Patent ID: 8124551
Filing Date: 2012-02-28
Classification: B82Y,C03C,G02B

Abstract:
1. A glass member for optical parts, said glass member having a heterogeneous phase region therein that is distinguishable by a different refractive index, the glass member containing: 25% to 75% of SiO 1% to 50% of Rn 5% to 50% of TiO where Rn 2 O is one or more selected from Li 2 O, Na 2 O, K 2 O, Rb 2 O and Cs 2 O, and RO is one or more selected from MgO, SrO, CaO, BaO and ZnO, wherein absolute value |Δn| of refractive index difference Δn of visual light is no less than 0.005 between base glass and said heterogeneous phase region in said glass member for optical parts, wherein said heterogeneous phase is not a cavity.