Surface-Displacement Imaging Using Optical Beam Deflection
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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.
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Abstract
Important information on subsurface material parameters and structure is contained in the dynamics of surface motion. One of the most important techniques in quantitative nondestructive evaluation is optical sensing of surface displacement; it is noncontact, sensitive, fast, and capable of high spatial resolution. Laser interferometers in various configurations provide the ultimate in sensitivity [1]; however, due to their complexity and lack of flexibility, they may not be the first choice in applications where ultimate sensitivity is not required.