Fast phase diversity wavefront sensing for mirror control

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

doi:10.1117/12.321703

11 September 1998 Fast phase diversity wavefront sensing for mirror control

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

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.

Citation Download Citation

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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