Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Susumu Uehara0
Koji Shimizu0
Date of Patent
May 5, 2009
0Patent Application Number
108594350
Date Filed
June 2, 2004
0Patent Primary Examiner
Patent abstract
An optical glass having a refractive index (nd) within a range from 1.825 to 1.870, an Abbe number (ν d) within a range from 22 to less than 27, a transformation temperature (Tg) within a range from 530° C. to 585° C. and an mean coefficient of linear thermal expansion (α) within a range from 80×10−7° C.−1 to 103×10−7° C.−1, comprising SiO2, TiO2, Nb2O5 and Li2O and being substantially free of a Pb compound.
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