【摘要】 为了测量平顶光斑和高斯光斑的半径,采用刀口法进行了理论分析和实验验证,并且提出了新的迭代算法。刀口的间距与光斑半径存在正比关系,求出了相应的比例系数。在实际测量中,测得刀口的间距后再乘上相应的系数就可以得到光斑半径。结果表明,将迭代法进行推广,可用于求任意已知强度分布式的光斑半径。更多还原

【Abstract】 In order to measure the radius of hat spots and Gaussian spots,knife-edge method was adopted for the theoretical analysis and experimental verification.A new iterative algorithm was proposed.The distance of knife-edge is in direct proportion to the radius of spot.The corresponding scale factors were calculated.It is convenient to obtain the radius of spots by multiplying a corresponding scale factor to the distance of knife-edge.The result shows this iterative algorithm is also valid for any spot whose distribution of intensity is already known.更多还原