Graded-refractive-index optical plastic material and method for its production
US5916971A · kind A · utility
20Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1996 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Jun 6, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/046
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which has substantially no C--H bond and at least one material (b) which has substantially no C--H bond and differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction, and the optical plastic material has a glass transition temperature which is substantially uniform throughout it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.