Optical lens comprising a protective removable film
US10562248B2 · kind B2 · utility
0Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2014 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Aug 4, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention concerns an optical lens comprising (i) a temporary coating at least partially covering a surface of the lens, said temporary coating comprising an outermost layer mechanically degradable through friction and/or contact; (ii) a removable film having opposite first side and second sides which adhere to said outermost layer through its first side, wherein—the first side of the film has a roughness Rq lower than 750 nm and the first side of the film has a surface energy lower than 38 mJ/m2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.