NEAR-INFRARED RAY CUT FILTER GLASS

摘要

Disclosed is a near-infrared ray cut filter glass which can have a high visible light transmittance for a long period, also can have a reduced near-infrared ray transmittance, and can be produced at a low cost. The near-infrared ray cut filter glass is characterized by containing, in mass% in terms of oxide content, 65 to 85% of P2O5, 1 to 20% of Al2O3, 0 to 1.5% of B2O3, 0 to 2% of Li2O, 0.5 to 15% of Na2O, 0 to 20% of K2O, 1 to 20% of Li2O+Na2O+K2O, 0 to 2% of MgO, 0 to 2% of CaO, 0 to 5% of SrO, 0 to 10% of BaO, 0.5 to 10% of MgO+CaO+SrO+BaO, 0.5 to 20% of CuO, and 0 to 5% of Sb2O3, and having a P2O5/(Al2O3+B2O3) ratio of 5 to 15 and a (Na2O+K2O)/(Li2O+MgO+CaO+SrO+BaO) ratio of 1.5 to 15.