| 发明名称 |
OPTICALLY VARIABLE DIFFRACTIVE DEVICE AND RELATED APPARATUS AND METHOD OF READING |
| 摘要 |
The present invention provides for an optically variable diffractive device including a diffractive structure arranged such that, when illuminated, the diffractive structure provides optical information from which a signal can be derived, which signal can serve to deliver an acoustic output determined by the said diffractive structure. |
| 申请公布号 |
EP1671263(A2) |
申请公布日期 |
2006.06.21 |
| 申请号 |
EP20040768559 |
申请日期 |
2004.09.20 |
| 申请人 |
OPTAGLIO LIMITED |
发明人 |
RYZI, ZBYNEK;TETHAI, THOMAS |
| 分类号 |
B42D15/00;B42D15/10;G06K19/06;G07D7/12;(IPC1-7):G06K19/06 |
主分类号 |
B42D15/00 |
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