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OPTICAL GLASS

  • US 20180222786A1
  • Filed: 08/10/2016
  • Published: 08/09/2018
  • Est. Priority Date: 08/14/2015
  • Status: Active Grant
First Claim
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1. An optical glass, comprising by weight percentage:

  • B2O3;

    1-30%;

    SiO2;

    0-20%;

    La2O3;

    25-55%;

    Gd2O3;

    5-40%;

    Y2O3;

    0-25%;

    Yb2O3;

    0-10%;

    Ta2O5;

    0-10%;

    Nb2O5;

    1-30%;

    TiO2;

    0-10%;

    TiO2/Nb2O5;

    less than 0.3;

    ZrO2;

    0.5-20%;

    WO3;

    0-10%;

    ZnO;

    0-15%;

    (ZnO+Y2O3)/La2O3;

    less than 0.5;

    R2O;

    0-10%, in which R2O is one or more of Li2O, Na2O or K2O;

    RO;

    0-10%, in which, RO is one or more of BaO, SrO, MgO or CaO;

    Al2O3;

    0-10%;

    GeO2;

    0-10%;

    Bi2O3;

    0-10%;

    the glass contains no PbO;

    the glass refractive index is more than 1.85, and the Abbe number is 35-45.

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