OPTICAL MONOCRYSTAL Russian patent published in 2006 - IPC G02B1/02 

FIELD: optical materials; monocrystals for visible and IR spectral ranges.

SUBSTANCE: optical monocrystals can be used for making IR-light guides used in laser engineering, IR fiber optics and non-linear optics, low-temperature pyrometry, IR-spectroscopy. Monocrystal on base of solid solution of AgCl-AgBr has additionally two impurities with like valences. One has to be cationic - single-valence thallium and the other one has to be anionic, like iodine. Monocrystal has argentums iodide of 0.5-1.5 mass % and iodide of single-valence thallium of 1.0-3.0 mass % at content of argentums chloride of 18.0-22.0 mass % and argentums bromide of 77.5-76.5 mass %. Due to presence of Agl and TLI optical monocrystal shows better physical and chemical properties.

EFFECT: widened transparency range; increased hardness and radiation resistance; stability to visible, UV, IR and X-ray radiation.