Structural and optical properties of wood and wood finishes studied using optical coherence tomography: application to an 18th century Italian violin
Structural and optical properties of wood and wood finishes studied using optical coherence tomography: application to an 18th century Italian violin
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DOI：
10.1364/ao.48.006485
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发表时间：
2009-11-20
期刊：
影响因子：
1.9
通讯作者：
Elias, Mady
中科院分区：
文献类型：
--
作者：
Latour, Gael;Echard, Jean-Philippe;Elias, Mady
光学相干层析成像（OCT）是特别有吸引力的文化遗产文物的研究，因为它是非侵入性和非破坏性。我们已经开发出一个原始的全场时域OCT系统，专门用于调查的清漆和彩绘文物：干涉Mirau目标允许一个执行扫描，而不移动的艺术作品。轴向和横向的高分辨率（分别为1.5和1 μ m）是很好地适应调查结构（颜料颗粒，木纤维等）的检测。照明光谱在可见光范围内（中心在630 nm，150 nm宽），以潜在地允许我们对色素颗粒执行光谱OCT。对涂有传统面漆的木材样品的检测证明了该系统检测颗粒、表征层厚度以及对清漆下方的三维木材结构成像的能力。最后应用OCT对一把18世纪世纪意大利小提琴的涂层木材表面进行了原位研究，为小提琴的保护处理提供了重要信息。(C)2009年美国光学学会
Optical coherence tomography (OCT) is especially attractive for the study of cultural heritage artifacts because it is noninvasive and nondestructive. We have developed an original full-field time-domain OCT system dedicated to the investigation of varnished and painted artifacts: an interferometric Mirau objective allows one to perform the scan without moving the works of art. The axial and transverse high resolution (respectively, 1.5 and 1 mu m) are well adapted to the detection of the investigated structures (pigment grains, wood fibers, etc.). The illumination spectrum is in the visible range (centered at 630 nm, 150 nm wide) to potentially allow us to perform spectroscopic OCT on pigment particles. The examination of wood samples coated with a traditional finish, demonstrates the ability of the system to detect particles, characterize layers thickness, and image the three-dimensional wood structures below the varnishes. OCT has finally been applied to study in situ the coated wood surface of an 18th century Italian violin and provides important information for its conservation treatment. (C) 2009 Optical Society of America