发明名称 |
DATA STORAGE IN A DIFFRACTIVE OPTICAL ELEMENT |
摘要 |
A diffractive optical element (DOE) and various methods of producing such a DOE are provided in which a diffractive optical microstructure is formed with encrypted data on at least one side of a transparent substrate or in a layer applied to the substrate. The diffractive optical microstructure when illuminated with collimated light, generates a far field interference pattern corresponding to the encrypted data which may be decrypted with suitable optical detectors and processing equipment. |
申请公布号 |
EP1977399(A1) |
申请公布日期 |
2008.10.08 |
申请号 |
EP20070701378 |
申请日期 |
2007.01.16 |
申请人 |
SECURENCY PTY. LTD. |
发明人 |
NEMETH, JOSHUA, ROBERT;POWER, GARY, FAIRLESS;STEWART, ROBERT |
分类号 |
G07D7/12;B42D15/10;B44F1/12;G02F7/00;G06K19/16;G07D7/00;G07D7/20 |
主分类号 |
G07D7/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|