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The VORTEX coronagraphic test bench

Jolivet, A. and Piron, P. and Huby, E. and Absil, O. and Delacroix, C. and Mawet, D. and Surdej, J. and Habraken, S. (2014) The VORTEX coronagraphic test bench. In: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation. Proceedings of SPIE. No.9151. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 91515P. ISBN 9780819496195.

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In this paper, we present the infrared coronagraphic test bench of the University of Liège named VODCA (Vortex Optical Demonstrator for Coronagraphic Applications). The goal of the bench is to assess the performances of the Annular Groove Phase Masks (AGPMs) at near- to mid-infrared wavelengths. The AGPM is a subwavelength grating vortex coronagraph of charge two (SGVC2) made out of diamond. The bench is designed to be completely achromatic and will be composed of a super continuum laser source emitting in the near to mid-infrared, several parabolas, diaphragms and an infrared camera. This way, we will be able to test the different AGPMs in the M, L, K and H bands. Eventually, the bench will also allow the computation of the incident wavefront aberrations on the coronagraph. A reflective Lyot stop will send most of the stellar light to a second camera to perform low-order wavefront sensing. This second system coupled with a deformable mirror will allow the correction of the wavefront aberrations. We also aim to test other pre- and/or post-coronagraphic concepts such as optimal apodization.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Absil, O.0000-0002-4006-6237
Mawet, D.0000-0002-8895-4735
Surdej, J.0000-0002-7005-1976
Additional Information:© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE). Date Published: 18 July 2014. 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 Actions.
Funding AgencyGrant Number
European Research Council (ERC)337569
Communauté française de Belgique – Actions de recherche concertéesUNSPECIFIED
Series Name:Proceedings of SPIE
Issue or Number:9151
Record Number:CaltechAUTHORS:20150521-101318318
Persistent URL:
Official Citation:A. Jolivet ; P. Piron ; E. Huby ; O. Absil ; C. Delacroix, et al. " The VORTEX coronagraphic test bench ", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515P (July 18, 2014); doi:10.1117/12.2055791;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57736
Deposited On:21 May 2015 20:13
Last Modified:10 Nov 2021 21:54

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