Vol. 17, issue 12, article # 7

Kanev F.Yu. Detection of singular wave front with a Hartmann sensor. Efficiency of an adaptive system with such a sensor. // Atmospheric and oceanic optics. 2004. V. 17. No. 12. P. 904-912.
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In this paper I consider the effect of two key elements of an adaptive system, namely, of a Shack-Hartmann sensor and a deformable mirror, on the efficiency of correction for the atmospheric turbulence. In particular, the wave front reconstruction with such a system has been analyzed assuming no singularities in the phase of reference radiation and the phase with dislocations. It is shown that the appearance of singular points not always leads to losses in accuracy of phase detection and stability of adaptive control in the system including a real sensor and an ideal mirror. On the other hand, the use of a real mirror with a continuous reflecting surface under such conditions leads to the loss in beam control stability.