27 July 2016 CHOUGH: implementation and performance of a high-order 4m AO demonstrator
Author Affiliations +
CHOUGH is a small, fast project to provide an experimental on-sky high-order SCAO capability to the 4.2m WHT telescope. The basic goal has r0-sized sub- apertures with the aim of achieving high-Strehl ratios (> 0:5) in the visible (> 650 nm). It achieves this by including itself into the CANARY experiment: CHOUGH is mounted as a breadboard and intercepts the beam within CANARY via a periscope. In doing so, it takes advantage of the mature CANARY infrastructure, but add new AO capabilities. The key instruments that CHOUGH brings to CANARY are: an atmospheric dispersion compensator; a 32 × 32 (1000 actuator) MEMS deformable mirror; 31 × 31 wavefront sensor; and a complementary (narrow-field) imager. CANARY provides a 241-actuator DM, tip/tilt mirror, and comprehensive off-sky alignment facility together with a RTC. In this work, we describe the CHOUGH sub-systems: backbone, ADC, MEMS-DM, HOWFS, CAWS, and NFSI.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nazim A. Bharmal, Nazim A. Bharmal, Alastair G. Basden, Alastair G. Basden, Cyril J. Bourgenot, Cyril J. Bourgenot, Martin Black, Martin Black, Cornelis M. Dubbeldam, Cornelis M. Dubbeldam, David M. Henry, David M. Henry, Daniel Hölck-Santibanez, Daniel Hölck-Santibanez, Timothy J. Morris, Timothy J. Morris, David J. Robertson, David J. Robertson, Jürgen Schmoll, Jürgen Schmoll, Robert G. Talbot, Robert G. Talbot, Eddy J. Younger, Eddy J. Younger, Richard M. Myers, Richard M. Myers, "CHOUGH: implementation and performance of a high-order 4m AO demonstrator", Proc. SPIE 9909, Adaptive Optics Systems V, 990948 (27 July 2016); doi: 10.1117/12.2231721; https://doi.org/10.1117/12.2231721


LINC NIRVANA how to get a 23 m wavefront...
Proceedings of SPIE (October 24 2004)
A Near Infrared Astronomical Adaptive Optics System
Proceedings of SPIE (September 19 1989)
Design of the 6.5 m MMT Adaptive Optics System and...
Proceedings of SPIE (March 20 1997)
NSO/SP adaptive optics program
Proceedings of SPIE (July 31 1990)

Back to Top