Fast calibration of high-order adaptive optics systems.
We present a new method of calibrating adaptive optics systems that greatly reduces the required calibration time or, equivalently, improves the signal-to-noise ratio. The method uses an optimized actuation scheme with Hadamard patterns and does not scale with the number of actuators for a given noise level in the wavefront sensor channels. It is therefore highly desirable for high-order systems and/or adaptive secondary systems on a telescope without a Gregorian focal plane. In the latter case, the measurement noise is increased by the effects of the turbulent atmosphere when one is calibrating on a natural guide star.
Kasper
Markus
M
European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany.
Fedrigo
Enrico
E
Looze
Douglas P
DP
Bonnet
Henri
H
Ivanescu
Liviu
L
Oberti
Sylvain
S