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arxiv: 1607.05003 · v1 · pith:IQXDTKX3new · submitted 2016-07-18 · 🌌 astro-ph.IM

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

classification 🌌 astro-ph.IM
keywords agpmsinfraredmasksphasethermalvortexyearsannular
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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 {\mu}m). 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.

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