Germanium (Ge) Components

  • Wide IR transmission range covering 1.8-16 µm
  • Opaque in visible range  

Germanium (Ge) based optical components are widely used for IR applications. Germanium (Ge) is well suited for manufacturing of windows and lenses for IR applications in lasers and optical systems. Ge components are used with AR coatings because of high surface reflectivity of substrate. The high refractive index ensures an exceptional single wavelength performance for a best "best form" singlet constructed from germanium.

Delivery

Estimated delivery time: from 4 - 5 days

Diameter
Thickness
Coating

Uncoated Windows

Code Diameter Thickness Coating Price Delivery Add to cart
580-6023 ø 25.4 mm 3.0 mm uncoated 109 $ 4 - 5 days To cart
580-6034 ø 38.1 mm 4.0 mm uncoated 231 $ Request To cart
580-6055 ø 50.8 mm 5.0 mm uncoated 329 $ 4 - 5 days To cart

Coated AR/AR@10.6 µm Windows

Code Diameter Thickness Coating Price Delivery Add to cart
580-6123 ø 25.4 mm 3.0 mm AR/AR@10.6 µm 175 $ 4 - 5 days To cart
580-6134 ø 38.1 mm 4.0 mm AR/AR@10.6 µm 296 $ Request To cart
580-6155 ø 50.8 mm 5.0 mm AR/AR@10.6 µm 407 $ Request To cart
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Physical Properties

Crystal type

cubic

Density, g/cm3

5.33

Melting point, °C

937

Refractive index @ 10.6 µm

n = 4.0034

Transmission band, µm

1.8-17

Lattice constant, Å

a = 5.657

 

Specifications

Material

Ge 

Surface quality

60-40 scratch & dig (MIL-PRF-13830B)

Clear aperture

80%  of diameter

Diameter tolerance

+0.0 -0.1 mm

Thickness tolerance

±0.2 mm

Parallelism

<3 arcmin

Flatness

<1.5 λ per inch @ 633 nm

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