| 涡旋光束经过散射介质产生散斑的理论和实验研究 |
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| 引用本文： | 刘绩林,黄惠玲,陈子阳,蒲继雄,林志立.涡旋光束经过散射介质产生散斑的理论和实验研究[J].光电子．激光,2015,26(8):1626-1632. |
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| 作者姓名： | 刘绩林 黄惠玲 陈子阳 蒲继雄 林志立 |
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| 作者单位： | 华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021;华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021;华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021;华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021;华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021 |
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| 基金项目： | 国家自然科学基金(61178015,4)和福建省杰出青年科学基金(2015J06015)资助项目 (华侨大学 信息科学与工程学院,福建省光传输与变换重点实验室,福建 厦门 361021) |
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| 摘 要： | 研究了涡旋光束经过散射介质后形成的散斑特性 ．运用概率统计理论和光束传输理论,模 拟了不同拓扑电荷数的涡旋光束经过散射介质后形成的散斑,以及散射介质颗粒尺度对散斑 特性的影响。模拟结 果表明,随着涡旋光束拓扑电荷数的增大和散射介质颗粒尺度减小,形成 的散斑颗粒尺寸逐渐减小。实验上,利用螺旋相位板(SPP)产生涡旋光束,使其透过散射介 质后形成散斑。实验结果 表明,涡旋光束经过散射介质后,随着散射介质颗粒尺度减小,形成的散斑对比度逐渐增大 ；随着涡旋光束拓 扑电荷数的增大或散射介质颗粒的减小,所形成散斑的尺寸减小。实验结果与模拟结果 相吻合。
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| 关 键 词： | 物理光学 涡旋光束 散斑 对比度 衍射 |
| 收稿时间： | 2015/5/20 0:00:00 |
Investigation on the speckle produced by vortex beams through a scattering medium |
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| Affiliation: | Fujian Provincal Key Laboratory of Light Propagation and Transformation,College of Information Science and Engi neering,Huaqiao University,Xiamen 361021,China;Fujian Provincal Key Laboratory of Light Propagation and Transformation,College of Information Science and Engi neering,Huaqiao University,Xiamen 361021,China;Fujian Provincal Key Laboratory of Light Propagation and Transformation,College of Information Science and Engi neering,Huaqiao University,Xiamen 361021,China;Fujian Provincal Key Laboratory of Light Propagation and Transformation,College of Information Science and Engi neering,Huaqiao University,Xiamen 361021,China;Fujian Provincal Key Laboratory of Light Propagation and Transformation,College of Information Science and Engi neering,Huaqiao University,Xiamen 361021,China |
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| Abstract: | Theoretical and experimental study on the speckle properties formed by propagating vortices beams probability through scattering medium is demonstrate d.Based on the theory and beam transmission theory,we simulate different top ological charges of speckle formed by vortex beams.The effects of scattering med ium particle size on the speckle characteristics are analyzed. The calculated results show that the speckle sizes formed by vortex beams throug h scattering medium are smaller than those of the Gaussian beam,and the speckle sizes will reduce with increasing topological charge of vortex beam or decreasing the particle size of the scatter ing medium.In experiment,the speckle is obtained by vortex beams propagating generated b y spiral phase plate through a scattering medium.The results show that the speckle contrast i ncreases with decrease of the particle size of the scattering turbid medium.Expe rimental results agree well with theoretical simulation.The results have very important potential applications to bio-medical imaging,and a lso material detection. |
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| Keywords: | physical optics vortex beam speckle contrast diffraction |
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