Multi-layer body having optical-action elements for producing an optical effect
US8432589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2008 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Jun 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/2228
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multi-layer body having a carrier substrate and a transparent layer at least partially arranged in a window or in a transparent region of the carrier substrate. The transparent layer has at least a first subregion and a second subregion with a varying refractive index, which are arranged in mutually juxtaposed relationship in the layer plane defined by the transparent layer, and are at least partially arranged in the window or in the transparent region of the carrier substrate. Each of the subregions has a plurality of periodically arranged nodes which form an optical-action element for producing an optical effect which is different in the front view and in the rear view in the incident light mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.