发明名称 |
COVERT SECURITY COATING |
摘要 |
A multilayer thin film filter is disclosed an organic dielectric layer serving as a spacer layer in a Fabry-Perot structure. The dielectric has embossed regions of varying thicknesses wherein the thickness within a region is substantially uniform. Each different region of a different thickness produces a different color (shift). The size of one of the embossed adjacent regions is such that the color of said one region is uniform and cannot be seen by a human eye as different in color from the uniform color of an adjacent region thereto, and wherein the color within a region can be seen with magnification of at least 10:1. This serves as a covert color coding system useful as a security device. |
申请公布号 |
CA2550190(C) |
申请公布日期 |
2015.03.17 |
申请号 |
CA20062550190 |
申请日期 |
2006.06.14 |
申请人 |
JDS UNIPHASE CORPORATION |
发明人 |
PHILLIPS, ROGER W.;BIE, ROY |
分类号 |
G02B5/20;G02B1/04;G02B5/22;G02B5/26 |
主分类号 |
G02B5/20 |
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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