What are the specifications of Barium Fluoride AR 0.8-2.5 IR Lens?

Description: An anti-reflectance coating for BaF₂ optics, providing excellent transmittance in the 0.8-2.5µm spectral band. This broadband coating covers the astronomical bands “I” through “K.”

Application: Mostly used on optics for astronomical applications.

Spectral Performance: The following spectral transmission value is based on coating both sides of a 1mm thick substrate coated with the AR 0.8-2.5.

Spectral Performance: @ 0.8-2.5µm
Transmission: 98% average
Reflection: 1% average per surface

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

Adhesion: Cellophane tape removal test.
Humidity: 95% to 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 (26°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.

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