Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf...31c&link_type=abstract
SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July
Astronomy and Astrophysics
Astrophysics
Scientific paper
Adaptive optics (AO) provides a real time correction of turbulence and allows to improve the angular resolution of the astronomical telescopes. The design of AO systems and of its key components (deformable mirror (DM), wave-front sensors...) is very important to provide the best performance. The definition rules are well known for 10m class telescopes. However the study of the next generation of telescopes, especially the Extremely Large Telescope (ELT), associated with the development of new technological solutions, particularly concerning DMs, require to refine and in some cases to reconsider these rules. Both turbulent parameters (seeing, outer scale ...), telescope effects, system design and performance requirements have to be considered in order to define the DM key parameters (stroke, inter-actuator stroke, influence function ...). We present a study based on the combination of analytical expressions and numerical simulation results. We do not give absolute rules of design but we present key aspects to keep in mind when designing the DM.
Conan Jean-Marc
Costille Anne
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