摘要:
轴对称矢量光束是一种空间非均匀偏振光束,中心光强为零,经物镜聚焦后能在焦点附近产生空间场分量.在高变迹系数光学系统成像情况下,与线偏光、圆偏光相比,径向偏振光与光瞳滤波技术及图像复原技术结合,能获得较小焦斑,提高横向分辨力.介绍了轴对称矢量光束的特性,基于电偶极子辐射模型和矢量衍射理论研究了轴对称矢量光束经高数值孔径物镜聚焦后的特性,系统介绍了基于轴对称矢量光束实现光斑紧聚焦的几种方法,并简述了轴对称矢量光束在差动共焦超分辨成像领域的研究设想.
Abstract:
Cylindrical vector beams are spatially inhomogeneously polarized, whose intensity in the center is zero, and can produce special field components in the vicinity of focus when they are focused by an objective lens. In the case of optical system with high apodization factor, radial polarization can achieve tight focus by adapting pupil filtering and image restoration technology compared with linear and circular polarization. The properties of cylindrical vector beams are introduced. Based on electric dipole radiation model and vector diffraction theory, focal field properties for cylindrical vector beams focused by a high-NA objective lens are discussed. The method to achieve tight focus by cylindrical vector beams is presented. Furthermore, we consider it feasible for the super resolution laser polarized differential confocal microscopy by adapting the differential confocal microscopy, and put forward the prospective development.
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