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6 October 2023 Broadband performance of the PAPLC coronagraph on the HiCAT testbed
Emiel H. Por, Raphaël Pourcelot, Ananya Sahoo, Meiji M. Nguyen, Bryony F. Nickson, Alex Klein, Peter Petrone, Iva Laginja, Laurent Pueyo, Rémi Soummer
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Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126801D (2023) https://doi.org/10.1117/12.2677757
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
The phase-apodized-pupil Lyot coronagraph (PAPLC) produces a one-sided dark zone, with, in theory, a 2 λ/D inner working angle at contrasts of 10^-10 and high planet throughput, perfect for future space missions such as the Habitable Worlds Observatory. The two DMs in the wavefront control system serve as the apodizer. We present laboratory results on a segmented telescope pupil in broadband light on the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed. A Zernike wavefront sensor, which uses the light rejected by the coronagraph, simultaneously measures any high-order aberrations. We report on the achieved broadband contrast within a 10% and 20% bandpass, under natural and artificial environmental conditions.
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Emiel H. Por, Raphaël Pourcelot, Ananya Sahoo, Meiji M. Nguyen, Bryony F. Nickson, Alex Klein, Peter Petrone, Iva Laginja, Laurent Pueyo, and Rémi Soummer "Broadband performance of the PAPLC coronagraph on the HiCAT testbed", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126801D (6 October 2023); https://doi.org/10.1117/12.2677757
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KEYWORDS
Coronagraphy
Wavefront sensors
Observatories
Spatial frequencies
Telescopes
Wavefront aberrations
Mirrors
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