提出用两组相互正交的光楔列阵系统获得方形光斑,其特点是光斑尺寸在一定范围内连续可调,形状不受入射光截面形状影响,光斑强度空间分布均匀性好,且受入射光强度分布的影响很小。对该系统作了详细的理论分析和数值计算。

A novel system used to obtain a square focus spot has been developed, which is composed of a pair of segmented wadge arrays that are mutually perpendicular. The features of this system are that, the size of the focus spot can be varied continuously within a certain extent,the shape of the focus spot may not be influenced by the shape of the cross section of the incident beam, and the intensity distribution of the focus spot is of high uniformity and is influenced very weakly by the intensity distribution of the incident beam. In this paper, detailed theoretical analyses and numerical calculations for this system are presented.