角谱及其在衍射中的应用

Angular spectrum and application in diffraction

平面电磁波传播的角谱法,提供了波的传播过程的另一种解释.用这种方法求解某些衍射问题,会体现出它的特殊的优势.它在求解波的传播和信号处理方面也有广泛的应用.本文首先介绍了由空域到角谱域的变换原理和方法,然后对方孔衍射作了计算,并同实验结果作了比较,结果表明两者十分吻合.

The angular spectrum method of plane electromagnetic wave propagation gives another explanation for wave propagation. Solving some diffraction problems by the method will incarnate its unique advantage. The method has a wide application in wave propagation and signal processing. Firstly, this article introduces the transforming principle and means from airspace to angular spectrum space, then it calculates square hole diffraction, at last it compares the theoretical calculation with the experimental result, which turns out to be good and fit.