Fast phase diversity wavefront sensing for mirror control

Details Fast phase diversity wavefront sensing for mirror control Fast phase diversity wavefront sensing for mirror control

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3353..952l&link_type=abstract

Proc. SPIE Vol. 3353, p. 952-963, Adaptive Optical System Technologies, Domenico Bonaccini; Robert K. Tyson; Eds.

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We show with simulation experiments that closed-loop phase- diversity can be used without numerical guard-bands for wavefront sensing of low-order wavefronts from extended objects using broad-band filters. This may allow real-time correction at high bandwidth for certain applications. We also present a proper maximum likelihood treatment of Shack- Hartmann data, which includes an imaging model to extract curvature information from the lenslet images. We demonstrate by simple simulations that this approach should allow higher-order wavefront information to be extracted than with traditional Shack-Hartmann wavefront sensing for a given number of lenslets.

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