TWI383177B - Optical system - Google Patents
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- TWI383177B TWI383177B TW097133105A TW97133105A TWI383177B TW I383177 B TWI383177 B TW I383177B TW 097133105 A TW097133105 A TW 097133105A TW 97133105 A TW97133105 A TW 97133105A TW I383177 B TWI383177 B TW I383177B
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- 230000004323 axial length Effects 0.000 description 11
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Description
本發明涉及一種光學系統，尤其涉及一種應用於投影機之光學系統。 The present invention relates to an optical system, and more particularly to an optical system applied to a projector.
如圖1所示，目前LED投影機之光學系統100包括沿光路依次設置之三個LED光源110，三個聚光透鏡組120，兩個單分光鏡130，一勻光鏡140，一中繼透鏡組150，一反射鏡160，一TIR棱鏡系統170，一數位微鏡裝置180及一鏡頭190。由於採用之係兩個單分光鏡130。所述兩個單分光鏡130平行設置，且均與水平面成一定角度傾斜。所述中繼透鏡組150包括相互垂直設置之第一中繼透鏡151及第二中繼透鏡152。其中一個LED光源110，兩個單分光鏡130，勻光鏡140，第一中繼透鏡151及反射鏡160沿X軸方向根據光路依次排開。另外兩個LED光源110沿Y軸方向平行設置，且分別位於所述兩個單分光鏡130之同一側。這樣就對LED投影機之鏡頭190之軸向長度產生了很大制約，即只能採用軸向長度較長之鏡頭。但軸向長度較長之鏡頭價格比較貴，因此會增加投影機之成本。而軸向長度較短之鏡頭價格就相對比較便宜。因此在不影響光效率之前提下，如何進行新之光學系統之設計來改變LED光源之擺放位置，縮短鏡頭之軸向長度，使軸向長度短之鏡頭也可以應用於投影機中變成了很重要之問題。 As shown in FIG. 1 , the optical system 100 of the current LED projector includes three LED light sources 110 arranged in sequence along the optical path, three concentrating lens groups 120, two single beam splitting mirrors 130, a uniform light mirror 140, and a relay. A lens group 150, a mirror 160, a TIR prism system 170, a digital micromirror device 180 and a lens 190. Since the two single beamsplitters 130 are used. The two single beam splitters 130 are arranged in parallel and are inclined at an angle to the horizontal plane. The relay lens group 150 includes a first relay lens 151 and a second relay lens 152 that are perpendicular to each other. One of the LED light sources 110, the two single beam splitters 130, the homogenizing mirror 140, the first relay lens 151 and the mirror 160 are sequentially arranged in the X-axis direction according to the optical path. The other two LED light sources 110 are disposed in parallel along the Y-axis direction and are respectively located on the same side of the two single beam splitters 130. This imposes a large constraint on the axial length of the lens 190 of the LED projector, that is, only a lens having a long axial length can be used. However, lenses with longer axial lengths are more expensive, which increases the cost of the projector. The lens with a shorter axial length is relatively cheaper. Therefore, before the light efficiency is affected, how to design a new optical system to change the position of the LED light source and shorten the axial length of the lens, so that the lens with a short axial length can also be applied to the projector. Very important issue.
有鑒於此，有必要提供一種可縮短鏡頭軸向長度之光學系統。 In view of this, it is necessary to provide an optical system that can shorten the axial length of the lens.
一種光學系統，其包括第一光源，第二光源，第三光源，與所述第一、第二、第三光源分別對應的三個聚光透鏡組，一雙分光鏡，一勻光鏡，一中繼透鏡組，一TIR棱鏡系統，一數位微鏡裝置及一鏡頭。所述雙分光鏡由第一單分光鏡及第二單分光鏡交叉組合而成，用於將經過聚光透鏡組之光束進行反射或透射。所述第一、第二、第三光源發出之光束分別經過與其對應之聚光透鏡組，被雙分光鏡透射或反射後，在勻光鏡上匯聚成平行光束，然後光束依次經過所述中繼透鏡組，TIR棱鏡系統，數位微鏡裝置，接著被數位微鏡裝置再次反射入TIR棱鏡系統中，最後進入鏡頭。所述雙分光鏡包括相對的第一側及第二側，及與所述第一側相鄰的第三側。所述第一光源及所述第二光源分別設置在所述雙分光鏡的所述第一側及所述第二側。所述光學系統還包括一個第三單分光鏡。所述第三單分光鏡傾斜設置在所述雙分光鏡的第三側。所述第三光源及所述勻光鏡分別位於所述第三單分光鏡的相對兩側。所述第三單分光鏡鄰近所述第三光源的一端朝向所述雙分光鏡靠近。所述第一單分光鏡透射所述第二光源發出的光束，且將所述第一光源發出的光束反射至所述第三單分光鏡。所述第二單分光鏡透射所述第一光源發出的光束，且將所述第二光源發出的光束反射至所述第三單分光鏡。所述第三單分光鏡將所述第三光源發出的光束透射至所述勻光鏡，且將經過所述雙 分光鏡的所述第一光源發出的光束及所述第二光源發出的光束發射至所述勻光鏡。 An optical system comprising a first light source, a second light source, a third light source, three concentrating lens groups corresponding to the first, second, and third light sources, a double beam splitter, and a uniform light mirror, A relay lens group, a TIR prism system, a digital micromirror device and a lens. The double beam splitter is formed by cross-combining a first single beam splitter and a second single beam splitter for reflecting or transmitting a light beam passing through the collecting lens group. The light beams emitted by the first, second, and third light sources respectively pass through the condensing lens group corresponding thereto, are transmitted or reflected by the double beam splitter, and then converge on the condensing mirror into parallel beams, and then the light beams sequentially pass through the middle Following the lens group, the TIR prism system, the digital micromirror device, and then the digital micromirror device is again reflected into the TIR prism system and finally into the lens. The dual beam splitter includes opposing first and second sides, and a third side adjacent to the first side. The first light source and the second light source are respectively disposed on the first side and the second side of the double beam splitter. The optical system also includes a third single beam splitter. The third single beam splitter is obliquely disposed on a third side of the double beam splitter. The third light source and the light condensing mirror are respectively located on opposite sides of the third single beam splitter. One end of the third single beam splitter adjacent to the third light source approaches the double beam splitter. The first single beam splitter transmits a light beam emitted by the second light source, and reflects a light beam emitted by the first light source to the third single beam splitter. The second single beam splitter transmits the light beam emitted by the first light source, and reflects the light beam emitted by the second light source to the third single beam splitter. The third single beam splitter transmits a light beam emitted by the third light source to the light homogenizing mirror, and will pass the double The light beam emitted by the first light source of the beam splitter and the light beam emitted by the second light source are emitted to the light homogenizing mirror.
相較於先前技術，本發明之光學系統利用雙分光鏡使光路發生彎折，可將光源之位置調整，使沿鏡頭之光軸方向排列之光學元件減少，因此可縮短鏡頭之軸向長度。 Compared with the prior art, the optical system of the present invention bends the optical path by using a double beam splitter, and the position of the light source can be adjusted to reduce the optical elements arranged along the optical axis of the lens, thereby shortening the axial length of the lens.
請參閱圖2，為本發明第一實施方式提供之光學系統200之示意圖。所述光學系統200包括沿光路依次設置之第一光源211，第二光源212，第三光源213，三個聚光透鏡組220，一雙分光鏡(Diachronic mirror)230，一勻光鏡240，一中繼透鏡組250，一TIR棱鏡系統260，一數位微鏡裝置270，及一鏡頭280。 Please refer to FIG. 2 , which is a schematic diagram of an optical system 200 according to a first embodiment of the present invention. The optical system 200 includes a first light source 211, a second light source 212, a third light source 213, three concentrating lens groups 220, a dual zoning mirror 230, and a uniform lens 240. A relay lens group 250, a TIR prism system 260, a digital micromirror device 270, and a lens 280.
所述第一光源211發出紅光，所述第二光源212發出綠光，所述第三光源213發出藍光。在本實施方式中，所述第一光源211，第二光源212及第三光源213均為LED光源。 The first light source 211 emits red light, the second light source 212 emits green light, and the third light source 213 emits blue light. In the embodiment, the first light source 211, the second light source 212, and the third light source 213 are all LED light sources.
所述三個聚光透鏡組220分別設置於所述第一光源211，第二光源212，第三光源213之出射光路上，分別用於匯聚所述第一光源211，第二光源212，第三光源213所發出之光束，並使光束變成平行光束。 The three concentrating lens groups 220 are respectively disposed on the outgoing light paths of the first light source 211, the second light source 212, and the third light source 213, respectively for concentrating the first light source 211 and the second light source 212, The light beam emitted by the three light sources 213 causes the light beam to become a parallel light beam.
所述雙分光鏡230用於對經過聚光透鏡組220之光束進行有選擇之反射及透射。所述雙分光鏡230係由第一單分光鏡231及第二單分光鏡232交叉組合而成。在本實施方式中，所述第一單分光鏡231為紅色分光鏡，所述第二單分光鏡232為綠色分光鏡。可以理解，所述雙分光鏡230具 有分光之特性，且其分光特性係由其表面所鍍之膜層來決定之，可根據不同需要來選擇合適之膜層，從而可實現雙分光鏡230對光之反射及透射。本實施方式中，所採用之第一單分光鏡231可反射紅光，而讓綠光及藍光穿透。第二單分光鏡232可反射綠光，而讓紅光及藍光穿透。所述雙分光鏡230具有沿X軸方向相對之第一側201及第二側202，沿Y軸方向相對之第三側203及第四側204。所述第一光源211及第二光源212分別位於所述雙分光鏡230之第一側201及第二側202，所述第三光源213位於所述雙分光鏡230之第三側203。因此，所述第一光源211發出之紅光一部分透射過第二單分光鏡232，在第一單分光鏡231表面反射到勻光鏡240中，另一部分紅光直接在第一單分光鏡231表面反射進入勻光鏡240中；第二光源212發出之綠光一部分透射過第一單分光鏡231，在第二單分光鏡232表面反射到勻光鏡240中，一部分綠光直接在第二單分光鏡232表面反射進入勻光鏡240中；所述第三光源213所發出之藍光可直接穿透所述雙分光鏡230進入勻光鏡240中。 The double beam splitter 230 is used for selectively reflecting and transmitting the light beam passing through the collecting lens group 220. The double beam splitter 230 is formed by a combination of a first single beam splitter 231 and a second single beam splitter 232. In the embodiment, the first single beam splitter 231 is a red beam splitter, and the second single beam splitter 232 is a green beam splitter. It can be understood that the double beam splitter 230 has It has the characteristics of splitting, and its spectral characteristics are determined by the film layer coated on its surface. The appropriate film layer can be selected according to different needs, so that the double spectroscope 230 can reflect and transmit light. In the present embodiment, the first single beam splitter 231 used can reflect red light and allow green light and blue light to penetrate. The second single beam splitter 232 can reflect green light while allowing red and blue light to penetrate. The double beam splitter 230 has a first side 201 and a second side 202 opposite to each other in the X-axis direction, and a third side 203 and a fourth side 204 opposite to each other in the Y-axis direction. The first light source 211 and the second light source 212 are respectively located on the first side 201 and the second side 202 of the double beam splitter 230 , and the third light source 213 is located on the third side 203 of the double beam splitter 230 . Therefore, a part of the red light emitted by the first light source 211 is transmitted through the second single beam splitter 232, and is reflected on the surface of the first single beam splitter 231 into the uniform lens 240, and another part of the red light is directly in the first single beam splitter 231. The surface is reflected into the homogenizing mirror 240; a part of the green light emitted by the second light source 212 is transmitted through the first single beam splitter 231, and is reflected on the surface of the second single beam splitter 232 to the uniform lens 240, and a part of the green light is directly in the second The surface of the single beam splitter 232 is reflected into the uniform lens 240; the blue light emitted by the third light source 213 can directly penetrate the double beam splitter 230 into the uniform lens 240.
所述勻光鏡240用於將經過雙分光鏡230透射或反射之光束均勻化，在勻光鏡240之出光面241形成一個以一定頻率變換色彩之具有均勻光亮度之矩形區域，該出光面241係一個均勻之平面光源。所述勻光鏡240位於所述雙分光鏡230之第四側204。且所述勻光鏡240位於所述雙分光鏡230之出射光路上。 The light absorbing mirror 240 is used to homogenize the light beam transmitted or reflected by the double beam splitter 230, and a light emitting surface 241 of the light condensing mirror 240 forms a rectangular region having a uniform light intensity at a certain frequency, and the light emitting surface The 241 is a uniform planar light source. The light absorbing mirror 240 is located on the fourth side 204 of the double beam splitter 230. The light absorbing mirror 240 is located on the outgoing light path of the double beam splitter 230.
所述中繼透鏡組250包括第一中繼透鏡251及第二中繼透 鏡252，且所述第二中繼透鏡252平行設置在所述第一中繼透鏡251之出射光路上。所述中繼透鏡組250用於接收並匯聚從所述勻光鏡240射出之光束。可以理解，第一光源211，第二光源212及第三光源213發出之光束在傳遞過程中，肯定會有少量之光束會發散，所述中繼透鏡組250可將光束進行匯聚，使光束變成平行光束發射出去。 The relay lens group 250 includes a first relay lens 251 and a second relay The mirror 252 is disposed, and the second relay lens 252 is disposed in parallel on the outgoing light path of the first relay lens 251. The relay lens group 250 is configured to receive and concentrate a light beam emitted from the light homogenizing mirror 240. It can be understood that, during the transmission of the light beams emitted by the first light source 211, the second light source 212, and the third light source 213, a certain amount of light beams will be diverged, and the relay lens group 250 can concentrate the light beams to make the light beams become Parallel beams are emitted.
所述TIR棱鏡系統260由兩塊棱鏡組成。所述TIR棱鏡系統260可使進入其內部之光束不斷之發生反射及折射，從而改變光束之方向。當從中繼透鏡組250射出之光束進入所述TIR棱鏡系統260之後，光束之方向就被改變成數位微鏡裝置270工作所需之方向和角度。且當從數位微鏡裝置270中射出之光束再次進入所述TIR棱鏡系統260之後，光束之方向就被改變，使光束可進入所述鏡頭280中。 The TIR prism system 260 is comprised of two prisms. The TIR prism system 260 allows the beam entering its interior to be constantly reflected and refracted, thereby changing the direction of the beam. When the light beam emerging from the relay lens group 250 enters the TIR prism system 260, the direction of the light beam is changed to the direction and angle required for the digital micromirror device 270 to operate. And when the beam emerging from the digital micromirror device 270 re-enters the TIR prism system 260, the direction of the beam is changed so that the beam can enter the lens 280.
所述數位微鏡裝置270為一微鏡反射陣列，這些微鏡受圖像信號之控制，各微鏡獨立翻轉，分別處於開或關狀態，形成一個圖像源，其中開狀態之微鏡將從TIR棱鏡系統260射出之光束反射回TIR棱鏡系統260，並經過所述TIR棱鏡系統260被反射入鏡頭280。 The digital micromirror device 270 is a micromirror reflection array, and the micromirrors are controlled by image signals, and the micromirrors are independently flipped, respectively, in an on or off state to form an image source, wherein the micromirrors in the open state will be The beam emerging from the TIR prism system 260 is reflected back to the TIR prism system 260 and reflected through the TIR prism system 260 into the lens 280.
所述鏡頭280位元於先經過數位微鏡裝置270再經過TIR棱鏡系統260之光束之出射光路中，用於接收從TIR棱鏡系統260中射出之光線，然後在螢幕(未圖示)上成像。所述鏡頭280包括一進光面281。 The lens 280 bits are first passed through the digital micromirror device 270 and then through the exit beam path of the beam of the TIR prism system 260 for receiving light emitted from the TIR prism system 260 and then on a screen (not shown). Imaging. The lens 280 includes a light incident surface 281.
光束之傳遞過程如下所述：所述第一光源211，第二光源212及第三光源213發出之光束，分別經過聚光透鏡組 220變成平行光束，然後通過所述雙分光鏡230進入勻光鏡240，從勻光鏡240射出之光束經過中繼透鏡組250匯聚，進入TIR棱鏡系統260，然後進入數位微鏡裝置270中，接著又被數位微鏡裝置270中之處於開狀態之微鏡反射回TIR棱鏡系統260，最後光束進入鏡頭280中，將圖像投影在螢幕(未圖示)上。 The process of transmitting the light beam is as follows: the light beams emitted by the first light source 211, the second light source 212, and the third light source 213 are respectively passed through the collecting lens group 220 becomes a parallel beam, and then enters the homogenizing mirror 240 through the double beam splitter 230. The beam emitted from the homogenizing mirror 240 is concentrated by the relay lens group 250, enters the TIR prism system 260, and then enters the digital micromirror device 270. The micromirrors in the open state of the digital micromirror device 270 are then reflected back to the TIR prism system 260, and finally the light beam enters the lens 280, projecting the image onto a screen (not shown).
可以理解，在本實施方式中，所述第三光源213，與第三光源213對應之聚光透鏡組220，雙分光鏡230，勻光鏡240，中繼透鏡組250，TIR棱鏡系統260及數位微鏡裝置270依光路沿Y軸方向呈直線排列在所述鏡頭280之進光面281一側。第一光源211及第二光源212位於所述雙分光鏡230之沿X軸方向之相對之第一側201及第二側202，因此所述光學系統200之沿X軸方向排列之光學元件只有第一光源211、與第一光源211對應之聚光透鏡組220、雙分光鏡230、與第二光源212對應之聚光透鏡組220及第二光源212，所以可縮短鏡頭280之軸向長度。 It can be understood that, in this embodiment, the third light source 213, the concentrating lens group 220 corresponding to the third light source 213, the double beam splitter 230, the uniform lens 240, the relay lens group 250, the TIR prism system 260 and The digital micromirror device 270 is linearly arranged on the side of the light incident surface 281 of the lens 280 in the Y-axis direction in accordance with the optical path. The first light source 211 and the second light source 212 are located on the first side 201 and the second side 202 of the double beam splitter 230 in the X-axis direction, so that the optical elements of the optical system 200 arranged along the X-axis direction are only The first light source 211, the condensing lens group 220 corresponding to the first light source 211, the double beam splitter 230, the condensing lens group 220 corresponding to the second light source 212, and the second light source 212, so that the axial length of the lens 280 can be shortened. .
請參閱圖3，為本發明第二實施方式提供之光學系統300之示意圖，所述光學系統300與第一實施方式之光學系統200之主要區別在於，增加了一個第三單分光鏡390，且第一光源311、第二光源312及第三光源313之位置發生了變化。所述第三單分光鏡390為藍色分光鏡，且所述第三單分光鏡390可讓藍光透過，反射紅光及綠光。所述第一光源311及第二光源312沿Y軸方向排列在所述雙分光鏡330之相對之第一側301及第二側302。所述第三光源313與所述第二光源312沿Y軸方向平行設置。所述勻光鏡340 之進光面341與所述第三光源313之發光面314平行設置。所述第三單分光鏡390位於所述第三光源313與所述勻光鏡340之間，且沿X軸方向排列在所述雙分光鏡330之第三側303。所述第三單分光鏡390靠近所述第三光源313之一端朝雙分光鏡330靠近。所述第一中繼透鏡351，第二中繼透鏡352，TIR棱鏡系統360及數位微鏡裝置370沿Y軸依次排列在所述勻光鏡340之出射光路上。 3 is a schematic diagram of an optical system 300 according to a second embodiment of the present invention. The main difference between the optical system 300 and the optical system 200 of the first embodiment is that a third single beam splitter 390 is added, and The positions of the first light source 311, the second light source 312, and the third light source 313 are changed. The third single beam splitter 390 is a blue beam splitter, and the third single beam splitter 390 can transmit blue light and reflect red light and green light. The first light source 311 and the second light source 312 are arranged on the opposite first side 301 and second side 302 of the double beam splitter 330 along the Y-axis direction. The third light source 313 and the second light source 312 are disposed in parallel along the Y-axis direction. The uniform lens 340 The light incident surface 341 is disposed in parallel with the light emitting surface 314 of the third light source 313. The third single beam splitter 390 is located between the third light source 313 and the light homogenizing mirror 340 and is arranged on the third side 303 of the double beam splitter 330 along the X-axis direction. The third single beam splitter 390 approaches one end of the third light source 313 toward the double beam splitter 330. The first relay lens 351, the second relay lens 352, the TIR prism system 360, and the digital micromirror device 370 are sequentially arranged along the Y axis on the outgoing light path of the uniform lens 340.
本實施方式中光束之傳遞過程與第一實施方式不同之地方在於，光束在進入勻光鏡340之前，其在雙分光鏡330及第三單分光鏡390中之光路不同，第一光源311及第二光源312發出之光束經過雙分光鏡330之後，被透射或反射到第三單分光鏡390上，然後進入勻光鏡340中；第三光源313發出之光束直接穿過第三單分光鏡390進入勻光鏡340中。 The difference in the transmission process of the light beam in the present embodiment is different from that in the first embodiment in that the light path in the double beam splitter 330 and the third single beam splitter 390 is different before the light beam enters the uniform lens 340, and the first light source 311 and The light beam emitted by the second light source 312 passes through the double beam splitter 330, is transmitted or reflected onto the third single beam splitter 390, and then enters the light homogenizing mirror 340; the light beam emitted by the third light source 313 passes directly through the third single beam splitter 390 enters the homogenizing mirror 340.
可以理解，本實施方式中，所述光學系統300沿X軸方向排列之光學元件只有雙分光鏡330及第三單分光鏡390，可縮短鏡頭380之軸向長度。 It can be understood that in the present embodiment, the optical elements arranged in the X-axis direction of the optical system 300 have only the double beam splitter 330 and the third single beam splitter 390, and the axial length of the lens 380 can be shortened.
請參閱圖4，為本發明第三實施方式提供之光學系統400之示意圖，本實施方式之光學系統400與第二實施方式之光學系統300之主要區別在於，又增加了一個反射鏡500，且第一光源411、第二光源412及第三光源413之位置發生了變化。所述第一光源411及第二光源412沿X軸方向排列在所述雙分光鏡430之相對之第一側401及第二側402，所述第三光源413與第一光源411沿X軸方向平行設置。所述第一中繼透鏡451與第二中繼透鏡452垂直放置 。所述第一中繼透鏡451位於勻光鏡440與反射鏡500之間，所述第二中繼透鏡452位於反射鏡500與TIR棱鏡系統460之間。且所述反射鏡500之一端靠近第一中繼透鏡451，另一端靠近第二中繼透鏡452。所述第二中繼透鏡452，TIR棱鏡系統460，數位微鏡裝置470沿Y軸方向依次排列在所述反射鏡500之出射光路中。 4 is a schematic diagram of an optical system 400 according to a third embodiment of the present invention. The main difference between the optical system 400 of the present embodiment and the optical system 300 of the second embodiment is that a mirror 500 is added, and The positions of the first light source 411, the second light source 412, and the third light source 413 are changed. The first light source 411 and the second light source 412 are arranged on the opposite first side 401 and the second side 402 of the double beam splitter 430 along the X-axis direction, and the third light source 413 and the first light source 411 are along the X-axis. The directions are set in parallel. The first relay lens 451 is placed perpendicular to the second relay lens 452 . The first relay lens 451 is located between the uniform lens 440 and the mirror 500, and the second relay lens 452 is located between the mirror 500 and the TIR prism system 460. And one end of the mirror 500 is close to the first relay lens 451, and the other end is close to the second relay lens 452. The second relay lens 452, the TIR prism system 460, and the digital micromirror device 470 are sequentially arranged in the exit optical path of the mirror 500 along the Y-axis direction.
本實施方式之光學系統400之光束傳遞過程與第二實施方式之光束傳遞過程不同之地方在於，從勻光鏡440射出之光束，先經過第一中繼透鏡451到達所述反射鏡500上，並在反射鏡500之表面發生反射，使光路發生彎折，然後才進入第二中繼透鏡452中。 The beam transfer process of the optical system 400 of the present embodiment is different from the beam transfer process of the second embodiment in that the light beam emitted from the uniform lens 440 first passes through the first relay lens 451 to reach the mirror 500. Reflection occurs on the surface of the mirror 500 to bend the optical path before entering the second relay lens 452.
可以理解，本實施方式中，所述光學系統400之沿X軸方向排列之光學元件排列成兩層，其中沿X軸方向排列光學元件最多之一層包括第三光源413，與第三光源413對應之聚光透鏡組420，單分光鏡490，勻光鏡440，第一中繼透鏡451及反射鏡500，比現有技術中之沿X軸方向排列之光學元件少，因此可適當縮短鏡頭之軸向長度。 It can be understood that, in this embodiment, the optical elements arranged in the X-axis direction of the optical system 400 are arranged in two layers, wherein at most one of the optical elements arranged in the X-axis direction includes a third light source 413 corresponding to the third light source 413. The concentrating lens group 420, the single beam splitter 490, the shimming mirror 440, the first relay lens 451 and the mirror 500 are smaller than the optical elements arranged in the X-axis direction in the prior art, so that the lens axis can be appropriately shortened. To the length.
本發明之光學系統利用雙分光鏡使光路發生彎折，可將光源之位置調整，從而使沿鏡頭之光軸方向排列之光學元件減少，可縮短鏡頭之軸向長度。 The optical system of the present invention bends the optical path by using a double beam splitter, and can adjust the position of the light source, thereby reducing the number of optical elements arranged along the optical axis direction of the lens, and shortening the axial length of the lens.
綜上所述，本發明符合發明專利要件，爰依法提出專利申請。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內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description 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 are It should be covered by the following patent application.
100、200、300、400‧‧‧光學系統 100, 200, 300, 400‧‧‧ optical systems
110‧‧‧LED光源 110‧‧‧LED light source
120、220、320、420‧‧‧聚光透鏡組 120, 220, 320, 420‧ ‧ concentrating lens group
130‧‧‧單分光鏡 130‧‧‧Single beam splitter
140、240、340、440‧‧‧勻光鏡 140, 240, 340, 440‧‧ ‧ uniform mirror
150、250、350、450‧‧‧中繼透鏡組 150, 250, 350, 450‧‧‧ relay lens group
151、251、351、451‧‧‧第一中繼透鏡 151, 251, 351, 451‧‧‧ first relay lens
152、252、352、452‧‧‧第二中繼透鏡 152, 252, 352, 452‧‧‧second relay lens
160、500‧‧‧反射鏡 160, 500‧‧‧ mirror
170、260、360、460‧‧‧TIR棱鏡系統 170, 260, 360, 460‧‧‧TIR prism system
180、270、370、470‧‧‧數位微鏡裝置 180, 270, 370, 470‧‧‧ digital micromirror devices
190、280、380、480‧‧‧鏡頭 190, 280, 380, 480‧‧ lens
201、301、401‧‧‧第一側 201, 301, 401‧‧‧ first side
202、302、402‧‧‧第二側 202, 302, 402‧‧‧ second side
203、303‧‧‧第三側 203, 303‧‧‧ third side
204‧‧‧第四側 204‧‧‧ fourth side
211、311、411‧‧‧第一光源 211, 311, 411‧‧‧ first light source
212、312、412‧‧‧第二光源 212, 312, 412‧‧‧ second light source
213、313、413‧‧‧第三光源 213, 313, 413‧‧‧ third light source
230、330、430‧‧‧雙分光鏡 230, 330, 430‧‧‧Double beamsplitter
231‧‧‧第一單分光鏡 231‧‧‧First single beam splitter
232‧‧‧第二單分光鏡 232‧‧‧Second single beam splitter
241、341‧‧‧出光面 241, 341‧‧‧ shiny surface
281‧‧‧進光面 281‧‧‧Into the glossy surface
314‧‧‧發光面 314‧‧‧Lighting surface
390‧‧‧第三單分光鏡 390‧‧‧ third single beam splitter
500‧‧‧反射鏡 500‧‧‧Mirror
圖1係現有光學系統之示意圖；圖2係本發明第一實施方式提供之光學系統之示意圖；圖3係本發明第二實施方式提供之光學系統之示意圖；圖4係本發明第三實施方式提供之光學系統之示意圖。 1 is a schematic view of an optical system according to a first embodiment of the present invention; FIG. 3 is a schematic view of an optical system according to a second embodiment of the present invention; and FIG. 4 is a third embodiment of the present invention; A schematic of the optical system provided.
200‧‧‧光學系統 200‧‧‧Optical system
201‧‧‧第一側 201‧‧‧ first side
202‧‧‧第二側 202‧‧‧ second side
203‧‧‧第三側 203‧‧‧ third side
204‧‧‧第四側 204‧‧‧ fourth side
211‧‧‧第一光源 211‧‧‧First light source
212‧‧‧第二光源 212‧‧‧second light source
213‧‧‧第三光源 213‧‧‧ Third light source
220‧‧‧聚光透鏡組 220‧‧‧Concentrating lens group
230‧‧‧雙分光鏡 230‧‧‧Double Beamsplitter
231‧‧‧第一單分光鏡 231‧‧‧First single beam splitter
232‧‧‧第二單分光鏡 232‧‧‧Second single beam splitter
240‧‧‧勻光鏡 240‧‧‧Double Mirror
241‧‧‧出光面 241‧‧‧Glossy surface
250‧‧‧中繼透鏡組 250‧‧‧Relay lens group
251‧‧‧第一中繼透鏡 251‧‧‧First relay lens
252‧‧‧第二中繼透鏡 252‧‧‧Second relay lens
260‧‧‧TIR棱鏡系統 260‧‧‧TIR prism system
270‧‧‧數位微鏡裝置 270‧‧‧Digital micromirror device
280‧‧‧鏡頭 280‧‧‧ lens
281‧‧‧進光面 281‧‧‧Into the glossy surface
Claims (4)
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| TWI383177B true TWI383177B (en) | 2013-01-21 |
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| CN112555693A (en) * | 2020-12-23 | 2021-03-26 | 广东奥普特科技股份有限公司 | Multicolor point light source |
| CN116624804A (en) * | 2023-06-07 | 2023-08-22 | 常州星宇车灯股份有限公司 | Compact vehicle-mounted DLP projection system and vehicle |
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| US20050219847A1 (en) * | 2004-03-31 | 2005-10-06 | Sanyo Electric Co., Ltd. | Illumination apparatus and video projection display system |
| TW200613885A (en) * | 2004-10-29 | 2006-05-01 | Cinetron Technology Inc | LED projection system |
| US20060262282A1 (en) * | 2005-05-20 | 2006-11-23 | 3M Innovative Properties Company | Multicolor illuminator system |
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| US20050219847A1 (en) * | 2004-03-31 | 2005-10-06 | Sanyo Electric Co., Ltd. | Illumination apparatus and video projection display system |
| TW200613885A (en) * | 2004-10-29 | 2006-05-01 | Cinetron Technology Inc | LED projection system |
| US20060262282A1 (en) * | 2005-05-20 | 2006-11-23 | 3M Innovative Properties Company | Multicolor illuminator system |
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