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Germanium Windows

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Germanium Windows

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Germanium
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Product description
Parameters

Germanium in the application of infrared optics, is mainly used to produce the infrared optical lens and protect the IR optical window of the infrared optical lens.More than 60% of the mid-range infrared optical lens for single crystal germanium, 50% of high-end infrared optical lens for single crystal germanium, germanium materials are widely used in the infrared camera.Civil infrared camera, small and medium caliber lens single set of germanium consumption about 250 grams, large diameter is 2500 grams.

Military infrared window is mainly used in aircraft and armored fighting vehicles, especially a helicopter dosage big infrared optical lens applications include military and civilian applications, mainly used in military airborne infrared camera, ir camera, roadbed infrared lens, vehicular infrared camera, infrared gun aiming lens, helmet infrared camera, handheld infrared camera, etc.

Civil infrared window is mainly used in a variety of monitoring thermal imager, auxiliary pilot at night.Civilian areas mainly used in security, civilian vehicles, civilian ships, civilian aircraft, police, etc.

 

Basic Properties:

Gemanium (Ge)

Transmission band(μm)

1.8-23

Uniformity index

4.89×10-5(φ250mm)

Refractive index(10µm)

4.0032

Temperature coefficient of the refractive index(10-6/℃)

408

Absorption(10µm.cm-1)

0.03

Hardness(kg/cm2)

800

Density(g/cm3)

5.323

Rupture Modulus (Mpa)

75

Yang's modulus(Gpa)

103

Poisson's ratio

0.28

Melting point(℃)

937

Thermal conductivity(Wcm-1k-1)

0.7

Thermal expansion coefficient(X10-6℃C-1)

6.1

Specific Heat(Cal/g.k.)

0.074

Permittivity

16

Conductive models

N

Resistivity(Ωcm)

5-40

Maximum diameter(mm)

300

 

1

Parallelism

<3 arc minutes

2

Flatness

1/4λ-10λper inch @633nm

3

Surface quality

5-10/60-40

4

Tolerance

±0.02-±0.1

5

Chamfer

0.1-0.5*45°C

 

We could not find any corresponding parameters, please add them to the properties table
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 Luoyang Dingming Optical Technology Co.,Ltd.

Address:Hangong Road, Xigong Industrial Park, 
                   Xigong District, Luoyang HeNan,China

Email:lydm@dm-optical.com

Tel:+86-379-62110001

Fax:+86-379-62112223

 

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