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Germanium Window

Germanium Window (Ge Window) widely used in IR sensors, thermal image, medical and other applications.

Our products is enjoying an excellent reputation for it is good quality and high dimension tolerance.

Coating is available upon request.

Material Germanium
Diameter Tolerance +0.0/-0.1mm
Thickness Tolerance ±0.2mm
Clear Aperture >Central 85% of diameter
Surface Quality 60-40 S/D
Parallelism < 1 arc minute
Wavefront Distortion λ/4 per 25mm @632.8nm
Protective Bevel <0.25mm x 45°
Coating Uncoated
Germanium Window Standard Products:
Part No. φ(mm) T(mm)
10.0 1.0
12.7 2.0
25.4 2.0


Other sizes and coatings are available upon request.

The general tolerance specifications above provide a guideline regarding manufacturing capabilities for optics.

The manufacturing limits are not absolute; tighter tolerances may be possible.

Part specific tolerances may vary depending on component size, shape, and/or material.