Spectacle lens provided with a permanent marking
US11113487B2 · kind B2 · utility
2Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2017 |
| Grant date | Sep 7, 2021 |
| Priority date | — |
| Expiry date | Sep 7, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/00326
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A spectacle lens includes a substrate and an anti-reflection or mirror interference coating covering the substrate on the side of the front face, the interference coating forming a one-dimensional or two-dimensional bar code pattern, the marking being formed by a plurality of point holes on a portion of a thickness of the interference coating, the front face having, away from the point holes, a coefficient of reflection of light having a predetermined nominal value and, in each the point hole, a coefficient of reflection of light having a particular predetermined value that is different from the nominal value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.