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Proceedings Paper

Turbulence effect mitigation using adaptive optics post-processing of holographically recorded short-exposure images
Author(s): Mikhail A. Vorontsov; Mathieu Aubailly; Rensheng Dou
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Paper Abstract

We present a post-processing technique for mitigating the effect of turbulence on holographically recorded short-exposure images that consists of the two following sequential steps. First, the coherent field scattered from the viewed object propagates through a turbulence layer and is used to record a short-exposure Fourier hologram by interference with a know reference beam. Information about the instantaneous distorted optical field is hence stored permanently in the hologram. Secondly, the recorded hologram is read a posteriori using the reference beam with its wavefront modulated using adaptive optics. The resulting intensity image is used to compute a sharpness metric. Optimization of the metric is performed using a stochastic parallel gradient descent (SPGD) algorithm. Experimental and numerical results show an improvement of the image quality after convergence of the SPGD algorithm.

Paper Details

Date Published: 25 September 2007
PDF: 6 pages
Proc. SPIE 6708, Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation, 67080A (25 September 2007); doi: 10.1117/12.735949
Show Author Affiliations
Mikhail A. Vorontsov, Univ. of Maryland, College Park (United States)
Army Research Lab. (United States)
Mathieu Aubailly, Univ. of Maryland, College Park (United States)
Rensheng Dou, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 6708:
Atmospheric Optics: Models, Measurements, and Target-in-the-Loop Propagation
Stephen M. Hammel; Alexander M. J. van Eijk; Michael T. Valley; Mikhail A. Vorontsov, Editor(s)

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