Adaptive optics: a method for real-time optimization of the loop gains in AO systems

Details Adaptive optics: a method for real-time optimization of the loop gains in AO systems Adaptive optics: a method for real-time optimization of the loop gains in AO systems

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2201..899g&link_type=abstract

Proc. SPIE Vol. 2201, p. 899-909, Adaptive Optics in Astronomy, Mark A. Ealey; Fritz Merkle; Eds.

Physics

Optics

Scientific paper

The problem to be solved is to maintain the best efficiency of an Adaptive Optics System (AOS) during an observing run, versus different seeing conditions and star magnitudes. The paper uses the modal control and partial correction concepts as defined in previous works. It has been demonstrated in these works that the Strehl ratio of images corrected by an AOS can be evaluated by a simple criteria. Such a criteria uses only the temporal covariance of the controls applied to the AO mirror. Using these different results a method to optimize the loop gains is suggested. This method can be applied during real time run of the AOS. It uses the only knowledge of the modal control values applied to the AO mirror and the knowledge of the residual wavefront errors as measured by the wavefront sensor.

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