| 发明名称 |
TRANSPARENT OPTICALLY VARIABLE DEVICE |
| 摘要 |
Transparent optically variable device comprising a symmetric three-layer coating. The three-layer coating has first and second partially transmitting absorber layers and a dielectric spacer layer disposed between the first and second absorber layers.
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| 申请公布号 |
CA2015301(C) |
申请公布日期 |
1999.09.21 |
| 申请号 |
CA19902015301 |
申请日期 |
1990.04.24 |
| 申请人 |
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发明人 |
COOMBS, PAUL G.;PHILLIPS ROGER W. |
| 分类号 |
G02B5/28;(IPC1-7):G02B1/00;G02B1/10;G02B5/20 |
主分类号 |
G02B5/28 |
| 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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