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Customized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

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Wuhan Siwer Optics Co.,Ltd
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Customized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

Brand Name : Wuhan Siwer Optics

Place of Origin : Wuhan,China

MOQ : 5 pieces

Price : 25-98USD/piece

Payment Terms : T/T, Western Union

Supply Ability : 3000 pieces/month

Delivery Time : 3-4 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

Size range : 5-300mm

Usage : Infared system

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Customized germanium window

Sometimes, our customers need to customize special germanium windows for their new products. Our customized germanium windows can meet their needs very well.

The transmittance range of the optical germanium material is 2-14 um, and the refractive index is as high as 4. Germanium lens and germanium window are widely used in thermal imaging system.
Germanium window is a common protective window in infrared imaging system. Its material quality, surface smoothness, parallelism, surface quality and coating quality will directly affect the imaging effect.
The resistivity of optical grade single crystal germanium material we choose is usually 5-40 Ohms. If the customer requests, we can also choose germanium material with specified resistivity.
Due to the high refractive index and high surface reflectivity of germanium (r > 30%), optical germanium windows usually need AR coating on its surface.
If the equipment is used in a bad environment, the outer side of the germanium protection window needs to be coated with DLC Coating.DLC Coating has excellent wear resistance, acid resistance and corrosion resistance.


Optical Properties of Germanium Window

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
Parallelism 3 arc min
Surface Quality 60-40 Scratch-Dig
Surface Flatness
(Plano Side)		 λ/2 at 633nm
Surface Irregularity
(Peak to Valley)		 λ/2 at 633nm
Clear Aperture >Ø10.16 mm (Ø1/2" Lenses)
>Ø20.32 mm (Ø1" Lenses)
Design Wavelength 10.6 μm


Transmittance of Antireflection coatings:

Customized Germanium Ir Window With High Refractive Index And High Surface ReflectivityCustomized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

Customized Germanium Ir Window With High Refractive Index And High Surface ReflectivityCustomized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

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

Production process

Customized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

Infrared Elements Selection Guide

Customized Germanium Ir Window With High Refractive Index And High Surface Reflectivity

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.


Product Tags:

optical window

      

infrared system protectd window

      
Quality Customized Germanium Ir Window With High Refractive Index And High Surface Reflectivity for sale

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