Performance of the Fast Atmospheric Self Coherent camera at the NEW-EARTH lab and a simplified measurement algorithm

William Thompson; Christian Marois; Garima Singh; Olivier Lardière; Benjamin Gerard; Qiang Fu; Wolfgang Heidrich

doi:10.1117/12.2630415

29 August 2022 Performance of the Fast Atmospheric Self Coherent camera at the NEW-EARTH lab and a simplified measurement algorithm

William Thompson, Christian Marois, Garima Singh, Olivier Lardière, Benjamin Gerard, Qiang Fu, Wolfgang Heidrich

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121852C (2022) https://doi.org/10.1117/12.2630415
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

In order to detect low mass and mature planets inwards of approximately 5 AU, future direct imaging instruments will require precision wavefront control that operates at relatively high speed. The self-coherent camera (SCC) is a promising technique for measuring the wavefront from science images at the focal plane. We present here results from NRC’s NEW-EARTH lab testing of the Fast Atmospheric SCC Technique, a variant of the SCC and its integration with a Lyot-stop Low-Order Wavefront Sensor. We demonstrate correction of quasi-static speckles in a half dark hole reaching raw 1σ contrasts on the order of 5 × 10⁻⁷ at 10 λ/D. We also present a simplified process for extracting measurements and/or DM commands from SCC images using a single matrixvector multiply. This testing and development are important steps on the way to the upcoming Subaru Pathfinder Instrument for Detection of Exoplanets and Removal of Speckles and the Gemini Planet Imager’s CAL2 upgrade.

Conference Presentation

Citation Download Citation

William Thompson, Christian Marois, Garima Singh, Olivier Lardière, Benjamin Gerard, Qiang Fu, and Wolfgang Heidrich "Performance of the Fast Atmospheric Self Coherent camera at the NEW-EARTH lab and a simplified measurement algorithm", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121852C (29 August 2022); https://doi.org/10.1117/12.2630415

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