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Laboratory Testing of a Phased Induced Amplitude Apodization (PIAA) CoronagraphWe 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 f lambda/D), with a mean intensity 3.5x10(exp -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(exp -9) performance but that an annular postapodizer is not necessary.
Document ID
20150006104
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Kern, Brian
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Guyon, Olivier
(Arizona Univ. Tucson, AZ, United States)
Give'on, Amir
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kuhnert, Andreas
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Niessner, Albert
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
April 22, 2015
Publication Date
August 23, 2011
Subject Category
Astronomy
Meeting Information
Meeting: SPIE Optics + Photonics 2011
Location: San Diego, CA
Country: United States
Start Date: August 20, 2011
End Date: August 25, 2011
Sponsors: International Society for Optical Engineering
Distribution Limits
Public
Copyright
Other
Keywords
deformable mirror
exoplanets
coronagraphy
wavefront control
wavefront estimation

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