Patent ID: 7833920
Filing Date: 2010-11-16
Classification: C03C,G11B

Abstract:
1. An optical glass which consists of, in terms of % by mass on the basis of oxides, 37-45% of SiO 12-20% of B 2-7% of Li 0.1-10% of ZnO, 2-15% of Al 25-30.7% of BaO, 0-5% of K 0-10% of Na 0-20% of Gd optionally at least one selected from the group consisting of 0-10% of MgO, 0-5% of CaO, and 0-5% of SrO, such that BaO+MgO+CaO+SrO is 25-40%, and optionally at least one selected from the group consisting of 0.01-1% of Sb wherein SiO Li the optical glass has an Abbe number v