Numerically optimized coronagraph designs for the Habitable Exoplanet Imaging Mission (HabEx) concept

A J Eldorado Riggs; Garreth Ruane; Kevin Fogarty; Laurent Pueyo; Kunjithapatham Balasubramanian

doi:10.1117/12.2313843

9 August 2018 Numerically optimized coronagraph designs for the Habitable Exoplanet Imaging Mission (HabEx) concept

A J Eldorado Riggs, Garreth Ruane, Kevin Fogarty, Laurent Pueyo, Kunjithapatham Balasubramanian

Proceedings Volume 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave; 106980V (2018) https://doi.org/10.1117/12.2313843
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The primary science goal of the Habitable Exoplanet Imaging Mission (HabEx), one of four candidate flagship missions under investigation, is to image and spectrally characterize Earth-like exoplanets. It is well known that pupil obscurations degrade coronagraphic performance and complicate coronagraph design, so HabEx is planned to have an off-axis, unobscured primary mirror. We utilize the circular symmetry of the aperture to investigate 1D-radial coronagraph optimization methods that are prohibitively time-consuming or intractable in 2D, such as diffractive pupil remapping and concurrent, multi-plane optimization. We also directly constrain sensitivities to dynamic, low-order Zernike aberrations, which are separable in polar coordinates and can thus be propagated as 1D-radial integrals. The mask technologies in our designs claim heritage from the extensive modeling and testbed experiments performed by the Wide-Field Infrared Survey Telescope (WFIRST) Coronagraph Instrument (CGI) project. In this paper, we detail our optimization methods and outline future work to complete our design survey.

Conference Presentation

Citation Download Citation

A J Eldorado Riggs, Garreth Ruane, Kevin Fogarty, Laurent Pueyo, and Kunjithapatham Balasubramanian "Numerically optimized coronagraph designs for the Habitable Exoplanet Imaging Mission (HabEx) concept", Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106980V (9 August 2018); https://doi.org/10.1117/12.2313843

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