Germanium (Ge) optical window

K9 optical window


  • In the range of 2-12μm, germanium is the most commonly used material for optical lens and optical window in high-efficiency infrared imaging system. Germanium has a high refractive index in band with 2-14μm, It is about 4.0, and the characteristics of minimum surface curvature and small color difference usually do not need to be corrected in low-power imaging system.

Technical parameters
Items Parameters
Material Germanium (Ge)
Radius of curvature ± 1mm - ± 50000mm ± 1%
Diameter 3mm-300mm ± 0.1mm
Center thickness tolerance ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation 3′(we can process to 30 ″with high precision)
Surface accuracy λ/ 2
Surface quality 60/40
Effective caliber ≥90%
Coating According to the custom requirements
spectral curve

In addition, We can customize the optical window according to customer requirements or drawings.

For details, please consult:

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