1. Articles from J. M. O. Daniel

    1-4 of 4
    1. High resolution Fourier domain Optical Coherence Tomography at 2 microns for painted objects

      High resolution Fourier domain Optical Coherence Tomography at 2 microns for painted objects

      Optical Coherence Tomography has been successfully applied to the non-invasive imaging of subsurface microstructure of a variety of materials from biological tissues to painted objects of art. One of the limitations of the technique is the low depth of penetration due to the strong scattering and absorption in the material. Previous studies found that for paint materials, the optimum window for large depth of penetration is around 2.2 microns. This is also true for many other materials with low water content. We have previously demonstrated OCT systems in this wavelength regime for imaging with improved depth of penetration. In ...

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    2. High resolution Fourier domain optical coherence tomography in the 2 um wavelength range using a broadband supercontinuum source

      High resolution Fourier domain optical coherence tomography in the 2 um wavelength range using a broadband supercontinuum source

      A 220 nm bandwidth supercontinuum source in the two-micron wavelength range has been developed for use in a Fourier domain optical coherence tomography (FDOCT) system. This long wavelength source serves to enhance probing depth in highly scattering material with low water content. We present results confirming improved penetration depth in high opacity paint samples while achieving the high axial resolution needed to resolve individual paint layers. This is the first FDOCT developed in the 2 μm wavelength regime that allows fast, efficient capturing of 3D image cubes at a high axial resolution of 13 μm in air (or 9 μm ...

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    3. Optical coherence tomography in the 2um wavelength regime for paint and other high opacity materials

      Optical coherence tomography in the 2um wavelength regime for paint and other high opacity materials

      An optical coherence tomography system using a compact fiber source emitting amplified spontaneous emission at central wavelength of 1960 nm with bandwidth of 40 nm is developed to enhance the probing depth in a highly scattering material with low water content. Examples of application to paint are used to demonstrate significantly improved penetration depth in high opacity materials in the 2-μm wavelength regime.

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    4. Long wavelength optical coherence tomography for imaging of painted objects

      Long wavelength optical coherence tomography for imaging of painted objects

      Optical Coherence Tomography has been successfully applied to the imaging of painted objects in recent years. However, a significant limitation is the low penetration depth of OCT in paint because of the high opacity of paint due to either scattering or absorption. It has been shown that the optimum spectral window for OCT imaging of paint layers is around 2.2μm in wavelength. In this paper, we demonstrate a 1950nm OCT for imaging painted objects using a superfluorescent fiber source at low power.

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    1-4 of 4
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  2. Topics in the News

    1. (4 articles) University of Southampton
    2. (3 articles) Nottingham Trent University
    3. (3 articles) Haida Liang
    4. (1 articles) University of Kent
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    Long wavelength optical coherence tomography for imaging of painted objects Optical coherence tomography in the 2um wavelength regime for paint and other high opacity materials High resolution Fourier domain optical coherence tomography in the 2 um wavelength range using a broadband supercontinuum source High resolution Fourier domain Optical Coherence Tomography at 2 microns for painted objects Non-local Weighted Sparse Representation for OCT Reconstruction Multimodality Imaging to Detect Vulnerable Plaque in Coronary Arteries and Its Clinical Application (Book Chapter) Characterization of Soft Contact Lens Edge Fitting during Daily Wear Using Ultrahigh-Resolution Optical Coherence Tomography Optical coherence tomography angiography in glaucoma care Optical Coherence Tomography for Brain Imaging (Book Chapter) High Resolution Wide Field-of-View Optical Coherence Tomography For 3D Imaging (Thesis) The CLASS Surgical Site Characteristics in a Clinical Grading Scale and Anterior Segment Optical Coherence Tomography: A One-Year Follow-Up Photothermal optical coherence tomography of indocyanine green in ex vivo eyes