Increased bandwidth liquid crystal MEMS adaptive optics system

Details Increased bandwidth liquid crystal MEMS adaptive optics system Increased bandwidth liquid crystal MEMS adaptive optics system

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5572..303d&link_type=abstract

Optics in Atmospheric Propagation and Adaptive Systems VII. Edited by Gonglewski, John D.; Stein, Karin. Proceedings of the SP

Physics

Optics

Scientific paper

In previous work we demonstrated a nematic liquid crystal MEMS adaptive optics system for observation of low earth orbit satellites. However the closed loop bandwidth was limited to 40 Hz due to latency in the interface electronics between the control computer and the device driver. This bandwidth is marginal for compensation of atmospheric turbulence effects, where the Greenwood frequency is often in excess of 100 Hz. Recently the interface has been redesigned and as a result we have been able to nearly double the bandwidth. In this paper we describe laboratory experiments with the faster system.

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