Investigation of the Iterative Algorithm of Processing of Measurements of Wave Front Sensors of the Hartmann Type

摘要

The convergence of an iterative algorithm of phase recovery from the gradient measured is studied by the method of numerical simulation. The algorithm is used in the processing of measurements of wave front sensors of the Hartmann type in adaptive optical systems of phase conjugation. The algorithm is found to have a stable convergence even for small signal-to-noise ratios. From 10 to 20 iterations of calculations are needed to recover phase shifts at discrete points of a wave front. Therefore, the response of an adaptive circuit determining the time of a single iteration of calculations should be at least an order of magnitude faster than the phase fluctuation frequency.