Optical anti-counterfeiting element and anti-counterfeiting product
US12350951B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 18, 2020 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Jan 3, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/351
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided are an optical anti-counterfeiting element and an anti-counterfeiting product. The optical anti-counterfeiting element comprises: a substrate, which comprises a first surface and second surface that are opposite one another, and a surface micro-structure layer that is formed on at least part of the first surface of the substrate. At least part of the surface micro-structure layer comprises a first set of at least a micro-prism, and the micro-prism is simultaneously provided with a refractive and a reflective function. Each pixel of a first pattern corresponds to one or more micro-prism refractive illumination spots in the first set of micro-prisms. The described optical anti-counterfeiting element can provide various anti-counterfeiting effects and improve the anti-counterfeiting performance of the anti-counterfeiting element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.