OPTICAL MONOCRYSTAL Russian patent published in 2013 - IPC G02B1/02 

FIELD: physics.

SUBSTANCE: monocrystals are designed for infrared equipment and for making, by extrusion, single- and multi-mode infrared light guides for the spectral range from 2 mcm to 50 mcm, wherein a nanocrystalline structure of infrared light guides with grain size from 30 nm to 100 nm is formed, which determines their functional properties. The monocrystal is made from silver bromide and a solid solution of a bromide and iodide of univalent thallium (TIBr_0.46I_0.54), with the following ratio of components in wt %: silver bromide 99.5-65.0; solid solution TIBr_0.46I_0.54 0.5-35.0.

EFFECT: reproducibility and predictability of properties, avoiding cleavage effect, resistance to radioactive, ultraviolet, visible and infrared radiation.