Journal
APPLIED OPTICS
Volume 61, Issue 2, Pages 615-622Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.445824
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [11772302, 12072073, 12172200, 12172332]
- Fundamental Research Funds for the Provincial Universities of Zhejiang [RFA2020013]
Ask authors/readers for more resources
In this study, an ESPI system consisting of three sub-interferometers is proposed for simultaneous measurement of three displacement components and in-plane strain fields. The system utilizes a 3CCD color camera, a specially designed shifting stage, and three lasers to achieve the measurement, and the experimental results demonstrate the utility of the system.
Electronic speckle pattern interferometry (ESPI), a well-established technique for micro-deformation measurement, can be used to determine both in-plane and out-of-plane displacement components. Although many works in ESPI have been reported for three-dimensional (3D) displacement measurement, few works have focused on the simultaneous measurement of 3D deformation fields. Here we present an ESPI system that consists of three sub-interferometers for simultaneous measurement of all three displacement components and in-plane strain fields. A 3CCD color camera, a specially designed shifting stage, and three lasers with optimal wavelengths are used in this system. The lasers and 3CCD camera provide independent interferograms with different color signals, while the shifting stage allows the sub-interferometers to achieve simultaneous phase shifting. The results of color separation and experimental measurement demonstrate the utility of the system. (C) 2022 Optica Publishing Group
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available