1. Optical coherence tomography and non-linear microscopy for paintings – a study of the complementary capabilities and laser degradation effects

    Optical coherence tomography and non-linear microscopy for paintings – a study of the complementary capabilities and laser degradation effects

    his paper examines for the first time the potential complementary imaging capabilities of Optical coherence tomography (OCT) and non-linear microscopy (NLM) for multi-modal 3D examination of paintings following the successful application of OCT to the in situ, non-invasive examination of varnish and paint stratigraphy of historic paintings and the promising initial studies of NLM of varnish samples. OCT provides image contrast through the optical scattering and absorption properties of materials, while NLM provides molecular information through multi-photon fluorescence and higher harmonics generation (second and third harmonic generation). OCT is well-established in the in situ non-invasive imaging of the stratigraphy of ...

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