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Optical glass 发明申请

2023-12-05 3930 1533K 0

专利信息

申请日期 2025-07-28 申请号 WOJP12068717
公开(公告)号 WO2013018586A1 公开(公告)日 2013-02-07
公开国别 WO 申请人省市代码 全国
申请人 OHARA INC; TANAKA Taisuke; OKANO Hiroshi; TOGASHI Ryo; YAGI Toshitaka
简介 Provided is optical glass which has low glass transition temperature (Tg) and specific optical constants that are a refractive index (nd) of 1.60-1.80 and an Abbe number (νd) within the range of 30-60, while containing less rare earth elements. The optical glass has a refractive index (nd) within the range of 1.60-1.80, an Abbe number (νd) within the range of 30-60 and a glass transition temperature (Tg) of 600˚C or less, while containing, in mass% based on oxides, 20% or less of Ln2O3 (wherein Ln represents one or more elements selected from among La, Y, Yb and Gd), Bi2O3, Ta2O5, GeO2 and WO3 in total and 20% or less of Nb2O5. Preferably, the optical glass additionally contains, in mass% based on oxides, 10-50% of SiO2, 30% or less of B2O3, more than 0% but 20% or less of TiO2 and 10-60% (inclusive) of RO (wherein R represents one or more elements selected from among Mg, Ca, Zn, Sr and Ba).


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