Germanium windows, Germanium lenses, infrared products

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Germanium Windows and Germanium lenses

Germanium (Ge) is the preferred lens and window material for high performance infrared imaging systems in the 8–*2 um wavelength band. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface curvature. Chromatic aberration is small, often eliminating the need for correction.
Germanium is most widely used for lenses and windows in IR systems operating in the 2 um - *2 um range. Its transmission is very temperature sensitive, becoming opaque near **0°C.

Ge Windows
specifications:
Material: Germanium
Diameter Tolerance:*0, *0.1mm
Thickness Tolerance:±0.1mm
Focal Length Tolerance: ±1%
Surface Quality: ****0 scratch and dig
Surface Figure: :lambda/2

Clear Aperture: >*5% of diameter
Bevel: 0.*5x*5deg
Coating: Upon requirement

For germanium material we could make germanium windows and germanium lenses products.

For infrared products, besides germaniu, we also could make CaF2, MgF2, BaF2, ZnSe, ZnS, Sapphire etc products.