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Proceedings Paper

Shaped pupil Lyot coronagraph designs for WFIRST/AFTA
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Paper Abstract

The baseline design for the WFIRST-AFTA Coronagraphic Instrument includes several shaped pupil masks. Our newest designs incorporate the shaped pupil into a Lyot-style architecture to access smaller inner working angles at a given tradeoff in throughput and contrast. We describe two mask configurations: a characterization mode for spectroscopy of exoplanet atmospheres, and a wider-field mode for debris disk observations. We use polychromatic contrast constraints to anchor the spatial extent of the dark search region over the instrument filter bandpass. We examine several practical issues that arise during the optimization process, such as the use of symmetry, and the choice of spatial and wavelength resolutions in the propagation model. Finally, we evaluate the tolerances of the new designs to mask translation and clocking errors.

Paper Details

Date Published: 16 September 2015
PDF: 14 pages
Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96050A (16 September 2015); doi: 10.1117/12.2187141
Show Author Affiliations
Neil T. Zimmerman, Princeton Univ. (United States)
A.J. Eldorado Riggs, Princeton Univ. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
Alexis Carlotti, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
Robert J. Vanderbei, Princeton Univ. (United States)


Published in SPIE Proceedings Vol. 9605:
Techniques and Instrumentation for Detection of Exoplanets VII
Stuart Shaklan, Editor(s)

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