Using Optical Coherence Tomography to Characterize the Crack Morphology of Ceramic Glaze and Jade

Using Optical Coherence Tomography to Examine Additives in Chinese Song Jun Glaze

“…The benefit of this system is that it optimally maintains lateral resolution at all depths within a sample having a refractive index of ∼1.4 (Yang et al . ). Moreover, its high resolution is capable of imaging the copper additive present, in 4–7 μm size crystals (see Figs 3 (e), 3 (f) and (f) below).…”

“…Its light source (Broadlighter 855, Superlum, Cork, Ireland) features a 100 nm spectrum bandwidth with a central wavelength of 855 nm that, when coupled with a moderate numerical aperture objective, permits a 4.0-5.0 μm isotropic imaging resolution. The benefit of this system is that it optimally maintains lateral resolution at all depths within a sample having a refractive index of ∼1.4 (Yang et al 2012). Moreover, its high resolution is capable of imaging the copper additive present, in 4-7 μm size crystals (see Figs 3 (e), 3 (f) and 5 (f) below).…”

OCT for Examination of Artwork

“…Those studies have been continued by other authors [18,33], focusing on analysis of different phases (and phase boundaries) within the glaze layer [39,40], the presence and size of air bubbles [40], and the morphology of cracks [38]. The aim of these efforts was to provide a tool useful for identification of the origin, method of production, and thus, in some cases again, recognition of fraud.…”

“…The length of this vector, together with the second parameter representing the translucency of the object, may be used for characterization of various jades, including the detection of fraud. In parallel with this holistic study, details of the structure of jades, in particular the morphology of cracks, have been studied by Yang [38].…”

The application of macro-X-ray fluorescence and optical coherence tomography for examination of parchment manuscripts

“…For maximum penetration through the pigments, the optimum spectral window lies around 2 μm (Liang et al, 2013), but then the available axial resolution is limited. Nevertheless, OCT has been successfully employed in the examination of components of objects of cultural heritage, such as the varnish and glaze layers of easel paintings (Targowski et al, 2010a;Liang et al, 2005), stained glass (Targowski et al, 2010b), jade (Yang et al, 2012) and similar stones, as well as many others (oct4art, 2014). The subject has recently been reviewed by Targowski & Iwanicka (2012).…”