Optical glass

Details Optical glass Optical glass

Filed on

2009-03-13

Date issued

2011-10-18

Examiner

Group, Karl (Department: 1731)

Patent Class

Compositions: ceramic

SubClass

Ceramic compositions

SubSubClass

Glass compositions, compositions containing glass other than...

Other Related Categories

C501S079000, C501S064000, C501S066000

Type

Reexamination Certificate

Status

active

Patent number

08039411

Description

ABSTRACT:
The present invention has an object to provide an optical glass which has middle refractive index and low dispersibility, a low yield point (Ts) and a liquidus temperature (L.T.) and excellent weather resistance, and is suitable for mold press molding. The present invention relates to an optical glass comprising, in mass % on oxide basis, SiO2: 20 to 40%, B2O3: 10 to 30%, SrO: 10 to 30%, Al2O3: 5.5 to 15%, La2O3: 0.5 to 11%, Li2O: 3 to 12%, CaO: 0 to 10%, BaO: 0 to 9.5%, and ZnO: 0 to 10%.

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Office Action issued Dec. 16, 2010, in China Patent Application No. 200780034054.8 (with English translation).

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