Laboratory testing of a Phase-Induced Amplitude Apodization (PIAA) coronagraph

Brian Kern; Olivier Guyon; Amir Give'on; Andreas Kuhnert; Albert Niessner

doi:10.1117/12.896467

15 September 2011 Laboratory testing of a Phase-Induced Amplitude Apodization (PIAA) coronagraph

Brian Kern, Olivier Guyon, Amir Give'on, Andreas Kuhnert, Albert Niessner

Proceedings Volume 8151, Techniques and Instrumentation for Detection of Exoplanets V; 815104 (2011) https://doi.org/10.1117/12.896467
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

Citation Download Citation

Brian Kern, Olivier Guyon, Amir Give'on, Andreas Kuhnert, and Albert Niessner "Laboratory testing of a Phase-Induced Amplitude Apodization (PIAA) coronagraph", Proc. SPIE 8151, Techniques and Instrumentation for Detection of Exoplanets V, 815104 (15 September 2011); https://doi.org/10.1117/12.896467

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