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.
CITATION STYLE
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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