Using Optical Coherence Tomography to Reveal the Hidden History of The Landsdowne Virgin of the Yarnwinder by Leonardo da Vinci and Studio - Supporting information

Abstract

Optical Coherence Tomography (OCT) was used for non-invasive examination of a well-known, yet complex, painting from the studio of Leonardo da Vinci in combination with routine imaging in various bands of electromagnetic radiation. In contrast with these techniques, OCT provides depth-resolved information. Three post-processing modalities were explored: cross-sectional views, maps of scattering from given depths, and their 3D models. Some hidden alterations of the painting due to past restorations were traced. This supporting information comprises an especially made extract (concentrated on 3 spots of 25) from reports delivered to the Opificio delle Pietre Dure in Florence where the painting was deposited for examination campaign. The reports intended to be used as a reference material for planned restoration of the painting and for historical studies. This document is composed of a descriptive part and a full set of the OCT results comprising100 adjacent OCT slices and all relevant scattering maps per one examination spot.