OPTOELECTRONIC DEVICE/MOUNTING AND PROCESS FOR THE STRATIGRAPHICAL ANALYSIS OF THE CHEMICAL COMPOSITION OF ART OBJECTS SURFACE LAYERS MATERIAL BY LIBS TECHNIQUE

摘要

The invention relates to an optoelectronic device and a process for the stratigraphic analysis of surface layers material in art objects. According to the invention, the optoelectronic device comprises an irradiation source (1) consisting of a YAG:Nd laser, some lenses (2) for focusing the laser beam in a certain point on the surface of an object to be analyzed, an optical collector (3), a spectrograph (5) and an ICCD sensor (6), which are in connection with a computer (7). The claimed process for the stratigraphic analysis consists in applying laser pulses in a certain point on the surface of an object to be analyzed, to induce an ablation process in the shape of a plasma cloud that emits in every direction spectral lines to be collected by an optical collector and transmitted by optical fiber to a spectrograph and an ICCD sensor and finally to a computer provided with special software for the analysis of spectral lines and the identification of ionic and atomic emission lines which are characteristic to the elements present in the irradiated material.