Optical security component with a reflective effect, production of such a component and secure document provided with such a component
US9770935B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D2035/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An optical security component designed to be observed in a spectral observation band of between 380 nm and 780 nm by direct reflection, comprising an observation face and identifiable information, the component successively including, starting from the side opposite the observation face, a first support layer, identification elements obtained by printing an absorbent material in at least part of the visible spectrum, with a low refractive index, to reproduce at least part of the identifiable information, at least part of the identification elements being structured on one of their faces opposite the face across from the support layer, to form a first subwavelength grating, a second layer, with a high refractive index, covering the first support layer and the identification elements, and a third layer, with a low refractive index, transparent in the observation spectral band of the component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.