Latour Gaël, Echard Jean-Philippe, Soulier Balthazar, Emond Isabelle, Vaiedelich Stéphane, Elias Mady
Institut des Nanosciences de Paris (INSP), UMR CNRS 7588, Université Pierre et Marie Curie, 140 Rue de Lourmel, 75015 Paris, France.
Appl Opt. 2009 Nov 20;48(33):6485-91. doi: 10.1364/AO.48.006485.
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 microm) 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.
光学相干断层扫描（OCT）对于文化遗产文物的研究特别有吸引力，因为它是非侵入性和非破坏性的。我们开发了一种专门用于研究涂漆和彩绘文物的原创全场时域OCT系统：干涉式Mirau物镜允许在不移动艺术品的情况下进行扫描。轴向和横向高分辨率（分别为1.5微米和1微米）非常适合检测所研究的结构（颜料颗粒、木纤维等）。照明光谱在可见光范围内（中心波长为630纳米，宽度为150纳米），这有可能使我们能够对颜料颗粒进行光谱OCT。对涂有传统涂层的木材样本进行检查，证明了该系统能够检测颗粒、表征层厚度，并对清漆下方的三维木材结构进行成像。OCT最终被应用于原位研究一把18世纪意大利小提琴的涂漆木材表面，并为其保护处理提供了重要信息。
