@inproceedings{1dc3c521292442079a08b25bbf79fbe3,
title = "Sparse aperture mask wavefront sensor testbed results",
abstract = "Coronagraphic exoplanet detection at very high contrast requires the estimation and control of low-order wave- front aberrations. At Princeton High Contrast Imaging Lab (PHCIL), we are working on a new technique that integrates a sparse-aperture mask (SAM) with a shaped pupil coronagraph (SPC) to make precise estimates of these low-order aberrations. We collect the starlight rejected from the coronagraphic image plane and interfere it using a sparse aperture mask (SAM) at the relay pupil to estimate the low-order aberrations. In our previous work we numerically demonstrated the efficacy of the technique, and proposed a method to sense and control these differential aberrations in broadband light. We also presented early testbed results in which the SAM was used to sense pointing errors. In this paper, we will briefly overview the SAM wavefront sensor technique, explain the design of the completed testbed, and report the experimental estimation results of the dominant low-order aberrations such as tip/tit, astigmatism and focus.",
keywords = "Coronagraph, Exoplanet, High-contrast imaging, Wavefront control, Wavefront sensing",
author = "Hari Subedi and Zimmerman, {Neil T.} and Kasdin, {N. Jeremy} and Riggs, {A. J.E.}",
note = "Funding Information: This work was partially funded by NASA Technology Development for Exoplanet Missions (TDEM) grant number NNX09AB96G and by the Jet Propulsion Laboratory of the California Institute of Technology. Hari Subedi is supported by National Science Foundation Graduate Research Fellowship. A J E. Riggs is supported by NASA grant number NNX14AM06H, a NASA Space Technology Research Fellowship Publisher Copyright: {\textcopyright} 2016 SPIE.; Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave ; Conference date: 26-06-2016 Through 01-07-2016",
year = "2016",
doi = "10.1117/12.2232015",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "MacEwen, {Howard A.} and Makenzie Lystrup and Fazio, {Giovanni G.}",
booktitle = "Space Telescopes and Instrumentation 2016",
address = "United States",
}