Optical reading of a security element
US11093726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Feb 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/95
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to a first aspect of the present invention, there is provided a method of determining a unique identifier for a security element, the method comprising: optically reading the security element, the security element comprising a number of emitters that are each capable of exhibiting a different emission response to excitation of the number of emitters; the reading comprising determining data indicative of an optical property of the security element using first emission electromagnetic radiation, emitted in response to first excitation of the number of emitters, and determining data indicative of an optical property of the security element using second emission electromagnetic radiation, emitted in response to second, different, excitation of the number of emitters; and the unique identifier being determined from a map of a variation in determined data indicative of an optical property with respect to the excitation of the number of emitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.