Authentication of a laser shot in a holographic matrix
US8125697B2 · kind B2 · utility
9Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2007 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Jul 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/603
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The authentication process comprises: a step of transferring a holographic matrix onto a base, a step of marking the holographic matrix by laser shot, in order to produce a digital code that cannot be interpreted by the human eye preserving the optical diffraction properties of the holographic matrix, and designed to enable the detection of a copy of a document realized using the holographic matrix. Preferentially, during the marking step, the impact of each laser shot presents a greater dimension and a depth allowing the hologram's optical diffraction properties to be preserved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.