Raman spectroscopy is a molecular vibrational spectroscopic technique which provides complementary information to FT-IR. It is used in the cultural heritage field for the vast identification and characterization of inorganic and/or limited organic materials. The main drawback of this technique is related to high fluorescence emissions which may compete with the scattering phenomena and cover any useful vibrational signals expecially when using short wavelength laser sources. The 532 nm laser system in a micro-Raman set-up is particularly adapt to low fluorescing inorganic based substrates, such as ceramics, bronzes, minerals, gems and stone materials.
archaeological object and site, architecture, art, decorative arts, manuscript, mosaics, painting, papyrus, sculpture, textile
ceramic (clay/mud brick/terracotta/earthenware/stoneware/porcelain), glass, stone, metal and metallurgical By-Products, pigment
The Jasco portable micro-Raman is equipped with a Nd:YAG laser source emitting at 532 nm. The system is equipped with a CCD ANDOR detector maintained at −50° C with a Peltier cooler. The use of optical fibres, Olympus objectives (50x or 20x), suitable notch filters and a CCD camera which permits the image of the...