| 发明名称 |
METHOD AND APPARATUS FOR PRODUCING A COVERT HOLOGRAPHIC IMAGE |
| 摘要 |
A hologram having a covert image is made by recording on the hologram an object beam that will reconstruct an unrecognizable, scrambled image. The scrambled image can be modified to form a recognizable image by passing the scrambled image through a plate overlying the hologram. |
| 申请公布号 |
EP0904571(A4) |
申请公布日期 |
1999.09.22 |
| 申请号 |
EP19970928732 |
申请日期 |
1997.06.06 |
| 申请人 |
SIMIAN COMPANY, INC. |
发明人 |
HAINES, KENNETH, A.;HAINES, DEBBY, L. |
| 分类号 |
B42D15/10;G03H1/04;(IPC1-7):G03H1/00;G02B5/32;G03H1/08;G03H1/30;B42D15/00 |
主分类号 |
B42D15/10 |
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