Performance of the Fast Atmospheric Self Coherent Camera at the NEW-EARTH Lab and a Simplified Measurement Algorithm
Type
Conference PaperPresentation
Authors
Thompson, WilliamMarois, Christian
Singh, Garima
Lardiere, Olivier
Gerard, Benjamin
Fu, Qiang

Heidrich, Wolfgang

KAUST Department
Computational Imaging GroupComputer Science Program
Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
King Abdullah Univ. of Science and Technology, address, Thuwal, Saudi Arabia
Visual Computing Center (VCC)
Date
2022-08-29Permanent link to this record
http://hdl.handle.net/10754/685142
Metadata
Show full item recordAbstract
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.Citation
Thompson, W. R., Marois, C., Singh, G., Lardière, O., Gerard, B. L., Fu, Q., & Heidrich, W. (2022). Performance of the FAST self coherent camera at the NEW-EARTH lab and a simplified SCC measurement algorithm. Adaptive Optics Systems VIII. https://doi.org/10.1117/12.2630415Sponsors
We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), 466479467. This research used the facilities of the Canadian Astronomy Data Centre operated by the National Research Council of Canada with the support of the Canadian Space Agency. The authors are grateful to have performed this work on the traditional territories of the Coast Salish and Lekwungen-speaking peoples of Vancouver Island.Publisher
SPIEConference/Event name
SPIE Astronomical Telescopes + Instrumentation, 2022ae974a485f413a2113503eed53cd6c53
10.1117/12.2630415