The space coronagraph optical bench (SCoOB): 2. Wavefront sensing and control in a vacuum-compatible coronagraph testbed for spaceborne high-contrast imaging technology

Kyle Van Gorkom; Ewan S. Douglas; Jaren N. Ashcraft; Sebastiaan Haffert; Daewook Kim; Heejoo Choi; Ramya M Anche; Jared R. Males; Kian Milani; Kevin Derby; Lori Harrison; Olivier Durney

doi:10.1117/12.2630704

27 August 2022 The space coronagraph optical bench (SCoOB): 2. Wavefront sensing and control in a vacuum-compatible coronagraph testbed for spaceborne high-contrast imaging technology

Kyle Van Gorkom, Ewan S. Douglas, Jaren N. Ashcraft, Sebastiaan Haffert, Daewook Kim, Heejoo Choi, Ramya M Anche, Jared R. Males, Kian Milani, Kevin Derby, Lori Harrison, Olivier Durney

Author Affiliations +

Proceedings Volume 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave; 121805M (2022) https://doi.org/10.1117/12.2630704
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The 2020 Decadal Survey on Astronomy and Astrophysics endorsed space-based high contrast imaging for the detection and characterization of habitable exoplanets as a key priority for the upcoming decade. To advance the maturity of starlight suppression techniques in a space-like environment, we are developing the Space Coronagraph Optical Bench (SCoOB) at the University of Arizona, a new thermal vacuum (TVAC) testbed based on the Coronagraphic Debris Exoplanet Exploring Payload (CDEEP), a SmallSat mission concept for high contrast imaging of circumstellar disks in scattered light. When completed, the testbed will combine a vector vortex coronagraph (VVC) with a Kilo-C microelectromechanical systems (MEMS) deformable mirror from Boston Micromachines Corp (BMC) and a self-coherent camera (SCC) with a goal of raw contrast surpassing 10−8 at visible wavelengths. In this proceedings, we report on our wavefront sensing and control efforts on this testbed in air, including the as-built performance of the optical system and the implementation of algorithms for focalplane wavefront control and digging dark holes (regions of high contrast in the focal plane) using electric field conjugation (EFC) and related algorithms.

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Kyle Van Gorkom, Ewan S. Douglas, Jaren N. Ashcraft, Sebastiaan Haffert, Daewook Kim, Heejoo Choi, Ramya M Anche, Jared R. Males, Kian Milani, Kevin Derby, Lori Harrison, and Olivier Durney "The space coronagraph optical bench (SCoOB): 2. Wavefront sensing and control in a vacuum-compatible coronagraph testbed for spaceborne high-contrast imaging technology", Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 121805M (27 August 2022); https://doi.org/10.1117/12.2630704

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