Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 80, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3184102
Keywords
laser beam effects; measurement by laser beam; photodetectors; portable instruments; Raman spectroscopy; reliability; surface morphology; time resolved spectroscopy
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Funding
- Ente Cassa di Risparmio di Firenze
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A small, potentially transportable prototype instrument capable of carrying out Raman, laser-induced breakdown (LIB), and laser-induced fluorescence (LIF) spectroscopy using a single pulsed laser source was developed for the analysis of cultural heritage objects. The purpose of this instrumentation is to perform fast and reliable analysis of surfaces with minimum damage to an object. For this purpose, a compact (51x203x76 mm) nanosecond Q-switched neodymium doped yttrium aluminum garnet laser (8 ns, 20 Hz, 0.01-115 mJ/pulse) was used as an irradiation source. The use of a nanosecond-gated detector sensitive between 180 and 900 nm allows the acquisition of elemental emissions in LIB spectroscopy and can also be employed for both LIF and time-resolved Raman spectroscopy. In this work, attention is focused on the description of the instrument and its optical components, and two examples of applications for the analysis of pigments and binding media used in works of art are presented.
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