Optical anti-counterfeiting element and manufacturing method thereof
US12257857B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 3, 2020 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Jan 15, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/286
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The disclose provides an optical anti-counterfeiting element and a manufacturing method of the optical anti-counterfeiting element, the optical anti-counterfeiting element includes: a substrate, the substrate has a first surface and a second surface which are opposite to each other; and an interference color layer located on the first surface of the substrate, the interference color layer is located in a non-hollow area of the optical anti-counterfeiting element and is not located in a hollow area, the interference color layer is a Fabry-Perot filter structure, an absorbing layer of the Fabry-Perot filter structure is in contact with the substrate, and a material of the absorbing layer is an alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.