Raw material: pure semi-metal Ge 4n germanium sheet raw material

Germanium (Ge) is the preferred lens and window material for high performance infrared imaging systems in the 8-12 μm wavelength bands. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface curvature. Chromatic aberration is small, often eliminating the need for correction.   G

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Raw Material Pure Semi-Metal Ge 4n Germanium Wafer Raw Material
Germanium (Ge) is the preferred lens and window material for high performance infrared imaging systems in the 8-12 μm wavelength bands. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface curvature. Chromatic aberration is small, often eliminating the need for correction.   Germanium is most widely used for lenses and windows in IR systems operating in the 2μm-12μm range. Germanium is a high index material that is used to manufacture Attenuated Total Reflection (ATR) prisms for spectroscopy. Its refractive index is such that germanium makes an effective natural 50% beamsplitter without the need for coatings. It is also used extensively as a substrate for production of optical filters. Germanium covers the whole of the 8-14 μm thermal bands and is used in lens systems for thermal imaging. It can be AR coated with diamond producing an extremely tough front optic. Physical and optial properties:

Raw Material Pure Semi-Metal Ge 4n Germanium Wafer Raw Material
Gearmanium raw material

 

  • Czochralski (CZ) grown material
    • Custom grades - as specified
    • Optical grade (>99.99999%)
    • Solar grade (>99.999%)
  • Crystal structure
    • Single crystal
    • Poly‐crystal
  • Orientation  ,
  • Dopant
    • N‐type (Antimony)
    • P‐type (Gallium)
  • Resistivity
    • Standard optical requirements
    • Custom grows (0.005-500 Ω‐cm)
    • Undoped
Raw Material Pure Semi-Metal Ge 4n Germanium Wafer Raw MaterialRaw Material Pure Semi-Metal Ge 4n Germanium Wafer Raw Material
Physical properties:
Material: Germanium
Bevel: 0.25x45deg
Diameter Tolerance:+0.00,-0.15mm(Standard). +0.00,-0.05mm(Precision)
Thickness Tolerance:+/-0.1mm
Flatness: lambda/2 at 632.8nm
Surface Quality:60-40 S/D
Paraxial Focus Length +/-2%
Centration:< 10 arc minutes
Clear Aperture:>85% of diameter

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