Optical glass, optical element including optical glass, and optical apparatus
Provided is optical glass containing, in terms of mol % of cations: 10 to 60% of a La 3+ component; more than 0% and up to 75% of a Ga 3+ component; and 5 to 75% of a Nb 5+ component, in which a total amount of the La 3+ component, Ga 3+ component, and Nb 5+ component is 60 to 100%.
1. Optical glass containing, in terms of mol % of cations:
10 to 60% of a La 3+ component;
more than 0% and up to 75% of a Ga 3+ component; and
5 to 75% of a Nb 5+ component,
wherein a total amount of the La 3+ component, the Ga 3+ component, and the Nb 5+ component is 60 to 100%.
2. The optical glass according to claim 1 , containing, in terms of mol% of cations:
30 to 60% of a La 3+ component.
3. The optical glass according to claim 1 , containing, in terms of mol% of cations:
40 to 55% of a La 3+ component.
4. The optical glass according to claim 1 , containing, in terms of mol% of cations:
10 to 70% of a Ga 3+ component.
5. The optical glass according to claim 1 , containing, in terms of mol% of cations:
20 to 60% of a Ga 3+ component.
6. The optical glass according to claim 1 , containing, in terms of mol% of cations:
10 to 75% of a Nb 5+ component.
7. The optical glass according to claim 1 , containing, in terms of mol% of cations:
5 to 60% of a Nb 5+ component.
8. The optical glass according to claim 1 , containing, in terms of mol% of cations:
10 to 60% of a Nb 5+ component.
9. The optical glass according to claim 1 , containing, in terms of mol% of cations:
10 to 50% of a Nb 5+ component.
10. The optical glass according to claim 1 , wherein the total amount of the La 3+ component, the Ga 3+ component, and the Nb 5+ component is 80 to 100%.
11. The optical glass according to claim 1 , further containing at least one component selected from a group consisting of Ti 4+ , Zr 4+ , Hf 4+ , Ta 5+ , W 6+ , Al 3+ , B 3+ , Si 4+ , Ge 4+ , Zn 2+ , Y 3+ , Gd 3+ , Lu 3+ , Mg 2+ , Ca 2+ , Sr 2+ , and Ba 2+ .
12. The optical glass according to claim 1 , containing, in terms of mol % of cations:
0 to 30% of a B 3+ component;
0 to 20% of a Si 4+ component; and
0 to 20% of a Ge 4+ component,
wherein a total amount of the B 3+ component, the Si 4+ component, and the Ge 4+ component is 0 to 30%.
13. The optical glass according to claim 1 , wherein the total amount of the B 3+ component, the Si 4+ component, and the Ge 4+ component is 0%.
14. The optical glass according to claim 1 , containing, in terms of mol % of cations:
0 to 30% of a Ti 4+ component;
0 to 20% of a Zr 4+ component;
0 to 20% of a Hf 4+ component;
0 to 30% of a Ta 5+ component;
0 to 20% of a W 6+ component;
0 to 30% of Al 3+ component; and
0 to 20% of Zn 2+ component,
wherein a total amount of a Ln 3+ component (representing one or more of Ln=Y, Gd, and Lu) is 0 to 30%, and a total amount of a R 2+ component (representing one or more of R=Mg, Ca, Sr, and Ba) is 0 to 20%.
15. The optical glass according to claim 1 , containing, in terms of mol% of cations:
20 to 30% of a Ti 4+ component;
5 to 10% of a Zr 4+ component;
10 to 20% of Ta 5+ component; and
10 to 30% of Al 3+ component,
wherein a total amount of a Ln 3+ component (representing one or more of Ln=Y, Gd, and Lu) is 20 to 30%.
16. The optical glass according to claim 15 , wherein a total amount of a R 2+ component (representing one or more of R=Mg, Ca, Sr, and Ba) is 0%.
17. The optical glass according to claim 15 , containing, in terms of mol% of cations:
0 to 20% of a Hf 4+ component;
0 to 20% of a W 6+ component; and
0 to 20% of a Zn 2+ component.
18. The optical glass according to claim 1 , wherein a refractive index (n d ) in a d-line is 1.85 to 2.25.
19. The optical glass according to claim 1 , wherein an Abbe number (ν d ) is 19 to 37.
20. The optical glass according to claim 1 , wherein a wavelength (UVλ 5 ) at which an ultraviolet transmittance value including a surface reflection loss becomes 5% under a condition of a thickness of 1 mm is 370 nm or less.
21. The optical glass according to claim 1 , wherein a wavelength (IRλ 5 ) at which an infrared transmittance value including a surface reflection loss becomes 5% under the condition of the thickness of 1 mm is 6 μm or more.
22. An optical element comprising the optical glass according to claim 1 .
23. An optical apparatus comprising the optical element according to claim 22 .