Multiple mirror control system

Details Multiple mirror control system Multiple mirror control system

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5490.1374h&link_type=abstract

Advancements in Adaptive Optics. Edited by Domenico B. Calia, Brent L. Ellerbroek, and Roberto Ragazzoni. Proceedings of the SPI

Physics

Optics

Scientific paper

This paper describes the current control system of the multi-conjugate adaptive optics (MCAO) test bench system that is being developed at the University of Victoria, BC, Canada. The design and analysis of a control system for an AO system employing a Micro-Electro-Mechanical-System (MEMS) based deformable mirror and a PI tilt mirror is presented. This paper focuses on modal control of one deformable mirror and a tilt mirror with a Shack-Hartmann wave front sensor. Diagrams of how all the components work together as a control system are given. Bandwidth measurements for a single delay integrator controller and for a matched delay integrator are presented. Analysis shows that matching the delays of the integrator to the delays of the optical feedback loop provides considerable improvement in bandwidth.

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