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28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism

    Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers
     
    Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers
    • Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers
    • Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers
    • Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers
    • Buy cheap 28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism from wholesalers

    28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism

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    Brand Name : Wuhan Siwer Optics
    Price : 700USD/piece
    Payment Terms : T/T, Western Union
    Supply Ability : 500 pieces/month
    Delivery Time : 5-7weeks
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    28 Deg Apex Angle Isosceles Germanium Ge Prisms , Germanium Wedge Prism

    Germanium (Ge) wedge prisms

    The refractive index of single crystal germanium material is higher than 4.0, and the wedge prism made of single crystal germanium has strong deflection ability to infrared light.

    Such as a 2-degree germanium wedge prism can deflect infrared light by 6 degrees.


    Germanium material is softer than other optical materials, and there are many surfaces should be polished,so the surface quality of germanium prism is easier to be destroyed in the processing.
    Because germanium material does not penetrate the visible light, it can not use the self-collimation method to measure the angular accuracy as other materials'prisms.
    These factors lead to high production cost of germanium prism.


    In infrared system, it is sometimes necessary to deflect the infrared light (especially the light with 8-14um wavelength) at a certain angle, and germanium prism is very suitable for it.

    Since the Refractive index of single crystal germanium is 4.0, its critical angle is only 14.5 degrees, it is very conducive to the propagation of light beam in the prism.

    We have customized various germanium prisms for many university laboratories and other similar research departments. We have many years of experience in this field.

    We can customize germanium prisms for you.Or you just need to tell us what you need to achieve,Our engineers can recommend or design suitable prisms for you.
    More details please contact us.



    Production Line



    Optical Properties of Germanium Prism

    MaterialSingle Crystal Germanium
    AR Coating Range3-5um,8-12um,3-11um
    Reflectance over
    AR Coating Range @ 0° AOI

    Ravg < 2%,3-5um or 8-12um

    Ravg<5%,3-11um

    Transmission over
    AR Coating Range @ 0° AOI
    Tavg > 94%,3-5um or 8-12um
    Diameter Tolerance+0.0/-0.1 mm
    Thickness Tolerance±0.1 mm
    Focal Length Tolerance±2%
    Surface Quality60-40 Scratch-Dig
    Surface Flatness
    (Plano Side)
    λ/2 at 633nm
    Spherical Surface Powerc
    (Convex Side)
    1.5λ at 633nm
    Surface Irregularity
    (Peak to Valley)
    λ/2 at 633nm
    Centration<3 arcmin
    Clear Aperture>Ø10.16 mm (Ø1/2" Lenses)
    >Ø20.32 mm (Ø1" Lenses)
    Design Wavelength10.6 μm



    Transmittance of Antireflection coatings:



    Germanium properties:

    Chemical FormulaGe
    Crystal FormPoly or Single Crystal
    Crystal ClassCubic
    Resistivity, Ohm*cm0.01-40
    Lattice Constant, Å5.66
    Molecular Weight72.6
    Density, g/cm3 at 300 K5.33
    Dielectric Constant for 9.37 x 109 Hz at 300 K16.6
    Melting Temperature, K1210
    Thermal Conductivity, W/(m K) at 293 K59
    Thermal Expansion, 1/K at 298 K6.1 x 10-6
    Specific Heat, cal/(g K) at 273-373 K0.074
    Debye Temperature, K370
    Bandgap, eV0.67
    Solubility in waterNone
    Knoop Hardness, kg/mm2800
    Mohs Hardness6.3
    Young's Modulus, GPa102.66
    Shear Modulus, GPa67.04
    Bulk Modulus, GPa77.86
    Poisson's Ratio0.278


    Infrared Elements Selection Guide


    Product Tags:

    optical wedge prism

      

    right angle prism

      
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