Atmospheric turbulance detection laser rader using position-sensitive detector

The present invention discloses a laser radar to detect atmospheric turbulence using one kind of position sensitive detectors, relates Lidar Atmospheric Turbulence refractive index structure constant C n 2 profile and atmosphere The coherence length r 0 . Lidar present invention employs a pulsed laser as a radiation source, the telescope aperture double Rayleigh backscattering, focused by the reflecting prism on the position sensitive detector, the position coordinate signal converted by the A / D converter into a digital signal, the micro- processor, to obtain C n 2 profile and the atmospheric coherence length r 0 . Advantage of the present invention are: directly obtaining the center of gravity position coordinates of the light spot, compared to the prior art, saves a lot of the read image data and the centroid calculation time, thereby obtaining a plurality of data signals from a back wave optical laser pulse. Back wave signal data from a plurality of laser pulses to calculate the refractive index structure constant C in the atmosphere at various distances n 2 profile and atmospheric coherence length r 0 , and the direction detection flexible, high spatial resolution.