From Event: SPIE Optical Engineering + Applications, 2017
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.
Hanying Zhou, Bijian Nemati, John Krist, Eric Cady, Brian Kern, and Ilya Poberezhskiy, "Wavefront control performance modeling with WFIRST shaped pupil coronagraph testbed
," Proc. SPIE 10400, Techniques and Instrumentation for Detection of Exoplanets VIII, 1040005 (Presented at SPIE Optical Engineering + Applications: August 08, 2017; Published: 1 September 2017); https://doi.org/10.1117/12.2274391.
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