A Review of Atmospheric Wind Speed Measurement Techniques with Shack Hartmann Wavefront Imaging Sensor in Adaptive Optics

Abstract

Atmospheric wind speed is an turbulence parameter that determines turbulence coherence scales and plays a key role in the optimal performance of the adaptive optical system. Real time monitoring of atmospheric wind speed can allow better wavefront sensing. The use of the Shack Hartmann wavefront sensor (SHWS) for the measurement of atmospheric wind speed is well known. This article illustrates with some of the techniques that extract wind speed from the slope measurements of the SHWS. Laboratory experiments demonstrate the usefulness of the SHWS in accurately determining wind speed in real time.