Germanium

Germanium features high refractive index, wide infrared transmission range, low absorption coefficient, low dispersion, and is easy to process. Germanium is the most commonly used material for producing IR optical lenses and IR optical windows. Due to its excellent transmit-tance in the infrared spectrum and opacity in the visible spectrum, Germanium is highy suitable for fabricating optical components used in infrared lasers and thermal imaging applications.It can be used as a material for windows, lenses, prisms, and filters for thermal imagers and infrared radar, and in other infrared optical devices used in critical civilian applications.