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US07700507B2 Optical glass, preform for precision press-molding, process for the production of the preform, optical element, and process for the production of the element 失效
光学玻璃，用于精密加压成型的预成型件，用于生产预制件的工艺，光学元件以及用于制造元件的工艺

  • 专利标题： Optical glass, preform for precision press-molding, process for the production of the preform, optical element, and process for the production of the element
  • 专利标题（中）： 光学玻璃，用于精密加压成型的预成型件，用于生产预制件的工艺，光学元件以及用于制造元件的工艺
  • 申请号： US11225886
    申请日： 2005-09-14
  • 公开(公告)号： US07700507B2
    公开(公告)日： 2010-04-20
  • 发明人: Yoshiko Kasuga , Xuelu Zou
  • 申请人： Yoshiko Kasuga , Xuelu Zou
  • 申请人地址： JP Tokyo
  • 专利权人： Hoya Corporation
  • 当前专利权人： Hoya Corporation
  • 当前专利权人地址： JP Tokyo
  • 代理机构： Nixon & Vanderhye P.C.
  • 优先权： JP2004-284506 20040929
  • 主分类号： C03C3/066
  • IPC分类号： C03C3/066 ;  C03C3/068 ;  C03C3/095
Optical glass, preform for precision press-molding, process for the production of the preform, optical element, and process for the production of the element
摘要：
An optical glass which has an Abbe's number (νd) of 50 to 59, has the property of not easily reacting with a press mold, a low-temperature softening property, excellent glass stability and high refractivity, and is suitable for precision press-molding. The optical glass comprising B2O3 and SiO2 as essential components and having a B2O3 and SiO2 total content (B2O3+SiO2) of 45 to 70 by mol % and an SiO2 content/B2O3 content molar ratio (SiO2/B2O3) of from 0.1 to 0.5, the optical glass further comprising, by mol %, 5 to 15% of La2O3, 0.1 to 8% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 8% or more, 0 to 10% of Y2O3, 3 to 18% of Li2O, provided that the molar ratio of the content of Li2O to the total content of B2O3 and SiO2 [Li2O/(B2O3+SiO2)] is over 0 but not more than 0.2, 0.1 to 15% of ZnO, 2 to 20% of CaO, 0 to 5% of BaO, provided that the content of BaO is smaller than the content of ZnO, 0 to 5% of SrO, 0 to 5% of MgO, provided that the molar ratio of the total content of MgO, CaO, SrO and BaO to the total content of B2O3 and SiO2 [(MgO+CaO+SrO+BaO)/(B2O3+SiO2) is from 0.1 to 0.4, and 0 to 5% of ZrO2, and having a refractive index (nd) and an Abbe's number (νd) which satisfy the equation (1), νd≧308.5−150×nd (in which 50≦νd≦59)  (1).
摘要（中）：

阿贝数（＆ngr; d）为50〜59的光学玻璃具有不易与压模成型反应的特性，低温软化性，玻璃稳定性优异，折射率高，适用于精密压制 模特儿 包含B 2 O 3和SiO 2作为必要成分并且B 2 O 3和SiO 2的总含量（B 2 O 3 + SiO 2）为45〜70摩尔％，SiO 2含量/ B 2 O 3含量摩尔比（SiO 2 / B 2 O 3）为0.1〜0.5的光学玻璃， 光学玻璃还含有5〜15％的La 2 O 3，0.1〜8％的Gd 2 O 3，条件是La 2 O 3和Gd 2 O 3的总含量为8％以上，0〜10％的Y 2 O 3，3〜18％ Li 2 O的含量与B 2 O 3和SiO 2 [Li 2 O /（B 2 O 3 + SiO 2）]的总含量的摩尔比为0以上且0.2以下，ZnO为0.1〜15％，2〜20质量％ 的CaO，0〜5％的BaO，条件是BaO的含量小于ZnO的含量，0〜5％的SrO，0〜5％的MgO，条件是MgO的总含量， CaO，SrO和BaO相对于B2O3和SiO2 [（MgO + CaO + SrO + BaO）/（B2O3 + SiO2）的总含量为0.1〜0.4，0〜5％的ZrO 2，折射率（nd ）和满足式（1）的阿贝数（＆ngr; d），＆ngr;d≥308.5 -150×nd（其中50＆nlE;＆ngr; d＆nlE; 59）（1）。

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