Patent ID: 11878938
Assignee: CDGM GLASS CO., LTD
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G | IPC C

Claim 0:
1. An optical glass, comprising:
5 to 25 wt % of B2O3; 
25 to 45 wt % of La2O3; 
0 to 10 wt % of Y2O3; 
10 to 35 wt % of Gd2O3; 
0.5 to 15 wt % of SiO2; 
1 to 15 wt % of ZrO2; 
0 to 5 wt % of TiO2; 
0 to 7 wt % of WO3; 
0 to 15 wt % of Ta2O5; 
0 to 10 wt % of ZnO; and
0 to 8.5 wt % of Nb2O5, 
wherein m(B2O3+SiO2+ZrO2+Nb2O5+TiO2+WO3)/m(La2O3+ZrO2) is not lower than 0.6 and not more than 0.7, and m(ZrO2+TiO2+La2O3)/m(Nb2O5+SiO2+WO3+Gd2O3)ranges from 1.35 to 1.6.