The fabricated reflective focal plane mask is made of 499 hexagons, and the characteristic size of the mask features is 25 μm, with depths ranging over ☐.4 μm. Our PIAACMC design offers an inner working angle of 1.3 λ/ D and is optimized for a 30% telescope-central-obscuration ratio including six secondary support structures (ESO/ELT design). We report on the numerical design, specifications, manufacturing, and characterization of a PIAACMC complex focal plane mask for the segmented pupil experiment for exoplanet detection facility. We aim to demonstrate that the complex focal plane mask of a PIAACMC with a small inner working angle can be designed and manufactured for segmented apertures. The mask requires micro-fabrication techniques because it is generally made of hundreds micron-scale hexagonal zones with depths ranging over a few microns. The complex focal plane mask of the PIAACMC is a multi-zone, phase-shifting mask comprised of tiled hexagons that vary in depth. In this context, the phase-induced amplitude apodization complex mask coronagraph (PIAACMC) is a promising concept for high-efficiency coronagraphic imaging at small angular separations with segmented telescopes.Īims. Future extremely large telescopes (ELTs) equipped with high-contrast instruments operating as close as possible to the diffraction limit will open a bulk of targets in the habitable zone around M-stars. High-contrast imaging of exoplanets around nearby stars with future large-segmented apertures requires starlight suppression systems optimized for complex aperture geometries. Cherry Ave., Tucson, AZ 85719, USAĬontext. University of Arizona, Steward Observatory, 933 N. Silios Technologies, Rue Gaston Imbert prolonge, ZI de Peynier-Rousset, 13790 Peynier, FranceĬentre National d’Etudes Spatiales, 18 avenue Edouard Belin, 31401 Toulouse cedex 9, France National Astronomical Observatory of Japan, Subaru Telescope, National Institutes of Natural Sciences, Hilo, HI 96720, USAĪix Marseille Univ., CNRS, CNES, LAM, Marseille, France Steward Observatory, University of Arizona, Tucson, AZ 85721, USA Université Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange, Nice, FranceĮ-mail: Center, National Institutes of Natural Sciences, 2-21-1, Osawa, Mitaka, Tokyo, Japan Astronomical objects: linking to databases.
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