Large size 130mm single crystal germanium window for national defense and military instruments

Ge has high refractive index, The transmission wavelength for Monocrystal Germanium is 2-12um, it is a common infrared crystal which is widely used for infrared image system and infrared spectrograph systems. Ge has a small absorbency at 10.6um. It is a good material for CO2 lens and windows.Optical PropertiesTransmission W

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Ge has high refractive index, The transmission wavelength for Monocrystal Germanium is 2-12um, it is a common infrared crystal which is widely used for infrared image system and infrared spectrograph systems. Ge has a small absorbency at 10.6um. It is a good material for CO2 lens and windows.

Optical Properties

Transmission Wavelength2000nm-12000nm
Absorptivity (1/cm)1.3*10-3 @ 3800nm 3*10-2 @ 10600nm
Thermo-optical coeffecient, dn/dT (1/k)4.08*10-4 @10600nm
Electrical resistivity5-40 Ω.cm 1-5Ω.cm >50Ω.cm

 

Refractive index range(20ºC)

Wavelength(nm)Refractive index(n)Wavelength(nm)Refractive index(n)
22004.087980004.0057
30004.045190004.0040
38004.0267106004.0028
50004.0160110004.0025
60004.0107120004.0021
70004.0079130004.0018

 

Manufacture Specifications

Diameter2-450mm
Diameter Tol.+/-0.1
Surface Quality60-40 standard
Flatness1/4 lambda
Chamfer0.25mmx45degree
Focal Length Tol.+/-1%
Coating2-14um


Big Size 130mm Monocrystal Germanium Window for Defence Military Instrument







Our Factory
Big Size 130mm Monocrystal Germanium Window for Defence Military Instrument


Testing
Big Size 130mm Monocrystal Germanium Window for Defence Military Instrument


Exhibition Show

Sunday Optics attended Laser World in Laser World in Munich,Frankfult Exhibition,SPIE every year.
Big Size 130mm Monocrystal Germanium Window for Defence Military Instrument



Related Production Line
sunday optics also manufacture high precison Lens,prism, powell lens, collimator lens, glass filter, and mirror.

Big Size 130mm Monocrystal Germanium Window for Defence Military Instrument


FAQ:
1. Are you manufacturure? can we see your factory?
    Yes. 

2. Do you have test report?
   Yes, we offer full size test report, about size, focal length, flatness, coating curve, coating plate.

3.What is your production quantity everymonth?
  It depands on the lens size and precison.

4.What is the Minimum quantity?
  1pc

5.What is your delivery time?
   samples: 10-20days

6.How should we do if the quality is not good?
  Repair or return money.


 

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