Plastic lens
US5496641A · kind A · utility
55Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | Mar 5, 1996 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A plastic lens formed by laminating, in the order as described below, (A) a plastic lens substrate having a refractive index in the range of 1.50 to 1.70, (B) a primer layer containing a metal compound of at least one metal selected from the group consisting of Al, Ti, Zr, Sn and Sb and a polyurethane, or (B') a primer layer formed from a polyurethane containing at least one element selected from the group consisting of Cl, Br, I and S, (C) a hard coating layer, and (D) a single-layered or multi-layered anti-reflection layer formed by vapor-depositing an inorganic substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.