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Journal of Astronomical Telescopes, Instruments, and Systems

Numerical modeling of the proposed WFIRST-AFTA coronagraphs and their predicted performances
Author(s): John E. Krist; Bijan Nemati; Bertrand P. Mennesson
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Paper Abstract

The WFIRST-AFTA 2.37 m telescope will provide the opportunity to host a coronagraph for the imaging and spectroscopy of planets and disks in the next decade. The telescope, however, is not ideal, given its obscured aperture. Only recently have coronagraph designs been thoroughly investigated that can efficiently work with this configuration. Three coronagraph designs, the hybrid Lyot, shaped pupil, and phase-induced amplitude apodization complex mask coronagraph have been selected for further development by the Astrophysics Focused Telescope Asset project. Real-world testbed demonstrations of these have just begun, so for now, the most reliable means of evaluating their potential performance comes from numerical modeling incorporating diffraction propagation, realistic system models, and simulated wavefront sensing and control. Here, we present the methods of performance evaluation and results for the current coronagraph designs.

Paper Details

Date Published: 28 October 2015
PDF: 26 pages
J. Astron. Telesc. Instrum. Syst. 2(1) 011003 doi: 10.1117/1.JATIS.2.1.011003
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 2, Issue 1
Show Author Affiliations
John E. Krist, Jet Propulsion Lab. (United States)
Bijan Nemati, Jet Propulsion Lab. (United States)
Bertrand P. Mennesson, Jet Propulsion Lab. (United States)

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