Abstract: The invention provides a near-infrared absorption glass, a near-infrared absorption element and a near-infrared absorption filter each with good chemical stability and transmissivity property in the visible range. When such glass is 1 mm thick, the transmissivity of such glass is more than 80% at 400 nm, and more than 85% at 500 nm. The near-infrared absorption glass comprises cations such as P5+, Al3+, Li+, R2+ and Cu2+ as well as anions such as O2? and F?, wherein the R2+ refers to Mg2+, Ca2, Sr2+ and Ba2+, and wherein the content of the said Li+ is 1-15%. Furthermore, the water resistant stability DW of the said near-infrared absorption glass is Class 1 and the acid resistant stability DA is above Class 4.

Abstract: 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.