发明名称 FRESNEL LENS FOR PROJECTION SCREENS
摘要 <p>The present invention is a screen, such as is used in back-lit projection screens, having a Fresnel lens laminated to another layer for support. The screen includes a Fresnel lens having an output surface, and a dispersing screen supportingly attached on a first side to the output surface of the Fresnel lens.</p>
申请公布号 WO2000042469(A1) 申请公布日期 2000.07.20
申请号 US1999010138 申请日期 1999.05.07
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