A cross-dichroic-prism-based multi-perspective digital image correlation system

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Abstract

A robust three-perspective digital image correlation (DIC) system based on a cross dichroic prism and single three charge-coupled device (3CCD) color cameras is proposed in this study. Images from three different perspectives are captured by a 3CCD camera using the cross dichroic prism and two planar mirrors. These images are then separated by different CCD channels to perform correlation calculation with an existing multi-camera DIC algorithm. The proposed system is considerably more compact than the conventional multi-camera DIC system. In addition, the proposed system has no loss of spatial resolution compared with the traditional single-camera DIC system. The principle and experimental setup of the proposed system is described in detail, and a series of tests is performed to validate the system. Experimental results show that the proposed system performs well in displacement, morphology, and strain measurement.

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Dan, X., Li, J., Zhao, Q., Sun, F., Wang, Y., & Yang, L. (2019). A cross-dichroic-prism-based multi-perspective digital image correlation system. Applied Sciences (Switzerland), 9(4). https://doi.org/10.3390/app9040673

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