|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Technical Division Student Poster Competition
||SPG-43: Cross Polarization for Enhanced Digital Image Correlation Fidelity
||William LePage, John Shaw, Samantha Daly
|On-Site Speaker (Planned)
Cross polarization is presented as a new and easily implementable technique for improving optical digital image correlation (DIC) results by increasing contrast and preventing saturated pixels. An experimental investigation into the effect of cross polarization on two- and three-dimensional DIC displacement accuracy and correlation confidence interval is presented. In this study, airbrush paint was used as the patterning method, and linear polarizers were installed orthogonally on both the light sources and camera lenses. Smooth spots on the sample can be troublesome sources of glare that cause saturated pixels and ultimately loss of sub-pixel measurement resolution. With cross polarization, however, sources of glare reflect polarized light that is subsequently attenuated by the perpendicular polarized filters on the camera lenses. In addition to cross-polarization, other means for improving DIC quality are discussed.
||Definite: None Selected