发明名称 System and method for contrast enhancement in projection imaging system
摘要 An image projection system having a reflective imaging device and a projection device, characterized in that a quarter wave plate is provided between the reflective imaging device and projection lens in such manner as to suppress reflections from the projection lens from reaching the reflective imaging device while minimizing reflections from its own surface reaching the reflective imaging device. Preferably, the quarter wave plate is laminated to a polarizing beamsplitter exit face or to an optional linear polarizer sheet, to eliminate an air interface.
申请公布号 US6557999(B1) 申请公布日期 2003.05.06
申请号 US20000713854 申请日期 2000.11.16
申请人 KONINKLIJKE PHILIPS ELECTRONICS N.V. 发明人 SHIMIZU JEFFREY A.
分类号 G02B5/30;G02F1/13;G02F1/1335;G02F1/13363;G03B21/00;H04N5/74;(IPC1-7):G03B21/14 主分类号 G02B5/30
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