Digital vs. analog comparison of adaptive optics systems

Douglas P. Looze

doi:10.1117/12.672416

28 June 2006 Digital vs. analog comparison of adaptive optics systems

Douglas P. Looze

Proceedings Volume 6272, Advances in Adaptive Optics II; 627238 (2006) https://doi.org/10.1117/12.672416
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

This paper presents an equivalent discrete-time model that combines the D-A converter, DM, and WFS. The performance of the adaptive optics loop can then be evaluated in terms of the discrete-time (Z) closed-loop transfer functions of the feedback loop. The closed-loop transfer functions using this discrete-time model are compared to those obtained from an analog model. A simulation shows that the digital model produces accurate stability evaluations.

Citation Download Citation

Douglas P. Looze "Digital vs. analog comparison of adaptive optics systems", Proc. SPIE 6272, Advances in Adaptive Optics II, 627238 (28 June 2006); https://doi.org/10.1117/12.672416

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