Patent ID: 6806216
Filing Date: 2004-10-19
Classification: C03C,Y10S

Abstract:
A zinc-containing optical glass with a refractive index (nd) being in the range of from about 1.60 to about 1.63 and an Abbe number (vd) being in the range of from about 43 to about 47, said zinc-containing optical glass comprising, on an oxide basis, the composition of:PercentageMaterialby weightSiO240-47â€‚ZnO32-41â€‚PbO5-14sum of ZnO + PbO40-48â€‚Li2O0-<3Na2O0-12K2O0-10sum of Li2O + Na2O + K2O&gE;2F0-3â€‚MgO0-6â€‚CaO0-<5SrO0-6â€‚BaOâ€‚â€‰0-<0.9B2O30-<1Al2O3â€‚â€‰0-<1.5ZrO2â€‰0-<2.