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Nijboer-Zernike phase retrieval for high contrast imaging: Principle, on-sky demonstration with NACO, and perspectives in vector vortex coronagraphy

Riaud, P. and Mawet, D. and Magette, A. (2012) Nijboer-Zernike phase retrieval for high contrast imaging: Principle, on-sky demonstration with NACO, and perspectives in vector vortex coronagraphy. Astronomy and Astrophysics, 545 . Art. No. A150. ISSN 0004-6361. doi:10.1051/0004-6361/201219613. https://resolver.caltech.edu/CaltechAUTHORS:20150521-095300974

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Abstract

We introduce a novel phase retrieval method for astronomical applications based on the Nijboer-Zernike (NZ) theory of diffraction. We present a generalized NZ phase retrieval process that is not limited to small and symmetric aberrations and can therefore be directly applied to astronomical imaging instruments. We describe a practical demonstration of this novel method that was recently performed using data taken on-sky with NAOS-CONICA, the adaptive optics system of the Very Large Telescope. This demonstration presents the first online on-sky phase retrieval results ever obtained, and allows us to plan subsequent refinements on a well-tested basis. Among the potential refinements, and within the framework of high-contrast imaging of extra-solar planetary systems (which requires exquisite wavefront quality), we introduce an extension of the generalized NZ to the high-dynamic range case, and particularly to its use with the vector vortex coronagraph. This induces conjugated phase ramps applied to the orthogonal circular polarizations, which can be used to instantaneously retrieve the complex amplitude of the field, yielding a real-time calibration of the wavefront that does not need any other modulation such as focus or other deformable mirror probe patterns. Paper II (Riaud et al. 2012, A&A, 545, A151) presents the mathematical and practical details of the new method.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201219613DOIArticle
http://www.aanda.org/articles/aa/abs/2012/09/aa19613-12/aa19613-12.htmlPublisherArticle
ORCID:
AuthorORCID
Mawet, D.0000-0002-8895-4735
Additional Information:© 2012 ESO. Article published by EDP Sciences. Received 16 May 2012; accepted 19 July 2012. This work received the support of the University of Liège. The authors are grateful to C. Hanot (IAGL), and J. Surdej (IAGL) for the manuscript corrections. The authors wish to thank the referee Wesley Traub for useful comments and corrections. The authors also acknowledge support from the Communauté française de Belgique – Actions de recherche concertées – Académie universitaire Wallonie-Europe. This idea dates back to 2005−2006 and the first author is grateful to Sect. 17 and the CNAP French commissions for their outstanding recruitment work.
Funders:
Funding AgencyGrant Number
University of LiègeUNSPECIFIED
Communauté française de Belgique – Actions de recherche concertées – Académie universitaire Wallonie-EuropeUNSPECIFIED
Subject Keywords:instrumentation: high angular resolution; instrumentation: adaptive optics; methods: numerical; techniques: polarimetric
DOI:10.1051/0004-6361/201219613
Record Number:CaltechAUTHORS:20150521-095300974
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150521-095300974
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57735
Collection:CaltechAUTHORS
Deposited By:INVALID USER
Deposited On:21 May 2015 20:08
Last Modified:10 Nov 2021 21:54

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