Adaptive optics is a prime example of how progress in observational astronomy can be
driven by technological developments. At many observatories it is now considered to be part …

Since the year 2000, adaptive optics (AO) has seen the emergence of a variety of new
concepts addressing particular science needs; multiconjugate adaptive optics (MCAO) is …

The pyramid wavefront sensor has been introduced in the field of astronomical adaptive
optics a few years ago. An important issue characterizing this wavefront sensor is how to …

Multi-Conjugate Adaptive Optics (MCAO) is working on the principle to perform wide field of
view atmospheric turbulence correction using many Guide Stars located in and/or …

In layer-oriented adaptive optics, multiconjugation is performed in a much more efficient way
than conventional wavefront sensing. This improved efficiency is impressive for high altitude …

MAD On-Sky Results in Star Oriented Mode Page 1 MAD On-Sky Results in Star Oriented
Mode E. Marchetti1*, R. Brast1, B. Delabre1, R. Donaldson1, E. Fedrigo1, C. Frank1, N …

The pyramid wavefront sensor is a novel concept device whose features are attractive for
adaptive optics for several reasons. We show here the first loop closure of an AO system …

Laser Guide Stars are, in spite of their name, all but “stars”. They do not stand at infinite
distance, neither on a plane. If fired from the side of a large telescope their characteristics as …

The dynamic properties of a layer-oriented multi-conjugate adaptive optics system are
examined. It is shown that such a system is stable and closes the loop. A simplified analysis …

The Layer-Oriented Simulation Tool (LOST) is a numerical simulation code developed for
analysis of the performance of multiconjugate adaptive optics modules following a layer …