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Three years of harvest with the vector vortex coronagraph in the thermal infrared

2016; SPIE; Volume: 9908; Linguagem: Inglês

10.1117/12.2233289

1996-756X

Olivier Absil, Dimitri Mawet, Mikael Karlsson, Brunella Carlomagno, Valentin Christiaens, Denis Defrère, Christian Delacroix, Bruno Femenía Castellá, Pontus Forsberg, J. H. Girard, Carlos Gómez González, Serge Habraken, Philip M. Hinz, Elsa Huby, Aïssa Jolivet, Keith Matthews, J. Milli, Gilles Orban de Xivry, É. Pantin, Pierre Piron, Maddalena Reggiani, Garreth Ruane, G. Serabyn, Jean Surdej, K. R. W. Tristram, Ernesto Vargas Catalán, O. Wertz, Peter Wizinowich,

Solar Thermal and Photovoltaic Systems

For several years, we have been developing vortex phase masks based on sub-wavelength gratings, known as Annular Groove Phase Masks. Etched onto diamond substrates, these AGPMs are currently designed to be used in the thermal infrared (ranging from 3 to 13 μm). Our AGPMs were first installed on VLT/NACO and VLT/VISIR in 2012, followed by LBT/LMIRCam in 2013 and Keck/NIRC2 in 2015. In this paper, we review the development, commissioning, on-sky performance, and early scientific results of these new coronagraphic modes and report on the lessons learned. We conclude with perspectives for future developments and applications.