MULTISPECTRAL SPECTROSCOPY THROUGH TUNABLE MULTISPECTRAL REFLECTION BETWEEN 200NM AND 6000NM

摘要

The present invention relates to a powerful tool of investigation in art objects and particularly in paintings which enables both tuneable multispectral real time imaging, between 200 nm and 6000 nm, as well as simultaneous multispectral spectroscopic data acquisition from the same investigated region. At the same time, spectroscopic data are collected from every point of the area under examination between 200 nm and 6000 nm with a 5nm step through grey level measurements, after adequate infrared Reflectance (%R) curve calibration, taking into account the spectral detectability range of the infrared detector as well as the output power distribution of the radiation coming out through the micrometer slit assembly, of the monochromator in use. Inorganic pigments can thus be identified and their physicochemical behaviour directly compared to the corresponding infrared images at selected wavelengths inside this area.