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Title: Path length control in a nulling coronagraph with a MEMS deformable mirror and a calibration interferometer.
Authors: Rao, Shanti R.
Wallacea, J. Kent
Samuele, Rocco
Chakrabarti, Supriya
Cook, Timothy
Hicks, Brian
Jung, Paul
Lane, Benjamin
Levine, B. Martin
Mendillo, Chris
Schmidtlin, Edouard
Shao, Mike
Stewart, Jason B.
Keywords: nulling coronagraph
extrasolar planets
calibration interferometers
MEMS adaptive optics
deformable mirrors
Issue Date: 23-Jan-2008
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2008.
Citation: Photonics West, San Jose, California, January 23, 2008.
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.
Appears in Collections:JPL TRS 1992+

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