Thermal-wave methods for nondestructive inspection and process control

Laurence M. Flath; Steven M. Shepard

doi:10.1117/12.230394

19 January 1996 Thermal wave methods for nondestructive inspection and process control

Proceedings Volume 2599, Three-Dimensional and Unconventional Imaging for Industrial Inspection and Metrology; (1996) https://doi.org/10.1117/12.230394
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

Thermal wave imaging typically refers to a number of techniques in which a sample to be nondestructively tested is actively heated with either a pulsed or stepped source, and the time dependence of either the heating or cooling of the sample is monitored with an IR camera. Although these techniques have been used in manufacturing applications, the methods used for data analysis have been either too computation intensive for real time implementation, or too qualitative and subjective to be used reliably. Dynamic histogram analysis offers an alternative method for data interpretation that is computationally simple, yet quantitative and repeatable. Features which may be weak or ambiguous in the actual image can be easily identified using a data volume based on the time evolution of the histogram.

Citation Download Citation

Laurence M. Flath and Steven M. Shepard "Thermal wave methods for nondestructive inspection and process control", Proc. SPIE 2599, Three-Dimensional and Unconventional Imaging for Industrial Inspection and Metrology, (19 January 1996); https://doi.org/10.1117/12.230394

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