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    • 1. 发明公开
    • Optical glass
    • Optisches Glas
    • EP1657225A1
    • 2006-05-17
    • EP05024312.0
    • 2005-11-08
    • KABUSHIKI KAISHA OHARA
    • Uehara, Susuma
    • C03C3/068
    • C03C3/068
    • An optical glass has a low glass transition temperature (Tg) and optical constants in which a refractive index (n d ) is in the range of from 1.70 to less than 1.74 and an Abbe number (v d ) is between 40 and 45 (excluding 40 and 45), has a content of SiO 2 is 17% by mass or less, a glass transition temperature (Tg) is 540°C or less, and a weathering resistance
      (surface-method) in Class 1 or 2, and has excellent chemical durability, particularly weathering resistance
      (surface-method) and is appropriate for precision mold press forming.
    • 光学玻璃具有低的玻璃化转变温度(Tg)和光学常数,其中折射率(nd)在1.70至小于1.74的范围内,阿贝数(vd)为40至45(不包括40和 45),SiO 2的含量为17质量%以下,玻璃化转变温度(Tg)为540℃以下,耐候性(表面法)为1级以上,2级以下,具有优异的化学性 耐久性,特别耐候性(表面法),适用于精密模压成型。