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16 September 2015 Laboratory performance of the shaped pupil coronagraphic architecture for the WFIRST/AFTA coronagraph
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Abstract
One of the two primary architectures being tested for the WFIRST-AFTA coronagraph instrument is the shaped pupil coronagraph, which uses a binary aperture in a pupil plane to create localized regions of high contrast in a subsequent focal plane. The aperture shapes are determined by optimization, and can be designed to work in the presence of secondary obscurations and spiders - an important consideration for coronagraphy with WFIRST-AFTA. We present the current performance of the shaped pupil testbed, including the results of AFTA Milestone 2, in which ≈ 6 × 10-9 contrast was achieved in three independent runs starting from a neutral setting.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eric Cady, Camilo Mejia Prada, Xin An, Kunjithapatham Balasubramanian, Rosemary Diaz, N. Jeremy Kasdin, Brian Kern, Andreas Kuhnert, Bijan Nemati, Keith Patterson, Ilya Poberezhskiy, A. J. Eldorado Riggs, Daniel Ryan, Hanying Zhou, Robert Zimmer, and Neil T. Zimmerman "Laboratory performance of the shaped pupil coronagraphic architecture for the WFIRST/AFTA coronagraph", Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96050B (16 September 2015); https://doi.org/10.1117/12.2189113
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