Optical products, masters for fabricating optical products, and methods for manufacturing masters and optical products
US12078821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2020 |
| Grant date | Sep 3, 2024 |
| Priority date | — |
| Expiry date | Oct 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/0011
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An optical product can be configured to be an anti-counterfeit feature such as a patch, a window, or a thread on a banknote. The optical product can be configured, when illuminated, to reproduce by reflected or refracted light, a 3D image of at least a part of a 3D object. The optical product can include a first surface and a second surface opposite the first surface. The second surface can include a plurality of portions. Each portion can correspond to a point on a surface of the 3D object. Each portion can include features corresponding to non-holographic elements on the optical product. A gradient in the features can correlate to an inclination of the surface of the 3D object at the corresponding point. An orientation of the features can correlate to an orientation of the surface of the 3D object at the corresponding point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.