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Optical Engineering

Technique for simulating anisoplanatic image formation over long horizontal paths
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Paper Abstract

The presence of turbulence over horizontal imaging paths severely reduces the resolution available to imaging systems and introduces anisoplanatic distortions in the image frame. A variety of image processing techniques are being developed which can mitigate these effects, and sequences of high-fidelity images created via simulation are useful in their development. In this paper, we describe a simplification of the split-step wave propagation method that employs a series of uniformly spaced phase screens to accurately simulate turbulence effects on imaging over horizontal paths. Employing this method, a series of 1000 image frames were generated for each of three turbulence conditions. The mean squared error in intensity per pixel is also evaluated for each frame in comparison to a diffraction-limited reference. Examination of the per-frame intensity error statistics indicate these errors are log-normally distributed about a mean value that increases approximately linearly with turbulence strength.

Paper Details

Date Published: 15 May 2012
PDF: 9 pages
Opt. Eng. 51(10) 101704 doi: 10.1117/1.OE.51.10.101704
Published in: Optical Engineering Volume 51, Issue 10
Show Author Affiliations
Jeremy P. Bos, Michigan Technological Univ. (United States)
Michael C. Roggemann, Michigan Technological Univ. (United States)

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