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US 2022/0064051 A1Published application
Optical glass, optical element composed of optical glass, optical system interchangeable lens, and optical device
AssigneeNikon Corporation
InventorsKohei YOSHIMOTO, Motoi UEDA, Hiroshi YAMAMOTO, Tatsunori KAWASHIMA
Life of this patent
Estimating the term…
Abstract
An optical glass includes, in terms of mol % of cations, a total amount of La3+, Y3+, and Gd3+ components falling within a range of from 5% to 65% and a total amount of Zr4+, Hf4+, and Ta5+ components falling within a range of from 5% to 65%, and a relationship expressed in Expression (1) given below is satisfied. (La3++Y3++Gd3+)×(Zr4++Hf4++Ta5+)≥400 (%)2
Claims33
1-12 (canceled)
An optical glass, comprising:
- in terms of mol % of cations,
- a total amount of La3+, Y3+, and Gd3+ components falling within a range of about 5% to about 65%;
- and
- a total amount of Zr4+, Hf4+, and Ta5+ components falling within a range of about 24.8% to about 65%, wherein
- a relationship expressed in Expression (1) given below is satisfied;
- (La3++Y3++Gd3+)×(Zr4++Hf4++Ta5+)≥400(%)2 (1).
3 more elements
Dependencies are inferred from the claim text.