【摘要】 分别从菲涅尔基尔霍夫和瑞利索莫非衍射积分公式出发,导出了考虑倾斜因子后会聚球面波经圆孔衍射的一般衍射积分表达式。所得公式不仅可计算衍射场的焦移,而且对弱聚焦和强聚焦情况均适用。并与Li和Wolf公式的结果进行了比较,结果证实所得公式适用广泛。更多还原

【Abstract】 Starting from the Fresnel-Kirchhoff and Rayleigh-Sommerfeld diffraction integral formulas, respectively, and in consideration of the inclination factor, the general diffraction integral expressions for convergent spherical waves diffracted at a circular aperture are derived, which are not only used to compute focal shifts of the diffraction field, but also valid for both weak and strong focusing cases, and thus have the generally applicable advantage. The results are compared with those got using the Li-Wolf formula, and the Li-Wolf formula can be regarded as an approximation of the general expressions under certain condition. The results are useful for the study of the beam precise focusing.更多还原