【摘要】 利用矢量瑞利——索墨菲衍射积分公式推出了空心光束半屏衍射场中衍射场的解析表达式,并数值模拟了衍射场的光强空间分布及强度奇点的相关属性。结果表明:衍射场光强已不再是空心分布,发生了很大的改变;随着衍射传输距离的增大,衍射场光强的空间分布退化为类TEM02模场分布;随着传输距离的增大,衍射场观察区域内光强奇点出现湮灭等。更多还原

【Abstract】 An analysis expression of diffraction field produced by vector hollow beams diffracted by a half-screen based on the vector Rayleigh-Sommerfeld diffraction integral formula is presented in this paper and some properties of the diffraction intensity distribution and some singularities had been numerical simulated.These results have shown that the spatial distribution varied with the increasing propagation distance and its distribution is likely as one of the model TEM02 in the far diffraction field and can observe the annihilation of the singularity intensity.更多还原