基于广义惠更斯-菲涅尔衍射理论, 导出径向偏振螺旋贝塞尔光束的光场表达式, 研究了该光束的传输特性和传输过程中光束偏振态的变化, 及其通过扇形障碍物后的自重建特性.理论分析和数值计算发现：径向偏振螺旋贝塞尔光束在自由空间传输时, 在一定传输区域内, 光束以空心光束的形态绕光轴做离轴螺旋传输, 光束的发散角为零并一直保持着径向偏振的特性; 在光束的自重建过程中, 始终保持离轴螺旋传输特性, 随着传输距离的增加, 原本在遮挡区域消失的能量, 被逐渐衍射至障碍物遮挡区域的相反位置.

Based on the generalized Huygens-Fresnel diffraction theory, the intensity expression of the radially polarized spiral Bessel beam is derived. The transmission characteristics, the change of the polarization state and self-reconstruction characteristics of the beam during transmission are studied. It is found that ,by the theoretical analysis and numerical calculation, when the radially polarized spiral Bessel beam is transmitted in free space, the beam is spirally transmitted around the optical axis in the form of a hollow beam and the divergence angle of the beam is zero in a certain transmission region. In addition, the characteristics of radial polarization are maintained during the transmission process. The off-axis spiral transmission characteristic is always maintained and the energy conservation law is followed in the self-reconstruction process of the beam. As the transmission distance increases, the energy originally disappeared in the occlusion region is gradually diffracted to the opposite position of the obstacle occlusion area.