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Germanium windows used as transparent barriers for sending and receiving light between two phases under varying conditions in temperature, pressure, chemical composition, cleanliness, and phase.
Germanium transmits in the IR range, from 1.8µm to 23µm,at which Germanium offers higher internal transmittance. Moreover, IR transmitting materials are generally much more expensive than their visible light counterparts so it is very important to select the right material for each specific application.
Non-coated and AR coated products are available.
 Standard Specifications:
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Optical Material:
Diameter Tolerance:
Thickness Tolerance:
Clear Aperture:
Parallelism:
Surface Quality:
Wavefront Distortion:
Bevel:
Coating: |
Optical Grade Germanium
+0.0, -0.1mm
± 0.2mm
>90%
<3 are minutes
see the able
see the table
<0.25mm X 45°
available upon request |
Standard Ge Windows
Dia(mm) |
Thickness(mm) |
Wavefront Distortion |
Surface Quality |
Product Number |
10.0 |
2.0 |
Lambda/4 |
40-20 |
UQT-WNGH0101 |
12.7 |
2.0 |
Lambda/4 |
40-20 |
UQT-WNGH0102 |
18.0 |
2.0 |
Lambda/4 |
40-20 |
UQT-WNGH0103 |
25.4 |
3.0 |
Lambda/4 |
40-20 |
UQT-WNGH0104 |
38.10 |
3.0 |
Lambda/2 |
40-20 |
UQT-WNGH0105 |
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| Please Contact ultiQuest for other dimensions in prototype and production quantities. |
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| NOTES! |
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Germaium is susceptible to thermal runaway, being non-transmissive at 200°C. |
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Be sure to wear laser safety goggles when checking optical path and adjusting optical axis. |
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