A study of correction method to the pincushion distortion based on dual galvanometer LiDAR scanning system

We demonstrate a pincushion distortion correction algorithm and analyzes the reason of the pincushion distortion caused by scanning system deeply via the geometric method and vector method respectively, in allusion to the dual galvanometer LiDAR scanning system. Furthermore, the scanning trajectory simulation results and experimental phenomenon are coincident. Aiming at the pincushion distortion, the simulation results of the intermediate process was given through deducing the relationships of the scanning track and galvanometer deflection Angle, and between the deflection angle and galvanometer control. Finally, the correction formula of double galvanometer control voltage was concluded. The scanning trace was rectified by controlling the correction model of voltage and the simulation result proves the validity of the pincushion distortion correction algorithm. By comparing the scanning trace before with after corrected, the simulation results of the correction quantity are given and the pincushion distortion is corrected completely.