US 12,330,984 B2
Glass and optical element
Koichi Sato, Tokyo (JP); Yoshitake Tanno, Tokyo (JP); and Naomi Matsumoto, Tokyo (JP)
Assigned to HOYA CORPORATION, Tokyo (JP)
Filed by HOYA CORPORATION, Tokyo (JP)
Filed on Jan. 28, 2022, as Appl. No. 17/587,298.
Claims priority of application No. 2021-016560 (JP), filed on Feb. 4, 2021.
Prior Publication US 2022/0250968 A1, Aug. 11, 2022
Int. Cl. C03C 3/16 (2006.01); C03C 3/21 (2006.01); G02B 1/00 (2006.01); G02B 5/00 (2006.01)
CPC C03C 3/16 (2013.01) [C03C 3/21 (2013.01); G02B 1/00 (2013.01); G02B 5/00 (2013.01)] 13 Claims
 
1. An oxide glass, wherein:
a content of P5+ is 7 to 43 cation %,
a content of Nb ions is 10 to 21 cation %,
a content of Li+ is 30 cation % or more,
a total content of Nb ions and Li+ is 48 to 70 cation %,
a content of Bi ions is more than 0 cation % and is equal to or less than 6 cation %,
a content of Ba2+ is 5 cation % or less,
a content of Zr4+ is 2 cation % or less,
a total content of Ti ions and W ions is 5 cation % or less, and
a cation ratio of the content of Li+ to a total content of Li+, Na+, and K+ [Li+/(Li++Na++K+)] is 0.7 or more.