Deformable mirror controller for open-loop adaptive optics

Dani Guzmán; Andrés Guesalaga; Richard Myers; Ray Sharples; Tim Morris; Alastair Basden; Christopher Saunter; Nigel Dipper; Laura Young; Luis Rodríguez; Marcos Reyes; Yolanda Martin

doi:10.1117/12.787677

16 July 2008 Deformable mirror controller for open-loop adaptive optics

Dani Guzmán, Andrés Guesalaga, Richard Myers, Ray Sharples, Tim Morris, Alastair Basden, Christopher Saunter, Nigel Dipper, Laura Young, Luis Rodríguez, Marcos Reyes, Yolanda Martin

Author Affiliations +

Proceedings Volume 7015, Adaptive Optics Systems; 70153X (2008) https://doi.org/10.1117/12.787677
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

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.

Citation Download Citation

Dani Guzmán, Andrés Guesalaga, Richard Myers, Ray Sharples, Tim Morris, Alastair Basden, Christopher Saunter, Nigel Dipper, Laura Young, Luis Rodríguez, Marcos Reyes, and Yolanda Martin "Deformable mirror controller for open-loop adaptive optics", Proc. SPIE 7015, Adaptive Optics Systems, 70153X (16 July 2008); https://doi.org/10.1117/12.787677

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