发明名称 |
Method and apparatus for making and detecting a document verification indicator using optical pattern encryption |
摘要 |
A method and apparatus for creating and detecting an optically encoded document having a uniquely designed document verification indicator is disclosed. One embodiment includes applying a spatially varying Brewster angle pattern on a substrate. Another embodiment includes an apparatus for detecting the spatially varying Brewster angle pattern including a light source, a slit aperture, a polarizer, at least one parabolic mirror, and an image capturing device.
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申请公布号 |
US7699236(B2) |
申请公布日期 |
2010.04.20 |
申请号 |
US20050111639 |
申请日期 |
2005.04.21 |
申请人 |
RUTGERS THE STATE UNIVERSITY |
发明人 |
DANA KRISTIN;LIVESCU GABRIELA;LU YICHENG |
分类号 |
G06K19/06;G07D7/12;G07D7/20;H04L9/00 |
主分类号 |
G06K19/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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