Terahertz time-domain imaging (THz-TDI) has been applied for a hidden portrait and other subsurface composition layers of an 18th century (18C) easel painting by Nicolai Abildgaard, the most important 18C Danish neoclassical painter historical mythological subjects. For first time, real on imaged THz-TDI, with unexpected richness detail. THz C- B-scans have compared images obtained x-ray radiography invasive cross-sectional imaging, leading to deeper understanding strengths limitations this...

Abstract Terahertz imaging is unlocking unique capabilities for the analysis of cultural heritage artifacts. This paper uses terahertz time-domain study a gilded wooden artifact, providing means to perform stratigraphic analysis, yielding information about composition presence certain materials identifiable through their THz spectral fingerprint, as well alterations that have been performed over time. Due limited available many historic artifacts, data can be obtained presented technique...

Reflection terahertz frequency modulated continuous waves scanner (300 GHz) has been proficiently optimized for imaging two easel paintings of different age. The information content the obtained THz images fully inspected by selecting appropriate image parameter. At same time, a new data processing developed improving level detail held axial parametric means Gaussian fit reflected signals. By carefully weighting signals as function optical path, amplitude corrected positioning object surface...

We present a broad literature review on the uses of terahertz radiation for inspection architectural art, as well building structures. As an example in this field, we also include original results non-destructive assessment conservation intervention murals Konstantinbasilika Trier, Germany while using time-of-flight spectroscopy.

Terahertz time-domain imaging (THz-TDI) and spectral-domain optical coherence tomography (SD-OCT) are two techniques capable of providing 3D datasets from which depth profiles cross-sectional images an object can be derived. They novel photonics technologies particular relevance to the field heritage science, for comprehension stratigraphic structure a cultural may help in understanding its artistic technology state preservation. The differences depth, view, axial/lateral resolutions provide...

Terahertz spectroscopy, a noninvasive and nondestructive analytical technique used in art conservation restoration, can provide compelling data concerning the composition condition of culturally valuable historical objects. spectral databases modern ancient artists' pigments exist but lack explanations for origins unique features. Solid-state density functional theory simulations insight into molecular intermolecular forces that dominate observed absorption features as well reveal deviations...

Scientific analysis of panel paintings could provide key information to art historians and conservators about the composition condition constituent layers. Knowledge structure, stratigraphy, subsurface layers these objects is highly relevant conservation measures, when stability problems such as delamination or internal cracking are considered. Terahertz time-domain imaging (THz-TDI) in reflection geometry capable highlighting interfaces between a stratigraphic buildup, thus makes structural...

In this study a European lacquerware replica has been investigated by terahertz (THz) reflectometric imaging. The inspected is wooden panel covered multiple complex layers of lacquers and plaster. Utilizing pulsed Terahertz Time-Domain Imaging (THz-TDI) in reflection mode, we observe non-invasively buried the replica, including internal structure itself. We find that non-invasive imaging analysis can provide conservators with important information about condition compositional layers,...

In this paper, the study of a plasma diagnostic system based on THz time domain spectroscopy technique is presented. Such could potentially probe large part electromagnetic spectrum currently covered by several other diagnostics in single measurement. This feature, keeping mind basic requirements for nuclear fusion experiments, such as robustness and hard environment applicability, well durability low maintenance, makes great interest. A conceptual design THz-TDS has been developed, starting...

Heritage science aims to study cultural heritage objects through the developing and studying conservation issues advise new restauration approach. In addition, development of tools is one major accesses, which allows increase knowledge in archaeology characterize materials. This paper focused on a Laser-Induced Breakdown Spectroscopy-Laser-Induced Fluorescence-Raman Spectroscopy (LIBS-LIF-Raman) portable instrument for supporting campaigns when extensive measurements on-site decision-making...

In consequence of the flooding Loing river in 2016, some storage areas for Musée Girodet were submerged, with 3000 artworks affected. Following this, painting Le Jeune Trioson (nineteenth century, attributed to school Anne-Louis De Roucy Trioson) developed severe blanching varnish, over dark background particular. An initial non-contact investigation a spectral-domain optical coherence tomographic system operating near-infrared range (830–1020 nm) gave valuable insights into development this...

The cleaning of paintings is carried out when an artwork legibility jeopardized. This can be due to inevitable deposits on their surface or by a modification the varnish optical properties as result ageing. For most delicate restoration cases, laser processing was widely studied alternative traditional techniques painting cleaning. It encompasses two distinct approaches: first one involves photo-thermal disaggregation unwanted material with Er:YAG (2.94 μm) and eventually its chemical...

Terahertz time-domain reflectometry has been applied to the investigation of a tempera panel replica. The technique given useful information about surface as well internal structure artworks. Ultrathin layers leaf gold are penetrated by THz radiation, revealing underlying wood structure.

A late 17 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> century white European lacquered cabinet, attributed to the Gérard Dagly workshop and belonging Barbara Piert-Borgers private collection of Far-East lacquerware, has been investigated by means terahertz time domain imaging (THz-TDI), giving new insights into its composition.