1 February 2002 Closed-loop phase-contrast adaptive optics system using liquid crystal phase modulators: experimental results
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Abstract
Focal plane filters are being used to implement wave front sensors in high-resolution adaptive optics systems. We present experimental results obtained with a closed-loop adaptive optics system that uses a differential phase- contrast focal plane filter. The differential filter in our system is implemented using an electrically-addressed liquid-crystal spatial light modulator (LCSLM) operated in a phase-mostly mode. Two additional phase-mostly LCSLM devices are used in our experiment. One is used as a phase screen to introduce simulated turbulence into the propagating input beam, and the other is used as the wave front corrector driven by closed-loop feedback signals from the phase- contrast wave front sensor. This paper describes the system implementation and presents some preliminary experimental results.
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Michael K. Giles, Anthony J. Seward, Todd Giles, "Closed-loop phase-contrast adaptive optics system using liquid crystal phase modulators: experimental results", Proc. SPIE 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III, (1 February 2002); doi: 10.1117/12.454710; https://doi.org/10.1117/12.454710
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