Measurement of scintillation effect of light propagating through atmospheric turbulence by Shank-Hartmann sensor

Shack-Hartmann sensor is traditionally used for wave-front detection.The method that it is used to measure scintillation effect of light propagating through atmospheric turbulence is proposed based on the linearity characteristic of its charge-coupled device between output signal and light exposure in the dynamic range.Intensity scintillation experiments were preliminarily carried out in atmospheric boundary layer over 1000 meter horizontal path.Some measurement results were observed.Firstly,intensity fluctuation variance measured from experiments agrees with subaerial turbulence fluctuation attribute.Secondly,the comparison between Shack-Hartmann sensor and large aperture scintillometer shows the correlation coefficient of refractive index structure parameter reaches 0.838.Finally is the analysis of power spectrum of intensity fluctuation in different sub-apertures.So the reliability of Shack-Hartmann wave-front sensor used to measure scintillation effect of light in the atmospheric turbulence is firmly approved.