Germanium

Germanium has the highest index of refraction among commonly used infrared transmitting materials . It is a very popular material for systems operating in the 3-5um or 8-12um spectral region. Germanium has nearly the highest density of the infrared transmitting material and this should be taken into account when designing for weight-restricted systems. Ge is subject to thermal runaway, which means that the hotter it gets, the more the absorption increases. We produce Germanium optics as mirror,lens,window,etc