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Proceedings Paper

Wavefront control performance modeling with WFIRST shaped pupil coronagraph testbed
Author(s): Hanying Zhou; Bijian Nemati; John Krist; Eric Cady; Brian Kern; Ilya Poberezhskiy
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Paper Abstract

NASA’s WFIRST mission includes a coronagraph instrument (CGI) for direct imaging of exoplanets. Significant improvement in CGI model fidelity has been made recently, alongside a testbed high contrast demonstration in a simulated dynamic environment at JPL. We present our modeling method and results of comparisons to testbed’s high order wavefront correction performance for the shaped pupil coronagraph. Agreement between model prediction and testbed result at better than a factor of 2 has been consistently achieved in raw contrast (contrast floor, chromaticity, and convergence), and with that comes good agreement in contrast sensitivity to wavefront perturbations and mask lateral shear.

Paper Details

Date Published: 1 September 2017
PDF: 15 pages
Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 1040005 (1 September 2017); doi: 10.1117/12.2274391
Show Author Affiliations
Hanying Zhou, Jet Propulsion Lab. (United States)
Bijian Nemati, Jet Propulsion Lab. (United States)
John Krist, Jet Propulsion Lab. (United States)
Eric Cady, Jet Propulsion Lab. (United States)
Brian Kern, Jet Propulsion Lab. (United States)
Ilya Poberezhskiy, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 10400:
Techniques and Instrumentation for Detection of Exoplanets VIII
Stuart Shaklan, Editor(s)

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