J. Guitonny et al., INFRARED DIFFERENTIAL IMAGING OF VERTICAL AND SLANTED CRACKS - MODELISATIONS AND EXPERIMENTS, Journal de physique. IV, 4(C7), 1994, pp. 607-610
A differential stimulated I.R. detection scheme is presented in order
to obtain a better contrast in crack detection on real samples whose s
urface exhibits topographical and optical irregularities. A finite ele
ment simulation confirms the magnitude and shape of the signals for ve
rtical and slanted cracks.