提出非傍轴矢量光束衍射严格的电磁场理论,并以非傍轴矢量高斯光束的单缝衍射为例加以说明.与基于矢量瑞利-索末菲衍射积分推出的解析结果做了数值计算比较,表明了二者的一致性.对理论的进一步推广做了简要讨论.
The rigorous electro-magnetic diffraction theory of nonparaxial vectorial beam is proposed and illustrated by the diffraction of nonparaxial vectorial Gaussian beam diffracted at a slit. A numerical comparison with the analytical expressions based on the vectorial Rayleigh-Sommerfeld diffractiion integrals is given to show the consistency between them. A futher extension of the theory is briefly discussed.