用惠更斯－菲涅耳衍射积分对有振幅调制光束经锯齿光阑的衍射作了研究，并与经圆孔硬边光阑的衍射作了计算比较。另外讨论了锯齿光阑参数对有振幅调制光束衍射特性的影响。结果表明，锯齿光阑有较大的填充因子，能抑制轴上光强的衍射调制，并降低横向光强分布的不均匀性。

Based on the Huygens-Fresnel diffraction integral,the diffraction of laser beams with amplitude modulations passing serrated apertures is studied and compared with hard-edged circular apertures numerically. Furthermore,the effect of aperture parameters on the diffraction characteristics of laser beams with amplitude modulations is also analyzed. It is shown that,while maintaining a relatively large fill factor,the use of serrated apertures can suppress the diffraction modulations of axial intensity and reduce the nonuniformity of transversal intensity distributions.