Compared with other methods, the Fourier-Besselmethod is of the advantages of fast calculation, simple math format, easy understanding and application.
与其他方法相比，傅里叶-贝塞尔方法具有计算速度快，数学形式简练，易于理解和应用的优点。
2
The main method of evaluation is Bessel formula.
重复性评定方法，主要是贝塞尔公式。
3
Our calculations show that the Bessel-Gauss beam can be produced in the focused plane of the ring apertured Gaussian beam, this method is efficient and simple.