Category: Art

1. OCT Companies in the News

   (2 articles) Superlum

   (2 articles) Thorlabs

   (1 articles) Dalsa

   (1 articles) OTI Ophthalmic Technologies Inc.

2. Organizations in the News

   (19 articles) Nicolaus Copernicus University

   (8 articles) University of Kent

   (6 articles) Pierre & Marie Curie University

   (3 articles) OCT4ART

   (3 articles) Massachusetts Institute of Technology

   (2 articles) Institut d'Optique

   (2 articles) Upper Austrian Research GmbH

   (1 articles) Victor Babes University of Medicine and Pharmacy

   (1 articles) Ludwig Maximilians Universität München

   (1 articles) National Research Council Canada

3. People in the News

   (18 articles) Piotr Targowski

   (10 articles) Michalina Góra

   (8 articles) Adrian G. Podoleanu

   (6 articles) Gaël Latour

   (5 articles) Jean-Philippe Echard

   (5 articles) Haida Liang

   (4 articles) Balthazar Soulier

   (4 articles) Stéphane Vaiedelich

   (4 articles) Mady Elias

   (4 articles) Tomasz Bajraszewski

1. Two New Methods Lend Scientific Muscle To Detecting Art Forgeries

   Explore Article io9. We come from the future. (Feb 10 2010) Art

   If you're looking to sell some phony art, your time appears to be running out. Dartmouth researchers can spot art forgeries using neuroscience techniques, while Polish scientists use medical imaging technology to do likewise. The Dartmouth College team of James Hughes, Daniel Graham, and Daniel Rockmore took an established part of neuroscience - the notion of sparse coding - and applied it to the art world. Sparse coding technology imitates the human visual system by attempting to replicate the ways in which the brain takes complex images and breaks them down into simple patterns thanks to a series of filter ...
   

   Comment on Article Mentions:   Nicolaus Copernicus University   Piotr Targowski

2. Imaging method for eye disease used to eye art forgeries

   Explore Article PhysOrg.com (Feb 3 2010) Art

   Scientists in Poland are describing how a medical imaging technique has taken on a second life in revealing forgery of an artist's signature and changes in inscriptions on paintings that are hundreds of years old. A report on the technique, called optical coherence tomography (OCT), is in ACS' Accounts of Chemical Research. Piotr Targowski notes that easel paintings prepared according to traditional techniques consist of multiple layers. The artist, for instance, first applies a glue sizing over the canvas to ensure proper adhesion of later layers. Those layers may include an outline of the painting, the painting itself, layers of ...
   

   Comment on Article Mentions:   Nicolaus Copernicus University   Piotr Targowski

3. Structural Examination of Easel Paintings with Optical Coherence Tomography

   Explore Article ACS Publications Home Page (Dec 31 2009) Art

   Identification of the order, thickness, composition, and possibly the origin of the paint layers forming the structure of a painting, that is, its stratigraphy, is important in confirming its attribution and history as well as planning conservation treatments. The most common method of examination is analysis of a sample collected from the art object, both visually with a microscope and instrumentally through a variety of sophisticated, modern analytical tools. Because of its invasiveness, however, sampling is less than ideally compatible with conservation ethics; it is severely restricted with respect to the amount of material extirpated from the artwork. Sampling is ...
   

   Comment on Article Mentions:   Nicolaus Copernicus University   Piotr Targowski

4. Speckle noise reduction in optical coherence tomography of paint layers

   Explore Article opticsinfobase.org (Dec 21 2009) Art , NDE/NDT , Other Non-Medical

   We present and characterize a sequential angular compounding method for reducing speckle contrast in optical coherence tomography images of paint layers. The results are compared with postprocessing methods, and we show that the compounding technique can improve the speckle contrast ratio in B-scans by better than a factor of 2 in exchange for a negligible loss of resolution. As a result, image aesthetics are improved, thin layers become more distinct, and edge-detection algorithms work more efficiently. The effect of varying the angular scan size and number of averages is investigated, and it is found that a degree of statistical correlation ...
   

   Comment on Article Mentions:   Adrian G. Podoleanu   University of Kent

5. The Nature of the Extraordinary Finish of Stradivaris Instruments

   Explore Article www3.interscience.wiley.com (Dec 13 2009) Art

   The composition of Stradivari\9s varnish has raised numerous hypotheses and controversies for the past two centuries, although a clear understanding of the materials could not be reached. In their Communication (DOI: 10.1002/anie.200905131), J.-P. Echard et al. describe the chemical stratigraphy of the varnishes from five representative Stradivari instruments by using a wide array of analytical techniques. In particular, Stradivari used several red pigments, and may have sought a variety of tints to give his instruments their beautiful appearance.
   

   Comment on Article Mentions:   Jean-Philippe Echard   Stéphane Vaiedelich   Balthazar Soulier

6. Using Optical Coherence Tomography to Study Wood and Wood Finishes on an 18th century Italian violin

   Explore Article Optical Coherence Tomography News (Dec 13 2009) Art

   Feature Of The Week 12/13/09: When available, non-contact, non-destructive and in situ techniques are very much favoured to study the cultural heritage artefacts that are precious witnesses of the past, by limiting the number of micro-samples. Optical Coherence Tomography (OCT) is then especially at
   

   Comment on Article Mentions:   Pierre & Marie Curie University   Mady Elias   Gaël Latour

7. Structural and optical properties of wood and wood finishes studied using optical coherence tomography: application to an 18th century Italian violin

   Explore Article opticsinfobase.org (Nov 13 2009) Art , NDE/NDT

   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 μm) 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 ...
   

   Comment on Article Mentions:   Jean-Philippe Echard   Isabelle Emond   Mady Elias

8. Applicability of Optical Coherence Tomography at 1.55 μm to the Examination of Oil Paintings

   Explore Article SpringerLink Home (Aug 9 2009) Art

   With 47 samples of commercially available oil paints, the applicability of Optical coherence tomography to noninvasive tomography of paint layers was examined. Two different instruments, utilizing near-infrared light with central wavelength of 823nm and, for the first time, 1.55 μm, were used to obtain cross-sectional images. Example tomograms are given; a ray tracing correction of images is also discussed. The tests revealed that applicability of OCT is limited to certain pigments and the longer wavelength is better suited for this application.
   

   Comment on Article Mentions:   Nicolaus Copernicus University   Anna Szkulmowska   David Stifter

9. Varnish Thickness Determination by Spectral Optical Coherence Tomography

   Explore Article SpringerLink Home (Aug 9 2009) Art

   The applicability of spectral optical coherence tomography (SOCT) for noninvasive and noncontact assessment of varnish layer thickness and structure on easel paintings is discussed. The SOCT tomograms of such objects are presented. Content Type Book ChapterDOI 10.1007/978-3-540-72130-7_58Authors I. Gorczynska, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyM. Wojtkowski, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyM. Szkulmowski, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyT. Bajraszewski, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyB. Rouba, Opificio ...
   

   Comment on Article Mentions:   Maciej Wojtkowski   Nicolaus Copernicus University   Andrzej A. Kowalczyk

10. Spectral Domain Optical Coherence Tomography as the Profilometric Tool for Examination of the Environmental Influence on Paintings on Canvas

    Explore Article SpringerLink Home (Aug 9 2009) Art

    The changes of surface profile of oil paintings on canvas caused by rapid humidity are examined by spectral OCT. The speed, resolution, and long-time stability of SOCT make this technique appropriate for quantitative determination of surface profile changes.
    

    Comment on Article Mentions:   Nicolaus Copernicus University   Tomasz Bajraszewski   Iwona Gorczyńska

11. Marginal adaptation of ceramic veneers investigated with en face optical coherence tomography

    Explore Article SPIE Digital Library (Jul 13 2009) Art , Other Non-Medical

    The aim of this study was to analyze the quality of marginal adaptation and gap width of Empress veneers using en-face optical coherence tomography. The results prove the necessity of investigating the marginal adaptation after each veneer bonding process
    

    Comment on Article Mentions:   Adrian G. Podoleanu   Adrian Bradu   Cosmin Sinescu

12. Laser induced breakdown spectroscopy (LIBS) applied to stratigrafic elemental analysis and optical coherence tomography (OCT) to damage determination of cultural heritage Brazilian coins

    Explore Article SPIE Digital Library (Jul 10 2009) Art , Other Non-Medical

    This work presents a compositional characterization of 1939's Thousand "Réis" and 1945's One "Cruzeiro" Brazilian coins, forged on aluminum bronze alloy. The coins were irradiated by a Q-switched Nd:YAG laser with 4 ns pulse width and energy of 25mJ emitting at 1064nm reaching 3.1010Wcm-2 (assured condition for stoichiometric ablation), forming a plasma in a small fraction of the coin. Plasma emission was collected by an optical fiber system connected to an Echelle spectrometer. The capability of LIBS to remove small fraction of material was exploited and the coins were analyzed ablating layer by layer from patina to the bulk. The ...
    

    Comment on Article

13. Absolute LIBS stratigraphy with optical coherence tomography

    Explore Article SPIE Digital Library (Jul 10 2009) Art

    In this contribution preliminary studies on the application of Optical Coherence Tomography (OCT) to absolute depth calibration of Laser Induced Breakdown Spectroscopy (LIBS) data in application to revealing stratigraphy of easel paintings are presented. The procedure of in-situ monitoring of LIBS by means of OCT is described. Numerical method developed for precise extraction of the depth of the LIBS ablation crater is explained. Results obtained with model paintings are discussed.
    

    Comment on Article Mentions:   Nicolaus Copernicus University   Piotr Targowski

14. Application of graphically oriented programming to imaging of structure deterioration of historic glass by optical coherence tomography

    Explore Article SPIE Digital Library (Jul 10 2009) Art , Other Non-Medical

    Optical Coherence Tomography (OCT) is an interferometric method utilising light of low temporal coherence for noninvasive structural imaging of objects weakly absorbing and scattering light. In this contribution, using various examples of images of objects made of glass affected by the atmospheric corrosion and/or by crizzling, we demonstrate a software developed in our laboratory specifically for 3D OCT imaging of samples with a fine structure. For this task we employed the OpenGL platform (Open Graphics Library), an Application Programming Interface (API) for writing applications dedicated to interactive 3D computer graphics. In our application we have utilized texture rendering with a ...
    

    Comment on Article Mentions:   Nicolaus Copernicus University   Piotr Targowski

15. Study of varnish layers with optical coherence tomography in both visible and infrared domains

    Explore Article SPIE Digital Library (Jul 7 2009) Art

    Optical Coherence Tomography (OCT) is an attractive technique to study works of art because it allows non-destructive and contactless analysis. In the case of musical instruments, the study of wood finishes could give interesting information as the thicknesses of the layers, the number of layers and the presence of fillers. A time-domain full-field OCT, achieving high resolution, is used in both visible and near infrared ranges to characterize semi-transparent layers containing scattering particles as charged varnish layers. We present OCT measurements on wood varnished with different coatings. We show that the detection of pigment particles is dependent of the spectral ...
    

    Comment on Article Mentions:   Gaël Latour   Pierre & Marie Curie University   Jean-Philippe Echard

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