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Heritage Science
Fig. 1 | Heritage Science

Fig. 1

From: Listening to laser light interactions with objects of art: a novel photoacoustic approach for diagnosis and monitoring of laser cleaning interventions

Fig. 1

PA imaging for the detection of hidden underdrawings in miniature paintings. a 3D representation of the developed experimental apparatus. b Brightfield view of miniature painting (rural landscape). c MAP PA image of the painting’s underlying sketch over a central region of 2.2 × 3.8 cm2, as indicated by the white box in (b). d Brightfield view of the original pencil sketch prior to overpainting. e Brightfield view of a second miniature painting (forest landscape). f MAP PA image of the underdrawing for the indicated region in (e) with lateral dimensions equal to 3.4 × 2.4 cm2. f Original pencil sketch before overpainting. Both scalebars: 1 cm. Figure adapted from [39]

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