发明名称 |
Optisches Identifikationselement |
摘要 |
An optical component in the form of an identification element (such as for counterfeit protection or copy protection) includes an optically anisotropic layer comprising regions of different optical axes that is arranged over a reflector. The anisotropic layer may be implemented with a liquid crystal polymer in which the orientation of the liquid crystals is different in different areas. Such an orientation pattern is initially hidden from a viewer, but becomes visible by means of an additional polariser. To improve the visual appearance of the identification element, a white light hologram may be used for the reflector. |
申请公布号 |
DE19983080(T1) |
申请公布日期 |
2001.05.17 |
申请号 |
DE1999183080T |
申请日期 |
1999.04.06 |
申请人 |
ROLIC AG, ZUG |
发明人 |
SEIBERLE, HUBERT;MOIA, FRANCO;SCHADT, MARTIN |
分类号 |
B42D25/00;B42D25/328;G06K19/16 |
主分类号 |
B42D25/00 |
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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