Archeological mortars are often composed of highly inhomogeneous materials and detailed analysis in most cases can be quite difficult. In this work, a Laser-Induced Breakdown Spectroscopy (LIBS) equipment with microscopic-scale spatial resolution was used to image the distribution of elements on real archeological samples of mortars and construction material used in the foundations of the Smederevo Fortress (Republic of Serbia). A double-pulse Nd:YAG at the fundamental wavelength (λ = 1064 nm) and a CCD spectrometer coupled with a commercial microscope were used to generate the plasma and acquire the LIBS spectra. Thanks to the combined use of an unsupervised clustering algorithm and the calibration-free procedure, the results obtained show that it is possible to obtain a good discrimination between materials of different composition, allowing a quick classification for further mineral-petrographic investigations.

考古砂浆通常由高度不均匀的材料组成，在大多数情况下进行详细分析可能相当困难。在这项工作中，使用具有微观空间分辨率的激光诱导击穿光谱 (LIBS) 设备对 Smederevo 堡垒（塞尔维亚共和国）地基中使用的砂浆和建筑材料的真实考古样品的元素分布进行成像. 使用基本波长 (λ = 1064 nm) 的双脉冲 Nd:YAG 和与商用显微镜耦合的 CCD 光谱仪来产生等离子体并获取 LIBS 光谱。由于结合使用无监督聚类算法和免校准程序，获得的结果表明可以在不同成分的材料之间获得良好的区分，