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Proceedings Paper

Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics
Author(s): F. Chassat; G. Rousset; J. Primot
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Paper Abstract

Correlation functions of the Zernike-polynomial expansion coefficients of turbulence induced aberrated wavefronts are presented and experimentally confirmed using laboratory-generated Kolmogorov turbulence. These functions are convenient for characterizing the anisoplanatic error for adaptive optics. The isoplanatic patch-size of such systems is evaluable according to their specific working parameters. We find, for example, with a 4 m telescope working at 3.5 μm and sensing the wavefront phase fluctuation on 20 Zernike polynomials, an isoplanatic patch about 22 arcseconds wide.

Paper Details

Date Published: 20 September 1989
PDF: 9 pages
Proc. SPIE 1114, Active Telescope Systems, (20 September 1989); doi: 10.1117/12.960805
Show Author Affiliations
F. Chassat, Matra Espace (France)
G. Rousset, Office National d'Etudes et de Recherches Aerospatiales (ONERA) (France)
J. Primot, Office National d'Etudes et deRecherches Aerospatiales (ONERA) (France)

Published in SPIE Proceedings Vol. 1114:
Active Telescope Systems
Francois J. Roddier, Editor(s)

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