Optical switch devices
US11618275B2 · kind B2 · utility
7Cited by
46References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2020 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Dec 22, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B30/27
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A security device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. At least one first or second segment can include one or more microstructures or one or more nanostructures configured to produce one or more colors for the first or second image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.