Partial dispersions of optical fluorophosphate glasses

Abstract

LgSK 528/767 (Δ v g,F = 14.6) and FK 486/817 (Δ v g,F = 19.0) are taken as the compositions of the base glasses in our work. The effects of about 30 compounds such as fluorides, phosphates, etc. on the partial dispersions have been studied and quantitative results have been obtained. Finally according to Sellmeir's dispersive theory, the relationships between the partial dispersions and the components of the optical fluorophosphate glasses have been discussed with dispersive equations, and satisfactory results have been obtained. The partial dispersive coefficients given by Gan Fuxi were substituted into the formula for computing the resultant partial dispersions of the glasses. We found that the computed results correspond to our experimental data. The results demonstrated that the computing system is valuable and can provide a theoretical basis for developing new types of glasses with anomalous partial dispersions.