OPTICAL GLASS AND LENS
PROBLEM TO BE SOLVED: To provide optical glass having a high refractive index, which is required for obtaining a lens having a larger numerical aperture. SOLUTION: The optical glass contains, by mol, 25-57% B2O3, 5-25% ZnO, 5-30% La2O3, 1-20% Ga2O3, 1-15% of TiO2+ WO3, 0-15% Li2O, 0-20% GeO2, 0-20%...
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| creator | SUGIMOTO NAOKI MATSUMOTO SHUJI SASAI ATSUSHI |
| description | PROBLEM TO BE SOLVED: To provide optical glass having a high refractive index, which is required for obtaining a lens having a larger numerical aperture. SOLUTION: The optical glass contains, by mol, 25-57% B2O3, 5-25% ZnO, 5-30% La2O3, 1-20% Ga2O3, 1-15% of TiO2+ WO3, 0-15% Li2O, 0-20% GeO2, 0-20% TeO2, 0-10% Ta2O5, 0-20% of ZrO2+ In2O3+ Y2O3+ Gd2O3, and 30-60% of B2O3+ GeO2, or the optical glass has a glass transition point of ≤600°C. Or, the optical glass has a refractive index of ≥1.85 to the light having a wavelength of 405 nm and an Abbe's number of ≥35. A lens is formed from the optical glass. COPYRIGHT: (C)2006,JPO&NCIPI |
| format | Patent |
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SOLUTION: The optical glass contains, by mol, 25-57% B2O3, 5-25% ZnO, 5-30% La2O3, 1-20% Ga2O3, 1-15% of TiO2+ WO3, 0-15% Li2O, 0-20% GeO2, 0-20% TeO2, 0-10% Ta2O5, 0-20% of ZrO2+ In2O3+ Y2O3+ Gd2O3, and 30-60% of B2O3+ GeO2, or the optical glass has a glass transition point of ≤600°C. Or, the optical glass has a refractive index of ≥1.85 to the light having a wavelength of 405 nm and an Abbe's number of ≥35. A lens is formed from the optical glass. 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| subjects | CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS |
| title | OPTICAL GLASS AND LENS |
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