Estimation of the adaptive optics long-exposure point-spread function using control loop data.

Details Estimation of the adaptive optics long-exposure point-spread function using control loop data. Estimation of the adaptive optics long-exposure point-spread function using control loop data.

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997josaa..14.3057v&link_type=abstract

Journal of the Optical Society of America A, Vol. 14, No. 11, p. 3057 - 3069

Physics

Optics

18

Image Processing: Adaptive Optics

Scientific paper

Astronomical images obtained with adaptive optics systems can be enhanced by using image restoration techniques. However, this usually requires an accurate knowledge of the system point-spread function (PSF) which is variable in time. The authors present a method to estimate the PSF related to each image, using data from the adaptive optics control computer, namely, the wave-front sensor measurements and the commands to the deformable mirror, accumulated in synchronization with the acquisition. This method requires no extra observing time and has been successfully tested on PUEO, the Canada-France-Hawaii Telescope adaptive optics system. With this system, accurate PSF estimations could be achieved for guide stars of magnitude 13 or brighter.

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