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    • 2. 发明授权
    • Optical relay lens system for projection displays
    • 用于投影显示的光学中继透镜系统
    • US5597222A
    • 1997-01-28
    • US373696
    • 1995-01-17
    • Fuad E. DoanyRama N. Singh
    • Fuad E. DoanyRama N. Singh
    • G02B13/00G03B21/14
    • H04N9/3152G02B13/0095H04N9/3105
    • A projection display which includes reflective light valves such as liquid crystal spatial light modulators, and a 1.times. optical relay lens system. The 1.times. optical relay lens system eliminates the requirement for a projection lens having a large retrofocus distance. Projection displays based upon reflective liquid crystal light valves (spatial light modulators) require dichroic beam splitters necessary for color separation and a polarizing beam splitter necessary for light valve operation positioned between the light valves and the projection lens. The 1.times. optical relay lens produces a relayed intermediate image of the light valves, and incorporates therein the dichroic beam splitters and the polarizing beam splitter. The 1.times. optical relay lens produces an intermediate image which is projected by the projection lens at a given magnification with minimal working distance, which results in relatively less residual lateral color and an inexpensive projection lens.
    • 包括诸如液晶空间光调制器的反射光阀和1x光学中继透镜系统的投影显示器。 1x光学中继透镜系统消除了对具有大的后向聚焦距离的投影透镜的要求。 基于反射型液晶光阀(空间光调制器)的投影显示器需要用于分色所需的二向色分束器和位于光阀和投影透镜之间的光阀操作所需的偏振分束器。 1x光学中继透镜产生光阀的中继中间图像,并且其中包括二向色分束器和偏振分束器。 1x光学中继透镜产生中间图像,该中间图像由投影透镜以给定的放大倍率投影,工作距离最小,这导致相对较少的剩余侧面颜色和便宜的投影透镜。