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VERSION:2.0
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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20091116T000000
DTEND;TZID=Atlantic/Canary:20091116T010000
UID:iactalks-115
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/115
CREATED:2009-11-16T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Inverse problem approach in adaptive optics for the European-ELT
DESCRIPTION:Inverse problem approach in adaptive optics for the European-EL
 T\nDr. Clementine Bechet\n\nThe ambitious astrophysical objectives of the 
 Extremely Large Telescopes (ELTs) will be achievable only with innovative 
 Adaptive Optics (AO) systems to correct for the wavefront distortions indu
 ced by the turbulence in the atmosphere. One of the key components of an A
 O system is the wavefront reconstruction, which is a real-time estimate of
  the wavefront distortions above the telescope aperture from data. This re
 construction can be described by an inverse problem approach (IPA),taking 
 advantage of the modeling of second-order statistics of both turbulence an
 d data noise.\n \nFirst, the benefits of the IPA to wavefront reconstructi
 on is enhanced for two particularities of the ELTs: very high number of es
 timated parameters  (~104) and elongated spots on the sensor for AO using 
 Laser Guide Stars. Moreover, this IPA can be implemented with a fast algor
 ithm for high number of degrees of freedom, which makes it a candidate for
  the implementation on a future AO system of the E-ELT. The correction per
 formance in closed-loop AO has also been assessed thanks to end-to-end sim
 ulations of single-conjugate AO and Ground-Layer AO with Laser Guide Stars
  on the E-ELT. 
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