Patent ID: 7855158
Filing Date: 2010-12-21
Classification: C03C

Abstract:
1. An optical glass comprising, denoted as molar percentages: 0 to 20 percent SiO 5 to 40 percent B SiO 0.5 to 10 percent Li 12 to 36 percent ZnO, where 3×Li 5 to 30 percent La 0 to 20 percent Gd 0 to 10 percent Y La La (where SIGMA(Σ)RE 0.5 to 10 percent ZrO 1 to 15 percent Ta 1 to 20 percent WO Ta 0 to 8 percent Nb 0 to 8 percent TiO no Te; and having a refractive index nd of not less than 1.87 and an Abbé number nu(v)d of not less than 35 but less then 40.