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

Ruane, Garreth; Absil, Olivier; Huby, Elsa; Mawet, Dimitri; Delacroix, Christian; Carlomagno, Brunella; Piron, Pierre; Swartzlander, Grover A.

doi:10.1117/12.2187236

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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.

2015 • In Shaklan, Stuart (Ed.) Techniques and Instrumentation for Detection of Exoplanets VII

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https://hdl.handle.net/2268/187280

DOI
10.1117/12.2187236

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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 :

Additional URL :

http://adsabs.harvard.edu/abs/2015arXiv150905794R

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

Available on ORBi :

since 26 October 2015

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