Heat resistant plastic optical fiber

Claim 2

A heat resistant plastic optical fiber having a three component structure of a core, a cladding and a sheath, wherein the core material comprises an amorphous transparent polymer, the cladding material comprises a transparent polymer having a refractive index lower than that of the core material, and the sheath material comprises a resin which is hardenable by irradiation with ultraviolet rays and is selected from the group consisting of epoxy acrylate-based resins, 1,2-polybutadiene-based resins having an acryl group and thiol-ene type resins.

Claim 3

The heat resistant plastic optical fiber as claimed in claim 1, wherein the amorphous transparent polymer is a polymer selected from the group consisting of polystyrene, polymethyl methacrylate, polycarbonate, polymers of styrene derivatives selected from α-methylstyrene, p-phenylstyrene and p-t-butylstyrene, polymers of deuterium compounds of these styrene derivatives, polymers of methacrylate derivatives selected from ethyl methacrylate, butyl methacrylate, phenyl methacrylate, benzyl methacrylate, p-cyanophenyl methacrylate and isobornyl methacrylate, polymers of deuterium compounds of these methacrylate derivatives and copolymers of styrene, methyl methacrylate, styrene derivatives and methacrylate derivatives.

Claim 4

The heat resistant plastic optical fiber as claimed in claim 1, wherein the transparent polymer used as a cladding material is a polymer selected from the group consisting of polymers of styrene derivatives with their hydrogen atom being substituted with a fluorine atom, polymers of methacrylate derivatives with their hydrogen atom being substituted with a fluorine atom, copolymers of these methacrylate derivatives, fluorine-substituted polycarbonate, polyvinylidene fluoride, vinylidene fluoride-tetrafluoroethylene copolymers, vinylidene fluoride-hexafluoropropylene copolymers, vinylidene fluoride-tetrafluoroethylenehexafluoropropylene terpolymers, silicone resins and ethylene-vinyl acetate copolymers.

Claim 5

The heat resistant plastic optical fiber as claimed in claim 1, wherein the amorphous transparent polymer used as a core material is polymethyl methacrylate, the transparent polymer used as a cladding material is a vinylidene fluoride-tetrafluoroethylene copolymer, and the resin which is hardenable by irradiation with ultraviolet rays is a thiol-ene type resin.

Claim 6

The heat resistant plastic optical fiber as claimed in claim 1, wherein the amorphous transparent polymer used as a core material is polymethyl methacrylate, the transparent polymer used as a cladding material is a vinylidene fluoride-tetrafluoroethylene copolymer, and the resin which is hardenable by irradiation with ultraviolet rays is an epoxy acrylate-based resin.

Claim 7

The heat resistant plastic optical fiber as claimed in claim 1, wherein the amorphous transparent polymer used as a core material is a polycarbonate, the transparent polymer used as a cladding material is a vinylidene fluoride-tetrafluoroethylene copolymer, and the resin which is hardenable by irradiation with ultraviolet rays is a thiol-ene type resin.