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US 12,679,758 B2Granted
Optical glass, glass preform, optical element and optical instrument
AssigneeCdgm Glass Co., Ltd
InventorBo Kuang
Life of this patent
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Abstract
An optical glass, wherein components thereof are represented by weight percentage, including: 1-15% of SiO2; 5-20% of B2O3; 25-50% of La2O3; 1-12% of ZrO2; 5-20% of TiO2; 6-35% of RO, and the RO is total content of MgO, CaO, SrO, and BaO. Through rational component design, the optical glass has low density while having desired refractive index and Abbe number, which meets the lightweight application of optical instruments.
Claims17
An optical glass, wherein components thereof are represented by weight percentage, comprising:
- 1-15% of SiO2;
- 5-20% of B2O3;
- 25-50% of La2O3;
- 1-12% of ZrO2;
- 5-20% of TiO2;
- 5-20% of BaO, 0-10% of SrO;
- 1.35-12% of CaO, 0-10% of MgO;
- 6-35% of RO, and the RO is a total content of MgO, CaO, SrO, BaO;
- wherein CaO/(SiO2+ZrO2) is 0.02-1.0;
- and
- La2O3/(ZnO+Nb2O5) is 3.5-6.0.
8 more elements
Dependencies are inferred from the claim text.