光谱成像技术研究室知识库

A polygon-like light-arm zone plate (PLZP) is proposed to generate the polygon-like light-arm beam, whose arms are identified clearly by using the appropriate transverse azimuthal shift . Moreover, has influence on the beam shape. The PLZP is based on the spiral phase plate of the topological charge l and the multiplexed vortex spiral phase plate of the topological charges l1 and l2. In addition, when the radius of the circular area for the filter is small or big, the number of arms is |l2-l| or |l1-l|, respectively. Furthermore, when l2 is positive or negative, the rotation direction of arms is clockwise or anticlockwise respectively. The proposed zone plates can be used to trap particles into different shapes, and applicable for optical communication. IEEE