首页> 外国专利> REFLECTIVE LIGHTING OPTICAL SYSTEM, PARTICULARLY CONCERNED WITH MINIMIZING A BACK FOCAL LENGTH(BFL) AND AN OPTICAL SYSTEM HEIGHT WHILE INCREASING LIGHTING EFFICIENCY BY DISPOSING A FLAT PBS(POLARIZED BEAM SPLITTER) IN SQUARE FORM BASED ON A SHORT DIRECTION OF AN IMAGER

REFLECTIVE LIGHTING OPTICAL SYSTEM, PARTICULARLY CONCERNED WITH MINIMIZING A BACK FOCAL LENGTH(BFL) AND AN OPTICAL SYSTEM HEIGHT WHILE INCREASING LIGHTING EFFICIENCY BY DISPOSING A FLAT PBS(POLARIZED BEAM SPLITTER) IN SQUARE FORM BASED ON A SHORT DIRECTION OF AN IMAGER

机译：反射式照明光学系统，特别是通过将散焦的PBS（偏光分束器）放置在基于正方形的扁平形PBS（偏光分束器）中以提高照明效率的同时，特别考虑了最小化后焦距（BFL）和光学系统高度

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PURPOSE: A reflective lighting optical system is provided to dispose a flat PBS(Polarized Beam Splitter) in square form based on a short direction of an imager, thereby minimizing a BFL(Back Focal Length) and an optical system height while increasing a lighting efficiency. CONSTITUTION: A lamp(41) radiates RGB lights. The first dichroic mirror(43) reflects the B light while transmitting the RG lights, and separates into two paths. The second dichroic mirror(44) transmits the R light while reflecting the G light. The first PBS(45a) transmits the reflected G light to the second imager(46b). The second flat PBS(45b) transmits the transmitted R light to a red relay system. The third flat PBS(45c) transmits a light passing through the red relay system for compensating for an optical path of the R light to the first imager(46a). The fourth flat PBS(45d) transmits the reflected B light to the third imager(46c). An X-prism(47) synthesizes the RGB lights, so that the synthesized RGB lights can be incident on a projecting lens(48).

机译：目的：提供一种反射式照明光学系统，可根据成像器的短边方向以正方形形式放置平坦的PBS（偏振分束器），从而在提高照明效率的同时将BFL（后焦距）和光学系统高度减至最小。组成：一盏灯（41）发出RGB灯。第一二向色镜（43）在透射RG光的同时反射B光，并分成两个路径。第二分色镜（44）在反射G光的同时透射R光。第一PBS（45a）将反射的G光透射到第二成像器（46b）。第二平坦PBS（45b）将透射的R光传输到红色中继系统。第三平面PBS（45c）将穿过红色中继系统的光传输到第一成像器（46a），以补偿R光的光路。第四平坦PBS（45d）将反射的B光透射到第三成像器（46c）。 X棱镜（47）合成RGB光，使得合成的RGB光可以入射在投影透镜（48）上。

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公开/公告号KR20040098354A

专利类型
公开/公告日2004-11-20

原文格式PDF
申请/专利权人 LG ELECTRONICS INC.;
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申请/专利号KR20030030674
发明设计人 KANG HO JUNG;
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申请日2003-05-14
分类号H04N5/74;
国家 KR
入库时间 2022-08-21 22:06:33

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