Optically variable ghost image with embedded data
US11267276B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 22, 2017 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Dec 22, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/06103
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Techniques are described to embed graphical identifiers into a ghost image within a layer of laminate of an identification document. The ghost image includes optically variable media that has a first appearance when viewed from a front of the identification document in reflected light at a first angle and a second, different appearance when viewed from the front of the identification document in reflected light in a second, different angle. During the ghost image generation process, a graphical identifier can be placed on a baseline ghost image to generate an adjusted ghost image. Once the adjusted ghost image is printed onto the identification document, the graphical identifier can be viewable based on the appearance of the adjusted ghost identifier in relation to the reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.