Combination microlens optical device
US11016224B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2016 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Dec 28, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/425
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An optical device, preferably a security device for a security document, including a substrate having a first side and a second side, an arrangement of microlenses located on the first side and an arrangement of microimages such that the microimages are viewable or can be made viewable through the microlenses, wherein the arrangement of microlenses includes first and second microlenses and wherein the arrangement of microimages includes first and second microimages, wherein the first microlenses and first microimages are configured for providing a first visual effect and wherein the second microlenses and second microimages are configured for providing a second visual effect, and wherein the first microlenses are of a different height with respect to the substrate than the second microlenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.