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Proceedings Paper

Phase induced amplitude apodization (PIAA) coronagraphy: recent results and future prospects
Author(s): Olivier Guyon; Brian Kern; Ruslan Belikov; Stuart Shaklan; Andreas Kuhnert; Amir Give'on; Frantz Martinache
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Paper Abstract

Thanks to the use of aspheric optics for lossless apodization, the Phase Induced Amplitude Apodization (PIAA) coronagraph offers full throughput, high contrast and small inner working angle. It is therefore ideally suited for space-based direct imaging of potentially habitable exoplanets. The concept has evolved since its original formulation to mitigate manufacturing challenges and improve performance. Our group is currently aiming at demonstrating PIAA coronagraphy in the laboratory to 1e-9 raw contrast at 2 λ/D separation. Recent results from the High Contrast Imaging Testbed (HCIT) at JPL demonstrate contrasts about one order of magnitude from this goal at 2 λ/D. In parallel with our high contrast demonstration at 2 λ/D, we are developing and testing new designs to reduce inner working angle and improve performance in polychromatic light. The newly developed PIAA complex mask coronagraph (PIAACMC) concept provides total starlight extinction and offers full throughput with a sub- λ/D inner working angles. We also describe a recent laboratory demonstration of fine pointing control with PIAA.

Paper Details

Date Published: 21 September 2012
PDF: 11 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84424V (21 September 2012); doi: 10.1117/12.927187
Show Author Affiliations
Olivier Guyon, Steward Observatory, The Univ. of Arizona (United States)
Subaru Telescope, National Astronomical Observatory of Japan (United States)
Brian Kern, Jet Propulsion Lab. (United States)
Ruslan Belikov, NASA Ames Research Ctr. (United States)
Stuart Shaklan, Jet Propulsion Lab. (United States)
Andreas Kuhnert, Jet Propulsion Lab. (United States)
Amir Give'on, Jet Propulsion Lab. (United States)
Frantz Martinache, Subaru Telescope, National Astronomical Observatory of Japan (United States)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

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