An asterism generator for Keck All-sky Precision Adaptive optics

Scott J. Lilley; Peter Wizinowich; Ed Wetherell; Eduardo Marin; Jason Chin; Thomas Michaud-Baeyens; Jean-Thomas Landry; Marc-André Boucher; Denis Brousseau

doi:10.1117/12.2628623

29 August 2022 An asterism generator for Keck All-sky Precision Adaptive optics

Scott J. Lilley, Peter Wizinowich, Ed Wetherell, Eduardo Marin, Jason Chin, Thomas Michaud-Baeyens, Jean-Thomas Landry, Marc-André Boucher, Denis Brousseau

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121857F (2022) https://doi.org/10.1117/12.2628623
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

As part of the Keck All-sky Precision Adaptive optics (KAPA) project a laser Asterism Generator (AG) is being implemented on the Keck I telescope. The AG provides four Laser Guide Stars (LGS) to the Keck Adaptive Optics (AO) system by splitting a single 22W laser beam into four beams of equal intensity. We present the design and implementation of the AG for KAPA. We discuss the optical design and layout, the details of the mechanical design and fabrication, and the challenges of designing the assembly to fit into the limited available space on the Keck telescope.

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Scott J. Lilley, Peter Wizinowich, Ed Wetherell, Eduardo Marin, Jason Chin, Thomas Michaud-Baeyens, Jean-Thomas Landry, Marc-André Boucher, and Denis Brousseau "An asterism generator for Keck All-sky Precision Adaptive optics", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121857F (29 August 2022); https://doi.org/10.1117/12.2628623

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