Method of three-dimensional scanning using fluorescence induced by electromagnetic radiation and a device for executing this method

A method of scanning using fluorescence induced by electromagnetic radiation in which there is generated a primary beam (1) of electromagnetic radiation from a source (2), the primary beam (1) is directed to at least one part of the measured sample (3), and by using at least one detector (4, 5) fluorescence electromagnetic radiation is detected exiting from the material of the measured sample (3), and on the basis of its spectral analysis the elemental composition of the measured sample (3) is determined, characterized in that the shape of the primary beam (1) is flattened, the flattened primary beam (1) is directed to the measured sample (3) at an angle (α) whose magnitude ranges from 0° to 90°, whereupon the penetration of the flattened primary beam (1) and the measured sample (3) forms the measured area (6), inside which there is emitted fluorescent electromagnetic radiation, the fluorescence electromagnetic radiation is shielded using a shielding means (7) positioned between the measured sample (3) and the shielded detector (4), wherein the shielding means (7) is provided with at least one permeable area (8) to create a secondary beam (9) of fluorescence electromagnetic radiation and for a clear connection of the site of radiation of the secondary beam (9) of the measured area (6) and the site of impact of the secondary beam (9) on the shielded detector (4), subsequently on the shielded detector (4) there is detected a secondary beam (9) exiting from the permeable area (8), whereupon on the basis of the shielded detector (4) of the measured data, on the value of the angle (α) and the position of the permeable region (8) towards the measured sample (3) and/or the shielded detector (4), the elemental composition is modeled in at least part of the volume of the measured sample (3).