Deformable mirror controller for open-loop adaptive optics

Guzman D.; Myers R.; Sharples, R; Morris T.; Basden A.; Saunter, C; Dipper N.; Young L.; Rodríguez L.; Guesalaga A.; Reyes, M; Martinc Y.

Keywords: systems, controller, real-time, deformation, sensors, surface, laser, optics, wave, pulses, speed, sensor, control, front, requirement, mirror, shack-hartmann, 3d, illumination, loops, mirrors, adaptive, figure, open, controllers, Monochromatic, Multi-object, Deformable, Multi-objects


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.

Más información

Título de la Revista: Proceedings of SPIE - The International Society for Optical Engineering
Volumen: 7015
Editorial: SPIE
Fecha de publicación: 2008