| 摘要 |
An optical glass for press-molding contains as glass ingredients, by weight: 0.5-4% SiO<SUB>2</SUB>; 20-30% B<SUB>2</SUB>O<SUB>3</SUB>; 10-20% ZnO; 1-10% ZrO<SUB>2</SUB>; 30-45% La<SUB>2</SUB>O<SUB>3</SUB>; 5-12% Nb<SUB>2</SUB>O<SUB>5</SUB>; 1-15% WO<SUB>3</SUB>; 0.5-3.5% TiO<SUB>2</SUB>; 0.5-3% CaO; 0.1-0.5% Li<SUB>2</SUB>O; 0-0.4% Na<SUB>2</SUB>O (zero inclusive); and 0-0.4% K<SUB>2</SUB>O (zero inclusive), with the total content of Li<SUB>2</SUB>O+Na<SUB>2</SUB>O+K<SUB>2</SUB>O accounting for 0.1-0.5%.
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