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Optical glass, precision press-molding preform, process for producing the preform, optical element and process for producing the element
Optical glass, precision press-molding preform, process for producing the preform, optical element and process for producing the element
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机译:光学玻璃,精密压制成型预型件,预型件的制造方法,光学元件和该元件的制造方法
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摘要
An optical glass having high refractivity and a low sag temperature and having a low-temperature softening property that enables precision press-molding is provided, and the optical glass contains, by mol %, 5 to 50% of B2O3, 3 to 50% of SiO2, 5 to 40% of TiO2, 1 to 40% of ZnO, 5 to 20% of La2O3, 0 to 10% of Gd2O3, 0 to 15% of Nb2O5, 0 to 10% of ZrO2, 0 to 5% of Ta2O5, 0 to 10% of Bi2O3, 0 to 10% of MgO, 0 to 8% of CaO, 0 to 10% of SrO, 0 to 10% of BaO, provided that the total content of MgO, CaO, SrO and BaO is 15% or less, 0 to 20% of Li2O, and 0 to 5% of Na2O, optionally containing Sb2O3 as a refining agent, and having a refractive index (nd) of 1.8 or more and an Abbe's number (vd) of 35 or less.
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机译:提供了一种具有高折射率和低流挂温度并且具有能够实现精确压模的低温软化性能的光学玻璃,并且该光学玻璃以摩尔%计包含5至50%的B 2 Sub> O 3 Sub>,SiO 2 Sub>的3%至50%,TiO 2 Sub>的5%至40%,ZnO的1%至40%,5到La 2 Sub> O 3 Sub>的20%,Gd 2 Sub> O 3 Sub>的0%到10% Nb 2 Sub> O 5 Sub>的百分比,ZrO 2 Sub>的0至10%,Ta 2 Sub>的0至5% O 5 Sub>,Bi 2 Sub> O 3 Sub>的0至10%,MgO的0至10%,CaO的0至8%,0至如果MgO,CaO,SrO和BaO的总含量不超过15%,Li 2 Sub> O的0%至20%,Li 2 Sub> O的0至20%,则SrO的10%,BaO的0%至10%。 5%的Na 2 Sub> O,可选地包含Sb 2 Sub> O 3 Sub>作为精制剂,并且折射率(nd)为1.8或大于或等于35的阿贝数(vd)。
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