Patent ID: 11952311
Assignee: CDGM GLASS CO., LTD
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 4:
5. The optical glass according to claim 1, in terms of oxide mass percentages, the optical glass consists of B2O3: 5-25%, SiO2: 0.5˜15%, ZrO2: 1-15%, TiO2: 0.5-10%, ZnO: 0-15%, BaO: 0-10%, CaO: 0-10%, SrO: 0-10%, MgO: 0-10%, WO3: 0-10%, Ta2O5: 0.5-10%, the sum of Li2O, Na2O and K2O is 0-10%, Sb2O3: 0-1%, and the sum of La2O3, Gd2O3, Y2O3 and Yb2O3 is 63.6-75%, wherein, the weight ratio of La2O3 to Gd2O3, i.e., La2O3/Gd2O3, is 1.28-1.625.