Fluorescence spectroscopy has been successfully applied to the identification of colorants in oil paintings and murals due to the advantage of non-destructive detection, but the traditional equipment uses xenon lamp as the excitation light source, which is energy inefficient in the process of using, and the monochromatic light output power is weak and unstable. This paper proposes the use of ultra-continuous spectrum broad-band tunable laser with fiber optic sensors to achieve effective detection of weak fluorescence signals of silk dyes, compared with the traditional 3D-fluorescence equipment, single-wavelength excitation light output power is greatly increased, higher monochromaticity and energy density to achieve better spatial resolution and faster detection efficiency, while adding fiber optic sensors can be done to achieve the surface of the painted artifacts in situ non-destructive detection. The proposed method can detect more weak fluorescence information under the comparison results of multiple dyed silk samples with different fluorescence emission effects. Acknowledgement: This project is funded by National Key R&D Program of China No.2020YFE0204600.
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