Composite ophthalmic lenses
US5323191A · kind A · utility
38Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1992 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Jul 1, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is directed to the production of glass-plastic lenses consisting of a thin glass element bonded to a relatively thick transparent lens or lens preform made of poly(diethylene glycol)bis(allyl carbonate) by a transparent thermoset, polyurethane adhesive layer of optical quality having an elongation at rupture of at least 200% and an elastic modulus in the range of 0.13-10 MPa and at 100% elongation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.