ABSTRACT
Experimental study, theoretical description, and mathematical simulation of spectral characteristics play important roles in the creation of materials with variable light transmittance that possess a number of required properties. Darkening of photochromic glasses is a visually observed result of the photoinduced generation of color centers. The absorption spectrum of nonirradiated photochromic glass and the color center generation spectrum may be appreciably affected by different dopants and heat treatment conditions. The observed absorption spectrum of a nonirradiated photochromic glass is averaged over the ensemble of photosensitive microcrystals of different size dispersed in a glass host. The photoinduced absorption spectra of irradiated photochromic glasses doped with either silver bromide or silver chloride present broad bands that cover almost all visible spectra, with the maximum in the range of 500 to 600 nm.
