A Caltech Library Service

Validating advanced wavefront control techniques on the SCExAO testbed/instrument

Guyon, Olivier and Lozi, Julien and Vievard, Sebastien and Belikov, Ruslan and Bendek, Eduardo and Bos, Steven P. and Currie, Thayne and Deo, Vincent and Fitzgerald, Michael and Gratadour, Damien and Groff, Tyler D. and Jovanovic, Nemanja and Kawahara, Hajime and Kotani, Takayuki and Kudo, Tomoyuki and Lopez, Coline and Ltaief, Hatem and Males, Jared R. and Martinache, Frantz and Martinod, Marc-Antoine and Mazin, Benjamin and Miller, Kelsey L. and Norris, Barnaby and Ndiaye, Mamadou and Pluzhnyk, Eugene and Sahoo, Ananya and Sevin, Arnaud and Skaf, Nour and Snik, Frans and Tamura, Motohide and Wong, Alison (2020) Validating advanced wavefront control techniques on the SCExAO testbed/instrument. In: Adaptive Optics Systems VII. Proceedings of SPIE. No.11448. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114481Z. ISBN 9781510636835.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) serves both a science instrument in operation, and a prototyping platform for integrating and validating advanced wavefront control techniques. It provides a modular hardware and software environment optimized for flexible prototyping, reducing the time from concept formulation to on-sky operation and validation. This approach also enables external research group to deploy and test new hardware and algorithms. The hardware architecture allows for multiple subsystems to run concurrently, sharing starlight by means of dichroics. The multiplexing lends itself to running parallel experiments simultaneously, and developing sensor fusion approaches for increased wavefront sensing sensitivity and reliability. Thanks to a modular realtime control software architecture designed around the CACAO package, users can deploy WFS/C routines with full low-latency access to all cameras data streams. Algorithms can easily be shared with other cacao-based AO systems at Magellan (MagAO-X) and Keck. We highlight recent achievements and ongoing activities that are particularly relevant to the development of high contrast imaging instruments for future large ground-based telescopes (ELT, TMT, GMT) and space telescopes (HabEx, LUVOIR). These include predictive control and sensor fusion, PSF reconstruction from AO telemetry, integrated coronagraph/WFS development, focal plane speckle control with photon counting MKIDS camera, and fiber interferometry. We also describe upcoming upgrades to the WFS/C architecture: a new 64x64 actuator first stage DM, deployment of a beam switcher for concurrent operation of SCExAO with other science instruments, and the ULTIMATE upgrade including deployment of multiple LGS WFSs and an adaptive secondary mirror.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Guyon, Olivier0000-0002-1097-9908
Lozi, Julien0000-0002-3047-1845
Vievard, Sebastien0000-0003-4018-2569
Bendek, Eduardo0000-0002-9408-8925
Currie, Thayne0000-0002-7405-3119
Fitzgerald, Michael0000-0002-0176-8973
Groff, Tyler D.0000-0001-5978-3247
Jovanovic, Nemanja0000-0001-5213-6207
Kawahara, Hajime0000-0003-3309-9134
Kudo, Tomoyuki0000-0002-9294-1793
Martinache, Frantz0000-0003-1180-4138
Mazin, Benjamin0000-0003-0526-1114
Norris, Barnaby0000-0002-8352-7515
Sahoo, Ananya0000-0003-2806-1254
Skaf, Nour0000-0002-9372-5056
Snik, Frans0000-0003-1946-7009
Tamura, Motohide0000-0002-6510-0681
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). The development of SCExAO was supported by the Japan Society for the Promotion of Science (Grant-in-Aid for Research #23340051, #26220704, #23103002, #19H00703 & #19H00695), the Astrobiology Center of the National Institutes of Natural Sciences, Japan, the Mt Cuba Foundation and the director's contingency fund at Subaru Telescope. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the Hawaiian community. We are very fortunate to have the opportunity to conduct observations from this mountain.
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)23340051
Japan Society for the Promotion of Science (JSPS)26220704
Japan Society for the Promotion of Science (JSPS)19H00703
Japan Society for the Promotion of Science (JSPS)19H00695
National Institutes of Natural Sciences of JapanUNSPECIFIED
Mt. Cuba Astronomical FoundationUNSPECIFIED
Subaru TelescopeUNSPECIFIED
Subject Keywords:Adaptive Optics, High Contrast Imaging, Wavefront Sensing, Atmospheric Turbulence
Series Name:Proceedings of SPIE
Issue or Number:11448
Record Number:CaltechAUTHORS:20201217-152640014
Persistent URL:
Official Citation:Olivier Guyon, Julien Lozi, Sebastien Vievard, Ruslan Belikov, Eduardo Bendek, Steven Bos, Thayne Currie, Vincent Deo, Michael Fitzgerald, Damien Gratadour, Tyler Groff, Nemanja Jovanovic, Hajime Kawahara, Takayuki Kotani, Tomoyuki Kudo, Coline Lopez, Hatem Ltaief, Jared Males, Frantz Martinache, Marc-Antoine Martinod, Benjamin A. Mazin, Kelsey Miller, Barnaby Norris, Mamadou Ndiaye, Eugene Pluzhnyk, Ananya Sahoo, Arnaud Sevin, Nour Skaf, Frans Snik, Motohide Tamura, and Alison Wong "Validating advanced wavefront control techniques on the SCExAO testbed/instrument", Proc. SPIE 11448, Adaptive Optics Systems VII, 114481Z (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107179
Deposited By: Tony Diaz
Deposited On:18 Dec 2020 00:08
Last Modified:16 Nov 2021 19:00

Repository Staff Only: item control page