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High-contrast imager for complex aperture telescopes (HiCAT): 6. Two deformable mirror wavefront control (Conference Presentation)

Paper Abstract

The goal of the High-contrast imager for Complex Aperture Telescopes (HiCAT) testbed is to demonstrate coronagraphic starlight suppression solutions for future segmented aperture space telescopes such as the Large UV, Optical, IR telescope (LUVOIR) mission concept being studied by NASA. The testbed design has the flexibility to enable studies with increasing complexity for telescope aperture geometries starting with off-axis telescopes, then on-axis telescopes with central obstruction and support structures. The testbed implements the Apodized Pupil Lyot Coronagraph (APLC) optimized for the HiCAT aperture, which is similar to one of the possible geometries considered for LUVOIR. Wavefront can be controlled using continuous deformable mirrors, and wavefront sensing is performed using the imaging camera, or a dedicated phase retrieval camera, and also in a low-order wavefront sensing arm. We present a progress update of the testbed in particular results using two deformable mirror control to produce high-contrast dark zone, and preliminary results using the testbed’s low order Zernike wavefront sensor.

Paper Details

Date Published: 9 September 2019
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Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171Y (9 September 2019); doi: 10.1117/12.2530299
Show Author Affiliations
Rémi Soummer, Space Telescope Science Institute (United States)
Iva Laginja, Space Telescope Science Institute (United States)
Scott Will, Univ. of Rochester (United States)
Roser Juanola-Parramon, NASA Goddard Space Flight Ctr. (United States)
Peter Petrone III, Space Telescope Science Institute (United States)
Greg Brady, Space Telescope Science Institute (United States)
James Noss, Space Telescope Science Institute (United States)
Marshall D. Perrin, Space Telescope Science Institute (United States)
Julia Fowler, Space Telescope Science Institute (United States)
Heather Kurtz, Space Telescope Science Institute (United States)
Kathryn St. Laurent, Space Telescope Science Institute (United States)
Kevin Fogarty, Caltech (United States)
Evelyn McChesney, Space Telescope Science Institute (United States)
Nathan Scott, Johns Hopkins Univ. (United States)
Keira Brooks, Space Telescope Science Institute (United States)
Thomas Comeau, Space Telescope Science Institute (United States)
Marc Ferrari, Lab. d'Astrophysique de Marseille (France)
Rob Gontrum, Space Telescope Science Institute (United States)
John Hagopian, Advanced NanoPhotonics, Inc. (United States)
Emmanuel Hugot, Lab. d'Astrophysique de Marseille (France)
Lucie Leboulleux, Lab. d'Astrophysique de Marseille (France)
Johan Mazoyer, Space Telescope Science Institute (United States)
Laurent Mugnier, ONERA (France)
Lab. d'Astrophysique de Marseille (France)
Mamadou N'Diaye, Observatoire de la Côte d'Azur (France)
Laurent Pueyo, Space Telescope Science Institute (United States)
Jean-François Sauvage, ONERA (France)
Lab. d'Astrophysique de Marseille (France)
Ron Shiri, NASA Goddard Space Flight Ctr. (United States)
Anand Sivaramakrishnan, Space Telescope Science Institute (United States)
Ana-Maria Valenzuela, Space Telescope Science Institute (United States)
Neil T. Zimmerman, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11117:
Techniques and Instrumentation for Detection of Exoplanets IX
Stuart B. Shaklan, Editor(s)

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