GLASS, METHOD OF MANUFACTURING GLASS AND OPTICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide glass excellent in the view of environmental protection, having high refractive index and capable of transmitting luminous flux of short wave length with high transmittance, a method of manufacturing the glass and an optical device. SOLUTION: Discoloring phenomenon in a heat treatment is suppressed and the transmittance in the irradiation of a 3 mm thick glass sample with luminous flux of 400 nm wavelength is maintained at≥70% by adding Sb, Nb, Sn, Ta and Bi to a tellurite glass. COPYRIGHT: (C)2004,JPO