PRODUCTION OF PLASTIC OPTICAL TRANSMISSION BODY

摘要

PURPOSE:To obtain a continuous refractive index distribution by molding a mixture composed of a monomer A and a polymer B to a fiber shape, then diffusing a monomer C which forms a polymer of low refractive index into the fiber from the outer peripheral part thereof after the polymerization of a part of the monomer A. CONSTITUTION:The mixture 1 composed of the monomer A and the polymer B is inserted into a cylinder 3 and is extruded from a nozzle 4 by a piston 2 and is thereby molded to a fiber shape; thereafter, the monomer A is partly polymerized in a part 5 for irradiation with active rays. The monomer C which has the refractive index lower than the refractive index of the polymer of the monomer A after polymn. is diffused into the fiber from the outer peripheral part thereof in a diffusing chamber 6 to form the concn. distribution of the monomers A and C from the center toward the outer periphery. The monomers are then polymerized in a part 7 for irradiation with active rays to obtain the optical transmission body 9. The optical transmission body having the continuous refractive index distribution is obtd. in this way.