Discrimination and optimization method for near-field saturation problem of laser radar

The invention discloses a discrimination and optimization method for a near-field saturation problem of a laser radar. The judgement comprises the steps of 1, obtaining a reference line correlation coefficient; 2, calculating the spatial ranges of the atmospheric air permeability and the high extinction value; and 3, obtaining a linear correlation coefficient, and judging whether the value exceedsthe standard or not, specifically, in a horizontal detection mode, collecting and storing data, drawing a relation curve of ln(P(r)*r ) and r after geometric overlapping factors are corrected, conducting linear fitting on the curve by adopting a least square method within the height range of 0-3 km, and obtaining a linear correlation coefficient; and if the obtained linear correlation coefficient is lower than 80% or lower than 90% of the reference linear correlation coefficient, considering that the photoelectric detector enters an abnormal saturation region. The method has the characteristics that whether the detec