| abstract |
The purpose of the present invention is to provide glass having excellent transmittance, an optical glass, a glass raw material for press molding, and an optical element. The invention relates to the glass including at least one type of oxide selected from TiO2, Nb2O5, WO3, and Bi2O3 as a glass component therefor, wherein the total content of the TiO2, the Nb2O5, the WO3, and the Bi2O3 is at least 20 mol%, and a betaOH value indicated in formula (1) fulfills the relationship indicated in formula (2). The formula (1) is that betaOH = - [1n(B/A)]/t. The formula (2) is betaOH ≥ 0.4891 * 1 n (1/HR) + 2.48. |