Heavy metal fluoride (HMF) ylasses are of considerable interest for use as multispectral optical components. HMF glass samples of different compositions were prepared and subjected to different doses of gamma radiation at room temperature. Optical absorption measurements showed that strong damage occurred in the UV and visible regions and no significant losses were detected in the infrared region.
Osama H. El-Bayoumi,
"Annealing if induced damage in fluoride glass components", Proc. SPIE 1438, Laser-Induced Damage in Optical Materials 1989, 14380F (1 November 1990); doi: 10.1117/12.2294424; https://doi.org/10.1117/12.2294424