Optical glass and optical element

摘要

The invention discloses an optical glass and an optical element. The optical glass comprises 0.1 wt % -8 wt % of SiO2, 20 wt % -32 wt % of B2O3, 20 wt % -35 wt % of La2O3, 15 wt % -30 wt % of Gd2O3, 1-6 wt % of Ta2O5, 1 wt % -15 wt % of ZnO, and 0.1 wt % -2 wt % of Li2O. The optical glass claimed in the invention has a refractive index of 1.75-1.8, an Abbe number of 45-52, a transformation temperature of less than 610° C., and a wavelength of less than 390 nm at 80% transmittance. Thus the claimed optical glass meets the requirements for a modern imaging device.

主权项

1. An optical glass comprising
0.1 wt % to less than 4 wt % of SiO2, 20 wt % -32 wt % of B2O3, 20 wt % -35 wt % of La2O3, 15 wt % -30 wt % of Gd2O3, 1 wt % -6 wt % of Ta2O5, 1 wt % -15 wt % of ZnO, and 0.1 wt % ˜2 wt % of Li2O.