| 发明名称 |
Optically variable security device |
| 摘要 |
An optically variable security device comprising a thin film reflection filter structure (23) which exhibits a first optically variable effect; and a relief structure (20) on or in the thin film reflection filter structure which exhibits a second optically variable effect.
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| 申请公布号 |
US2003058491(A1) |
申请公布日期 |
2003.03.27 |
| 申请号 |
US20020257212 |
申请日期 |
2002.10.10 |
| 申请人 |
HOLMES BRIAN WILLIAM;DRINKWATER KENNETH JOHN;KAY RALPH |
发明人 |
HOLMES BRIAN WILLIAM;DRINKWATER KENNETH JOHN;KAY RALPH |
| 分类号 |
B42D15/10;(IPC1-7):G03H1/00 |
主分类号 |
B42D15/10 |
| 代理机构 |
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