A method for generating double-ring-shaped vector beams
Chen Huan1, Ling Xiao-Hui2, Chen Zhi-Hong1, Li Qian-Guang1, Lv Hao1, Yu Hua-Qing1, Yi Xu-Nong1, †, 
(a) Schematic diagram of the experimental setup for generating double-ring-shaped vector beams, where GLP is a Glan laser polarizer, and CCD is a charge-coupled device. (b) The grey level image displayed on the SLM. (c) The intensity distribution of the laser beam reflected by the SLM. (d) The intensity distribution of the beam emerging from the PBP element with
