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Infrared Optics
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Ge Crystal
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Germanium (Ge) Crystal

Germanium (Ge) Crystal is widely used for the lense, prism and window material of IR filters, CO2 lasers and infrared imaging systems. The material is now available at GK East with a maximun diameter of 300mm for single crystal and 380mm for polycrystal and various shapes of rod, disc, slate, etc.

Main Properties:

Transparent Region (µm)
1.8-23
Hardness (kg/cm2)
800
Density (g/cm3)
5.33
Young's Modulus (GPa)
103
Rupture Modulus (Mpa)
75
Specific Heat (Cal/g.k.)
0.074
Dielectric Constant
16
Thermal Expansion Coefficient (10-6/ )
6.1
Resistivity (.cm)
003-50
Homogeneity of Resistivtity
15%
Bulk Absorption Coefficient (/cm)
0.112
Refractive lndex (µm)
40.026
Poisson Ratio
0.28
Melting Point ()
937

 

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