Patent ID: 8399371
Filing Date: 2013-03-19
Classification: C03C

Abstract:
1. An optical glass comprising in % by weight: 10% or more and 17% or less of SiO 23% or more and 30% or less of B 0.1% or more and 1% or less of Al 2% or more and 3.5% or less of Li 1% or more and 4% or less of BaO; 10% or more and 20% or less of CaO; 0.5% or more and 6% or less of ZnO; 22% or more and 30% or less of La 0.5% or more and 7% or less of Gd wherein the optical glass satisfies the following conditional expressions (1) and (2), wherein A is the content in % by the weight of SiO