In this contribution the application of Optical Coherence Tomography (OCT) as a complementary tool for Láser Induced Breakdown Spectroscopy (LIBS) depth profile or stratigraphy analysis. It is shown how OCT may be used for preliminary evaluation of locations of perspective LIBS examination, as an aid for proper adjusting the system and mostly for absolute in-depth calibration of LIBS data. Additionally, the inspection of OCT images of transparent part of paint layer combined with the analysis of the ablation rates during the LIBS depth profile analysis enables one to distinguish certain strata in the sample in order to aid in the analysis of LIBS data. The application of this approach to revealing stratigraphy of a historic easel painting is presented and discussed. © 2011 Taylor & Francis Group, London.
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