发明名称 |
Security label for document, credit card or compact disc includes dielectric, visible light-diffraction microstructure producing image by reflection whilst transmitting infra red rays transparently |
摘要 |
The image-forming layer is constructed as a dielectric layer (14). This reflects radiation in the visible waveband, and is transparent to radiation in the infra red waveband
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申请公布号 |
DE19945642(A1) |
申请公布日期 |
2001.04.05 |
申请号 |
DE1999145642 |
申请日期 |
1999.09.23 |
申请人 |
TOPAC MULTIMEDIAPRINT GMBH |
发明人 |
SCHROEDER, ERHARD |
分类号 |
B42D25/328;G06K19/16;G09F3/02;(IPC1-7):G06K19/02 |
主分类号 |
B42D25/328 |
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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