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The multistage and ring-apodized vortex coronagraph: two simple, small-angle coronagraphic solutions for heavily obscured apertures

Mawet, Dimitri and Pueyo, Laurent and Carlotti, Alexis and Mennesson, Bertrand and Serabyn, Eugene and Wallace, James and Baudoz, Pierre (2013) The multistage and ring-apodized vortex coronagraph: two simple, small-angle coronagraphic solutions for heavily obscured apertures. In: Techniques and Instrumentation for Detection of Exoplanets VI. Proceedings of SPIE. No.8864. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 886411. ISBN 9780819497147. https://resolver.caltech.edu/CaltechAUTHORS:20180618-151123843

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Abstract

Here we present two simple concepts to make the vortex coronagraph (VC) immune to heavily obscured apertures. The multi-stage VC (MSVC) uses the ability of the vortex to move light in and out of apertures through multiple VC in series to restore the nominal attenuation capability of the charge 2 vortex regardless of the aperture obscurations. The ring-apodized VC (RAVC) is a one-stage apodizer exploiting the VC Lyot-plane amplitude distribution in order to perfectly null the diffraction from any central obscuration size, and for any vortex topological charge. In this paper, we also emphasize the complementarity and similarities of the RAVC to the recently proposed Active Compensation of Aperture Discontinuities (ACAD, L. Pueyo et al. 2013, these proceedings) and more finely optimized shaped-pupil-like apodizations (A. Carlotti et al. 2013, these proceedings). This paper ends with a brief discussion about the trade-offs these techniques offer in the framework of the Extremely Large Telescopes (ELT) and the Astrophysics Focused Telescope Assets (AFTA).


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2025574DOIArticle
ORCID:
AuthorORCID
Mawet, Dimitri0000-0002-8895-4735
Pueyo, Laurent0000-0003-3818-408X
Mennesson, Bertrand0000-0003-4205-4800
Additional Information:© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile).
Subject Keywords:High contrast imaging, vortex coronagraphy, on-axis telescopes, apodization, AFTA telescope, Extremely Large Telescopes
Series Name:Proceedings of SPIE
Issue or Number:8864
DOI:10.1117/12.2025574
Record Number:CaltechAUTHORS:20180618-151123843
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180618-151123843
Official Citation:Dimitri Mawet, Laurent Pueyo, Alexis Carlotti, Bertrand Mennesson, Eugene Serabyn, James Wallace, Pierre Baudoz, "The multistage and ring-apodized vortex coronagraph: two simple, small-angle coronagraphic solutions for heavily obscured apertures", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 886411 (26 September 2013); doi: 10.1117/12.2025574; https://doi.org/10.1117/12.2025574
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87203
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:18 Jun 2018 22:20
Last Modified:15 Nov 2021 20:46

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