微粒衍射成像仿真系统研究  

Research on Particle Diffraction Imaging Simulation System

作　　者：徐耀辉 刘靖[1,2] 王文进 文于华 田芃[1] 汪舒亭[1,2] Xin-Hua Hu XU Yaohui;LIU Jing;WANG Wenjin;WEN Yuhua;TIAN Peng;WANG Shuting;Xin-Hua Hu(Institute of Advanced Optics,Hunan Institute of Science and Technology,Yueyang 414006,China;School of Information Science and Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China;Department of Physics,East Carolina University,Greenville,NC 27858,USA)

机构地区：[1]湖南理工学院先进光学研究所,湖南岳阳414006 [2]湖南理工学院信息科学与工程学院,湖南岳阳414006 [3]Department of Physics,East Carolina University,Greenville,NC 27858,USA

出　　处：《湖南理工学院学报（自然科学版）》2020年第1期51-56,共6页Journal of Hunan Institute of Science and Technology(Natural Sciences)

基　　金：湖南省教育厅科学研究重点项目(19A198);湖南理工学院研究生科研创新项目(YCX2018A04)。

摘　　要：针对现有光学设备采集衍射图像的局限,基于DDA理论和ZEMAX光迹追迹方法构建了微粒衍射成像仿真系统.通过对不同尺寸微球仿真与实测衍射图像的对比发现,两者的轮廓高度一致,验证了仿真系统的可行性;通过对相同形状不同大小圆柱体衍射图像的计算看出,随着圆柱体尺寸增大光斑数量明显增加;通过对不同形状微粒衍射图像的仿真得出,微粒形状变化时对应的散射光斑也随之变化.结果表明,微粒的结构和组成可通过可视化的衍射图像差异来识别,为后续微粒的准确识别、精细分类和定量分析奠定了技术基础.Aiming at the limitations of diffractive image acquisition by existing optical equipment,a particle diffraction imaging simulation system based on DDA theory and ZEMAX light trace method is constructed.The simulation of microspheres with different sizes is compared with the measured diffraction images,and it is found that the contours of the two microspheres are the same,which verifies the feasibility of the simulation system.The calculation of diffraction images of cylinders with the same shape and different sizes show that the number of light spots increases obviously with the increase of cylinder size,and the simulation of diffraction images of particles with different shapes illustrates that the scattered light spot of the particles changes with the change of shape.The results demonstrate that the structure and composition of the particles can be identified by visualized diffraction image differences,which lays a technical foundation for accurate identification,fine classification and quantitative analysis of subsequent particles.

关 键 词：离散偶极子近似 光迹追踪 偏振衍射图像 MUELLER矩阵 

分 类 号：O433.5[机械工程—光学工程]