Optical colored glass, its use and sharp skirt optical filter

摘要

Optical colored glass comprises (in weight %) 30-75 SiO2, 5-35 K2O, more than 4-17 B2O3, 5-37 ZnO, 0.01-10 F, and MIMIIIY2II (where, MI = Cu<+>, Ag<+>; MII = In<3+>, Ga<3+>, Al<3+>; and YII = S<2->, Se<2-> and Te<2->). Preferred Features: The Optical colored glass comprises (in weight %) 30-75 SiO2, 5-35 K2O, 0-5 TiO2, more than 4-17 B2O3, 5-30 ZnO, 0.01-10 F, and 0.1-3 MIMIIIY2II (where, MI = Cu<+>, Ag<+>; MII = In<3+>, Ga<3+>, Al<3+>; and YII = S<2->, Se<2-> and Te<2->). The glass additionally contains (in wt.%) 0-20 Na2O, not more than 35 Na2O + K2O, 0-20 MgO, 0-20 CaO, 0-20 CaO + MgO, 0-10 Al2O3, 0 to less than 10 SrO, 0 to less than 10 BaO, 0-5 La2O3, 0-5 Nb2O5, 0-5 Ta2O5, 0-5 CeO2, 0-5 ZrO2, 0-10 P2O5, and the usual amounts of refining agent.