摘要
研究轴对称光束垂直入射的圆孔衍射花样,建立数学模型数值模拟了圆孔衍射的光强分布解,通过对图像解的分析可知,光入射圆孔后在传播过程中不断地发生衍射现象,最后衍化成具有高斯分布的形式。光在孔径后边缘处仍有衍射现象,即屏后附近光振动的复振幅不为零,而基尔霍夫边界条件只是一个近似结果。
The round-aperture diffraction for the normal incidence of axial-symmetry light beam is investigated in this paper. The distribution of light intensity is brought out by using of the Simpson method and the computer numerical simulation. Through the analysis of these figures, it is found that the light is diffracted ceaselessly after passing the aperture, and finally it will be turned into the format of Gauss-distribution. At the edge behind the aperture; light is still diffracted, and the complex amplitude of the light is not zero nearby the back screen. Therefore, the Kirchhoff boundary condition is only an approximated result.
出处
《大连大学学报》
2009年第3期68-70,共3页
Journal of Dalian University
关键词
圆孔衍射
衍射花样
光强分布
round-aperture diffraction
diffraction pattern
distribution of light intensity
