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Path Length Control in a Nulling Coronagraph with a MEMS Deformable Mirror and a Calibration Interferometer
- Publication Year :
- 2008
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 2008.
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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.
- Subjects :
- Instrumentation And Photography
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Notes :
- NNG05WC17G, , NSF AST-9876783
- Publication Type :
- Report
- Accession number :
- edsnas.20110013185
- Document Type :
- Report