Optical security component
US6943952B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2004 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Oct 7, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/0032
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical security component for authenticating a document or a product including a transparent plastic film embossed to form an embossed surface and to have at least one diffraction grating; a layer of dielectric material of high optical index at least partially coated on the embossed surface and producing a colored effect of a first color for a first orientation of the component and a second different color for orientation perpendicular to the first orientation; a low optical index layer coated on a side opposite the viewing direction of the dielectric material; and a colored contrast layer having transparent zones and colored zones on the low optical index layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.