| 摘要 |
<p>Disclosed is an optical glass which comprises: 100 wt% of a base glass composition comprising at least 2 to 10 wt% of SiO<SUB>2</SUB>, 5 to 45 wt% of B<SUB>2</SUB>O<SUB>3</SUB> and 30 to 60 wt% of La<SUB>2</SUB>O<SUB>3</SUB>; and 5 to 50 ppm of Fe. Also disclosed is an optical glass which comprises: 100 wt% of a base glass composition comprising 2 to 10 wt% of SiO<SUB>2</SUB>, 5 to 45 wt% of B<SUB>2</SUB>O<SUB>3</SUB>, 30 to 60 wt% of La<SUB>2</SUB>O<SUB>3</SUB>, 0 to 15 wt% of RO (R = Zn, Sr, Ca, Ba), 0 to 40 wt% of Ln<SUB>2</SUB>O<SUB>3</SUB> (Ln = Y, Gd), and 0 to 30 wt% of ZrO<SUB>2</SUB>+Nb<SUB>2</SUB>O<SUB>5</SUB>+Ta<SUB>2</SUB>O<SUB>5</SUB>; and a substance A which can emit a light having a wavelength of ?2 when the substance A is irradiated with a light having a wavelength of ?1, and a substance B which can emit a light having a wavelength of ?3 when the substance B is irradiated with the light having a wavelength of ?1, wherein the wavelengths ?1, ?2 and ?3 have the following relationship: ?1 < ?2 < ?3.</p> |
