Graded-refractive-index optical plastic material and method for its production
US5760139A · kind A · utility
34Cited by
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5Claims
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Key dates
| Filing date | Jun 7, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02033
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which substantially has no C-H bond and at least one material (b) which 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.