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US 2012/0238436 A1Published application
Optical Glass and Optical Element
AssigneeKonica Minolta Advanced Layers, Inc.
InventorYoshihito Taguchi
Life of this patent
Estimating the term…
Abstract
Provided with the following glass components: 8 to 19.5% B2O3, 4.5 to 9% SiO2, 0 to 10% GeO2, 7 to 12.5% BaO, 0 to 14% MgO, 0 to 0.4% Li2O, 15 to 34% La2O3, 3.5 to 10% Y2O3, 8 to 13.5% TiO2, 0 to 7% ZrO2, 0 to 11% Nb2O5, and 1 to 9% WO3 by weight, wherein B2O3/SiO2 is at least 1.0, La2O3+Y2O3+ZrO2+Nb2O5+WO3 is no more than 54%, and B2O3+SiO2+GeO2+BaO+MgO+Li2O+La2O3+Y2O3+TiO2+ZrO2+Nb2O5+WO3 is at least 98%.
Claims22
1-4. (canceled)
5% to 10% of Y2O3;
- 8% to 13.5% of TiO2;
- 0% to 7% of ZrO2;
- 0% to 11% of Nb2O5;
- and
- 1% to 9% of WO3, wherein
- B2O3/SiO2 equals 1.0 or more,
- La2O3+Y2O3+ZrO2+Nb2O5+WO3 equals 54% or less, and
- B2O3+SiO2+GeO2+BaO+MgO+Li2O+La2O3+Y2O3+TiO2+ZrO2+Nb2O5+WO3 equals 98% or more.
5 more elements
An optical glass comprising, by weight:
- 8% to 19.5% of B2O3;
- 4.5% to 9% of SiO2;
- 0% to 10% of GeO2;
- 7% to 12.5% of BaO;
- 0% to 14% of MgO;
- 0% to 0.4% of Li2O;
- 15% to 34% of La2O3;
4 more elements
Dependencies are inferred from the claim text.