Used as transparent barriers for sending and receiving light between two phases under varying conditions in temperature pressure chemical composition cleanliness and phase. Germanium crystal windows used primarily for light in the infrared region of wavelengths from 2 to 20μm at which Germanium crystal offers higher internal transmittance.
Standard Specifications
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Items
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Specifications
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Material
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Germanium (Ge)
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Density
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5.33g/cm3
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Heat Transfer Coefficient
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58.6 W/m・K
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Dimension Tolerance
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+0.0/-0.2 mm
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Thickness Tolerance
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± 0.2 mm
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Clear Aperture
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> 90%
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Parallelism
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< 3 arc minutes
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Flatness
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λ/4 at 632.8 nm
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Surface Quality
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scratch and dig 60-40
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Bevel
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0.5 (0/-0.3) mm
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