Unique prismatic element and projection system
    10.
    发明授权
    Unique prismatic element and projection system 失效
    独特的棱柱元素和投影系统

    公开(公告)号:US3917392A

    公开(公告)日:1975-11-04

    申请号:US11896371

    申请日:1971-02-25

    Applicant: POLAROID CORP

    Inventor: BING HERBERT A

    CPC classification number: G03B17/265

    Abstract: An optical system employing a novel element occupying a minimum of space and substantially extending the geometrical distance between the source of a converging beam of light and its focal point. In a preferred embodiment the novel element is prismatic in nature, has a low power factor and includes a light receiving concave transparent face, a flat reflective surface for redirecting the beam of light as it passes through the element and a convex transparent face through which the beam of light leaves the element, each of which transparent face is radially symmetric.

    Abstract translation: 一种采用新颖元件的光学系统占据了最小的空间,并且基本上延伸了会聚光束的光源与其焦点之间的几何距离。 在优选实施例中,新颖元件本质上是棱柱形的,具有低功率因数并且包括光接收凹透明面,用于在光束穿过元件时重新定向光的平坦反射表面,以及凸透明面 光束离开元件,每个透明面都是径向对称的。

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