Subaru Coronagraphic eXtreme Adaptive Optics: on-sky performance of the asymmetric pupil Fourier wavefront sensor

Frantz Martinache; Nemanja Jovanovic; Olivier Guyon

doi:10.1117/12.2233475

27 July 2016 Subaru Coronagraphic eXtreme Adaptive Optics: on-sky performance of the asymmetric pupil Fourier wavefront sensor

Frantz Martinache, Nemanja Jovanovic, Olivier Guyon

Author Affiliations +

Proceedings Volume 9909, Adaptive Optics Systems V; 990954 (2016) https://doi.org/10.1117/12.2233475
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument relies on a technique known as the asymmetric pupil Fourier wavefront sensor (APF-WFS) to compensate for the non-common path error that affects the performance of high contrast imaging instruments. The APF-WFS is a powerful tool that senses the wavefront at the level of the science detector, and leads to unbiased wavefront estimates. This paper presents the latest status, linearity properties and reports on the on-sky performance of this sensor, as it is implemented on SCExAO, used to control low-order Zernike modes in a close-loop system.

Citation Download Citation

Frantz Martinache, Nemanja Jovanovic, and Olivier Guyon "Subaru Coronagraphic eXtreme Adaptive Optics: on-sky performance of the asymmetric pupil Fourier wavefront sensor", Proc. SPIE 9909, Adaptive Optics Systems V, 990954 (27 July 2016); https://doi.org/10.1117/12.2233475

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