A Real-Time Phase Unwrapping Algorithm For EPSI Material Deformation Measurements
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
Electronic Phase-Stepped Interferometry (EPSI) is a laser-based NDE technique capable of providing out-of-plane displacement and surface topography measurements on the order of a nanometer . The technique has the potential for providing real-time measurement capabilities provided data capture and data reduction rates could be minimized. This in turn could provide an opportunity for studying and characterizing surface defect information in advanced materials such as Ti-6A1-4V and A120204-T3 using time-sequenced studies and methods. The possibility of characterizing defect precursor information may then become possible through time-evolution history studies.