Fast phase diversity wavefront sensing for mirror control

Mats G. Lofdahl; Alan L. Duncan; Goran B. Scharmer

doi:10.1117/12.321703

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11 September 1998 Fast phase diversity wavefront sensing for mirror control

Mats G. Lofdahl, Alan L. Duncan, Goran B. Scharmer

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Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321703
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

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.

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Mats G. Lofdahl, Alan L. Duncan, and Goran B. Scharmer "Fast phase diversity wavefront sensing for mirror control", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); https://doi.org/10.1117/12.321703

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