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Focal Plane Wavefront Sensing on SUBARU/SCExAO

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arxiv 2012.12417 v1 pith:TRTNMOMI submitted 2020-12-22 astro-ph.IM

Sebastien Vievard , Steven P. Bos , Frederic Cassaing , Thayne Currie , Vincent Deo , Olivier Guyon , Nemanja Jovanovic , Christoph Keller
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Masen Lamb Coline Lopez Julien Lozi Frantz Martinache Kelsey Miller Aurelie Montmerle-Bonnefois Laurent M. Mugnier Mamadou N'Diaye Barnaby Norris Ananya Sahoo Jean-François Sauvage Nour Skaf Frans Snik Michael J. Wilby Alisson Wong
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keywords wavefrontsensingaberrationsfocalplaneadaptivedetectorextreme
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Focal plane wavefront sensing is an elegant solution for wavefront sensing since near-focal images of any source taken by a detector show distortions in the presence of aberrations. Non-Common Path Aberrations and the Low Wind Effect both have the ability to limit the achievable contrast of the finest coronagraphs coupled with the best extreme adaptive optics systems. To correct for these aberrations, the Subaru Coronagraphic Extreme Adaptive Optics instrument hosts many focal plane wavefront sensors using detectors as close to the science detector as possible. We present seven of them and compare their implementation and efficiency on SCExAO. This work will be critical for wavefront sensing on next generation of extremely large telescopes that might present similar limitations.

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Cited by 1 Pith paper

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  1. FIRST-PL: Commissioning the first visible photonic lantern spectrograph for sub-diffraction-limit astronomy on Subaru/SCExAO

    astro-ph.IM 2026-08 conditional novelty 4.0 of 10

    A commissioned photonic lantern spectrograph on Subaru/SCExAO reaches 35-50 microarcsecond spectro-astrometric precision, recovering stellar spin axes and disk structure below the diffraction limit.

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