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IR Coating Information

What are the specifications of a Germanium (Ge) 8-12 D IR Lens?

Description: A high efficiency, anti-reflectance coating with excellent durability for germanium optics, providing excellent transmittance in the 8-12µm spectral band.

Application: Thermal imaging systems & FLIR systems.

Spectral Performance: The following spectral transmittance value is based on coating both sides of a 1mm thick germanium substrate with Ge 8-12d.

Spectral Performance: @ 8-12µm
Transmission: 97% average
Reflection: 1% average per surface

Theoretical Curve Ge 8-12

Environmental Performance: The coating passes the following environmental tests as specified in MIL-F-48616 & MIL-C-48497:

Adhesion: Cellophane tape removal test
Humidity: 95%–100% relative humidity @ 120°F (49°C) for a duration of 24 hours
Abrasion: Moderate (No sign of deterioration such as scratches or streaks when abraded with a dry, clean cheesecloth pad)
Temperature: -80°F to +160°F (-62°C to 71°C) for 2 hours at each temperature

The coating performance specified herein is typical of this particular coating and does not preclude adherence to other specifications on a case by case basis.

Please call (603) 757-0070 or email us with your specific requirements.

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