝置（Liquid Crystal Dispaly，LCD)。通過為該穿透式光調制器14 096136378 表單编號A0101 第8頁/共16頁 1003409408-0 [0018] 1359284Crystal on Silicon, LCoS) display panel. The bismuth-based liquid crystal display panel process structure combines liquid crystal technology and semiconductor integrated circuit technology. The LCoS panel uses a semiconductor process to fabricate the driver panel, and then grinds it on the transistor using a grinding technique, and plated it with a mirror or a silver mirror to form a CMOS substrate, and then attaches the CMOS substrate to the glass substrate containing the transparent electrode. Liquid crystal molecules are poured and packaged to form an LC〇s panel. The LCoS panel modulates the incident light by controlling the polarization state of the light and adds a spatial message to the incident light to form an outgoing light that includes the incident light and the spatial information message. The spatial information 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, and the thin film transistor is used to control the deflection state of the liquid crystal molecules, and the liquid crystal The molecules have obvious optical anisotropy and are capable of controlling the light from the incident light, thereby achieving the purpose of loading the image signal into the incident light. In this embodiment, the reflective spatial light modulator 1 2 2 modulates the S-polarized light and loads the spatial information, and reflects the modulated and loaded spatially separated Ρ-polarized light. The polarization beam splitter 121 is emitted and emitted. [0017] The analyzer 13 may be a polarizer that allows light of a certain polarization direction to pass through while absorbing light of other polarization directions. For example, the ρ-polarized light is passed through to absorb S-polarized light or pass S-polarized light to absorb Ρ-polarized light. In the present embodiment, the analyzer 13 absorbs S-polarized light and allows ρ-polarized light to pass. The transmissive light modulator 14 can be a liquid crystal display device (LCD). By the pass-through light modulator 14 096136378 Form number A0101 Page 8 of 16 1003409408-0 [0018] 1359284
1100年.11月〇4日修正 輸入脈衝訊號來控制該穿透式光調制器14之開啟與截止 。如圖3所不’為輪入穿透式光調制器14之輸入訊號以及 相對於左右眼輪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14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的S .偏振光及P偏振光。當為該穿透式光調制器輸入該訊號時 ，該穿透式光調制器14便可交替輪出5偏振光或p偏振光 以k供觀看者左右眼之不同偏振方向之光。可以理解的 是，該輸入訊號之週期係可以調整的。通過穿透式光調 制器14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14的係Ρ偏振光， 下以Ρ偏振光為例，來說明該穿透式光調制器14的作用原 理。當然，可以想到的是，對S偏振光之作用係與ρ偏振 光相同。 [0019]1100. November 〇 4th correction Input pulse signal to control the opening and closing of the transmissive light modulator 14. 3 is a waveform diagram of the input signal of the wheel-passing light modulator 14 and the polarization state of the light emitted from the left and right eye wheels. In the present embodiment, the transmissive optical modulator 14 is turned on or off in accordance with the input signal waveform diagram shown in Fig. 3, thereby alternately providing S, polarized light and P-polarized light of different polarization directions for the left and right eyes. When the signal is input to the transmissive light modulator, the transmissive light modulator 14 alternately rotates 5 polarized light or p-polarized light to provide light for different polarization directions of the viewer's left and right eyes. 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 turn-on and turn-off of the transmissive light modulator 14. In the present embodiment, the system-polarized light of the transmissive light modulator 14 is input, and the Ρ-polarized light is taken as an example. The principle of operation of the transmissive light modulator 14 will be described. Of course, it is conceivable that the effect on S-polarized light is the same as that of ρ-polarized light. [0019]
[0020] 在該穿透式光調制器14開啟時，如圖i所示，該ρ偏振光 直接穿過該穿透式光調㈣會對該ρ偏振光之偏振 狀態進行調制。但是，在穿透式光調制器14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提 供左右眼之不同偏振方向之光。 所述投影鏡頭15設置於穿透式光調制器14之出射光之光 路上，用於將出射光所形成之圖像放大，並將放大之圖 像投影到螢幕（圖未示）上。 [0021] 圖4為本發明提供之第二實施例之立體投影光學系統200 096136378 之結構不意圖 表單編號A0101 。該立體投影光學系統2〇〇包括沿光路方向 第9頁/共16頁 1003409408-0 1359284 — 100年11月04日核正替換百 依次設置之一光源元件21、一圖像吸收器22，一設置於 所述圖像吸收器22之一條出射光路上之檢偏器23、一設 置於所述檢偏器23出射光路上之穿透式光調制器24以及 一投影鏡頭25。 [0022] 該第二實施例與第一實施例之不同在於所述圖像吸收器 22之組成結構不同，第二實施例之圖像吸收器22包括一 偏振分束器221及一穿透式空間光調制器222。該穿透式 空間光調制器222可以為液晶顯示裝置（1^911丨(1(^75- tal Dispaly，LCD)。所述穿透式空間光調制器222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 空間訊息，形成包括該空間訊息之經過調制之出射光。 所述空間訊息可以為所述穿透式空間光調制器222所載入 的控制訊號電壓，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。在本實施例中，該所述穿透式空間光調制 _ 器222對入射之S偏振光進行調制，並在所述S偏振光上疊 加空間訊息，以產生一包括空間訊息之出射光，即包括 有空間訊息之P偏振光。該P偏振光穿過該穿透式空間光 調制器222後發射出去。 [0023] 因所述檢偏器23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S偏振 光或者讓S偏振光通過，而吸收P偏振光。所以當該檢偏 器23讓P偏振光通過，而吸收S偏振光時，該檢偏器23設 096136378 表單编號A0101 第10頁/共16頁 1003409408-0 1100年.11 月 置在穿透式空間光調制器222之S偏振光之出射光路上。 當该檢偏器23讓S偏振光通過，而吸收p偏振光_，該檢 偏器23設置在穿透式空間光調制器222之p偏振光之出射 光路上。在本實施例中，該檢偏器13設置在穿透式空間 光調制器222之S偏振光之出射光路上。而該p偏振光或§ 偏振光在其他光學元件如穿透式光調制器24中之傳輸光 路相同。 [〇〇24]上述立體投影光學系統使用時可通過為穿透式光調制器 • 輪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、右眼交替獲得不同偏 振狀態之影像，當該輸入訊波之頻率足夠快時，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。同時利用光路上設置之檢 偏器’在該檢偏器之㈣下，允許特定偏振方向之光通 過而分離並排除了由實光學元件㈣有之光學特徵所導 致之圖像雜訊以及由所述偏振光光路中之光學元件材料 •中之雙折射所產生之雜亂空間訊息，從而提昇了所投影 之出射光之對比度。 [0025]综上所述，本發明符合發明專利要件，爰依法提出專利 申請n上所述者僅為本發k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㈣或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單説明】 [0026] 096136378 圖1係本發明第-實施例之立體投影光學系統在所述穿透 1003409408-0 表單編號Α0Η» 第丨1頁/共16頁 1359284 100年.11月04日按正替换頁 [0027] [0028] [0029] [0030] [0031] [0032] [0033] [0034] [0035] [0036] [0037] [0038] [0039] [0040] 式光調制器開啟時之結構示意圖。 圖2係本發明第一實施例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。 圖3係圖1的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。 圖4係本發明提供之第二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】 立體投影光學系統：100、200 光源組件：11、21 照明光源：111 色輪：112 積分器：113 圖像吸收器：12、22 偏振分束器：121、221 檢偏器：13、23 穿透式光調制器：14、24 投影鏡頭：15、25 反射式空間光調制器：122、222[0020] When the transmissive light modulator 14 is turned on, as shown in FIG. 1, the ρ-polarized light directly passes through the transmissive light modulation (4) to modulate the polarization state of the ρ-polarized light. However, when the transmissive optical modulator 14 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, so that it can be alternately The viewer provides light of different polarization directions for the left and right eyes. The projection lens 15 is disposed on the optical path of the outgoing light of the transmissive light modulator 14 for amplifying the image formed by the outgoing light and projecting the enlarged image onto a screen (not shown). 4 is a structure of a stereoscopic projection optical system 200 096136378 according to a second embodiment of the present invention, which is not intended to be in the form No. A0101. The stereoscopic projection optical system 2 includes one light source element 21 and one image absorber 22 in the order of the optical path direction 9th page/16 pages 1003409408-0 1359284-November 04, 100. An analyzer 23 disposed on one of the exiting optical paths of the image absorber 22, a transmissive optical modulator 24 disposed on the optical path of the analyzer 23, and a projection lens 25. [0022] The second embodiment is different from the first embodiment in that the image absorber 22 is different in composition, and the image absorber 22 of the second embodiment includes a polarization beam splitter 221 and a transmissive type. Spatial light modulator 222. The transmissive spatial light modulator 222 can be a liquid crystal display device (1^911- Dis Disply (LCD). The transmissive spatial light modulator 222 passes through the polarization state of the input light. Modulating incident light and adding spatial information to the incident light to form modulated modulated light including the spatial information. The spatial information may be a control signal voltage loaded by the transmissive spatial light modulator 222, the control The signal voltage directly controls the switching state of the thin film transistor, and the thin film transistor is used to control 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 realizing The incident light is loaded for the purpose of the image signal. In the embodiment, the transmissive spatial light modulator 222 modulates the incident S-polarized light and superimposes the spatial information on the S-polarized light to An outgoing light comprising a spatial message is generated, that is, P-polarized light including a spatial information. The P-polarized light is transmitted through the transmissive spatial light modulator 222. [0023] The device 23 can pass light of a certain polarization direction and absorb light of other polarization directions, for example, let P-polarized light pass, absorb S-polarized light or pass S-polarized light, and absorb P-polarized light. Therefore, when the analyzer is used 23, when P-polarized light is passed, and when S-polarized light is absorbed, the analyzer 23 is set to 096136378. Form No. A0101 Page 10/16 pages 1003409408-0 1100. November placed in the transmissive spatial light modulator 222 The S-polarized light exits the optical path. When the analyzer 23 passes the S-polarized light and absorbs the p-polarized light, the analyzer 23 is disposed at the p-polarized light of the transmissive spatial light modulator 222. In the present embodiment, the analyzer 13 is disposed on the outgoing light path of the S-polarized light of the transmissive spatial light modulator 222. The p-polarized light or the § polarized light is in other optical components such as transmissive light. The transmission optical path in the modulator 24 is the same. [〇〇24] The stereoscopic projection optical system described above can be used by a transmissive optical modulator to enable the transmissive optical modulator to have two transitions of on and off. Working status, making the left and right eyes of the viewer Obtain images of different polarization states. When the frequency of the input signal is fast enough, the left and right eyes of the viewer respectively wear two polarizing plates whose polarization directions are perpendicular to each other, and the stereoscopic image information can be observed. An analyzer disposed on the road, under (4) of the analyzer, allows light of a specific polarization direction to pass and separate and exclude image noise caused by optical characteristics of the real optical component (4) and by the polarized light The interfering spatial information generated by the birefringence in the optical path material in the optical path enhances the contrast of the projected outgoing light. [0025] In summary, the present invention meets the requirements of the invention patent, and patent application is filed according to law. 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 equivalents (four) 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 [0026] 096136378 FIG. 1 is a perspective projection optical system according to a first embodiment of the present invention in the penetration 1003409408-0 Form No. Η0Η» Page 1 of 16 Page 13529284 100. November [0028] [0030] [0040] [0040] [0040] [0040] [0040] [0040] [0040] Schematic diagram of the structure when the modulator is turned on. Fig. 2 is a schematic view showing the structure of the stereoscopic projection optical system of the first embodiment of the present invention when the transmissive optical modulator is turned off. Fig. 3 is a waveform diagram showing the input signals of the transmissive optical modulator of Fig. 1 and the polarization states of the light outputted from the left and right eyes. Fig. 4 is a view showing the configuration of a stereoscopic projection optical system according to a second embodiment of the present invention. [Main component symbol description] Stereoscopic projection optical system: 100, 200 Light source components: 11, 21 Illumination light source: 111 Color wheel: 112 Integrator: 113 Image absorber: 12, 22 Polarization beam splitter: 121, 221 Transmitter: 13, 23 Transmissive Light Modulator: 14, 24 Projection Lens: 15, 25 Reflective Spatial Light Modulator: 122, 222
096136378 表單编號A0101 第12頁/共16頁 1003409408-0096136378 Form No. A0101 Page 12 of 16 1003409408-0