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    • 3. 发明申请
    • CELL PHONE AUTHENTICATION DEVICE
    • 电话电话认证设备
    • WO2014120704A1
    • 2014-08-07
    • PCT/US2014/013476
    • 2014-01-29
    • EASTMAN KODAK COMPANY
    • PAWLIK, Thomas, D.BOSE, Judith, A.COK, Ronald, StevenBLISH, Nelson, A.
    • G07D7/12G07D7/00
    • H04N5/2254G06K7/10G07D7/005G07D7/12
    • A system for authenticating an object includes a label (12) with invisible indicia (14) on the object which rotates a polarization of incident light; a digital camera (18) having a light source (20), an image sensor (22), a first polarizing filter (24) having a first orientation, and a second polarizing filter (26) having a second orientation orthogonal to the first orientation; illuminating the label with light from the light source through the first linear polarizer; forming an image with the image sensor using reflected light from the label wherein the reflected light passes through the second polarizer prior to reaching the sensor; wherein the second linear polarizer makes the invisible indicia visible; and authenticating the object.
    • 用于认证对象的系统包括在物体上具有使入射光的偏振旋转的不可见标记(14)的标签(12); 具有光源(20)的数字照相机(18),图像传感器(22),具有第一取向的第一偏振滤光器(24)和具有与第一取向正交的第二取向的第二偏光滤光器 ; 用来自光源的光通过第一线性偏振器照射标签; 使用来自标签的反射光与图像传感器形成图像,其中反射光在到达传感器之前穿过第二偏振器; 其中所述第二线性偏振器使所述不可见标记可见; 并验证该对象。