21 September 2012 End-to-end coronagraphic modeling including a low-order wavefront sensor
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John E. Krist, John E. Krist, John T. Trauger, John T. Trauger, Stephen C. Unwin, Stephen C. Unwin, Wesley A. Traub, Wesley A. Traub, } "End-to-end coronagraphic modeling including a low-order wavefront sensor", Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 844253 (21 September 2012); doi: 10.1117/12.927143; https://doi.org/10.1117/12.927143


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