Ophthalmic lens made of organic glass with a shockproof intermediate layer, and method for making same
US6051310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 1997 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | May 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31667
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An ophthalmic lens consisting of a substrate made of organic glass, of an abrasion-resistant coating, of a layer of impact-resistant primer and of an inorganic antireflective coating, wherein the surface of the said substrate is covered with the abrasion-resistant coating and in that the impact-resistant primer layer is inserted between the said abrasion-resistant layer and the anti-reflective coating, wherein the abrasion-resistant coating comprises a hydrolyzate or a mixture of hydrolyzates of a silane compound of formula: ##STR1## in which: R.sup.1 denotes an organic group containing an epoxy group; PA0 R.sup.2 is a hydrocarbon radical which has 1 or 2 carbon atoms; and PA0 R.sup.3 is a hydrocarbon group which has from 1 to 4 carbon atoms, and a is 0 or 1 in value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.