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Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures

Ruane, Garreth J. and Absil, Olivier and Huby, Elsa and Mawet, Dimitri and Delacroix, Christian and Carlomagno, Brunella and Piron, Pierre and Swartzlander, Grover A. (2015) Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures. In: Techniques and Instrumentation for Detection of Exoplanets VII. Proceedings of SPIE. No.9605. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 96051I. ISBN 978-1-62841-771-5.

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We present methods for optimizing pupil and focal plane optical elements that improve the performance of vortex coronagraphs on telescopes with obstructed or segmented apertures. Phase-only and complex masks are designed for the entrance pupil, focal plane, and the plane of the Lyot stop. Optimal masks are obtained using both analytical and numerical methods. The latter makes use of an iterative error reduction algorithm to calculate "correcting" optics that mitigate unwanted diffraction from aperture obstructions. We analyze the achieved performance in terms of starlight suppression, contrast, off-axis image quality, and chromatic dependence. Manufacturing considerations and sensitivity to aberrations are also discussed. This work provides a path to joint optimization of multiple coronagraph planes to maximize sensitivity to exoplanets and other faint companions.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Ruane, Garreth J.0000-0003-4769-1665
Absil, Olivier0000-0002-4006-6237
Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2015 SPIE. This work has benefited from computing assistance from Carlos Gomez Gonzalez (Université de Liège, Belgium) as well as fruitful discussions with Prof. Jean Surdej (Université de Liège, Belgium) and Prof. Matt Kenworthy (Leiden Observatory, Netherlands). G. J. Ruane was supported by Wallonie-Bruxelles International's (Belgium) Scholarship for Excellence and the U.S. National Science Foundation under Grant No. ECCS-1309517. The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (ERC Grant Agreement n. 337569) and from the French Community of Belgium through an ARC grant for Concerted Research Action.
Funding AgencyGrant Number
Wallonie-Bruxelles International's Scholarship for ExcellenceUNSPECIFIED
European Research Council (ERC)337569
Communauté française de Belgique – Actions de recherche concertéesUNSPECIFIED
Subject Keywords:High contrast imaging, instrumentation, exoplanets, direct detection, coronagraphs
Series Name:Proceedings of SPIE
Issue or Number:9605
Record Number:CaltechAUTHORS:20160104-151248079
Persistent URL:
Official Citation:Garreth J. Ruane ; Olivier Absil ; Elsa Huby ; Dimitri Mawet ; Christian Delacroix ; Brunella Carlomagno ; Pierre Piron and Grover A. Swartzlander " Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures ", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96051I (September 11, 2015); doi:10.1117/12.2187236;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63347
Deposited On:04 Jan 2016 23:51
Last Modified:10 Nov 2021 23:15

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