| 摘要 |
PURPOSE:To enable optical communication within a distance of several hundred meters with general-purpose LED emitting light of 650-660nm wavelength as a light source by forming a core with a polymer of a styrene deriv. contg. fluorine and a clad with a polymer having a lower refractive index than the polymer forming the core. CONSTITUTION:A polymer forming a core is preferably a homopolymer of a styrene deriv. contg. fluorine but may be a copolymer with other monomer. The styrene deriv. contg. fluorine is represented by the formula (where X is F or D, when X is F, each of Y<1>, Y<2> and Y<3> is H or D or Y<1> is methyl or deuterated methyl and each of Y<2> and Y<3> is H or D, and when X is D, each of Y<1>, Y<2> and Y<3> is F). 2,3,4,5,6-Pentafluorostyrene or 2,3,4,5,6-pentafluoro-alpha,beta,beta- trideuterostyrene may be used as the styrene deriv. A clad may be formed with any transparent polymer having a lower refractive index than the polymer forming the core. The polymer may be an alkyl methacrylate polymer contg. fluorine, a vinylidene fluoride-tetrafluoroethylene copolymer or a blend thereof. |
