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US 6,271,312 B1Granted
Graded-refractive-index optical plastic material of a fluoropolymer containing a material in a concentration gradient therein
AssigneeYasuhiro Koike
InventorsYasuhiro Koike, Masaki Naritomi
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Abstract
A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
Claims6
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 and a refractive index that varies continuously in said specific directions,
- has a transmission loss per 100 m of at most 1000 dB at wavelengths of from about 700 to about 1500 nm.
Dependencies are inferred from the claim text.