1. Articles from gaël latour

    1-6 of 6
    1. Micro-spectrometry in the visible range with full-field optical coherence tomography for single absorbing layers

      Micro-spectrometry in the visible range with full-field optical coherence tomography for single absorbing layers
      A time-domain full-field OCT adapted to the visible range and with an original configuration using an interferometric objective, that minimizes mechanical vibrations and some settings and that performs imaging without moving the sample, is presented. This setup achieves micrometer scale imaging, 1.5 μm in the axial direction and 1.2 μm in the lateral one. The principle of micro-spectrometry from OCT data by Fourier transform is described and the influence of some key data processing parameters is simulated and discussed. The experimental spectra reconstruction from tomographic data is validated by comparison with transmittance spectra. Imaging and spectra of dyes ...
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    2. Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography

      Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography
      Micrometer scale resolution full-field optical coherence tomography (FF-OCT) is developed for imaging human graft corneas. Three-dimensional (3-D) images with ultrahigh resolution (respectively, 1 and 1.5 µm in the axial and transverse directions), comparable to traditional histological sections, are obtained allowing the visualization of the cells and the precise structure of the different layers that compose the tissue. The sensitivity of our device enables imaging the entire thickness of the cornea, even in edematous corneas more than 800 µm thick. Furthermore, we provide tomographic 3-D images of laser incisions inside the tissue at various depths without slicing the studied corneas ...
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    3. 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
      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 ...
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    4. Study of varnish layers with optical coherence tomography in both visible and infrared domains

      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 ...
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    5. Optical coherence tomography: non-destructive imaging and spectral information of pigments

      Gael Latour, Julien Moreau, Mady Elias et al. Optical Coherence Tomography (OCT) is a non-invasive and non-destructive technique which is very interesting for the study of works of art. Based on a Michelson interferometer, our device has been adapted for the recording of information in the visible range. This system allows three-dimensional ima ... [Proc. SPIE Int. Soc. Opt. Eng. 6618, 661806 (2007)] published Mon Jul 16, 2007.
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    1-6 of 6
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  2. Topics in the News

    1. (5 articles) Université Pierre et Marie Curie
    2. (2 articles) Institut d'Optique
    3. (1 articles) OCT4ART
    4. (1 articles) National Institutes of Health
    5. (1 articles) University of Tübingen
    6. (1 articles) Stanford University
    7. (1 articles) Johns Hopkins University
    8. (1 articles) University of Rochester
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    Structural and optical properties of wood and wood finishes studied using optical coherence tomography: application to an 18th century Italian violin Imaging and spectral information with time-domain OCT: Application to works of art Human graft cornea and laser incisions imaging with micrometer scale resolution full-field optical coherence tomography Micro-spectrometry in the visible range with full-field optical coherence tomography for single absorbing layers Optical coherence tomography findings in patients with transfusion-dependent β-thalassemia Higher-order regression three-dimensional motion-compensation method for real-time optical coherence tomography volumetric imaging of the cornea Optical coherence tomography image based eye disease detection using deep convolutional neural network Optical Coherence Tomography Biomarkers in Predicting Treatment Outcomes of Diabetic Macular Edema After Dexamethasone Implants Macular and Optic Disc Parameters in Children with Amblyopic and Nonamblyopic Eyes under Optical Coherence Tomography Fundus Images Optical coherence tomography assessment of the enamel surface after debonding the ceramic brackets using three different techniques Optical Engineering Opening at Aeon Imaging PhD Position for Uncertainty-aware AI-based Predictive Model for Treatment Decision Making at University of Amserdam