An optical glass comprising: by mass%, 20% or more and 55% or less of a content rate of P.sub.2O.sub.5; 10% or more and 40% or less of a content rate of TiO.sub.2; 0% or more and 30% or less of a content rate of Nb.sub.2O.sub.5; 0% or more and 2% or less of a content rate of Al.sub.2O.sub.3; 0% or more and 10% or less of a content rate of B.sub.2O.sub.3; 3% or more and 30% or less of a content rate of BaO; 0% or more and 30% or less of a content rate of Bi.sub.2O.sub.3; 0% or more and 20% or less of a content rate of Ta.sub.2O.sub.5; and 0% or more and 25% or less of a content rate of WO.sub.3, wherein a ratio of a total content rate of Li.sub.2O, Na.sub.2O and K.sub.2O (ΣA.sub.2O; where, A = Li, Na and K) to a content rate of TiO.sub.2 (ΣA.sub.2O/TiO.sub.2) is 0.10 or more and 0.65 or less, and a ratio of a content rate of TiO.sub.2 to a total content rate of P.sub.2O.sub.5, B.sub.2O.sub.3, and Al.sub.2O.sub.3 (TiO.sub.2/(P.sub.2O.sub.5 + B.sub.2O.sub.3 + Al.sub.2O.sub.3) ) is 0.25 or more and 0.85 or less.

An optical glass comprising: by mass%, 20% or more and 55% or less of a content rate of P.sub.2O.sub.5; 10% or more and 40% or less of a content rate of TiO.sub.2; 0% or more and 30% or less of a content rate of Nb.sub.2O.sub.5; 0% or more and 2% or less of a content rate of Al.sub.2O.sub.3; 0% or more and 10% or less of a content rate of B.sub.2O.sub.3; 3% or more and 30% or less of a content rate of BaO; 0% or more and 30% or less of a content rate of Bi.sub.2O.sub.3; 0% or more and 20% or less of a content rate of Ta.sub.2O.sub.5; and 0% or more and 25% or less of a content rate of WO.sub.3, wherein a ratio of a total content rate of Li.sub.2O, Na.sub.2O and K.sub.2O (ΣA.sub.2O; where, A = Li, Na and K) to a content rate of TiO.sub.2 (ΣA.sub.2O/TiO.sub.2) is 0.10 or more and 0.65 or less, and a ratio of a content rate of TiO.sub.2 to a total content rate of P.sub.2O.sub.5, B.sub.2O.sub.3, and Al.sub.2O.sub.3 (TiO.sub.2/(P.sub.2O.sub.5 + B.sub.2O.sub.3 + Al.sub.2O.sub.3) ) is 0.25 or more and 0.85 or less.

A filter glass contains >1.1 to 6.0 wt % Li.sub.2O and at least one further component selected from Na.sub.2O and K.sub.2O, and includes the following composition (in wt % based on oxide): 55.0-75.0 P.sub.2O.sub.5, 4.1-8.0 Al.sub.2O.sub.3, 8.0-18.0 CuO, 0-<0.8 V.sub.2O.sub.5, ≤2.0 SiO.sub.2, ≤2.0 F, 0-11.0 Total R′O (R′=Mg, Ca, Sr, Ba, Zn), and 3.0-17.0 Total R.sub.2O (R=Li, Na, K).

A filter glass contains >1.1 to 6.0 wt % Li.sub.2O and at least one further component selected from Na.sub.2O and K.sub.2O, and includes the following composition (in wt % based on oxide): 55.0-75.0 P.sub.2O.sub.5, 4.1-8.0 Al.sub.2O.sub.3, 8.0-18.0 CuO, 0-<0.8 V.sub.2O.sub.5, ≤2.0 SiO.sub.2, ≤2.0 F, 0-11.0 Total R′O (R′=Mg, Ca, Sr, Ba, Zn), and 3.0-17.0 Total R.sub.2O (R=Li, Na, K).

A glass composition, a macrocomposite, and methods of forming the macrocomposite including dispersing or immersing a metal in a glass. Preferably, the macrocomposite does not include an organic resin, an adhesive, or a polymer.

A glass composition, a macrocomposite, and methods of forming the macrocomposite including dispersing or immersing a metal in a glass. Preferably, the macrocomposite does not include an organic resin, an adhesive, or a polymer.

An optical glass comprising: by mass %, 20% or more and 50% or less of a content rate of P.sub.2O.sub.5; 12.66% or more and 35% or less of a content rate of TiO.sub.2; 0% or more and 20% or less of a content rate of Nb.sub.2O.sub.5; and 5% or more and 30% or less of a content rate of Bi.sub.2O.sub.3, wherein a ratio of a content rate of TiO.sub.2 to a content rate of P.sub.2O.sub.5 (TiO.sub.2/P.sub.2O.sub.5) is 0.30 or more and 0.75 or less.

An optical glass comprising: by mass %, 20% or more and 50% or less of a content rate of P.sub.2O.sub.5; 12.66% or more and 35% or less of a content rate of TiO.sub.2; 0% or more and 20% or less of a content rate of Nb.sub.2O.sub.5; and 5% or more and 30% or less of a content rate of Bi.sub.2O.sub.3, wherein a ratio of a content rate of TiO.sub.2 to a content rate of P.sub.2O.sub.5 (TiO.sub.2/P.sub.2O.sub.5) is 0.30 or more and 0.75 or less.

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 P.sub.2O.sub.5 is 5.0 mass % or more, an amount of Bi.sub.2O.sub.3 is 20.0 mass % or less, an amount of TiO.sub.2 is 0.1 mass % or more, a mass ratio [TiO.sub.2/(Li.sub.2O+Na.sub.2O+K.sub.2O)] between the amount of TiO.sub.2, and a total amount of Li.sub.2O, Na.sub.2O, and K.sub.2O [Li.sub.2O+Na.sub.2O+K.sub.2O] is 2.5 to 10.0, a mass ratio [TiO.sub.2/(MgO+CaO+ZnO+SrO+BaO)] between the amount of TiO.sub.2 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 [(Li.sub.2O+Na.sub.2O+MgO+CaO+ZnO+SrO)/(K.sub.2O+BaO)] between a total amount of Li.sub.2O, Na.sub.2O, MgO, CaO, ZnO, and SrO [Li.sub.2O+Na.sub.2O+MgO+CaO+ZnO+SrO] and a total amount of K.sub.2O and BaO [K.sub.2O+BaO] is 0.8 or less.

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 P.sub.2O.sub.5 is 5.0 mass % or more, an amount of Bi.sub.2O.sub.3 is 20.0 mass % or less, an amount of TiO.sub.2 is 0.1 mass % or more, a mass ratio [TiO.sub.2/(Li.sub.2O+Na.sub.2O+K.sub.2O)] between the amount of TiO.sub.2, and a total amount of Li.sub.2O, Na.sub.2O, and K.sub.2O [Li.sub.2O+Na.sub.2O+K.sub.2O] is 2.5 to 10.0, a mass ratio [TiO.sub.2/(MgO+CaO+ZnO+SrO+BaO)] between the amount of TiO.sub.2 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 [(Li.sub.2O+Na.sub.2O+MgO+CaO+ZnO+SrO)/(K.sub.2O+BaO)] between a total amount of Li.sub.2O, Na.sub.2O, MgO, CaO, ZnO, and SrO [Li.sub.2O+Na.sub.2O+MgO+CaO+ZnO+SrO] and a total amount of K.sub.2O and BaO [K.sub.2O+BaO] is 0.8 or less.