The GPU-based High-order adaptive OpticS Testbench

Byron Engler; Markus Kasper; Serban Leveratto; Cedric Taissir Heritier; Paul Bristow; Christophe Verinaud; Miska Le Louarn; Jalo Nousiainen; Tapio Helin; Markus Bonse; Sascha Quanz; Adrian Glauser; Damien Gratadour; Julien Bernard; Richard Clare

doi:10.1117/12.2630595

29 August 2022 The GPU-based High-order adaptive OpticS Testbench

Byron Engler, Markus Kasper, Serban Leveratto, Cedric Taissir Heritier, Paul Bristow, Christophe Verinaud, Miska Le Louarn, Jalo Nousiainen, Tapio Helin, Markus Bonse, Sascha Quanz, Adrian Glauser, Damien Gratadour, Julien Bernard, Richard Clare

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218558 (2022) https://doi.org/10.1117/12.2630595
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The GPU-based High-order adaptive OpticS Testbench (GHOST) at the European Southern Observatory (ESO) is a new 2-stage extreme adaptive optics (XAO) testbench at ESO. The GHOST is designed to investigate and evaluate new control methods (machine learning, predictive control) for XAO which will be required for instruments such as the Planetary Camera and Spectrograph of ESOs Extremely Large Telescope. The first stage corrections are performed in simulation, with the residual wavefront error at each iteration saved. The residual wavefront errors from the first stage are then injected into the GHOST using a spatial light modulator. The second stage correction is made with a Boston Michromachines Corporation 492 actuator deformable mirror and a pyramid wavefront sensor. The flexibility of the bench also opens it up to other applications, one such application is investigating the flip-flop modulation method for the pyramid wavefront sensor.

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Byron Engler, Markus Kasper, Serban Leveratto, Cedric Taissir Heritier, Paul Bristow, Christophe Verinaud, Miska Le Louarn, Jalo Nousiainen, Tapio Helin, Markus Bonse, Sascha Quanz, Adrian Glauser, Damien Gratadour, Julien Bernard, and Richard Clare "The GPU-based High-order adaptive OpticS Testbench", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218558 (29 August 2022); https://doi.org/10.1117/12.2630595

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