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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2014/42855
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| Title: | End-to-end coronagraphic modeling including a low-order wavefront sensor |
| Authors: | Krist, John E.
Trauger, John T.
Unwin, Stephen C.
Traub, Wesley A. |
| Keywords: | coronagraphs
low order wavefront sensor (LOWFS) |
| Issue Date: | 1-Jul-2012 |
| Publisher: | Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2012. |
| Citation: | SPIE Astronomical Telescopes+Instrumentation, Amsterdam, Netherlands, July 1-6, 2012 |
| 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. |
| URI: | http://hdl.handle.net/2014/42855 |
| Appears in Collections: | JPL TRS 1992+
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