Share Email Print
cover

Proceedings Paper

High-contrast Imager for Complex Aperture Telescopes (HICAT): II. Design overview and first light results
Author(s): Mamadou N'Diaye; Elodie Choquet; Sylvain Egron; Laurent Pueyo; Lucie Leboulleux; Olivier Levecq; Marshall D. Perrin; Erin Elliot; J. Kent Wallace; Emmanuel Hugot; Michel Marcos; Marc Ferrari; Chris A. Long; Rachel Anderson; Audrey DiFelice; Rémi Soummer
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We present a new high-contrast imaging testbed designed to provide complete solutions in wavefront sensing, control and starlight suppression with complex aperture telescopes. The testbed was designed to enable a wide range of studies of the effects of such telescope geometries, with primary mirror segmentation, central obstruction, and spiders. The associated diffraction features in the point spread function make high-contrast imaging more challenging. In particular the testbed will be compatible with both AFTA-like and ATLAST-like aperture shapes, respectively on-axis monolithic, and on-axis segmented telescopes. The testbed optical design was developed using a novel approach to define the layout and surface error requirements to minimize amplitude­ induced errors at the target contrast level performance. In this communication we compare the as-built surface errors for each optic to their specifications based on end-to-end Fresnel modelling of the testbed. We also report on the testbed optical and optomechanical alignment performance, coronagraph design and manufacturing, and preliminary first light results.

Paper Details

Date Published: 28 August 2014
PDF: 11 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 914327 (28 August 2014); doi: 10.1117/12.2056694
Show Author Affiliations
Mamadou N'Diaye, Space Telescope Science Institute (United States)
Elodie Choquet, Space Telescope Science Institute (United States)
Sylvain Egron, Institut d'Optique Graduate School (France)
Space Telescope Science Institute (United States)
Laurent Pueyo, Space Telescope Science Institute (United States)
Johns Hopkins Univ. (United States)
Lucie Leboulleux, Institut d'Optique Graduate School (France)
Space Telescope Science Institute (United States)
Olivier Levecq, Institut d'Optique Graduate School (France)
Space Telescope Science Institute (United States)
Marshall D. Perrin, Space Telescope Science Institute (United States)
Erin Elliot, Space Telescope Science Institute (United States)
J. Kent Wallace, Jet Propulsion Lab. (United States)
Emmanuel Hugot, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Michel Marcos, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Marc Ferrari, Lab. d'Astrophysique de Marseille, CNRS, Aix Marseille Univ. (France)
Chris A. Long, Space Telescope Science Institute (United States)
Rachel Anderson, Space Telescope Science Institute (United States)
Audrey DiFelice, Space Telescope Science Institute (United States)
Rémi Soummer, Space Telescope Science Institute (United States)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

© SPIE. Terms of Use
Back to Top