Security device with a zero-order diffractive microstructure
US8824032B2 · kind B2 · utility
1Cited by
15References
17Claims
0Family size
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Inventors
Key dates
| Filing date | May 13, 2013 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | May 13, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/22
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A security device including a zero order diffractive microstructure buried within a substrate. One or more optical structures, such as microlenses, may be formed on a surface of the substrate. The optical structures modify the optical characteristics of the zero order diffractive microstructure. Various alternatives or additional optical structures and methods of producing the security device are described in additional embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.