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

Chen Xiong; Wenxin Hu; Ming Zhang; Hong Miao

doi:10.1117/1.OE.55.12.121721

5 August 2016 Real-time one-point out-of-plane displacement measurement system using electronic speckle pattern interferometry

Chen Xiong, Wenxin Hu, Ming Zhang, Hong Miao

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 121721 (August 2016). https://doi.org/10.1117/1.OE.55.12.121721

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.

Citation Download 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," Optical Engineering 55(12), 121721 (5 August 2016). https://doi.org/10.1117/1.OE.55.12.121721

Published: 5 August 2016

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