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Optical Engineering

Real-time one-point out-of-plane displacement measurement system using electronic speckle pattern interferometry
Author(s): Chen Xiong; Wenxin Hu; Ming Zhang; Hong Miao
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Paper 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.

Paper Details

Date Published: 5 August 2016
PDF: 6 pages
Opt. Eng. 55(12) 121721 doi: 10.1117/1.OE.55.12.121721
Published in: Optical Engineering Volume 55, Issue 12
Show Author Affiliations
Chen Xiong, Univ. of Science and Technology of China (China)
Wenxin Hu, Univ. of Science and Technology of China (China)
Ming Zhang, Univ. of Science and Technology of China (China)
Hong Miao, Univ. of Science and Technology of China (China)

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