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Path Length Control in a Nulling Coronagraph with a MEMS Deformable Mirror and a Calibration InterferometerWe 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.
Document ID
20110013185
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
External Source(s)
Authors
Rao, Shanti R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Wallacea, J. Kent
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Samuele, Rocco
(Northrop Grumman Space Technology Redondo Beach, CA, United States)
Chakrabarti, Supriya
(Boston Univ. Boston, MA, United States)
Cook, Timothy
(Boston Univ. Boston, MA, United States)
Hicks, Brian
(Boston Univ. Boston, MA, United States)
Jung, Paul
(Northrop Grumman Space Technology Redondo Beach, CA, United States)
Lane, Benjamin
(Draper (Charles Stark) Lab., Inc. Cambridge, MA, United States)
Levine, B. Martin
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Mendillo, Chris
(Boston Univ. Boston, MA, United States)
Schmidtlin, Edouard
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Shao, Mike
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Stewart, Jason B.
(Boston Univ. Boston, MA, United States)
Date Acquired
August 25, 2013
Publication Date
January 23, 2008
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Photonics West
Location: San Jose, CA
Country: United States
Start Date: January 23, 2008
Funding Number(s)
CONTRACT_GRANT: NNG05WC17G
CONTRACT_GRANT: NSF AST-9876783
Distribution Limits
Public
Copyright
Other
Keywords
MEMS adaptive optics
nulling coronagraph
extrasolar planets
deformable mirrors
calibration interferometers

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