Fig. 14 | Heritage Science

Fig. 14

From: After the paint has dried: a review of testing techniques for studying the mechanical properties of artists’ paint

Fig. 14

Schematic of a shearography setup for measuring slight thermal changes in paintings as a result of a diffuse light source. The laser light from the optical head is used to obtain the phase maps of the surface before and after the thermal loading of the painting. The phase shifting is achieved using a piezoelectric transducer driver (PZT driver) and an analog output card (DAQ). Modeled after and adapted from Klausmeyer et al. [107]

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