基于光场成像的多物理场测试技术研究进展  

Progress in Multi-Physics Optical Diagnostic Technology Based on Light Field Imaging

作　　者：嵇煜 赵洲 许晟明 姚春惠 何钰伦 方华[1,2] 吴沛林 曾飞 陈沐谷 施圣贤 JI Yu;ZHAO Zhou;XU Shengming;YAO Chunhui;He Yulun;FANG Hua;WU Peilin;ZENG Fei;CHEN Muku;SHI Shengxian(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Engine Turbo Research,Aero-Engine Corporation of China Hunan Power Machinery Research Institute,Zhuzhou 412002,China;Hunan Chiopt Optotech Co.,Ltd,Changsha 410116,China;Hunan Provincial Key Laboratory of Medium and Small Aero Engine Impeller Machinery,Aero-Engine Corporation of China Hunan Power Machinery Research Institute,Zhuzhou 412002,China;Department of Electrical Engineering,City University of Hong Kong,Hong Kong 999077,China;Centre for Biosystems,Neuroscience,and Nanotechnology,City University of Hong Kong,Hong Kong 999077,China;State Key Laboratory of Terahertz and Millimeter Waves,City University of Hong Kong,Hong Kong 999077,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]中国航发湖南动力机械研究所发动机涡轮研究部,湖南株洲412002 [3]湖南长步道光学科技有限公司,湖南长沙410116 [4]中国航发湖南动力机械研究所中小型航空发动机叶轮机械湖南省重点实验室,湖南株洲412002 [5]香港城市大学电机工程系,中国香港999077 [6]香港城市大学生物系统、神经科学和纳米技术中心,中国香港999077 [7]香港城市大学太赫兹及毫米波国家重点实验室,中国香港999077

出　　处：《气体物理》2024年第3期1-34,共34页Physics of Gases

基　　金：国家自然科学基金(11472175,11772197,12172222,12302368);国家科技重大专项(J2019-V-0004-0095);航空发动机及燃气轮机基础科学中心项目(2023-B-V-002-001);中国航空发动机集团产学研项目(HFZL2020CXY014-2);航空科学基金(20230046057018);中国博士后科学基金(2023M742231);国家资助博士后研究人员计划(GZC20231561)。

摘　　要：光场成像原理的发展为多物理场测试提供了新的思路与方向。光场相机基于光场成像原理,在主镜头与感光芯片之间增加了微透镜阵列,实现了对入射光线角度信息的捕获。研究人员发展了基于光场成像原理的多物理场测试技术。首先,介绍了光场粒子图像测速技术,使用光场相机拍摄复杂三维流场的粒子图像,随后采用一系列三维体校准、重构和互相关算法获得三维速度场。该技术在保证测量精度的同时实现对三维三分量速度场的捕获,并且能够有效减少相机数量和光学窗口的要求,实现对受限空间内部进行速度场测量。其次,介绍了将光场相机在形貌测量领域中的应用。光场相机通过单个相机、单次拍摄可以获取物体表面的三维点云信息,在极大程度上缩短测量时间的同时,简化成像设备,实现对叶片气膜孔的三维形貌测量。然后,将光场相机应用于温度测量领域,可以简化分光手段,从而完成测温系统的精简,实现单个传感器对光谱强度和角度信息的同时记录。最后,对光场多物理场测试技术进行了总结,并对基于内窥光场成像与超透镜的光场测试技术进行了展望。The development of light-field imaging principles has provided new insights and directions for diagnostic multi-physical fields.The light-field camera,based on the principles of light-field imaging,captures the angle information of incident light rays,through a micro-lens array between the main lens and the sensor.Researchers have developed various multi-physics diagnostic techniques based on the principles of light-field imaging.Firstly,the light-field particle image velocimetry(LF-PIV)technique was introduced.It utilized a light-field camera to capture particle images of a complex three-dimensional flow field.Applying three-dimensional calibration,reconstruction and cross-correlation algorithms subsequently gene-rated the three-dimensional velocity field.It ensures measurement accuracy while capturing a three-dimensional three-component velocity field.Moreover,it effectively reduces the device size for velocity field measurements within constrained spaces.Secondly,the application of light-field cameras in the field of shape measurements was introduced.The light-field camera can capture three-dimensional point cloud information of the object′s surface by a single camera and a single shot.This not only significantly reduces measurement time but also simplifies imaging equipment,enabling three-dimensional topography measurement of film-cooling holes.Thirdly,applying light-field camera in the field of temperature measurement can simplify spectral separation methods,leading to the streamlining of temperature measurement systems.Finally,the light-field multi-physics diagnostic technology was summarized,and the endoscopic light-field and meta-lens-based light-field diagnostic technology was prospected.

关 键 词：光场成像 三维测量 粒子图像测速 多光谱测温 形貌测量 

分 类 号：O3[理学—力学]