Abstract: Provided is optical glass in which a refractive index nd is 1.950 or more, an amount of P2O5 is 10.0 to 40.0 mass %, an amount of TiO2 is 5.0 to 40.0 mass %, an amount of Nb2O5 is 20.0 to 60.0 mass %, an amount of Bi2O3 is 20.0 mass % or less, a total amount of Al2O3 and SiO2 [Al2O3+SiO2] is 2.0 mass % or less, a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 5.0 mass % or less, and a total amount of ZnO, SrO, and BaO [ZnO+SrO+BaO] is 0.01 to 12.0 mass %.

Abstract: Provided is optical glass in which an amount of P2O5 is 10.0 to 40.0 mass %, an amount of TiO2 is 5.0 to 40.0 mass %, an amount of Nb2O5 is 20.0 to 60.0 mass %, an amount of K2O is 0.01 mass % or more, a total amount of Li2O, Na2O, K2O, MgO, CaO, ZnO, SrO, and BaO [Li2O+Na2O+K2O+MgO+CaO+ZnO+SrO+BaO] is 20.0 mass % or less, a total amount of TiO2 and Nb2O5[TiO2+Nb2O5] is 55.0 mass % or more, a mass ratio [K2O/(Li2O+Na2O+K2O)] between the amount of K2O, and a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 0.5 or more, a mass ratio [(MgO+CaO+ZnO+SrO+BaO)/(Li2O+Na2O+K2O)] between a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO], and the total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 0.30 to 10.0, a mass ratio [TiO2/K2O] between the amount of TiO2 and the amount of K2O is 3.0 or more, and a mass ratio [(Li2O+Na2O+MgO+CaO+ZnO+SrO)/(K2O+BaO)] between a total amount of Li2O, Na2O, MgO, CaO, ZnO, and SrO [Li2O+Na2O+MgO+CaO+ZnO+SrO], and a total amount of K2O and BaO [K2O+BaO] is 0.

Abstract: Provided is optical glass in which a refractive index nd is 1.900 or more, an Abbe number vd is 25.0 or less, an amount of P2O5 is 5.0 mass % or more, an amount of Bi2O3 is 20.0 mass % or less, an amount of TiO2 is 0.1 mass % or more, a mass ratio [TiO2/(Li2O+Na2O+K2O)] between the amount of TiO2, and a total amount of Li2O, Na2O, and K2O [Li2O+Na2O+K2O] is 2.5 to 10.0, a mass ratio [TiO2/(MgO+CaO+ZnO+SrO+BaO)] between the amount of TiO2 and a total amount of MgO, CaO, ZnO, SrO, and BaO [MgO+CaO+ZnO+SrO+BaO] is 1.25 to 10.0, and a mass ratio [(Li2O+Na2O+MgO+CaO+ZnO+SrO)/(K2O+BaO)] between a total amount of Li2O, Na2O, MgO, CaO, ZnO, and SrO [Li2O+Na2O+MgO+CaO+ZnO+SrO] and a total amount of K2O and BaO [K2O+BaO] is 0.8 or less.