Patent ID: 8741795
Filing Date: 2014-06-03
Classification: C03B,C03C

Abstract:
1. An optical glass comprising, by mol %, 0.1 to 40% of SiO 10 to 50% of B 0 to 10% of total of Li 0 to 10% of total of MgO, CaO, SrO and BaO, 0.5 to 22% of ZnO, 5 to 50% of La 0.1 to 25% of Gd 0.1 to 20% of Y 0 to 20% of Yb 0 to 25% of ZrO 0 to 25% of TiO 0 to 20% of Nb 0 to 7% of Ta over 0.1% but not more than 20% of WO 0 to less than 3% of GeO 0 to 10% of Bi 0 to 10% of Al the mass ratio of the content of SiO