Influence of average speckle size on measurement of in-plane displacement

Jiayao Yang; Xinxin Xie; Aiyang Lin; Yongqi Luo; Wenhao Wang; Xinran Wu; Jinming Luo; Dingnan Deng

doi:10.1117/12.3030410

3 June 2024 Influence of average speckle size on measurement of in-plane displacement

Jiayao Yang, Xinxin Xie, Aiyang Lin, Yongqi Luo, Wenhao Wang, Xinran Wu, Jinming Luo, Dingnan Deng

Proceedings Volume 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024); 131820G (2024) https://doi.org/10.1117/12.3030410
Event: 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 2024, Kunming, China

Abstract

Average speckle size is an important statistical parameter representing the lateral profile feature of laser speckle, which has an impact on the measurement of in-plane displacement of scattering object. In this experiment, a measurement system of in-plane displacement through scattering object has been setup. By varying propagation distance and scattering surface diameter, laser speckles are collected by CCD camera and autocorrelated to obtain the estimation values of average speckle size, and then the in-plane displacements are measured by digital image correlation method. Afterward, the influence of average speckle size on in-plane displacement measurement is discussed, and the result shows that the larger the average speckle size is, the greater the measurement error is, and the smaller the measurement limit is, which has a certain reference value for practical applications in the displacement and deformation measurement of objects.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiayao Yang, Xinxin Xie, Aiyang Lin, Yongqi Luo, Wenhao Wang, Xinran Wu, Jinming Luo, and Dingnan Deng "Influence of average speckle size on measurement of in-plane displacement", Proc. SPIE 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 131820G (3 June 2024); https://doi.org/10.1117/12.3030410

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KEYWORDS

Speckle

Laser scattering

Digital image correlation

Scattering

Autocorrelation

Speckle pattern

Distance measurement

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