8 September 2011 An adaptive coded aperture imager: building, testing and trialing a super-resolving terrestrial demonstrator
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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.
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Christopher W. Slinger, Christopher W. Slinger, Charlotte R. Bennett, Charlotte R. Bennett, Gavin Dyer, Gavin Dyer, Kevin Gilholm, Kevin Gilholm, Neil Gordon, Neil Gordon, David Huckridge, David Huckridge, Mark McNie, Mark McNie, Richard W. Penney, Richard W. Penney, Ian K. Proudler, Ian K. Proudler, Kevin Rice, Kevin Rice, Kevin D. Ridley, Kevin D. Ridley, Lee Russell, Lee Russell, Geoffrey D. de Villiers, Geoffrey D. de Villiers, Philip J. Watson, Philip J. Watson, } "An adaptive coded aperture imager: building, testing and trialing a super-resolving terrestrial demonstrator", 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; https://doi.org/10.1117/12.895435

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