Estimating residual aberrations from images taken at the user focus of a telescope compensated by adaptive optics

Details Estimating residual aberrations from images taken at the user focus of a telescope compensated by adaptive optics Estimating residual aberrations from images taken at the user focus of a telescope compensated by adaptive optics

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2201..989v&link_type=abstract

Proc. SPIE Vol. 2201, p. 989-997, Adaptive Optics in Astronomy, Mark A. Ealey; Fritz Merkle; Eds.

Physics

Optics

Scientific paper

We present a simple procedure which estimates aberrations in the exit pupil from point source images taken at the compensated focus. The procedure is based on an iterative technique described by J. Fienup. The measured point spread function of the system produced with a reference source at the input to the adaptive optics system, and the exact, properly scaled shape of the (centrally obscured) exit pupil is all that is needed for the procedure to perform. The results can be obtained quickly, e.g., as part of a daily maintenance procedure. We present some sample cases which were produced with the Come-On Plus adaptive optics system at the ESO 3.6 m telescope on La Silla.

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