| abstract |
PROBLEM TO BE SOLVED: To provide a refractive index adjusting substance having good compatibility with a non-crystalline fluorine-containing polymer (A), and to thereby provide a polymer (A) composition having both high transparency and heat resistance. Optical transmission body consisting of In particular, a gradient index optical fiber is provided. A compound (B) selected from perfluoro (1,3,5-triphenylbenzene) or perfluoro (1,2,4-triphenylbenzene) is used as a refractive index adjusting substance, and is substantially C-H Polymer having no bond (A) An optical transmitter with a matrix. |