Germanium Optical Windows

2-16 μm
Ideal for IR applicaitons
Minimize chromatic aberration due to low dispersion

Features
Ideal Longpass Filter for Above 2 µm
Highly temperature sensitive
Inert to air, water, alkalis, and many acids
Uncoated and AR-Coated Versions Available
In-house OEM and custom manufacturing solutions

Applications
IR Laser… etc.
Please contact us for more specific applications and markets.

MicoSpectra also offers Wedged Windows fabricated from N-BK7, UV Fused Silica, and other substrate materials. If you are looking for the wedged windows, please contact us for more information.

Optical material Germanium
Size Ø12.5, Ø20, Ø25, Ø25.4, Ø30
Round and rectangular custom size available
Size tolerance Diameter, +0.0/-0.2mm
Thickness, ±0.3mm
Surface quality 40-20 Scratch-Dig
Surface flatness λ
Parallelism <1 arc min
Wavelength range 2 - 16 μm (Uncoated)
AR coating R<2%, custom wavelength
Clear Aperture >80% of central dimension
Wavelength Range Substrate Material
350 nm - 2.0 μm N-BK7
185 nm - 2.1 μm UV Fused Silica
150 nm - 5.0 μm Sapphire
120 nm - 8.0 μm Magnesium Fluoride (MgF2)
180 nm - 8.0 μm Calcium Fluoride (CaF2)
3 - 5 μm Barium Fluoride (BaF2)
600 nm - 16 µm Zinc Selenide (ZnSe)
1.2 - 8.0 μm Silicon (Si)
2.0 - 16 μm Germanium (Ge)