27 June 1996 Infrared line scanner that digitally corrects for bow-tie distortions
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Abstract
This paper describes the infrared line scanner (IRLS) developed by Loral Infrared & Imaging Systems for the Advanced Tactical Air Reconnaissance System (ATARS). Features include very wide fields of view, up to 140 degrees in wide mode; high resolution in the 8 - 14 micrometer band; and the ability to collect contiguous ground imagery at velocity to height (V/H) ratios of up to 5 rad per second. In real terms, a V/H ratio of five equates to an aircraft altitude of 200 feet at speeds approaching Mach 1. The ATARS IRLS is an evolution of the AN/AAD-5 and D-500 line scanners that provides several key improvements over its predecessors. Imagery is exported in digital format allowing for real time imagery exploitation. Additionally, by using some novel system approaches that combined the elements of receiver optics, detector geometry, and electronic signal processing, output data rates were held at tolerable levels. The combination of these techniques results in a system that is optimized for best ground area coverage with a minimum number of detector channels. As a consequence the bow-tie effect at the edges of the field of view has been virtually eliminated while simultaneously reducing data storage requirements.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Raymond J. Silva, William Shaw, Kurt Nordhaus, "Infrared line scanner that digitally corrects for bow-tie distortions", Proc. SPIE 2744, Infrared Technology and Applications XXII, (27 June 1996); doi: 10.1117/12.243467; https://doi.org/10.1117/12.243467
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