Concentric optical path equalizer with radially moving mirrors
    6.
    发明授权
    Concentric optical path equalizer with radially moving mirrors 失效
    具有径向移动镜的同心光路均衡器

    公开(公告)号:US5912447A

    公开(公告)日:1999-06-15

    申请号:US783511

    申请日:1997-01-14

    IPC分类号: G06K7/10

    摘要: The optical path between a camera positioned above a conveyor and objects traveling on the conveyor is adjusted by moving a plurality of mirrors that at least partially define the optical path. The mirrors are manipulated as a function of the height of the objects so that the length of the optical path between each object and the camera is generally the same. The plurality of movable mirrors are equidistant from and arranged about a central point. The plurality of movable mirrors are contemporaneously moved toward and away from the central point to equalize the length of the optical path. Each of the movable mirrors translates along a different travel path. The travel paths are non-parallel. The plurality of movable mirrors are arranged so that the optical path includes a plurality of segments, and at least one intersection is defined between the segments distant from the movable mirrors.

    摘要翻译: 通过移动至少部分地限定光路的多个反射镜来调节位于输送机上方的相机和在输送机上行进的物体之间的光路。 作为物体的高度的函数来操纵反射镜,使得每个物体和相机之间的光路的长度通常是相同的。 多个可移动反射镜与中心点等距离并布置。 多个可移动反射镜同时朝向和远离中心点移动以均衡光路的长度。 每个可移动镜沿不同的行进路径平移。 行驶路径是不平行的。 多个可移动镜被布置成使得光路包括多个片段,并且在远离可移动镜的片段之间限定至少一个相交。