Security feature based on a single axis alignment of mirrors in a structured surface that forms a micro mirror array
US11554603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2021 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Apr 15, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/29
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.