Active multi-aperture imaging through turbulence

Nicholas J. Miller; Jeffrey J. Widiker; Paul F. McManamon; Joseph W. Haus

doi:10.1117/12.921160

15 May 2012 Active multi-aperture imaging through turbulence

Nicholas J. Miller, Jeffrey J. Widiker, Paul F. McManamon, Joseph W. Haus

Proceedings Volume 8395, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXVI; 839504 (2012) https://doi.org/10.1117/12.921160
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

We describe our Innovative Multi Aperture Gimbaless Electro-Optical (IMAGE) testbed which uses coherent detection of the complex field reflected off a diffuse target with seven hexagonally arranged apertures. The seven measured optical fields are then phased with a digital optimization algorithm to synthesize a composite image whose angular resolution exceeds that of a single aperture. This same post-detection phasing algorithm also corrects aberrations induced by imperfect optics and a turbulent atmospheric path. We present the coherent imaging sub-aperture design used in the IMAGE array as well as the design of a compact range used to perform scaled tests of the IMAGE array. We present some experimental results of imaging diffuse targets in the compact range with two phase screens which simulates a ~7[Km] propagation path through distributed atmospheric turbulence.

Citation Download Citation

Nicholas J. Miller, Jeffrey J. Widiker, Paul F. McManamon, and Joseph W. Haus "Active multi-aperture imaging through turbulence", Proc. SPIE 8395, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXVI, 839504 (15 May 2012); https://doi.org/10.1117/12.921160

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