摘要
光学相干层析(Optical Coherence Tomography,OCT)作为一种具有微米级分辨率和毫米级量程的层析成像技术,可用于透明/半透明物体(如聚合物材料、陶瓷材料、复合材料等)内部微观结构信息的探测与成像。在结合了相衬方法后,该技术还可利用干涉信号的相位敏感特性,实现纳米级位移场与微应变级形变场的高灵敏度测量,用于材料内部全场力学行为的表征与测试。在近十余年发展中,相衬OCT已逐渐成为无损检测领域的研究热点,受到了国际相关学者的广泛关注。本文旨在介绍相衬OCT基本原理及其在检测领域典型应用(包括多层结构热变形场层析测量、聚合物内部固化过程可视化监测、材料内部微缺陷高灵敏辨识等)的基础上,对其未来发展进行探讨与展望。
Optical coherence tomography(OCT)is an emerging imaging technique that measures internal structures of transparent and semitransparent objects,e.g.polymers,ceramics,and composites,with micrometer resolution and millimeter range.After combining with the method of phase-contrast,the technique is also available for measuring nanometer level displacement field and micro-strain level deformation field inside objects due to the high sensitivity of interference phase.Since it can be employed for characterizing and testing full-field mechanical behaviors of inside materials,the technique has gained rapid development and more attention in the last decade,which has already become a hot topic in non-destructive testing.In this review,the basic principle of phase-contrast OCT was firstly described,some typical applications were then introduced,e.g.depth-resolved thermal deformation measurement of multilayer structure,curing processing visualization inside polymer,and micro defect identification inside materials,and some future developments were finally discussed.
作者
谢胜利
廖文建
白玉磊
梁勇
董博
Xie Sheng-li;Liao Wen-jian;Bai Yu-lei;Liang Yong;Dong Bo(School of Automation,Guangdong University of Technology,Guangzhou 510006,China;Faculty of Information Technology,Macao University of Science and Technology,Macao 999078,China)
出处
《广东工业大学学报》
CAS
2021年第6期20-28,共9页
Journal of Guangdong University of Technology
基金
国家自然科学基金资助项目(11802008,61727810,61705047)
广东省自然科学基金资助项目(2021A1515012598,2021A1515011945)。
关键词
光学相干层析
无损检测
全场形变测量
固化过程监测
内部缺陷检测
optical coherence tomography
non-destructive testing
full-field deformation measurement
curing process visualization
internal defect identification
