Correction of angular displacements of optical beams

One of the simplest algorithms for adaptive correction (correction of a random tilt of a wavefront) is considered in the case of a wide optical beam when a point reference source is used. An analysis is made of various algorithms for the determination of a random tilt. A calculation is made of the distribution of the average intensity of the corrected field. The results are given of an experiment carried out over a near-ground path. The problem of correlation of random tilts of a phase front and high-frequency phase fluctuations is discussed.