Translator Disclaimer
18 July 2014 The VORTEX coronagraphic test bench
Author Affiliations +
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.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Jolivet, P. Piron, E. Huby, O. Absil, C. Delacroix, D. Mawet, J. Surdej, and S. Habraken "The VORTEX coronagraphic test bench", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91515P (18 July 2014);


Ground And Aerial Use Of An Infrared Video Camera With...
Proceedings of SPIE (August 05 1986)
Analysis of scattered light for VISTA
Proceedings of SPIE (January 30 2003)
Visible and Infrared Survey Telescope for Astronomy: overview
Proceedings of SPIE (December 24 2002)
Ground-based camera experience with NICMOS arrays
Proceedings of SPIE (October 20 1993)

Back to Top