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    Code reading system for identification of moving and stationary objects utilizing noncoherent optics
    1.
    发明授权
    Code reading system for identification of moving and stationary objects utilizing noncoherent optics 失效
    用于识别运动和静止对象的代码读取系统使用非易失性光学

    公开(公告)号：US3700907A

    公开(公告)日：1972-10-24

    申请号：US3700907D

    申请日：1971-07-20

    Applicant: HUGHES AIRCRAFT CO

    Inventor： MYER JON H ,  O'MEARA THOMAS R ,  RICHARDSON JOHN M

    IPC: B61L25/04 ,  B65G47/49 ,  G01D5/38 ,  G06K7/10 ,  G01N21/30

    CPC classification number: G06K7/10861 ,  B61L25/041 ,  B65G47/493 ,  G01D5/38

    Abstract: For purposes of material handling and inventory management of railway cars, trucks, crates, packaged and unpackaged goods, and similar objects, markings, comprising a plurality or a composite of coded patterns, on such moving and stationary objects are used for their identification or identification of their contents. To permit such identification, an extended source of spatially incoherent light is modulated by passage through or reflection from the markings to provide input images of the coded patterns. The input images are projected through a pair of plates each having a Fresnel zone thereon for transformation of the input images into output signals corresponding to the optical Fourier transforms of the input images. Since the spatial positions and angular orientations of the output signals are dependent upon the spatial frequencies and orientations of the input images, the coded markings comprise a plurality of distinct patterns of different orientation and spatial frequency which can be correlated to a numerical identification system corresponding to information concerning the objects. The system is designed to operate as close to the geometrical optics limit as is practically feasible.

    Abstract translation: 为了进行铁路车辆，卡车，箱子，包装和未包装物品的物料搬运和库存管理以及类似物体，在这些移动和固定物体上包括多个或复合的编码图案的标记用于其识别或识别 的内容。 为了允许这种识别，通过从标记的通过或反射来调制空间非相干光的扩展源，以提供编码图案的输入图像。 输入图像被投影通过一对板，每个板上都有菲涅耳区，用于将输入图像转换为对应于输入图像的光学傅立叶变换的输出信号。 由于输出信号的空间位置和角度取向取决于输入图像的空间频率和取向，所以编码标记包括不同取向和空间频率的多个不同图案，其可以与对应于 有关物体的信息。 该系统设计为在几何光学极限附近操作，实际上可行。

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