Special Section on Speckle-Based Metrology

Real-time one-point out-of-plane displacement measurement system using electronic speckle pattern interferometry

[+] Author Affiliations
Chen Xiong, Wenxin Hu, Ming Zhang, Hong Miao

University of Science and Technology of China, Key Laboratory of Mechanical Behavior and Design of Materials (CAS), Department of Modern Mechanics, Huangshan Road, Shushan District, Hefei, Anhui 230027, China

Opt. Eng. 55(12), 121721 (Aug 05, 2016). doi:10.1117/1.OE.55.12.121721
History: Received April 29, 2016; Accepted July 6, 2016
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Abstract.  We propose an electronic speckle pattern interferometry-based measurement method in which a hardware device in the reference arm is used to track the out-of-plane displacement in the objective arm. We developed a real-time one-point out-of-plane displacement measurement system, which uses a Michelson interferometer, a lead zirconate titanate (PZT) device, a charge-coupled device camera, and a tracking control system. The system works by checking the movement of carrier fringes, and the PZT is used to track the displacement. We also developed an efficient tracking algorithm based on direction judgment and correlation computation to determine whether the PZT is activated and the distance that the PZT is ordered to move. Our experimental results demonstrate the effectiveness of the system, and finally, we discuss the detailed mechanism of the system.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Chen Xiong ; Wenxin Hu ; Ming Zhang and Hong Miao
"Real-time one-point out-of-plane displacement measurement system using electronic speckle pattern interferometry", Opt. Eng. 55(12), 121721 (Aug 05, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.121721


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