Patent ID: 8233225
Filing Date: 2012-07-31
Classification: C08G,G02B,Y10S

Abstract:
1. An optical lens obtained by injection molding a polyester resin containing a diol unit containing from 40 to 99% by mol of a unit derived from ethylene glycol and from 1 to 60% by mol of a unit derived from a diol having from 3 to 16 carbon atoms, and a dicarboxylic acid unit containing 50% by mol or more of a unit derived from a naphthalenedicarboxylic acid, and having the following property (1): (1) an Abbe number of a test piece formed by annealing an injection molded piece having a thickness of 3 mm at a temperature of (Tg−20)° C. for 10 hours is 25 or less.