摘要
The description of a plane wave diffracted by a circular aperture is directly started from the Maxwell＇s equations. Based on the vector angular spectrum representation of Maxwell＇s equations, the diffracted plane wave is decomposed into the TE and TM terms. The analytical TE and TM terms in the far field are presented by stationary phase. As the TE and TM terms are orthogonal to each other in the far field, their sum constitutes the so-called Airy disc pattern. Therefore, this research reveals the composition of Airv disc. which is beneficial to deepen and enhance the recognition of the classical diffraction problem.
The description of a plane wave diffracted by a circular aperture is directly started from the Maxwell＇s equations. Based on the vector angular spectrum representation of Maxwell＇s equations, the diffracted plane wave is decomposed into the TE and TM terms. The analytical TE and TM terms in the far field are presented by stationary phase. As the TE and TM terms are orthogonal to each other in the far field, their sum constitutes the so-called Airy disc pattern. Therefore, this research reveals the composition of Airv disc. which is beneficial to deepen and enhance the recognition of the classical diffraction problem.
基金
the Scientific Research Fund of Zhejiang Provincial Education Department under Grant No.20060677
