Patent ID: 6777359
Filing Date: 2004-08-17
Classification: C03C,G02B

Abstract:
A polarizing glass comprising geometrically anisotropic particles dispersed in an oriented manner in at least the surface of a glass base body,wherein the glass base body is denoted by the weight percentages of50-65 percent SiO2, 15-22 percent B2O3, 0-4 percent Al2O3, 2-8 percent ZrO2, 6 percent 2O3+ZrO2<12 percent, 6-16 percent R2O (where R denotes at least one from among Li, Na, and K), 0-3 percent Li2O, 0-9 percent Na2O, 4-16 percent K2O, Li2O+Na2O2O, 0-7 percent BaO and/or SrO3, and 0-3 percent TiO2; comprises per 100 weight percent of essentially the above composition at least 0.15-1.0 percent Ag and at least the chemical equivalent to Ag of Cl and/or Br; and the geometrically anisotropic silver particles are metallic Ag particles, and said glass substantially does not comprise CuO and CeO2.