Fast Phase Diversity Wavefront Sensing for Mirror Control
نویسندگان
چکیده
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 realtime correction at high bandwidth for certain applications. We also present a proper maximum likelihood treatment of Shack–Hartman 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 with traditional Shack–Hartmann wavefront sensing for a given number of lenslets.
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