Optical anti-counterfeiting element, product using same and preparation method therefor
US10155408B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 12, 2012 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Oct 8, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An optical anti-counterfeiting element comprises a base material (11). The base material (11) has a first surface and a second surface which are opposite to each other. The first surface is covered thereon with a micro-sampling tool (12); one part of the second surface is a micro image-text formed by a micro relief structure (13), and the other part thereof is a flat structure which does not form a micro image-text and/or a micro relief structure (14) which is different from the micro relief structure forming the micro image-text. The flat structure which does not form the micro image-text and the micro relief structure (14) different from the micro relief structure forming the micro image-text are homomorphically covered thereon with a first plating (15), the micro relief structure (13) forming the micro image-text is homomorphically covered thereon with a second plating (16), and the micro image-text is sampled by the micro sampling tool (12). Also provided is an anti-counterfeiting product using the optical anti-counterfeiting element and a preparation method therefor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.