https://doi.org/10.1140/epjp/s13360-024-05688-w
Regular Article
Evaluating the influence of step size in macro-raman mapping experiments
1
Raman Spectroscopy Research Group, Department of Chemistry, Ghent University, Campus Sterre, S12, Krijgslaan 281, 9000, Ghent, Belgium
2
Archaeometry Research Group, Department of Archaeology, Ghent University, Campus Ufo, Sint-Pietersnieuwstraat 35, 9000, Ghent, Belgium
Received:
13
March
2024
Accepted:
25
September
2024
Published online:
21
October
2024
Macro-Raman mapping has been proposed as a novel tool to obtain molecular maps of cultural heritage objects. By using this approach, it is possible to obtain maps that reveal the distribution of the molecules in the object under study. When setting up a macro-Raman mapping experiment of a painting, next to the dimensions of the area to study, the motor step size has to be selected. Not only does this determine the total number of spectra that is recorded, but also does this determine the achieved resolution of the Raman map. If the step size is set too large, there is the risk of missing information, as some points on the art object are not analysed. On the other hand, if set too small, the number of data points is too large, putting serious constraints on resources: total measurement time and computer memory, for both, recording the data cube as well as post-processing the spectra. Therefore, the influence of the step size as a function of the radius of the laser spot is evaluated when recording a Raman map of a watercolour painting on paper.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
