Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics

F. Chassat; G. Rousset; J. Primot

doi:10.1117/12.961503

26 September 1989 Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics

F. Chassat, G. Rousset, J. Primot

Proceedings Volume 1130, New Technologies for Astronomy; (1989) https://doi.org/10.1117/12.961503
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France

Abstract

Correlation functions of the Zernike-polynomial expansion coefficients of turbulence induced aberrated wavefronts are presented and experimentally confirmed using laboratory-generated Kolrnogorov 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.

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F. Chassat, G. Rousset, and J. Primot "Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics", Proc. SPIE 1130, New Technologies for Astronomy, (26 September 1989); https://doi.org/10.1117/12.961503

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