20 September 1989 Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics
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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.
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F. Chassat, F. Chassat, G. Rousset, G. Rousset, J. Primot, J. Primot, "Theoretical And Experimental Evaluation Of Isoplanatic Patch Size For Adaptive Optics", Proc. SPIE 1114, Active Telescope Systems, (20 September 1989); doi: 10.1117/12.960805; https://doi.org/10.1117/12.960805
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