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公开(公告)号:US20130270493A1
公开(公告)日:2013-10-17
申请号:US13909122
申请日:2013-06-04
Applicant: HOYA CORPORATION
Inventor: Xuelu ZOU , Yoshio NOJIMA , Hiroki TAKAZAWA
CPC classification number: C03C3/097 , C03B11/00 , C03B11/122 , C03C3/062 , C03C3/064 , C03C3/066 , G02B1/00
Abstract: An optical glass comprising, by mass %, 12 to 40% of SiO2, 15% or more but less than 42% of Nb2O5, 2% or more but less than 18% of TiO2, (provided that Nb2O5/TiO2 is over 0.6), 0.1 to 20% of Li2O, 0.1 to 15% of Na2O, and 0.1 to 25% of K2O, and having an Abbe's number νd of 20 to 30, a ΔPg,F of 0.016 or less and a liquidus temperature of 1,200° C. or lower.
Abstract translation: 一种光学玻璃,其以质量%计含有SiO 2的12〜40%,Nb 2 O 5的15%以上且42%以下,TiO 2的2%以上且18%以下(条件是Nb 2 O 5 / TiO 2大于0.6) ,0.1〜20%的Li 2 O,0.1〜15%的Na 2 O和0.1〜25%的K 2 O,阿贝数nud为20〜30,ΔPg,F为0.016以下,液相线温度为1200℃ 或更低。