基于压缩全息的散射介质中三维粒子定位  

Three-dimensional particle localization in scattering medium based on compressive holography

作　　者：葛洲 朱靖远 周文静[1] 于瀛洁[1] GE Zhou;ZHU Jingyuan;ZHOU Wenjing;YU Yingjie(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444

出　　处：《光学仪器》2024年第4期22-28,共7页Optical Instruments

基　　金：转化医学国家科学中心(上海)上海大学分中心面上项目(SUITM-202415)。

摘　　要：在三维空间中,粒子作为物质分布的基本单元,其精确定位对于医疗、环境监测、燃烧过程分析以及航空航天研究等领域至关重要。然而,散射介质中的粒子检测常面临分辨率不足和定位难的问题。因此开发了一种新的检测技术,该技术基于自动聚焦压缩全息原理,融合了压缩传感与自动对焦机制,有效提升了重建图像的轴向分辨率和粒子检测的准确性。通过模拟和实验测试,该技术的轴向分辨率误差小于3μm,确保了优异的检测精度。实验数据进一步证实,与传统的角谱法相比,本技术在观察散射介质中微粒的三维分布和评估粒子直径方面具有明显优势。本研究成果为相关领域的科学研究和实际应用提供了一种创新的技术途径。As the fundamental units of matter distribution in three-dimensional space,particles hold significant research value in the fields of medicine,environmental monitoring,combustion analysis,and aerospace research.However,detecting particles in scattering media often faces challenges such as low resolution and difficulties in localization.This study introduces a novel detection method based on autofocus compressed holography,which integrates compressed sensing and autofocus techniques to significantly enhance the axial resolution of reconstruction and the accuracy of particle detection.Through simulation and experimental validation,this method had demonstrated an axial resolution error of less than 3μm,ensuring excellent detection precision.Experimental results further confirmed that,compared to traditional angular spectrum methods,this technology offered distinct advantages in observing the three-dimensional distribution of particles in scattering media and in assessing particle diameters.The research outcomes provide an innovative technical approach for scientific research and practical applications in the related fields.

关 键 词：粒子定位 数字全息 压缩传感 散射介质 自动聚焦 

分 类 号：TH742[机械工程—光学工程]