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Proceedings Paper

Fast phase diversity wavefront sensing for mirror control
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Paper Abstract

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.

Paper Details

Date Published: 11 September 1998
PDF: 12 pages
Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); doi: 10.1117/12.321703
Show Author Affiliations
Mats G. Lofdahl, Lockheed Martin Missiles & Space (Sweden)
Alan L. Duncan, Lockheed Martin Missiles & Space (United States)
Goran B. Scharmer, Stockholm Observatory (Sweden)


Published in SPIE Proceedings Vol. 3353:
Adaptive Optical System Technologies
Domenico Bonaccini; Robert K. Tyson, Editor(s)

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