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Title:
光学ガラス
Document Type and Number:
Japanese Patent JP4895512
Kind Code:
B2
Abstract:
An optical glass of the present invention has optical constants of a refractive index (nd) within a range from 1.75 to 1.85 and an Abbe number (νd) within a range from 35 to 45, comprises SiO2 and B2O3 as essential components and one or more components selected from the group consisting of ZrO2, Nb2O5, Ta2O5 and WO3, has a glass transition temperature (Tg) of 580° C. or below and has weathering resistance (surface method) of Class 1 or Class 2.

Inventors:
上原進
Application Number:
JP2005054239A
Publication Date:
March 14, 2012
Filing Date:
February 28, 2005
Export Citation:
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Assignee:
株式会社オハラ
International Classes:
C03C3/068; G02B1/00
Domestic Patent References:
JP2002362938A
JP6305769A
JP2002012443A
Foreign References:
US20030040422
Attorney, Agent or Firm:
特許業務法人高橋・林アンドパートナーズ
坂本 徹
原田 卓治



 
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