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IR Windows Germanium Windows

Germanium Windows are applied for IR Wavelength
1. 3 - 5μm for mid-infrared applications
2. 3 - 12μm for broadband multispectral applications
3. 8 - 12μm for thermal imaging applications

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IR Windows Germanium Windows

Germanium is the preferred lens and window material for high performance infrared imaging systems in the 8-12 um wavelength band. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface curvature. Chromatic aberration is small, often eliminating the need for correction.

Germanium is most widely used for lenses and windows in IR systems operating in the 2 um - 12 um range. Its transmission is very temperature sensitive, becoming opaque near 100°C. Environment does not cause problems because Germanium is inert, mechanically rugged, and fairly hard.

Germanium is a high index material that is used to manufacture Attenuated Total reflection (ATR) prisms for spectroscopy. Its refractive index is such that germanium makes an effective natural 50% beamsplitter without the need for coatings. It is also used extensively as a substrate for production of optical filters. Germanium covers the whole of the 8-14 micron thermal band and is used in lens systems for thermal imaging.

It can be AR coated with diamond producing an extremely tough front optic(DLC Coating).
Application as Germanium window, Germanium lens, Germanium beamsplitter, ATR prism or filter in spectrometers and in thermal imaging.

Germanium Windows SPECIFICATION:

Material: Germanium(Ge)
Dimension Tolerance: +0.0, -0.1mm
Thickness Tolerance: ± 0.1mm
Surface quality: 60/40
Clear Aperture: >85%
Flatness: λper 25mm
Parallelism: 3' 
Bevel: <0.25mm X 45°
Coating: AR Coated & DLC Coated


Typical Sizes:
Round Shape: Φ5.0; Φ10.0 ; Φ12.7; Φ15.0; Φ20.0;
Diameter(mm): Φ25.4; Φ30.0; Φ38.1; Φ50.8; Φ76.2
Square Shape: 5.0x5.0 ; 10.0x10.0 ; 15.0x15.0 ;
WxH(mm) 20.0x20.0; 25.0x25.0; 50.0x50.0
Thickness(mm):
0.5; 1.0; 1.5; 2.0; 3.0;
4.0; 5.0; 6.0; 8.0; 10.0

DLC Coated Germanium WindowsAR Coated Germanium Windows


WTS,China optical germanium windows manufacturer,provide our customers with the superior quality optics products and precision Laser Optics products ,serves a global markets including Laser, Electronics, Telecommunication,Thermal Imaging,etc.
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