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Germanium windows catalog

  • Uncoated or with AR coating for 3-12µm or 8-12µm or DLC/AR coated
  • Minimal Chromatic Aberration Due to Low Dispersion
  • Ideal for Infrared Applications Requiring Rugged Optics

Welcome to our Germanium windows catalog.

Germanium (Ge) Windows are available with two AR coating: 3-12µm for broadband multi-spectral applications, or 8-12µm for Thermal Imaging applications. Protective DLC coated Germanium windows for harsh environment can be supplied by request.

Custom Germanium windows (round, square) are available upon request. High Precision Germanium windows: We can provide up to 150mm diameter Germanium windows with S/D 20/10; Flatness 0.25 waves at 633 and parallelism up to 10 arc. sec. Please contact our sales team for your custom Germanium window price! Special prices on large diameter Ge windows.

Item Cat# Dia, in Dia,mm Th, in Th, mm
Germanium window GE-W-6.35-0.5 0.25 6.35 0.019 0.5
Germanium window GE-W-12.7-1 0.5 12.7 0.039 1.0
Germanium window GE-W-12.7-2 0.5 12.7 0.079 2.0
Germanium window GE-W-25.4-1 1 25.4 0.039 1.0
Germanium window GE-W-25.4-2 1 25.4 0.079 2.0
Germanium window GE-W-25.4-3 1 25.4 0.118 3.0
Germanium window GE-W-25.4-4 1 25.4 0.157 4.0
Germanium window GE-W-25.4-5 1 25.4 0.197 5.0
Germanium window GE-W-25.4-6 1 25.4 0.236 6.0
Germanium window (DLC/AR) GE-W-38.1-3 1.5 38.1 0.118 3.0
Germanium window GE-W-38.1-4 1.5 38.1 0.157 4.0
Germanium window GE-W-38.1-5 1.5 38.1 0.197 5.0
Germanium window GE-W-38.1-6 1.5 38.1 0.236 6.0
Germanium window GE-W-50.8-3 2 50.8 0.118 3.0
Germanium window GE-W-50.8-4 2 50.8 0.157 4.0
Germanium window GE-W-50.8-5 2 50.8 0.197 5.0
Germanium window GE-W-50.8-6 2 50.8 0.236 6.0
Germanium window GE-W-63.5-3 2.5 63.5 0.118 3.0
Germanium window GE-W-63.5-6 2.5 63.5 0.236 6.0
Germanium window GE-W-76.2-3 3.0 76.2 0.118 3.0
Germanium window GE-W-76.2-6 3.0 76.2 0.236 6.0
Germanium window Ge-W-101.6-8 4.0 101.6 0.315 8.0
Germanium windows GE-W-140-10 5.5 140 0.39 10
Germanium windows GE-W-152.4-10 6 152.4 0.39 10
Germanium window G-W-165-8 6.5 165 0.314 8
Germanium window Ge-W-170-5 6.69 170 0.197 5

Custom 100-180 mm diameter germanium windows are available upon request.

Ge windows with yellow mark are available on stock and can be shipped within 1-2 weeks. Ask now.

Ge windows standard specifications:
Diameter tolerance: +0/-0.1mm;
Thickness tolerance: +/-0.1mm;
Clear Aperture: 90%;
Parallelism: 3 arc min;
Flatness: 1/10 wave at 10.6 microns
Surface finish: S/D 60/40

See also: Germanium Lenses; Thermal Imaging Lenses