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本文以方形激光输入、圆形均匀焦斑输出为例，分析比较了整体式和阵列式衍射光学器件获取圆形均匀焦斑的能力通过在阵列式器件方形单元间附加线性相移来改变各子焦斑的相互位置、重叠区域，从而逼近于一定直径的近圆形均匀焦斑该方法将二维问题转化为一维，减少计算量采用基于爬山法与模拟退火法相结合的混合算法设计相位分布结果表明了该方法的有效性，并具有获得任意形状均匀焦斑的灵活性
In this paper, the output of square laser input and circular uniform focal spot is taken as an example, the capability of monolithic and arrayed diffractive optics to obtain circular uniform focal spot is analyzed and compared by adding linear phase shift between square elements of array device Sub-focal spot mutual position, overlap area, and thus approximate to a certain diameter of nearly circular uniform focal spot This method will be two-dimensional problems into one-dimensional, reducing the amount of computation using a combination of hiking and simulated annealing algorithm based hybrid algorithm The design phase distribution results show that the method is effective and has the flexibility of obtaining a uniform focal spot of arbitrary shape