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Fast searching measurement of absolute displacement based on submicron-aperture fiber point-diffraction interferometer

The submicron-aperture fiber point-diffraction interferometer (SFPDI) can be applied to realize the measurement of three-dimensional absolute displacement within large range, in which the performance of point-diffraction wavefront and numerical iterative algorithm for displacement reconstruction determines the achievable measurement accuracy, reliability and efficiency of the system. A method based on fast searching particle swarm optimization (FS-PSO) algorithm is proposed to realize the rapid measurement of three-dimensional absolute displacement. Based on the SFPDI with two submicron-aperture fiber pairs, FS-PSO method and the corresponding model of the SFPDI, the measurement accuracy, reliability and efficiency of the SFPDI system are significantly improved, making it more feasible for practical application. The effect of point-diffraction wavefront error on the measurement is analyzed. The error of point-diffraction wavefront obtained in the experiment is in the order of 1x10(-4). (the wavelength. is 532 nm), and the corresponding displacement measurement error is smaller than 0.03 mu m. Both the numerical simulation and comparison experiments have been carried out to demonstrate the accuracy and feasibility of the proposed SFPDI system, high measurement accuracy in the order of 0.1 mu m, convergence rate (similar to 90.0%) and efficiency have been realized with the proposed method, providing a feasible way to measure three-dimensional absolute displacement in the case of no guide rail.

Identiferoai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/625741
Date26 June 2017
CreatorsWang, Daodang, Wang, Zhichao, Liang, Rongguang, Kong, Ming, Zhao, Jun, Zhao, Jufeng, Mo, Linhai, Li, Wei
ContributorsUniv Arizona, Coll Opt Sci, Zhejiang Univ. (China), China Jiliang Univ. (China), College of Optical Sciences, The Univ. of Arizona (United States), China Jiliang Univ. (China), China Jiliang Univ. (China), Hangzhou Dianzi Univ. (China), Volkslift (China) Co. Ltd. (China), China Jiliang Univ. (China)
PublisherSPIE-INT SOC OPTICAL ENGINEERING
Source SetsUniversity of Arizona
LanguageEnglish
Detected LanguageEnglish
TypeArticle
Rights© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
Relationhttp://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2268052

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