29 July 2016 Lyot coronagraph design study for large, segmented space telescope apertures
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Recent efforts combining the optimization techniques of apodized pupil Lyot coronagraphs (APLC) and shaped pupils have demonstrated the viability of a binary-transmission mask architecture for extremely high contrast (10-10) exoplanet imaging. We are now building on those innovations to carry out a survey of Lyot coronagraph performance for large, segmented telescope apertures. These apertures are of the same kind under considera- tion for NASA's Large UV/Optical/IR (LUVOIR) observatory concept. To map the multi-dimensional design parameter space, we have developed a software toolkit to manage large sets of mask optimization programs and execute them on a computing cluster. Here we summarize a preliminary survey of 500 APLC solutions for 4 reference hexagonal telescope apertures. Several promising designs produce annular, 10-10 contrast dark zones down to inner working angle 4λ0=D over a 15% bandpass, while delivering a half-max PSF core throughput of 18%. We also report our progress on devising solutions to the challenges of Lyot stop alignment/fabrication tolerance that arise in this contrast regime.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Neil T. Zimmerman, Neil T. Zimmerman, Mamadou N'Diaye, Mamadou N'Diaye, Kathryn E. St. Laurent, Kathryn E. St. Laurent, Rémi Soummer, Rémi Soummer, Laurent Pueyo, Laurent Pueyo, Christopher C. Stark, Christopher C. Stark, Anand Sivaramakrishnan, Anand Sivaramakrishnan, Marshall Perrin, Marshall Perrin, Robert J. Vanderbei, Robert J. Vanderbei, N. Jeremy Kasdin, N. Jeremy Kasdin, Stuart Shaklan, Stuart Shaklan, Alexis Carlotti, Alexis Carlotti, "Lyot coronagraph design study for large, segmented space telescope apertures", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99041Y (29 July 2016); doi: 10.1117/12.2233205; https://doi.org/10.1117/12.2233205

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