发明名称 |
Optical security marking component, method of manufacturing such a component, system comprising such a component, and reader for checking such a component |
摘要 |
The present invention relates to an optical security marking component producing a first visible configuration when observed through a polarizer oriented in a first orientation, and a second configuration, separate from the first, visible when observed through the polarizer oriented in a second orientation, the optical component comprising a stamped film for forming at least two diffraction gratings having different orientations, characterized in that each of said gratings has a period of less than 550 nm and a modulation between 0.25 and 0.5 relative to a reference plane.
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申请公布号 |
US8488223(B2) |
申请公布日期 |
2013.07.16 |
申请号 |
US20070299200 |
申请日期 |
2007.05.02 |
申请人 |
PETITON VALERY;NOIZET ALEXANDRE;HOLOGRAM INDUSTRIES |
发明人 |
PETITON VALERY;NOIZET ALEXANDRE |
分类号 |
G03H1/00 |
主分类号 |
G03H1/00 |
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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