Brightness indicating comparison device
    13.
    发明授权
    Brightness indicating comparison device 失效
    亮度指示比较器件

    公开(公告)号:US3644048A

    公开(公告)日:1972-02-22

    申请号:US3644048D

    申请日:1970-06-23

    CPC classification number: G01J1/124 G01J1/12

    Abstract: Reference light having a first color within a predetermined spectral range is combined with a colored part of the light to be measured which has passed through a filter having a second color within a spectral range complementary to the predetermined range. When the combined light assumes a third color, the brightness of the measured light is equal to the predetermined brightness of the reference light. Reflecting grid surfaces are used for deflecting the reference light into the path of the colored part of the measured light.

    Abstract translation: 具有预定光谱范围内的第一颜色的参考光与已经通过具有与预定范围互补的光谱范围内的第二颜色的滤光器的被测光的有色部分组合。 当组合的光呈现第三种颜色时,所测量的光的亮度等于参考光的预定亮度。 反射栅格表面用于将参考光偏转到测量光的有色部分的路径中。

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