Plastic lens
US6780965B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Sep 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A plastic lens, an optical molded article, a film or a sheet formed of a copolycarbonate resin comprising a structural unit (I) of the following general formula (I), and a structural unit (II) of the following formula (II), the structural unit (I) having a molar amount percentage of 15 to 85% on the basis of the total amount of the structural units (I) and (II).According to the present invention, there are provided a plastic lens, an optical molded article, and the like, which are excellent in physical properties such as transparency, thermal stability and impact resistance and are excellent in optical properties such as a balance between a refractive index and an Abbe's number and a photoelasticity constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.