II-VI Germanium Window

I-VI Germanium (Ge) Optical Window – 2″ Diameter x 0.200″ Thick

Material: Germanium (Ge)
Manufacturer: II-VI (now part of Coherent)

Physical Dimensions

• Diameter: 2.00 inches (50.8 mm)

• Thickness: 0.200 inches (≈5.08 mm)

Surface Specifications

• S1: Polished Optical (PO), Uncoated (UC)

• S2: Polished Optical (PO), Uncoated (UC)

Both faces are optically polished and left uncoated, making this window suitable for broadband IR use where coating losses or wavelength-specific coatings are not required.

Optical Characteristics (Typical for Germanium)

• Transmission Range: ~2–14 µm (infrared)

• High refractive index: ~4.0 @ 10.6 µm

• Excellent thermal conductivity, suitable for moderate-power IR laser applications

Common Applications

• Infrared imaging systems

• Thermal cameras and sensors

• CO₂ laser systems (low to moderate power, uncoated)

• IR spectroscopy and laboratory optics