用线性和非线性光学方法对明胶基现代绘画材料进行非侵入式地层分析

IF 4.6 Q1 OPTICS Journal of Physics-Photonics Pub Date : 2024-06-23 DOI:10.1088/2515-7647/ad5772
Diego Quintero Balbas, Laura Maestro-Guijarro, Paula María Carmona-Quiroga, Mohamed Oujja, Marta Castillejo, Francesca Bettini, Simone Porcinai and Jana Striova
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引用次数: 0

摘要

对绘画等多色表面进行地层分析时,往往需要采集样本,以便提供有关层序和组成的一致结果。基于线性和非线性光学技术的非侵入式方法限制了对文物材料的去除。最近,光学相干断层扫描(OCT)已成为文物科学家的首选,因为它是研究透明或半透明层的一种安全、快速的替代方法。然而,非线性光学显微镜(NLOM)技术中的多光子激发荧光(MPEF)模式已成为实现相同目的的一种有前途的工具。在这里,我们探索了线性(OCT 和共焦拉曼显微光谱(CRM))和非线性(NLOM-MPEF)光学方法在研究模拟样品中的明胶层和一幅超现实主义艺术家 1939 年的画作方面的能力。此外,还利用光纤反射光谱和激光诱导荧光(LIF)对模仿画作地层的模拟样本和从支架上分离的六幅画作碎片的光学行为进行了研究。通过 OCT、CRM 和 MPEF 获得的模拟厚度值证明了这些方法从毫米到微米尺度的互补性和局限性(如 CRM 的强荧光发射)。此外,通过对绘画碎片进行 LIF 光谱分析,确定了明胶的存在,NLOM-MPEF 证实了其作为一种非侵入性技术对基于明胶的地层系统进行研究的适用性。
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Non-invasive stratigraphic analyzes of gelatine-based modern painting materials with linear and nonlinear optical methods
Stratigraphic analyzes of polychrome surfaces, such as paintings, often need samples to offer consistent results regarding the sequence and composition of the layers. Non-invasive methodologies based on linear and nonlinear optical techniques limit material removal from the objects. Recently, optical coherence tomography (OCT) has become the preferred choice of heritage scientists because it is a safe and fast alternative for studying transparent or semi-transparent layers. Yet, nonlinear optical microscopy (NLOM)) technique in its modality of multiphoton excitation fluorescence (MPEF) has emerged as a promising tool for the same purpose. Here, we explored linear (OCT and confocal Raman microspectroscopy (CRM)) and nonlinear (NLOM-MPEF) optical methods’ capability to investigate gelatine-based layers in mock-up samples and a painting dated 1939 by an artist from the Surrealistic entourage. The optical behavior of mock-up samples that imitate the painting stratigraphy and of six painting fragments detached from the support was also investigated with fiber optics reflectance spectroscopy and laser induced fluorescence (LIF). Thickness values from the mock-ups obtained with OCT, CRM, and MPEF have provided evidence of the complementarity, from a millimetric to a micrometric scale, and the limitations (e.g. strong fluorescence emission in CRM) of the methods. Moreover, the presence of gelatine was ascertained by LIF spectroscopy applied to the painting fragments and NLOM-MPEF confirmed its suitability as a non-invasive technique for investigating gelatine-based stratigraphic systems.
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来源期刊
CiteScore
10.70
自引率
0.00%
发文量
27
审稿时长
12 weeks
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