Time-Resolved IR Video Imaging with Synchronized Scanned Laser Heating

Kuo, P. K.; Oppenheim, I. C.; Favro, L. D.; Feng, Zhaoying; Thomas, R. L.; Hartikainen, J.; Inglehart, L. J.

doi:10.1007/978-3-540-48181-2_135

Cited by 5 publications

(2 citation statements)

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“…Substituting equation ( 13) into equation (15), and representing equation ( 15) using finite difference elements, we can have…”

Section: D Finite Difference Modellingmentioning

confidence: 99%

“…Previous workers have generated heating at a spot on a surface using electron or ion beams [6,7], a focused arc lamp or a laser beam [8][9][10][11][12][13][14][15][16]. For line heating [17][18][19][20][21][22][23][24][25], methods have included a line infrared lamp, heated wire (radio frequency induction heating) [17,18] or a line of air jets [19].…”

Section: Introductionmentioning

confidence: 99%

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Crack imaging by scanning laser-line thermography and laser-spot thermography

Almond

Rees

2011

Meas. Sci. Technol.

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The thermographic images of laser heated spots or lines are perturbed by nearby cracks, providing NDE techniques for crack detection. Scanning with a laser line, rather than a laser spot, results in a substantial reduction in inspection time. 3D finite difference modelling results are presented that show the sensitivity of the laser line thermography technique to cracks of varying lengths, depths and openings. A novel crack imaging technique is presented that is based on assembling second spatial derivative thermal images of a scanned laser line. Experimental results show the new technique to image cracks with openings as small as a few micrometres. The scanning time of the laser line thermography technique is shown to be over an order of magnitude smaller than that of the laser spot thermography technique whilst producing crack images of similar quality.

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“…Substituting equation ( 13) into equation (15), and representing equation ( 15) using finite difference elements, we can have…”

Section: D Finite Difference Modellingmentioning

confidence: 99%