| 摘要 |
An optical glass includes a substance A generating light of a wavelength λ2 when irradiated with light of a wavelength λ1 and a substance B generating light of a wavelength λ3 when irradiated with light of the wavelength λ1 in the case where the optical glass includes 5-50 ppm Fe with respect to a 100% basic glass composition containing at least, 2-10% SiO2, 5-45% B2O3, and 30-60% La2O3, by weight, or the relation of the wavelength λ1, the wavelength λ2, and the wavelength λ3 is assumed to be λ1<λ2<λ3 with respect to a 100% basic glass composition containing; at least, 2-10% SiO2, 5-45% B2O3, 30-60% La2O3, 0-15% RO (R=Zn, Sr, Ba), 0-40% Ln2O3 (Ln=Y, Gd), and 0-30% total of ZrO2+Nb2O5+Ta2O5, by weight. |
