Photoelastic effects in some fluoride glasses based on the ZrF 4BaF 2 system

Abstract

The stress-optical coefficients and elastic moduli of some fluoride glasses based on ZrF 4BaF 2 were measured, and the photoelasticity mechanisms were analyzed based on the equations expressing the relation among the photoelastic constants, the elastic moduli and the refractive index of glasses. The stress-optical coefficients and the strain-optical coefficients of fluoride glasses were found to be extraordinarily small, being almost zero. It was concluded that the small photoelasticities of fluoride glasses were due to the ionic bond in fluoride glasses.