LENS MADE OF SYNTHETIC RESIN

摘要

PROBLEM TO BE SOLVED: To produce a lens made of a synthetic resin exhibiting a high refractive index, good moldability and excellent optical characteristics. SOLUTION: The objective lens is composed of a copolymer comprising 20-60 wt.% of a component A below and 80-40 wt.% of a component B comprising a monomer copolymerizable with the component A and has a refractive index of at least 1.56: The component A: an unsaturated alkyd obtained by polycondensation of an unsaturated dibasic acid and an aromatic saturated dibasic acid with glycols; The component B: a monomer copolymerizable with the component A.