Author Affiliations
Abstract
1 Sci-Tech Archaeology Center, Laboratory of Micro-Nano Optoelectronic Materials and Devices, Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 Henan Provincial Institute of Cultural Relics and Archaeology, Zhengzhou 450000, China
In this Letter, we report a combination of non-invasive analysis of the cross-section structure, phase, and chemical composition combining optical coherence tomography (OCT) with spectroscopic methods such as X-ray analytical microscope (μ-XRF) and micro-Raman spectroscopy (μ-RS), which allow us to effectively and conveniently identify the colorants used for each color region and the glass-making process of an ancient multicolored stratified glass eye bead. The results reveal that the sophisticated colors of the glass bead arise from the transition metals and chemical compound crystals deliberately added in the same base glass and carefully adjusted by the glass maker to obtain four colors. We also propose and discuss the provenance of the glass bead. It was probably introduced to China through the Northern Silk Road from Egypt or the Eastern Mediterranean areas about 1400 years ago. The combined multi-analytical technique is the promising approach for precious cultural heritage research.
multi-spectroscopic methods combination of non-invasive analysis ancient stratified glass cross-section structure chemical composition glass-making process Chinese Optics Letters
2020, 18(9): 090001
1 中国科学院上海光学精密机械研究所科技考古中心, 上海 201800
2 中国科学院大学, 北京100049
3 河南省文物考古研究院, 河南 郑州 450000
为探索基于光学相干层析成像(OCT)技术对古代青瓷釉层物理结构的分类, 综合应用OCT技术、X射线荧光光谱分析(XRF)技术、扫描电子显微镜-能谱分析(SEM-EDS)技术和激光拉曼光谱(LRS)技术对河南省宝丰县清凉寺窑址出土的金元时期青瓷和钧瓷样品残片进行了分析。根据获取的样品釉层物理结构OCT灰度图像特征对釉层进行定性分类, 利用图像纹理分析技术对釉层OCT图像进行量化表征, 并根据所确定的纹理特征参数进行主成分分析。对根据OCT图像对瓷釉的分类结果与根据XRF获得的釉层化学成分的分类结果进行比较, 结合SEM-EDS和LRS分析结果讨论了釉层材料学特征与OCT图像特征之间的内在联系。
测量 光学相干层析成像 图像纹理分析 主成分分析 清凉寺窑址
1 中国科学院上海光学精密机械研究所科技考古中心, 上海 201800
2 中国科学院大学, 北京 100049
3 河南省文物考古研究院, 河南 郑州 450000
为了验证将光学相干层析(OCT)成像技术应用于古代陶瓷无损检测，将OCT图像表现的釉面的断面特征用于古代陶瓷类别区分的可行性，利用宽波长频域OCT成像系统对选自5个窑口的8个不同釉系、色系的瓷片进行测试，得到了样品的断面结构图像，并分析了OCT图像中的气泡大小和分布、强散射颗粒分布、釉层均匀性、透射率、釉层的分层等特征。实验结果显示8个古代瓷釉样品OCT成像特征差异明显，说明OCT成像技术能基于断层图像特征对瓷釉的釉系、窑口进行区分。
测量 光学相干层析 无损成像 瓷釉
