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End-to-end coronagraphic modeling including a low-order wavefront sensor

Show simple item record Krist, John E. Trauger, John T. Unwin, Stephen C. Traub, Wesley A. 2013-03-15T19:31:03Z 2013-03-15T19:31:03Z 2012-07-01
dc.identifier.citation SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012 en_US
dc.identifier.clearanceno 12-2612
dc.description.abstract To evaluate space-based coronagraphic techniques, end-to-end modeling is necessary to simulate realistic fields containing speckles caused by wavefront errors. Real systems will suffer from pointing errors and thermal and motioninduced mechanical stresses that introduce time-variable wavefront aberrations that can reduce the field contrast. A loworder wavefront sensor (LOWFS) is needed to measure these changes at a sufficiently high rate to maintain the contrast level during observations. We implement here a LOWFS and corresponding low-order wavefront control subsystem (LOWFCS) in end-to-end models of a space-based coronagraph. Our goal is to be able to accurately duplicate the effect of the LOWFS+LOWFCS without explicitly evaluating the end-to-end model at numerous time steps. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. en_US
dc.subject coronagraphs en_US
dc.subject low order wavefront sensor (LOWFS) en_US
dc.title End-to-end coronagraphic modeling including a low-order wavefront sensor en_US
dc.type Preprint en_US
dc.subject.NASATaxonomy Instrumentation and Photography en_US

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