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Wide-Angle BBAR Coatings

Photonics.com
Jun 2011
Deposition Sciences Inc. (DSI)Request Info
 
SANTA ROSA, Calif., June 23, 2011 — Suitable for gimbal windows and sensor detector assemblies on unmanned systems, wide-angle broadband antireflection (BBAR) coatings manufactured by Deposition Sciences Inc. address the needs of unmanned aircraft systems for a durable, angle-insensitive (field of view from 0 to 30°) glare-reducing coating on sapphire substrates.

The design is band-selective so that minimum reflectance can be tuned to a particular detector package while still minimizing visibility (glare) in the photopic spectral sensitivity range of the human eye. The design delivers an average reflectance of ~2% between 400 and 5000 nm.

Consistent with the harsh operating environments of unmanned aircraft systems, the coatings are environmentally stable and perform to MIL-C-48497 and MIL-F-48616 standards. Testing is performed on the coated windows according to specifications for humidity, salt fog, abrasion, temperature cycle, adhesion, solubility and cleanability.

The company's in-house testing facility ensures that cryogenic and operating temperature measurements can be made between 10 and 400 K.


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