| 摘要 |
The invention provides a kind of high-precision molding optical glass, comprising 0.1-10 wt % of SiO2, 9-20 wt % of B2O3, 20-35 wt % of La2O3, 1-8 wt % of ZrO2, 5-20 wt % of ZnO, 1-10 wt % of Ta2O5, 5-15 wt % of Gd2O3, 0-2 wt % of TiO2, 1-10 wt % of Y2O3, 1-12 wt % of WO3, 0-3 wt % of Li2O and 0-1 wt % of Sb2O3. The optical glass provided in the invention features density less than 5.0 g/cm3, refractive index between 1.80 and 1.85, Abbe number between 40 and 45, transition temperature lower than 600° C., wavelength λ80 corresponding to the transmissivity of 80% below 415 nm, and upper limit of devitrification temperature below 1110° C., and is applicable to high-precision molding. |
| 主权项 |
1. An optical glass, comprising SiO2, B2O3, La2O3, ZrO2, ZnO, Ta2O5, Gd2O3, Y2O3 and WO3, with density less than 5.0 g/cm3, refractive index between 1.80 and 1.85, Abbe number between 40 and 45, transition temperature lower than 600° C., wavelength λ80 corresponding to the transmissivity of 80% below 415 nm, and upper limit of devitrification temperature below 1110° C. |
