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

Olivier Absil, Dimitri Mawet, Mikael Karlsson, Brunella Carlomagno, Valentin Christiaens, Denis Defrère, Christian Delacroix, Bruno Femenía Castella, Pontus Forsberg, Julien Girard, Carlos A. Gómez González, Serge Habraken, Philip M. Hinz, Elsa Huby, Aïssa Jolivet, Keith Matthews, Julien Milli, Gilles Orban De Xivry, Eric Pantin, Pierre PironMaddalena Reggiani, Garreth J. Ruane, Gene Serabyn, Jean Surdej, Konrad R.W. Tristram, Ernesto Vargas Catalán, Olivier Wertz, Peter Wizinowich

Research output: Chapter in Book/Report/Conference proceedingConference contribution

22 Scopus citations


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.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy VI
EditorsLuc Simard, Christopher J. Evans, Hideki Takami
ISBN (Electronic)9781510601956
StatePublished - 2016
EventGround-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom
Duration: Jun 26 2016Jun 30 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherGround-Based and Airborne Instrumentation for Astronomy VI
Country/TerritoryUnited Kingdom


  • Coronagraphy
  • High contrast imaging
  • Thermal infrared
  • Vortex phase mask

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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