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OPTICAL GLASS AND OPTICAL ELEMENT

  • US 20200131072A1
  • Filed: 04/18/2017
  • Published: 04/30/2020
  • Est. Priority Date: 04/05/2017
  • Status: Active Application
First Claim
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1. An optical glass having a composition including, in % by mass:

  • 30% or more and 47% or less of SiO2;

    0% or more and 10% or less of B2O3;

    3% or more and 12% or less of Na2O;

    0% or more and 5% or less of Li2O;

    0% or more and 3.8% or less of CaO;

    28% or more and 43% or less of BaO;

    3% or more and 16% or less of ZnO;

    0% or more and 8% or less of ZrO2; and

    0% or more and 15% or less of La2O3,where Sb2O3 is excluded from the composition,wherein the optical glass does not contain any of PbO, As2O3, and K2O.

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