26 September 2013 Laboratory demonstration of Phase Induced Amplitude Apodization (PIAA) coronagraph with better than 10-9 contrast
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Abstract
We present coronagraphic images from the Phase Induced Amplitude Apodization (PIAA) coronagraph on NASA's High Contrast Imaging Testbed (HCIT) at the Jet Propulsion Lab, showing contrasts of 5×10−10 averaged from 2-4 λ/D, in monochromatic light at 808 nm. In parallel with the coronagraph and its deformable mirror and coronagraphic wavefront control, we also demonstrate a low-order wavefront control system, giving 100× rms suppression of introduced tip/tilt disturbances down to residual levels of 10−3 λ/D. Current limitations, as well as broadband (10% fractional bandpass) preliminary results are discussed.
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Brian Kern, Brian Kern, Olivier Guyon, Olivier Guyon, Andreas Kuhnert, Andreas Kuhnert, Albert Niessner, Albert Niessner, Frantz Martinache, Frantz Martinache, Kunjithapatham Balasubramanian, Kunjithapatham Balasubramanian, } "Laboratory demonstration of Phase Induced Amplitude Apodization (PIAA) coronagraph with better than 10-9 contrast", Proc. SPIE 8864, Techniques and Instrumentation for Detection of Exoplanets VI, 88640R (26 September 2013); doi: 10.1117/12.2022929; https://doi.org/10.1117/12.2022929
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