Lightweight laminated photochromic lenses
US4268134A · kind A · utility
125Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1979 |
| Grant date | May 19, 1981 |
| Priority date | — |
| Expiry date | Mar 7, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photochromic glass/plastic laminated lens of improved physical durability comprising a buried layer of photochromic glass, surface layers of optically clear plastic, and adhesive bonding layers of high strength but low elastic modulus between the buried glass and plastic surface layers, is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.