| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to production of special flint type optical glass for making glass pairs in a high-aperture double-lens apochromatic object glass. The kurz-flint type optical glass contains SiO, BO, AlO, KO, NaO, ZnO, CaO, ZrO, TaO, GeOand AsOwith the following ratio of components (in wt %): SiO12.5-30.3; BO37-49.2; AlO4-6; KO 1-5; NaO 1.4-4; ZnO 2.5-3.9; CaO 2-4; ZrO1.9-6; TaO7.5-14.2; GeO4-6; AsO0.1-1. The glass has melting temperature of 1450-1470°C and group A-II chemical resistance.EFFECT: optical glass with low relative partial dispersion values.2 tbl |
