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High Precision Optical Infrared Isosceles Customized Germanium Ge Prism

Basic Information
Place of Origin: Wuhan,China
Brand Name: Wuhan Siwer Optics
Minimum Order Quantity: 4 pieces
Price: 50-300USD/piece
Packaging Details: 1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler
Delivery Time: 4-6 weeks
Payment Terms: T/T, Western Union
Supply Ability: 3000 pieces/month
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Detail Information
Material: Single Crystal Germanium Size Tolerance: +/-0.1mm
Chamfer: 0.2-0.5mm Surface Quality: 40/20
Surface Flatness: Lambda/4 In 25.4mm Parallelism: 0.01mm
Standard Coating: AR/AR@8-14um Or Customized Size Range: 5-300mm
Usage: Infared System

Product Description

Infrared Germanium Prism

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.

High Precision Optical Infrared Isosceles Customized Germanium Ge Prism High Precision Optical Infrared Isosceles Customized Germanium Ge Prism High Precision Optical Infrared Isosceles Customized Germanium Ge Prism


 

Production Line

High Precision Optical Infrared Isosceles Customized Germanium Ge Prism
 


Optical Properties of Germanium Prism

Material Single Crystal Germanium
AR Coating Range 3-5um,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 Quality 60-40 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 Wavelength 10.6 μm

 
 


Transmittance of Antireflection coatings:

 

High Precision Optical Infrared Isosceles Customized Germanium Ge PrismHigh Precision Optical Infrared Isosceles Customized Germanium Ge Prism

High Precision Optical Infrared Isosceles Customized Germanium Ge PrismHigh Precision Optical Infrared Isosceles Customized Germanium Ge Prism  


Germanium properties:

Chemical Formula Ge
Crystal Form Poly or Single Crystal
Crystal Class Cubic
Resistivity, Ohm*cm 0.01-40
Lattice Constant, Å 5.66
Molecular Weight 72.6
Density, g/cm3 at 300 K 5.33
Dielectric Constant for 9.37 x 109 Hz at 300 K 16.6
Melting Temperature, K 1210
Thermal Conductivity, W/(m K) at 293 K 59
Thermal Expansion, 1/K at 298 K 6.1 x 10-6
Specific Heat, cal/(g K) at 273-373 K 0.074
Debye Temperature, K 370
Bandgap, eV 0.67
Solubility in water None
Knoop Hardness, kg/mm2 800
Mohs Hardness 6.3
Young's Modulus, GPa 102.66
Shear Modulus, GPa 67.04
Bulk Modulus, GPa 77.86
Poisson's Ratio 0.278

 

 


Infrared Elements Selection Guide

High Precision Optical Infrared Isosceles Customized Germanium Ge Prism
 

Contact Details
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