Fast calibration of high-order adaptive optics systems

Details Fast calibration of high-order adaptive optics systems Fast calibration of high-order adaptive optics systems

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004josaa..21.1004k&link_type=abstract

Optical Society of America Journal, Volume 21, Issue 6, pp. 1004-1008 (2004).

Physics

Optics

Adaptive Optics, Calibration, Wavefront Sensors, Hadamard Matrices, Noise Measurement, Atmospheric Turbulence, Focal Planes, Optimisation, Actuators, Telescopes

Scientific paper

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.

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