Increased bandwidth liquid crystal MEMS adaptive optics system

David Charles Dayton; Stephen Browne; John D. Gonglewski; Sergio Raffaele Restaino

doi:10.1117/12.565876

11 November 2004 Increased bandwidth liquid crystal MEMS adaptive optics system

David Charles Dayton, Stephen Browne, John D. Gonglewski, Sergio Raffaele Restaino

Proceedings Volume 5572, Optics in Atmospheric Propagation and Adaptive Systems VII; (2004) https://doi.org/10.1117/12.565876
Event: Remote Sensing, 2004, Maspalomas, Canary Islands, Spain

Abstract

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.

Citation Download Citation

David Charles Dayton, Stephen Browne, John D. Gonglewski, and Sergio Raffaele Restaino "Increased bandwidth liquid crystal MEMS adaptive optics system", Proc. SPIE 5572, Optics in Atmospheric Propagation and Adaptive Systems VII, (11 November 2004); https://doi.org/10.1117/12.565876

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