Adaptive optics on a 3.6-m telescope : results and performance
1991; EDP Sciences; Volume: 250; Issue: 1 Linguagem: Inglês
ISSN
1432-0746
AutoresF. Rigaut, G. Rousset, P. Kern, J. C. Fontanella, Jean-Paul Gaffard, Fritz Merkle, Pierre Léna,
Tópico(s)Optical Systems and Laser Technology
ResumoThe results of the first observations made on a large (3.6-m) telescope with the adaptive optics prototype, named COME-ON, conceived to explore the application of this technique for the European Very Large Telescope, are presented. The wavefront is studied, after its correction by the servo-system, using a Zernike polynomial expansion. The analysis of uncorrected and corrected images in the near infrared (≤5 μm) leads to a detailed evaluation of the system performance in terms of improvement of angular resolution, reaching nearly the ideal diffraction profiles down to 2.2 μm, and Strehl ratio, approaching 0.6 to 0.8 at 3.8 μm
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