Tunable double annular shaped cylindrical vector beam generator

Cylindrical vector beam has gained amounts of interest in recent years due to its unique focusing characteristic. In this paper, a novel optical setup based on axicons is proposed to convert linearly polarized beam into cylindrical vector beam directly. The radius of the output beam can be adjusted by changing the distance of axicons. We clarify the design philosophy in details and certify the feasibility of the proposed structure by using LightTools™ software. This work is important for micro-manipulation and microscope.