Multichroic glasses with praseodymium and neodymium

A glass, comprising:

• Pr2O3;
• and
• Nd2O3,
• wherein (Pr2O3+Nd2O3) is greater than 0.2 mole % and the ratio of Nd2O3 to Pr2O3 is greater than 1 and less than 1.9, and
• further wherein CoO, if present, is less than 0.01 mole % and Fe2O3, if present, is less than 0.004 mole %, and
• one or more chromophores selected from the group consisting of V2O5, Cr2O3, MnO, Mn2O3, Fe2O3, CoO, CO3O4, CuO, NiO, Nb2O5, CeO2, Ho2O3 and Er2O3,
• wherein the sum of V2O5, Cr2O3, MnO, Mn2O3, Fe2O3, CoO, CO3O4, CuO, NiO, Nb2O5, CeO2, Ho2O3 and Er2O3 chromophores is less than 0.1 mole %.

A glass, comprising:

• Pr2O3 ranging from 0.7 to 3.0 mole %, and
• Nd2O3 ranging from 1.0 to 4 mole %,
• wherein the ratio of Nd2O3 to Pr2O3 is greater 1.1 and less than 1.5, and
• further wherein the sum of V2O5, Cr2O3, MnO, Mn2O3, Fe2O3, CoO, CO3O4, CuO, NiO, Nb2O5, CeO2, Ho2O3 and Er2O3 chromophores, if any of the chromophores are present, is less than 0.1 mole %.

A glass, comprising:

• Pr2O3;
• and
• Nd2O3,
• wherein (Pr2O3+Nd2O3) is greater than 0.2 mole % and the ratio of Nd2O3 to Pr2O3 is greater than 0.5 and less than 3, and
• further wherein the sum of V2O5, Cr2O3, MnO, Mn2O3, Fe2O3, CoO, CO3O4, CuO, NiO, Nb2O5, CeO2, Ho2O3 and Er2O3 chromophores, if any of the chromophores are present, is less than 0.1 mole %, and
• one or more fluorescent ions selected from the group consisting of oxides of Yb, Cu, Sn, Mn, Ag, Sb, Ce, Sm, Eu, Tb, Dy, Tm, and combinations thereof,
• wherein a total concentration of fluorescent ions is from greater than or equal to about 0.01 mole % to less than or equal to about 5.0 mole %.

A glass, comprising:

• SiO2 at greater than 70 mole %;
• Pr2O3 ranging from 0.7 to 3.0 mole %;
• and
• Nd2O3 ranging from 1.0 to 4 mole %,
• wherein the ratio of Nd2O3 to Pr2O3 is greater than 1.1 and less than 1.5, and
• further wherein the sum of Fe2O3, CeO2, and TiO2, if any are present, is less than 1 mole %.