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Germanium Windows
LaboratoriesOptical Material Data – Germanium Windows
Germanium – Ge
Optical Material used for lenses, windows, prisms, mirrors and filters.
Windows are used to isolate different physical environments whilst allowing light to pass.
When selecting windows it is important to consider the following:
Materials
Transmission
Scattering
Wavefront Distortion
Parallelism
Material Specification:
Transmission Range – 1.8-23.0 µ
Crystal Structure – Diamond
Cleavage Plane – 111
Colour – Metallic Lustre
Density -5.327
Melting Point (°) – 942
Reflection Loss – 52.9% (10µ) for 2 surfaces
Solubility Index – Insoluble
Hardness (Knoop) – 692
Thermal Conductivity (Cal/cm sec°C) – 0.14 (20°C)
Thermal Expansion coefficient (/°C) -5.5×10-6 (25°C)
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Germanium, Lenses, Windows, global, optics Product code: Germanium