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Depth-Resolved Multilayer Pigment Identification in Paintings: Combined Use of Laser-Induced Breakdown Spectroscopy (LIBS) and Optical Coherence Tomography (OCT)
- Source :
- Applied Spectroscopy. 67:960-972
- Publication Year :
- 2013
- Publisher :
- SAGE Publications, 2013.
-
Abstract
- A detailed feasibility study on the combined use of laser-induced breakdown spectroscopy with optical coherence tomography (LIBS/OCT), aiming at a realistic depth-resolved elemental analysis of multilayer stratigraphies in paintings, is presented. Merging a high spectral resolution LIBS system with a high spatial resolution spectral OCT instrument significantly enhances the quality and accuracy of stratigraphic analysis. First, OCT mapping is employed prior to LIBS analysis in order to assist the selection of specific areas of interest on the painting surface to be examined in detail. Then, intertwined with LIBS, the OCT instrument is used as a precise profilometer for the online determination of the depth of the ablation crater formed by individual laser pulses during LIBS depth-profile analysis. This approach is novel and enables (i) the precise in-depth scaling of elemental concentration profiles, and (ii) the recognition of layer boundaries by estimating the corresponding differences in material ablation rate. Additionally, the latter is supported, within the transparency of the object, by analysis of the OCT cross-sectional views. The potential of this method is illustrated by presenting results on the detailed analysis of the structure of an historic painting on canvas performed to aid planned restoration of the artwork.
- Subjects :
- Materials science
medicine.diagnostic_test
business.industry
010401 analytical chemistry
02 engineering and technology
021001 nanoscience & nanotechnology
Laser
01 natural sciences
0104 chemical sciences
law.invention
Interferometry
Optics
Optical coherence tomography
Elemental analysis
law
medicine
Profilometer
Laser-induced breakdown spectroscopy
Spectral resolution
0210 nano-technology
business
Instrumentation
Image resolution
Spectroscopy
Subjects
Details
- ISSN :
- 19433530 and 00037028
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- Applied Spectroscopy
- Accession number :
- edsair.doi.dedup.....cb5904fdb3da26a7ccd30805e4e5d4f0