Non-contact optical dynamic measurements at different ranges: a review

• Published in: Acta mechanica Sinica Vol. 37; no. 4; pp. 537 - 553
• Main Authors: Fu, Yu, Shang, Yang, Hu, Wenxin, Li, Bin, Yu, Qifeng
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences 01-04-2021; Springer Nature B.V; Shenzhen Key Laboratory of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China%Hunan Provincial Key Laboratory of Image Measurement and Vision Navigation,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China%Shenzhen Key Laboratory of Intelligent Optical Measurement and Detection,Shenzhen University,Shenzhen 518060,China; Hunan Provincial Key Laboratory of Image Measurement and Vision Navigation,College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China
• Edition: English ed.
• Subjects: Amplitudes; Classical and Continuum Physics; Computational Intelligence; Deformation; Engineering; Engineering Fluid Dynamics; Industrial applications; Interferometry; Measurement techniques; Motion perception; Review Paper; Theoretical and Applied Mechanics; Vibration measurement; Vibration measurement; Digital image correlation; High-speed imaging; Videometrics; Laser interferometry
• ISSN: 0567-7718; 1614-3116
• DOI: 10.1007/s10409-021-01102-1

Optical dynamic measurements are widely used for non-contact vibration, continuous deformation, or moving objects. Various measurement techniques were developed for different deformation amplitudes. This paper reviews three types of technique for different measurement ranges: interferometric techniques for deformation or vibration (nanometer to sub-millimeter amplitude) whose measurement accuracies rely on phase extraction of interferometric signal; imaging based techniques for deformation or vibration (micrometer to centimeter amplitude) with the aid of moiré, structured light, and man-made speckles, whose sensitivities is from 1/100 to 1/10 pixel; and videometrics for large deformation or movement detection (greater than centimeter amplitude). Many research groups have improved measurement capabilities for these three techniques to meet particular industrial application requirements.
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