High Precision Optical Infrared Isosceles Customized Germanium Ge Prism
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High Precision Optical Infrared Isosceles Customized Germanium Ge Prism
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Brand Name :Wuhan Siwer Optics
Place of Origin :Wuhan,China
MOQ :4 pieces
Price :50-300USD/piece
Payment Terms :T/T, Western Union
Supply Ability :3000 pieces/month
Delivery Time :4-6 weeks
Packaging Details :1.Tissue paper. 2.Plastic foam packaging film. 3.Hard carton box with quakeproof filler
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
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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.
Production Line
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:
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
What's the way of shipping? We accept DHL, Fedex, TNT, UPS, SF, EMS etc. If you have your own express account, it's great.
How to pay?
(1) T/T, PayPal, West Union,etc
(2) Bank Fee: West Union-USD30.00(≤USD3000.00),
T/T-USD20.00+, PayPal-5%. Please consult the local bank.
What's the deliver time? For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.
Can I customize the products based on my need? Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.
