Diffractive optical elements as combiners
    11.
    发明授权
    Diffractive optical elements as combiners 失效
    衍射光学元件作为组合器

    公开(公告)号:US5694230A

    公开(公告)日:1997-12-02

    申请号:US481587

    申请日:1995-06-07

    Inventor: W. Hudson Welch

    Abstract: A combiner for combining light traveling on two optical paths to permit coincident viewing of the light includes a light-transmissive substrate having first and second surfaces, the first surface having a first diffractive structure that is a computer-generated hologram formed thereon configured to correct aberrations in light travelling on the first optical path which may be incident on the first surface and a partially reflective coating on the first diffractive structure, the partially reflective coating being reflective in a narrow bandwidth only, the first diffractive structure and the partially reflective coating configured to provide corrected reflection to light travelling on the first optical path, the second surface having a second diffractive structure that is a computer-generated hologram formed thereon as a conjugate of the first diffractive structure, so that light travelling on a second optical path which may be incident on the second surface passes through the second and first diffractive structures with substantially no net affect, whereby a viewer may look at the first surface and see the corrected reflection of the light travelling on the first optical path combined with the substantially unaffected light travelling on the second optical path.

    Abstract translation: 用于组合在两个光路上行进以允许重复观察光的组合器包括具有第一和第二表面的透光基底,所述第一表面具有第一衍射结构,其是形成在其上的计算机生成的全息图,其被配置为校正像差 在可以入射在第一表面上的第一光路上行进的光和在第一衍射结构上的部分反射涂层,部分反射涂层仅在窄带宽中反射,第一衍射结构和部分反射涂层被配置为 对在第一光路上行进的光提供校正反射,第二表面具有第二衍射结构,其是形成在其上的计算机生成的全息图作为第一衍射结构的共轭,使得在第二光路上行进的光可以是 第二个表面上的事件通过第二个表面 d个基本上没有净影响的第一衍射结构,由此观看者可以观察第一表面并且看到与在第二光路上行进的基本上未受影响的光结合的第一光路上行进的光的校正反射。

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