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Proceedings Paper

Path length control in a nulling coronagraph with a MEMS deformable mirror and a calibration interferometer
Author(s): Shanti R. Rao; J. Kent Wallace; Rocco Samuele; Supriya Chakrabarti; Timothy Cook; Brian Hicks; Paul Jung; Benjamin Lane; B. Martin Levine; Chris Mendillo; Edouard Schmidtlin; Mike Shao; Jason B. Stewart
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Paper Abstract
We report progress on a nulling coronagraph intended for direct imaging of extrasolar planets. White light is suppressed in an interferometer, and phase errors are measured by a second interferometer. A 1020-pixel MEMS deformable mirror in the first interferometer adjusts the path length across the pupil. A feedback control system reduces deflections of the deformable mirror to order of 1 nm rms.
Paper Details
Date Published: 8 February 2008
PDF: 9 pages
Proc. SPIE 6888, MEMS Adaptive Optics II, 68880B (8 February 2008); doi: 10.1117/12.763652
Show Author Affiliations
Shanti R. Rao, Jet Propulsion Lab. (United States)
J. Kent Wallace, Jet Propulsion Lab. (United States)
Rocco Samuele, Northrop Grumman Space Technologies (United States)
Supriya Chakrabarti, Boston Univ. (United States)
Timothy Cook, Boston Univ. (United States)
Brian Hicks, Boston Univ. (United States)
Paul Jung, Boston Univ. (United States)
Benjamin Lane, Draper Lab. (United States)
B. Martin Levine, Jet Propulsion Lab. (United States)
Chris Mendillo, Boston Univ. (United States)
Edouard Schmidtlin, Jet Propulsion Lab. (United States)
Mike Shao, Jet Propulsion Lab. (United States)
Jason B. Stewart, Boston Univ. (United States)

Published in SPIE Proceedings Vol. 6888:
MEMS Adaptive Optics II
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)
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