Optical phosphate glass with high refractive index and Abbe number - comprises oxide(s) of magnesium, calcium, strontium, barium, zinc and phosphorus, and fluoride

摘要

Optical phosphate glass with amorphous partial dispersion in the blue range of the spectrum consists of 9wt.%) 2-6 MgO, 0-2 CaO, 0-3 SrO, 45-51 BaO, 0-1 ZnO, such that the total of these oxides is 47-56; 44-49 P2O5, 0-0.6 F, and 0-0.5 F2-O. Pref. the ratio of total oxides to P2O5 is 1-1.4. ADVANTAGE - Refractive index greater than 1.57, Abbe number greater than 64.