| 摘要 |
A non-lead optical glass consisting essentially of, as represented by mol %, from 45 to 75% of Bi<SUB>2</SUB>O<SUB>3</SUB>, from 12 to 45% of B<SUB>2</SUB>O<SUB>3</SUB>, from 1 to 20% of Ga<SUB>2</SUB>O<SUB>3</SUB>, from 1 to 20% of In<SUB>2</SUB>O<SUB>3</SUB>, from 0 to 20% of ZnO, from 0 to 15% of BaO, from 0 to 15% of SiO<SUB>2</SUB>+Al<SUB>2</SUB>O<SUB>3</SUB>+GeO<SUB>2</SUB>, from 0 to 15% of MgO+CaO+SrO, from 0 to 10% of SnO<SUB>2</SUB>+TeO<SUB>2</SUB>+TiO<SUB>2</SUB>+ZrO<SUB>2</SUB>+Ta<SUB>2</SUB>O<SUB>3</SUB>+Y<SUB>2</SUB>O<SUB>3</SUB>+WO<SUB>3 </SUB>and from 0 to 5% of CeO<SUB>2</SUB>, wherein Ga<SUB>2</SUB>O<SUB>3</SUB>+In<SUB>2</SUB>O<SUB>3</SUB>+ZnO>=5%. An optical fiber comprising the above non-lead optical glass as a core.
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