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Proceedings Paper

Deformable mirror controller for open-loop adaptive optics
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Paper Abstract

A Deformable Mirror Controller (DMC) has been devised to overcome the open-loop nature of Multi Object Adaptive Optics (MOAO), in particular for AO systems with update rates of 1 ms or less. The system is based on a figure sensor, which uses a monochromatic illumination source and a Shack-Hartmann (SH) wavefront sensor (WFS) to obtain a fine sampling of DM's 3D surface. The sensor's beam is optically separated from the science path in order to not interfere with science observations. The DMC incorporates a real-time controller in charge of driving the DM. This controller runs in a dedicated Field-Programmable-Gate-Array (FPGA) based processor to keep up with stringent speed requirements. The DMC is being tested in the laboratory and is part of CANARY, an MOAO on-sky demonstrator to be installed at the William Hershel Telescope.

Paper Details

Date Published: 16 July 2008
PDF: 12 pages
Proc. SPIE 7015, Adaptive Optics Systems, 70153X (16 July 2008); doi: 10.1117/12.787677
Show Author Affiliations
Dani Guzmán, Durham Univ. (United Kingdom)
Andrés Guesalaga, Pontificia Univ. Católica de Chile (Chile)
Richard Myers, Durham Univ. (United Kingdom)
Ray Sharples, Durham Univ. (United Kingdom)
Tim Morris, Durham Univ. (United Kingdom)
Alastair Basden, Durham Univ. (United Kingdom)
Christopher Saunter, Durham Univ. (United Kingdom)
Nigel Dipper, Durham Univ. (United Kingdom)
Laura Young, Durham Univ. (United Kingdom)
Luis Rodríguez, Instituto de Astrofisica de Canarias (Spain)
Marcos Reyes, Instituto de Astrofisica de Canarias (Spain)
Yolanda Martin, Instituto de Astrofisica de Canarias (Spain)

Published in SPIE Proceedings Vol. 7015:
Adaptive Optics Systems
Norbert Hubin; Claire E. Max; Peter L. Wizinowich, Editor(s)

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