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    • 3. 发明申请
    • OPTICAL READER MODULE AND OPTICAL READER
    • 光学读取器模块和光学读取器
    • US20120176655A1
    • 2012-07-12
    • US13334329
    • 2011-12-22
    • Akira Shirakura
    • Akira Shirakura
    • G03H1/22
    • G03H1/2205G03H2001/2244G03H2210/53G06K7/10732G06K19/06065
    • An optical reader module includes a first illumination light source that emits reproducing illumination light to an image-capture target containing a hologram in which information reproduced in a predetermined angle area when illuminated from a predetermined angle is recorded, thereby reproducing the information recorded in the hologram; an image-capturing device that captures an image of the information reproduced from the hologram; and a first light-projecting unit that projects first-optical-guide-forming light on the image-capture target. A first optical guide projected on the image-capture target takes a predetermined shape when the emission angle of the reproducing illumination light to the hologram is equal to the predetermined angle. An observer of the image-capture target recognizes misalignment between the emission angle of the reproducing illumination light to the hologram and the predetermined angle, based on distortion of the first optical guide projected on the image-capture target from the predetermined shape.
    • 一种光学读取器模块包括:第一照明光源,其向包含全息图的图像捕获目标发射再现照明光,其中记录从预定角度照射时在预定角度区域中再现的信息,从而再现记录在全息图中的信息 ; 拍摄从全息图再现的信息的图像的图像捕获装置; 以及第一光投射单元,其将第一光学引导成形光投影在图像捕获对象上。 当对全息图的再现照明光的发射角度等于预定角度时,投射在图像捕获目标上的第一光学引导器采取预定形状。 基于从预定形状投射到图像捕获目标上的第一光导的畸变,图像捕获目标的观察者识别再现照明光与全息图的发射角之间的偏差和预定角度。