Coronagraphy / adaptive optics

Today, as a result of more than 12+ years of sustained efforts across several continents, the vortex coronagraph is the most advanced coronagraph in operations, opening a new parameter space at small angular separations. It is available in the infrared at most major 8-meter class telescopes (Palomar, VLT, LBT, Subaru, and Keck), and has demonstrated visible raw contrast levels of 5 ppb at JPL, already sufficient to image exo-Earth after post-processing. The vortex is thus a strong candidate for exoplanet imager instruments for future extremely large telescopes (ELT) and space-based missions (e.g. probe-scale Exo-C).

Left: vector vortex coronagraph between crossed polarizers. Right: dark hole images obtained with the vortex and electric field conjugation wavefront control on the high contrast imaging testbed at JPL (Mawet et al. 2012).

Co-Investigators vortex coronagraphy: E. Serabyn (JPL/Caltech), G. Ruane (Caltech), S. Shaklan (JPL/Caltech), L. Pueyo (STScI), J. Mazoyer (STScI), K. Fogarty (JHU), O. Absil (ULg), B. Carlomagno (ULg), C. Delacroix (Cornell),  S. Habraken (ULg), E. Huby (ULg), A. Jolivet (ULg),  G. Singh (JPL/Caltech), J. Surdej (ULg) 

Co-investigator adaptive optics: R. Dekany (Caltech Optical Observatories), R. Riddle (COO), J.K. Wallace (JPL/Caltech), P. Wizinowich (WMKO), M. Chun (UH), O. Guyon (Subaru, UoA), F. Rigault (ANU) 

© Dimitri Mawet 2017