摘要
In this paper, Kirchhoff formula has been transformed from surface integral form into a line integral form. The new form of the formula can be applied to separate geometrical optical field from diffraction field, and reduce the time of numerical computation greatly. Based on the new form, an analytical formula of diffraction field in the far zone has been presented for the polygonal aperture illuminated by a uniform plane wave.
将经典的面积分形式的Kirchhoff公式转换为线积分形式。它不但能实现几何光学场和绕射场的分离,而且可大大减少数值计算时间。在此基础上。
