Patent ID: 7515332
Filing Date: 2009-04-07
Classification: C03C,H01S

Abstract:
1. A glass composition consisting of the following components, indicated by mol %: 30 to 80 SiO 0 to 40 Li 0 to 30 Na 0 to 20 K 0 to 40 MgO; 0 to 40 CaO; 0 to 30 SrO; 0 to 20 BaO; 0 to 40 Al 0 to 40 ZnO; 0 to 30 TiO 0 to 30 ZrO 0 to 30 Y 0 to 30 La 0 to 20 B 0.01 to 2 bismuth in terms of Bi 0.01 to 12 of at least one cation selected from the group consisting of Dy wherein the total of Li the glass composition emits fluorescence in an infrared wavelength region, with the bismuth functioning as a fluorescent source through irradiation of excitation light, and the total content by percentage of impurities is lower than 1 mol %.