一束线激光投射到双平面棋盘格的相纸上时，用CCD拍图，对高斯光束的分析，光条的横截面光强近似服从高斯分布，那么光条的中心可以认为在光强分布的峰值点，所以采用加权平均的方法得到两个光条中心坐标（u1’,v1’）和（u2’,v2’）(When a beam of line laser is projected onto a photographic paper of a double-planar checkerboard, the Gaussian beam is analyzed using a CCD camera. The cross-sectional light intensity of the light bar is approximately Gaussian, and the center of the light bar can be considered as the distribution of light intensity. The peak point, so using the weighted average method to get the center coordinates of the two light bars (u1', v1') and (u2', v2'))