Focal shift of the partially coherent vortex beams focused by an aperture lens |
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| Authors: | Xiaoyun Liu |
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| Institution: | a College of Science, Shenyang Ligong University, Shenyang, Liaoning 110168, China
b Department of Electronic Science and Technology, College of Information Science and Engineering, Institute of Optics and Photonics, Huaqiao University, Quanzhou, Fujian 362021, China |
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| Abstract: | Based on the propagation law of partially coherent beams, the propagation equations of the partially coherent vortex beams focused by an aperture lens are derived. Based on these equations, the focal shift of partially coherent vortex beams is studied, and illustrative numerical results are given. It is found that the focal shift of the partially coherent vortex is dependent not only on the Fresnel number but also on the relative coherent length and the topological charge of the vortex. |
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| Keywords: | Focal shift Vortex Diffractive optics Coherence |
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