germanium-parallel-windows

Germanium Optical Windows

Specifications

Technical Specs

Material
Optical Grade Germanium
Surface Flatness
λ/20 @ 10.6 µm
Surface Quality
40-20 scratch-dig
Cleaning
See How to Clean Optics
Clear Aperture
10GE20: central 85% of diameter
GEW: central 90% of diameter

Diameter Tolerance
10GE20: ±0.2 mm
GEW: +0.0/-0.1 mm
Thermal Expansion Coefficient
6.1 x 10^-6 K^-1 @ 298 K
Thermal Limit
59 W m^-1 K^-1 @ 293 K

Material
Optical Grade Germanium
Surface Flatness
λ/20 @ 10.6 µm
Surface Quality
40-20 scratch-dig
Cleaning
See How to Clean Optics
Clear Aperture
10GE20: central 85% of diameter
GEW: central 90% of diameter

Diameter Tolerance
10GE20: ±0.2 mm
GEW: +0.0/-0.1 mm
Thermal Expansion Coefficient
6.1 x 10^-6 K^-1 @ 298 K
Thermal Limit
59 W m^-1 K^-1 @ 293 K

Resources & Downloads

Selection Guides

Optical Window Guide

Technical Notes

Optical Materials