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Proceedings Paper

Second-order statistics of astronomical speckle pattern used for image reconstruction
Author(s): Claude Aime; Eric Aristidi; Henri Lanteri; Gilbert Ricort
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Paper Abstract

We report in this Communication the current progress in development at the Nice University of the technique of Probability Imaging based on a complete statistical analysis of the speckle pattern observed at the focus of a large telescope. The technique, which was first proposed for the imaging of double and multiple stars, is here generalized to the image reconstruction of any general extended astronomical object. Making use of a technique of orthonormal expansion currently employed in statistical optics, a mathematical expression for the characteristic function of any order of the speckle pattern is given as the inverse of the determinant of a matrix whose elements are defined by the spatial correlation function of the amplitude of the point source speckle pattern and a diagonal matrix representing the astronomical object. Recent results obtained for the bright infrared double star ? Aqr and simulations of the implementation of the algorithm for optical photon-counting detectors with clipping problems are given. The use of the technique for synthesized apertures is also considered.

Paper Details

Date Published: 1 November 1990
PDF: 12 pages
Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); doi: 10.1117/12.23688
Show Author Affiliations
Claude Aime, Univ. de Nice (France)
Eric Aristidi, Univ. de Nice (France)
Henri Lanteri, Univ. de Nice (France)
Gilbert Ricort, Univ. de Nice (France)

Published in SPIE Proceedings Vol. 1351:
Digital Image Synthesis and Inverse Optics
Arthur F. Gmitro; Paul S. Idell; Ivan J. LaHaie, Editor(s)

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