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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

Size: Dia10mm to 150mm
Tolerance: +0/-0.1
Surface Quality : 40/20 or 20/10 precision
Flatness : 1/4 lambda per inch @633nm, 1/8 lambda per inch @633nm
Parallelism :< 3 arc min 
Chamfer :0.25(+0.25/-0.00)mm × 45 Degree 
Material : Germanium monocrystal


Address: BLD# 61,Jinshan Industrial Area,Fuzhou,Fujian350008 China Tel: +86-591-8780 9021
Fax: +86-591-8780 1021 Email: sales@fitecoptics.com
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