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US 2026/0257961 A1Published application
Optical glass, optical element, optical system, cemented lens, interchangeable lens for camera, objective lens for microscope, and optical device
AssigneeNikon Corporation
InventorTetsuya KOIDE
Life of this patent
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Abstract
An optical glass comprising: by mass %, 20% or more and 50% or less of a content rate of P2O5; 12.66% or more and 35% or less of a content rate of TiO2; 0% or more and 20% or less of a content rate of Nb2O5; and 5% or more and 30% or less of a content rate of Bi2O3, wherein a ratio of a content rate of TiO2 to a content rate of P2O5 (TiO2/P2O5) is 0.30 or more and 0.75 or less.
Claims27
An optical glass comprising:
- by mass %,
- 20% or more and 50% or less of a content rate of P2O5;
- 10% or more and 35% or less of a content rate of TiO2;
- 0% or more and 15.01% or less of a content rate of Nb2O5;
- and
- 5% or more and 30% or less of a content rate of Bi2O3, wherein
- a ratio of a content rate of TiO2 to a total content rate of P2O5, B2O3, and Al2O3 (TiO2/(P2O5+B2O3+Al2O3)) is 0.33 or more and 0.75 or less.
4 more elements
Dependencies are inferred from the claim text.