Developments on LLNL's high contrast testbed and Lick/ShaneAO

Benjamin L. Gerard; Dominic F. Sanchez; Aditya R. Sengupta; Bautista R. Fernandez; Cesar Laguna; Christopher Ratliff; Daren Dillon; Sylvain Cetre; David Tucker; Mike Kim; Lisa Poyneer; Brian Bauman; Elinor Gates; Maureen Savage; Rebecca Jensen-Clem; S. Mark Ammons; Phil Hinz; Bruce Macintosh

Developments on LLNL's high contrast testbed and Lick/ShaneAO

Instrumentation and Methods for Astrophysics 2025-08-18 v1

Authors: Benjamin L. Gerard , Dominic F. Sanchez , Aditya R. Sengupta , Bautista R. Fernandez , Cesar Laguna , Christopher Ratliff , Daren Dillon , Sylvain Cetre , David Tucker , Mike Kim , Lisa Poyneer , Brian Bauman , Elinor Gates , Maureen Savage , Rebecca Jensen-Clem , S. Mark Ammons , Phil Hinz , Bruce Macintosh

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Abstract

LLNL has recently setup a High Contrast Testbed (HCT) for AO and exoplanet imaging technology development. We present the various HCT technologies currently under development, including (1) a Wynne corrector, (2) multi-wavefront sensor (WFS) single conjugate AO (SCAO) control. We present HCT testing results of a first Wynne corrector prototype with a self-coherent camera. We present updates on development efforts to design and apply multi-WFS SCAO control to our HCT setup. We also present ongoing HCT deformable mirror and WFS upgrades. Lastly, we present developments for REDWOODS, a project to deploy many of these technologies on-sky on a sub-bench of the Shane AO system at Lick Observatory.

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@article{arxiv.2508.11114,
  title  = {Developments on LLNL's high contrast testbed and Lick/ShaneAO},
  author = {Benjamin L. Gerard and Dominic F. Sanchez and Aditya R. Sengupta and Bautista R. Fernandez and Cesar Laguna and Christopher Ratliff and Daren Dillon and Sylvain Cetre and David Tucker and Mike Kim and Lisa Poyneer and Brian Bauman and Elinor Gates and Maureen Savage and Rebecca Jensen-Clem and S. Mark Ammons and Phil Hinz and Bruce Macintosh},
  journal= {arXiv preprint arXiv:2508.11114},
  year   = {2025}
}

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submitted to Proceedings of SPIE 2025 Optics + Photonics, Astronomical Applications, Paper number 13627-12

Developments on LLNL's high contrast testbed and Lick/ShaneAO

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