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Proceedings Paper

An adaptive coded aperture imager: building, testing and trialing a super-resolving terrestrial demonstrator
Author(s): Christopher W. Slinger; Charlotte R. Bennett; Gavin Dyer; Kevin Gilholm; Neil Gordon; David Huckridge; Mark McNie; Richard W. Penney; Ian K. Proudler; Kevin Rice; Kevin D. Ridley; Lee Russell; Geoffrey D. de Villiers; Philip J. Watson
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Paper Abstract

There is an increasingly important requirement for day and night, wide field of view imaging and tracking for both imaging and sensing applications. Applications include military, security and remote sensing. We describe the development of a proof of concept demonstrator of an adaptive coded-aperture imager operating in the mid-wave infrared to address these requirements. This consists of a coded-aperture mask, a set of optics and a 4k x 4k focal plane array (FPA). This system can produce images with a resolution better than that achieved by the detector pixel itself (i.e. superresolution) by combining multiple frames of data recorded with different coded-aperture mask patterns. This superresolution capability has been demonstrated both in the laboratory and in imaging of real-world scenes, the highest resolution achieved being ½ the FPA pixel pitch. The resolution for this configuration is currently limited by vibration and theoretically ¼ pixel pitch should be possible. Comparisons have been made between conventional and ACAI solutions to these requirements and show significant advantages in size, weight and cost for the ACAI approach.

Paper Details

Date Published: 8 September 2011
PDF: 14 pages
Proc. SPIE 8165, Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems, 816511 (8 September 2011); doi: 10.1117/12.895435
Show Author Affiliations
Christopher W. Slinger, Malvern Innovations Ltd. (United Kingdom)
Charlotte R. Bennett, QinetiQ Ltd. (United Kingdom)
Gavin Dyer, Goodrich Corp. (United States)
Kevin Gilholm, QinetiQ Ltd. (United Kingdom)
Neil Gordon, Malvern Innovations Ltd. (United Kingdom)
David Huckridge, Malvern Innovations Ltd. (United Kingdom)
Mark McNie, QinetiQ Ltd. (United Kingdom)
Richard W. Penney, QinetiQ Ltd. (United Kingdom)
Ian K. Proudler, Malvern Innovations Ltd. (United Kingdom)
Kevin Rice, Goodrich Corp. (United States)
Kevin D. Ridley, Malvern Innovations Ltd. (United Kingdom)
Lee Russell, QinetiQ Ltd. (United Kingdom)
Geoffrey D. de Villiers, Malvern Innovations Ltd. (United Kingdom)
Philip J. Watson, QinetiQ Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 8165:
Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems
Stanley Rogers; Jean J. Dolne; David P. Casasent; Thomas J. Karr; Victor L. Gamiz, Editor(s)

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