Dual-sided, Laser-marked, Speckled Calibration Targets

Correlated Solutions continues our tradition of DIC innovation with new dual-sided laser-marked speckled calibration targets. These new targets enable two facing VIC-3D systems to be calibrated together which combines data into a common coordinate system. By utilizing two facing VIC-3D systems and imaging two sides of a specimen under tension or compression load, it is now possible to measure the change in the cross-sectional area with much higher accuracy without having any contact with the sample. This new calibration method may also be applied to applications where multiple stereo systems need to be calibrated together (e.g., side-by-side or around a cylinder). In addition to being more versatile and user-friendly, this new technique provides approximately 10x increase in the accuracy of the estimation of the location(s) of the other system(s) compared to the traditional marker technique. This is due to the speckle pattern providing a much greater number of data points which improves overall confidence and accuracy. Furthermore, no scaling information from the speckled target is required because the angles and translations from the inputted (random) tilts are computed from each system. Speckled targets can also be used to combine data from multiple stereo systems even when there is no overlapping data. For example, this procedure may be applied to an application where two ends of an airplane wing are measured simultaneously, and the data is required to be accurately combined into one common coordinate system. This comprehensive measurement ability is vital for product testing and FEA validation.

Contact one of our sales engineers today to discuss how these new targets can improve your testing.