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Subaru Coronagraphic Extreme-AO (SCExAO) wavefront control: current status and ongoing developments

Sahoo, Ananya and Guyon, Olivier and Clergeon, Christophe S. and Skaf, Nour and Minowa, Yosuke and Lozi, Julien and Jovanovic, Nemanja and Martinanche, Frantz (2018) Subaru Coronagraphic Extreme-AO (SCExAO) wavefront control: current status and ongoing developments. In: Adaptive Optics Systems VI. Proceedings of SPIE. No.10703. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 1070350. ISBN 9781510619593. http://resolver.caltech.edu/CaltechAUTHORS:20190110-081725460

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Abstract

Exoplanet imaging requires excellent wavefront correction and calibration. At the Subaru telescope this is achieved us- ing the 188-element facility adaptive optics system(AO188) feeding the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument; a multipurpose instrument built to deliver high contrast images of planets and disks around nearby stars. AO188 offers coarse correction while SCExAO performs fine correction and calibration of 1000 modes. The full system achieves 90%Strehl Ratio in H-band and diffraction limited images. A new Real Time Computer allowing higher performance between SCExAO and AO188 is currently implemented. Future upgrades will include a new Pyramid Wavefront Sensor and (64x64) DM to achieve extreme AO correction inside AO188. We are progressing in the development of predictive control and sensor fusion algorithms across the system to improve performance and calibration. With the new upgrades, SCExAO will be able to image giant planets in reflected light with Subaru and validate technologies necessary to image habitable Earth-like planets with the Thirty Meter Telescope (TMT).


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2314333DOIArticle
ORCID:
AuthorORCID
Guyon, Olivier0000-0002-1097-9908
Additional Information:© 2018 Society of Photo-optical Instrumentation Engineers (SPIE).
Group:Thirty Meter Telescope
Subject Keywords:adaptive optics, exoplanet, wavefront sensors, astronomical instrumentations, wavefront control
Record Number:CaltechAUTHORS:20190110-081725460
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190110-081725460
Official Citation:Ananya Sahoo, Olivier Guyon, Christophe S. Clergeon, Nour Skaf, Yosuke Minowa, Julien Lozi, Nemanja Jovanovic, Frantz Martinache , "Subaru Coronagraphic Extreme-AO (SCExAO) wavefront control: current status and ongoing developments," Proc. SPIE 10703, Adaptive Optics Systems VI, 1070350 (11 July 2018); doi: 10.1117/12.2314333
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92192
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:10 Jan 2019 20:32
Last Modified:10 Jan 2019 20:32

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