OPTICAL GLASS PLATE
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United States of America Patent
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Issued Date -
Oct 24, 2024
app pub date -
Aug 2, 2022
filing date -
Aug 2, 2022
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To provide an optical glass plate having refractive index properties higher than those of an optical glass plate in the related art. An optical glass plate contains, in terms of mass %, 0% to 12% of SiO2, 0% to 10% of B2O3, 0% to 9% of BaO, 0% to 5% of ZnO, 2% to 10% of ZrO2, 15% to 45% of La2O3, 0% to 15% of Gd2O3, 0% to 15% of Nb2O5, 0% to 10% of WO3, 15% to 50% of TiO2, and 0.1% to 10% of Y2O3, in which a ratio Y3+/(Gd3++Y3++Yb3+) is 0.2 or more in terms of cation %, a refractive index nd is 2.01 or more, and an Abbe number vd is 35 or less.
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