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    • 8. 发明授权
    • Optical glass, glass material for press molding, and optical element
    • 光学玻璃,用于压制成型的玻璃材料和光学元件
    • US09416047B2
    • 2016-08-16
    • US14758346
    • 2013-12-26
    • HOYA CORPORATION
    • Kosuke Yamaguchi
    • C03C3/064C03C3/14C03B11/00C03C3/068G02B1/00C03C3/066
    • C03C3/064C03B11/00C03B2215/46C03C3/066C03C3/068C03C3/14G02B1/00
    • Provided are an optical glass with a high refractive index which has excellent devitrification resistance both in a molten state and during reheating, and a glass material for press molding and an optical element which are comprised of the optical glass. This optical glass includes, in mass %, 15-37% of B2O3 and SiO2 in total, 15-45% of TiO2, Nb2O5 and ZrO2 in total, and 12-40% of BaO, SrO, CaO, MgO, K2O, Na2O and Li2O in total, has a mass ratio (B2O3/(B2O3+SiO2)) of 0.15 or more, a mass ratio (TiO2/(TiO2+Nb2O5+ZrO2)) of 0.01 to 0.8, a mass ratio ((BaO+SrO+CaO)/(BaO+SrO+CaO+MgO+K2O+Na2O+Li2O)) of 0.4 or more, and a mass ratio ((K2O+Na2O+Li2O)/(BaO+SrO+CaO+MgO+K2O+Na2O+Li2O)) of 0.1 or more, substantially does not include PbO, and has a refractive index nd of 1.78-1.84, and an Abbe's number νd of 26-32.
    • 提供一种具有高折射率的光学玻璃,其在熔融状态和再加热期间都具有优异的耐失透性,以及由光学玻璃构成的用于压制成型的玻璃材料和光学元件。 该光学玻璃以质量%计,总共含有15-37%的B 2 O 3和SiO 2,总共含有15-45%的TiO 2,Nb 2 O 5和ZrO 2以及12-40%的BaO,SrO,CaO,MgO,K 2 O,Na 2 O 和Li 2 O,质量比(B 2 O 3 /(B 2 O 3 + SiO 2))为0.15以上,质量比(TiO 2 /(TiO 2 + Nb 2 O 5 + ZrO 2))为0.01〜0.8,质量比((BaO + SrO +(BaO + SrO + CaO + MgO + K2O + Na2O)的质量比((K2O + Na2O + Li2O)/(BaO + SrO + CaO + MgO + K2O + Na2O + Li2O))为0.4以上 + Li 2 O))为0.1以上,基本上不包含PbO,折射率nd为1.78〜1.84,阿贝数vd为26-32。