Theoretical and experimental evaluation of isoplanatic patch size for adaptive optics.

Details Theoretical and experimental evaluation of isoplanatic patch size for adaptive optics. Theoretical and experimental evaluation of isoplanatic patch size for adaptive optics.

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1114...14c&link_type=abstract

Conference on Active Telescope Systems, p. 14 - 22

Physics

Optics

3

Earth Atmosphere: Turbulence, Adaptive Optics

Scientific paper

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. The authors 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″wide.

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