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Proceedings Paper

Laboratory testing of a Phase-Induced Amplitude Apodization (PIAA) coronagraph
Author(s): Brian Kern; Olivier Guyon; Amir Give'on; Andreas Kuhnert; Albert Niessner
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Paper Abstract

We present high-contrast images from laboratory testing of a Phase Induced Amplitude Apodization (PIAA) coronagraph at NASA's High Contrast Imaging Testbed (HCIT). Using a deformable mirror and wavefront estimation and control algorithms, we create a "dark hole" in the monochromatic point-spread function with an inner working angle of 2.05 fλ/D, with a mean intensity 3.5×10-8. We discuss the contributions to this floor, and the techniques being developed to improve it. We also present simulations that investigate the effect of Lyot stops of various sizes, and conclude that a Lyot stop is necessary for 10-9 performance but that an annular postapodizer is not necessary.

Paper Details

Date Published: 15 September 2011
PDF: 9 pages
Proc. SPIE 8151, Techniques and Instrumentation for Detection of Exoplanets V, 815104 (15 September 2011); doi: 10.1117/12.896467
Show Author Affiliations
Brian Kern, Jet Propulsion Lab. (United States)
Olivier Guyon, Steward Observatory, The Univ. of Arizona (United States)
Amir Give'on, Jet Propulsion Lab. (United States)
Andreas Kuhnert, Jet Propulsion Lab. (United States)
Albert Niessner, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 8151:
Techniques and Instrumentation for Detection of Exoplanets V
Stuart Shaklan, Editor(s)

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