Fig. 14
From: Pulsed infrared thermographic study of a Chinese Bronze Lei
The first derivative of the fitting curve (orange) and experimental data (blue) as a function of time in log–log scale (a, c, e) and the thermal response calculated from a double-layer thermal quadrupole model (b, d, f) for the three marked positions with \({l}_{1}=\) 0.1, 0.8 and 2.5 mm, respectively