摘要
指出高斯光束人射时国孔衍射场的一般规律．画了不同Nw时衍射场振幅随（H，Pm）变化的函数图形。找到振幅极大值点移动的原因及焦移量的计算公式．
The general rule of the diffraction field U(P) at a circular aperture illuminated by a Gaussian beam is given. The diagram of | U (p) | as a function of (H, Pm) are drawn for different Nw. The cause for the focal point shift is given. A formula for calculation of the amount of the focal point shift is given as well.
出处
《应用激光》
CSCD
北大核心
1999年第1期15-18,共4页
Applied Laser
关键词
球面波
高斯光束
圆孔衍射
焦点移动
spherical wave
gaussian beam
diffraction at a circular aperture
focal point shift
