Light-absorbing and anti-reflective coating for sunglasses
US5729323A · kind A · utility
40Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1994 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Jul 29, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A sunglass lens having improved anti-reflection and transmittance comprises a lens-shaped substrate and a coating formed on the concave surface of the lens. The first layer deposited adjacent to the concave surface of the lens comprises a titanium suboxide material, the second layer comprises a material having a high refractive index, and the third layer comprises a material having a low refractive index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.