Fiber Optics Reflectance Spectroscopy: A Non-destructive Technique for the Analysis of Works of Art
- 354 Downloads
From the results reported, the FORS device can be considered a useful and non-invasive tool for acquiring spectral information from paintings and wall-paintings in order to identify pigments, to analyze color changes, to monitor the status-of-health, and to detect the presence of alteration products.
Due to its dimension and weight, the FORS apparatus can be easily transported and used for collecting spectra in situ thus giving us the possibility to follow restoration work even in somewhat uncomfortable and difficult situations. Moreover, since a large number of spectra can be recorded, it offers the possibility of a statistical treatment of the data in order to discriminate among different compounds.
The recent advent of Mid-IR optical fibers might profitably extend in the following years the FORS domain to this spectral region (2.5-10μm) which should provide more exhaustive information.
KeywordsReflectance Spectrum Calcium Oxalate Alteration Product Copper Carbonate Optical Fiber Bundle
Unable to display preview. Download preview PDF.
- 1.M. Bacci, S. Baronti, A. Casini, F. Lotti, M. Picollo and O. Casazza, Non-destructive spectroscopic investigations on paintings using optical fibers, in: Mater. Res. Soc. Symp. Proc., 267, 265–283 (1992).Google Scholar
- 3.L. Bullock, Reflectance spectrophotometry for measurement of colour change, Natl. Gallery Tech. Bull., 2, 49–55 (1978).Google Scholar
- 4.D. Saunders, Colour change measurement by digital image processing, Natl. Gallery Tech. Bull., 12, 66–77 (1988).Google Scholar
- 6.M. Bacci, M. Picollo, B. Radicati and R. Bellucci, Spectroscopic imaging and non-destructive reflectance investigations using fiber optics, in: 4 th Intern. Conf. Non-Destructive Testing of Works af Art Proc., 45.1, 162–174 (1994).Google Scholar
- 7.M. Bacci, M. Picollo, S. Porcinai and B. Radicati, Non-destructive spectrophotometry and colour measurements applied to the study of the works of art, Techne, 5, 28–33 (1997).Google Scholar
- 8.M. Bacci, S. Baronti, A. Casini, P. Castagna, R Linari, A. Orlando, M. Picollo and B. Radicati, Detection of alteration products in artworks by non-destructive spectroscopic analysis, in: Mater. Res. Soc. Symp. Proc., 352, 153–159 (1995).Google Scholar
- 9.R Chiari, M. Picollo, S. Porcinai, B. Radicati and A. Orlando, Nondestructive reflectance spectroscopy in the discrimination of two authigenic minerals: gypsum and weddellite, in: 2nd Intern. Symp. The oxalate films in the conservation of works of art Proc., 379–389 (1996).Google Scholar
- 12.G. Wyszecki and W.S. Stiles, Color science: concepts and methods quantitative data and formulae, Wiley, New York (1982).Google Scholar
- 13.K. Nassau, The physics and chemistry of color, Wiley, New York (1983).Google Scholar