Optical glass and use thereof

摘要

An aspect of the present invention relates to optical glass, which is oxide glass including cation components in the form of 10 to 40 cation % of P5+, equal to or more than 50 cation % of a combined quantity of Ti4+, Nb5+, W6+, Bi3+, and Te4+, with a cation ratio of a combined content of Ti4+ and Nb5+ to a combined content of W6+ and Bi3+ being equal to or less than 1.3, a combined quantity of B3+, Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+ which amounts to equal to or less than ⅓ of a combined content of Ti4+, Nb5+, W6+, Bi3+, and Te4+, and more than 0 % of Li+, Na+, K+, Rb+, and Cs+ combined, and which has a refractive index of equal to or higher than 2.02.

主权项

1. An optical oxide glass, comprising cationic components that include:
10 to 40 cation % of P5+; 50 cation % or more of a combined content of Ti4+, Nb5+, W6+, Bi3+, and Te4+, a ratio of a combined content of Ti4+and Nb5+to a combined content of W6+and Bi3+,(Ti4++Nb5+)/(W6+Bi3+), being 0.9 or less; a combined content of B3+, Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+that is ⅓ or less of the combined content of Ti4+, Nb5+, W6+, Bi3+, and Te4+; and more than 0% of a combined content of Li+, Na+, K+, Rb+, and Cs+; wherein the optical glass has a refractive index of 2.02 or more.