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Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures
Ruane, Garreth; Absil, Olivier; Huby, Elsa et al.
2015In Shaklan, Stuart (Ed.) Techniques and Instrumentation for Detection of Exoplanets VII
 

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Keywords :
High contrast imaging; instrumentation; exoplanets; direct detection; coronagraphs
Abstract :
[en] 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.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ruane, Garreth
Absil, Olivier  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Huby, Elsa ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Mawet, Dimitri
Delacroix, Christian  ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Carlomagno, Brunella ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Piron, Pierre ;  Université de Liège > Département de physique > Optique - Hololab
Swartzlander, Grover A.
Language :
English
Title :
Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures
Publication date :
11 September 2015
Event name :
Optics + Photonics 2015
Event organizer :
SPIE
Event place :
San Diego, United States - California
Event date :
9 - 13 August 2015
Audience :
International
Main work title :
Techniques and Instrumentation for Detection of Exoplanets VII
Author, co-author :
Shaklan, Stuart
Publisher :
SPIE, Bellingham, United States - Washington
ISBN/EAN :
9781628417715
Collection name :
Proceedings of SPIE, volume 9605
Pages :
1I
European Projects :
FP7 - 337569 - VORTEX - Taking extrasolar planet imaging to a new level with vector vortex coronagraphy
Name of the research project :
VORTEX
Funders :
CE - Commission Européenne [BE]
Available on ORBi :
since 26 October 2015

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