发明名称 |
Optically variable security device and method |
摘要 |
PROBLEM TO BE SOLVED: To provide an optically variable security device.SOLUTION: Provided is a security device comprising at least first and second superposed optically variable effect generating structures (3-5, 3'-5'). Each of the structures has a surface relief microstructure. The second optically variable effect generating structure is viewable through the first structure. |
申请公布号 |
GB0207750(D0) |
申请公布日期 |
2002.05.15 |
申请号 |
GB20020007750 |
申请日期 |
2002.04.03 |
申请人 |
LA RUE INTERNATIONAL, DE LIMITED |
发明人 |
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分类号 |
B42D15/10;B42D15/00;G02B5/18 |
主分类号 |
B42D15/10 |
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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