Adaptive optics: dither optimization method in an adaptive optic modal control

Philippe Hirel; Jean-Luc Lamard

doi:10.1117/12.19310

1 August 1990 Adaptive optics: dither optimization method in an adaptive optic modal control

Philippe Hirel, Jean-Luc Lamard

Proceedings Volume 1237, Amplitude and Intensity Spatial Interferometry; (1990) https://doi.org/10.1117/12.19310
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

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.

Citation Download Citation

Philippe Hirel and Jean-Luc Lamard "Adaptive optics: dither optimization method in an adaptive optic modal control", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); https://doi.org/10.1117/12.19310

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