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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

Germanium windows

Please contact our sales team for your custom Germanium window price! Special prices on large diameter Germanium 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.

Germanium windows standard specifications:
Germanium monocrystal optical grade
Resistivity: 5-40 Ohm*cm
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

Custom Germanium windows (round, square, wedges) 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.

See also: Germanium Lenses; Thermal Imaging Lenses