Anisotropic optical device with varying local imagewise and method for making same
US8111352B2 · kind B2 · utility
8Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2005 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Apr 17, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a new optical component comprising an anisotropic diffuser (5,10) with patterned anisotropy; and means (9, 11, 14, 16, 17, 20, 21, 30, 32) for providing a colorshift observable upon changing viewing angle (6) and/or changing angle of incident light (2). It also relates to methods for making such an optical component and uses of such optical components as security elements with a very high level of security.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.