Influence of Image Processing Method on Wavefront Reconstruction Accuracy of Large-Aperture Laser

In order to improve the wavefront reconstruction accuracy of a large-aperture laser, this paper proposed an adaptive window preprocessing algorithm based on threshold center gravity method (AW-TCoG). The effects median filtering and mean spot image processing are simulated analyzed. results show that has better effect noise elimination can further reconstruction. addition, centroid detection errors laser through (CoG), (T-CoG), Windowing were studied. analysis shows that, due influence noise, is poor when CoG methods used calculate parameters, while reach 0.2λ. When using AW-TCoG in paper, be maintained within 0.1λ for different incident RMS values images with signal-to-noise ratio (SNR) levels. Compared traditional method, significantly improved.