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A detailed analysis of anisotropy in the point spread function (PSF) associated with off-axis adaptive astronomicalcorrection is presented. The results obtained are based on the experimental C profile which has been recentlymeasured at San Pedro Martir observatory (Mexico). it is found that the PSF has a complicated shape that dependsstrongly on the wavelength and on the separation between the guide and observed stars.Keywords: Atmospheric Turbulence, Adaptive Optics High Angular Resolution Techniques, Telescopes 1 . INTRODUCTION It has been found recently both experimentally' and theoretically2 as well that the point spread function (PSF)associated with off-axis adaptive correction is anisotropic. This effect can induce quite strong distortions in wide-field images obtained with astronomical adaptive systems, so one needs to use some post-processing technics forthe image restoration. However in order to perform a successive image restoration, it is desirable to know the PSF |
