Adaptive optics - Dither optimization method in an adaptive optic modal control

Details Adaptive optics - Dither optimization method in an adaptive optic modal control Adaptive optics - Dither optimization method in an adaptive optic modal control

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1237..364h&link_type=abstract

IN: Amplitude and intensity spatial interferometry; Proceedings of the Meeting, Tucson, AZ, Feb. 14-16, 1990 (A91-30676 12-89).

Physics

Optics

Adaptive Optics, Atmospheric Turbulence, Modal Response, Optimization, Wave Fronts, Actuators, Algorithms, Automatic Control, Dithers, Mirrors

Scientific paper

It is noted that by adjusting the phase of individual dither frequencies, the dynamics of beatings can be optimized, and normalization effects can be limited when dealing with wavefront distortions. A method for optimizing the beating dynamics by adjusting individual dither frequencies at the output of synthetizers is proposed. Two optimization methods are employed: one using the first derivative, and the other using no derivatives. The algorithm set derived indicates that in every case the local minimum point remains a limitation. It is pointed out that the chosen solutions which are closed to the global minimum point are often sufficient for the problem.

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