Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5007774 | Optics and Lasers in Engineering | 2017 | 7 Pages |
Abstract
Shearing speckle pattern interferometry is a full-field speckle interferometric technique used to determine surface displacement derivatives. In this paper, a new measurement system of real-time heterodyne shearography interferometry is presented. This system combined with heterodyne measurement, shearography interferometry and time domain signal processing technology can dynamically detect the out-of-plane displacement gradient. The principles and system arrangement are described. Using the Jones matrix, the mathematical expression of light intensity distribution passing through this system is deduced. A preliminary experiment was performed to demonstrate the performance of this new device, and simulations were conducted using the finite element method. Comparison of results shows that quantitative measurement of the displacement derivative has been achieved.
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Authors
Xu Wang, Zhan Gao, Jie Qin, Xiaoqiong Zhang, Shanwei Yang,