Effect of anisotropic imaging in off-axis adaptive astronomical systems

Effect of anisotropic imaging arising due to the off-axis adaptive correcti on is considered. The main manifestation of this effect is that the isophot es of the image of a star separated by some angular distance from the guide one have a non-circular form. It is shown that the effect of interest depe nds strongly on the observation conditions, and under certain conditions th e image width in direction towards the guide star can be up to two times wi der than in the transversal one. The results obtained can be used in practi ce for the reconstruction or calibration of images obtained after the off-a xis adaptive correction.