Characterising latency for AO optical sensors: an implementation

Thomas Dixon; Francis Bennet; Ian Price; Francois Rigaut

doi:10.1117/12.2232151

27 July 2016 Characterising latency for AO optical sensors: an implementation

Thomas Dixon, Francis Bennet, Ian Price, Francois Rigaut

Proceedings Volume 9909, Adaptive Optics Systems V; 99096T (2016) https://doi.org/10.1117/12.2232151
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The latency of electro-optical components is of high importance in the design of Adaptive Optics systems, as it limits the performance of the control loop. There exists a need for a latency measurement method that can be constructed with simple components found in most Adaptive Optics labs that still provides a measurement accurate to sub-microseconds. Through a combination of research and experimentation, potential methodologies were investigated with the aim of producing reliable latency measurements. This document will discuss one such method, involving coupling a LED pulse output and detected pulse input signals to the same clock for easy comparison. For this method, a proof-of-concept was developed using MATLAB and small analogue electronics, and the performance characterised. This characterisation showed that although there is some merit to the method, improvements are necessary to increase the precision of the measurement to a level usable in Adaptive Optics systems.

Citation Download Citation

Thomas Dixon, Francis Bennet, Ian Price, and Francois Rigaut "Characterising latency for AO optical sensors: an implementation", Proc. SPIE 9909, Adaptive Optics Systems V, 99096T (27 July 2016); https://doi.org/10.1117/12.2232151

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