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 wave-front 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.
© 2004 Optical Society of America
Markus Kasper, Enrico Fedrigo, Douglas P. Looze, Henri Bonnet, Liviu Ivanescu, and Sylvain Oberti, "Fast calibration of high-order adaptive optics systems," J. Opt. Soc. Am. A 21, 1004-1008 (2004)