Security document having a personalized image formed from a metal hologram and method for the production thereof
US12233659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2020 |
| Grant date | Feb 25, 2025 |
| Priority date | — |
| Expiry date | Feb 4, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/435
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A secure document including a first layer having a metal holographic structure forming an arrangement of pixels each including a plurality of sub-pixels of distinct colors and a second layer positioned facing the first layer, the second layer being opaque to at least the visible wavelength spectrum. The first layer includes perforations formed by a first laser beam, the first perforations locally revealing through the holographic structure a number of dark areas in the sub-pixels caused by underlying regions of the second opaque layer such as to form a personalized image starting from the arrangement of pixels combined with the dark areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.