Optical authentication component and method of fabricating said component
US9134468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2011 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/1861
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An optical authentication component visible in reflection having a structure imprinted on a substrate of index n0, a thin layer, made of a dielectric material having a refractive index n1, deposited on the structure, and a layer made of a material having an index n2 similar to n0, encapsulating the structure coated with the thin layer, is disclosed. The structure has a first pattern modulated by a second pattern, the first pattern is a bas-relief with an array of facets, having shapes which are defined to simulate an image in relief of an object in relief, and the second pattern is a periodic grating that modulates the first pattern which produces, after the thin layer has been deposited and the structure has been encapsulated, a first color at a first viewing angle and a different second color at a second viewing angle, obtained by azimuthal rotation of the component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.