Patent ID: 9416047
Filing Date: 2016-08-16
CPC Classification: C03B,C03C,G02B

Claim Text:
1. An optical glass comprising: in mass %, 15 to 37% of B 15 to 45% of TiO 12 to 40% of BaO, SrO, CaO, MgO, K 0 to 3%© of Li 0% of La wherein the optical glass has: a mass ratio (B a mass ratio (TiO a mass ratio ((BaO+SrO+CaO)/(BaO+SrO+CaO+MgO+K a mass ratio ((K the optical glass substantially contains no PbO, and the optical glass has a refractive index nd of 1.78 to 1.84, and an Abbe's number νd of 26 to 32.