Optical glass and optical components

Abstract

This invention provides an optical glass with reduced Nb content, lower glass transition temperature (Tg), and appropriate liquidus temperature. The provided optical glass contains the following components: SiO2 content of 0.00–15.00% by mass, B2O3 content of 0.00–30.00% by mass, ZnO content of 0.00–25.00% by mass, La2O3 content of 20.00–50.00% by mass, Ta2O5 content of 0.00–1.50% by mass, Li2O content of 0.50–10.00% by mass, Y2O3 content of 0.00–1.90% by mass, and WO3 content of [missing information]. The content is 0.00~10.00% by mass, the ZrO2 content is 0.00~9.00% by mass, the Nb2O5 content is 0.00~14.50% by mass, (Nb2O5+WO3+ZrO2+La2O3) / (ZnO+Li2O+B2O3+SiO2)=1.000~1.250, (Nb2O5+WO3+Ta2O5) / (La2O3+Gd2O3+Y2O3)=0.250~0.400.