Patent ID: 7531475
Filing Date: 2009-05-12
Classification: C03C,H01S

Abstract:
1. The glass composition consisting of the following components, indicated by mol %: 55 to 80 SiO 5 to 25 Al 0.01 to 5 bismuth oxide in terms of Bi 0 to 15 Li 0 to 5 Na 0 to 5 K 0 to 40 MgO; 0 to 30 CaO; 0 to 5 SrO; 0 to 5 BaO; 0 to 25 ZnO; 0 to 10 TiO 0 to 5 ZrO 0 to 10 B 0 to 5 of at least one selected from the group consisting of Y 0 to 1 of at least one selected from the group consisting of As wherein the total of MgO+CaO+SrO+BaO+ZnO is in a range of 0.1 to 40 mol %, and wherein the glass composition emits fluorescence in an infrared wavelength region through irradiation of excitation light, with bismuth contained in the bismuth oxide functioning as a fluorescent source.