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Proceedings Paper

Phase-retrieval-based wavefront metrology for high contrast coronagraphy
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Paper Abstract

We discuss the use of parametric phase-diverse phase retrieval as an in-situ high-fidelity wavefront measurement method to characterize and optimize the transmitted wavefront of a high-contrast coronagraphic instrument. We apply our method to correct the transmitted wavefront of the HiCAT (High contrast imager for Complex Aperture Telescopes) coronagraphic testbed. This correction requires a series of calibration steps, which we describe. The correction improves the system wavefront from 16 nm RMS to 3.0 nm RMS.

Paper Details

Date Published: 24 July 2018
PDF: 13 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106986I (24 July 2018); doi: 10.1117/12.2314368
Show Author Affiliations
Gregory R. Brady, Space Telescope Science Institute (United States)
Christopher Moriarty, Space Telescope Science Institute (United States)
Peter Petrone, Space Telescope Science Institute (United States)
Iva Laginja, Space Telescope Science Institute (United States)
Keira Brooks, Space Telescope Science Institute (United States)
Tom Comeau, Space Telescope Science Institute (United States)
Lucie Leboulleux, Space Telescope Science Institute (United States)
Lab. d'Astrophysique de Marseille (France)
ONERA (France)
Rémi Soummer, Space Telescope Science Institute (United States)


Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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