PREFERABLY PB-FREE AND AS-FREE OPTICAL GLASSES WITH TG= 500C

摘要

Optical glasses (preferably lead-free and arsenic-free) having a refractive index of 1.48 to 1.56, an Abbe number of 64 to 72, a low transformation temperature (Tg & 500{C) and good ion exchange properties, as well as good chemical resistance and crystallization stability, have the following composition (in % by weight): TAB CO=4 CS="A S" ROWTSBSiO2CEL AL=L53CEL AL=L-CEL AL=L58 ROWTSBB2O3CEL AL=L11CEL AL=L-CEL AL=L15 ROWTSBAl2O3CEL AL=L16CEL AL=L-CEL AL=L20 ROWTSBNa2OCEL AL=L0CEL AL=L-CEL AL=L13 ROWTSBK2OCEL AL=L0CEL AL=L-CEL AL=L13 ROWTSB S M2OCEL AL=L9CEL AL=L-CEL AL=L13 ROWTSBFCEL AL=L0.5CEL AL=L-CEL AL=L4 /TAB The glass may additionally contain standard refining agents Sb2O3, SnO, Na cl and/or SO42-optical glasses according to the invention maybe used in the areas of imaging, projection, telecommunications, optical communication and/or laser technology.