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AR coating Ge lens

Material: GE
Diameter: +/-0.1mm
Tolerance: +/-0.1mm
Sphericity: 3(0.5)
Surface Quality: 20/10~60/40
Coating: yes
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Substrate

Germanium (Ge)

Density (g/cm3)

5.33

Coefficient of Thermal Expansion CTE (10-6/°C)

6.1

Index of Refraction nd

4.002 @ 11µm

Knoop Hardness (kg/mm2)

780.00

Poisson's Ratio

0.28

Young's Modulus (GPa)

102.7

Dimensional Tolerance (mm)

+0.0/-0.1

Thickness Tolerance (mm)

±0.1

Surface Quality

60-40

Parallelism (arcmin)

<1

Clear Aperture (%)

>90%


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