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Shaped pupil Lyot coronagraph designs for WFIRST/AFTA

Author(s): Zimmerman, NT; Riggs, AJE; Kasdin, NJ; Carlotti, A; Vanderbei, Robert J.

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Abstract: © 2015 SPIE.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.
Publication Date: 16-Sep-2015
Citation: Zimmerman, NT, Riggs, AJE, Kasdin, NJ, Carlotti, A, Vanderbei, RJ. "Shaped pupil Lyot coronagraph designs for WFIRST/AFTA" Proceedings of SPIE, 9605, Techniques and Instrumentation for Detection of Exoplanets VII, August 09, 2015, San Diego, California, 2014. doi:10.1117/12.2187141
DOI: doi:10.1117/12.2187141
ISSN: 0277-786X
EISSN: 1996-756X
Type of Material: Conference Article
Series/Report no.: Proceedings of SPIE;96050A
Journal/Proceeding Title: Techniques and Instrumentation for Detection of Exoplanets VII, August 09, 2015, San Diego, California
Version: This is the publisher’s version of the article (version of record). All rights reserved to the publisher. Please refer to the publisher's site for terms of use.

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