1. Articles from Brynmor J. Davis

    1-6 of 6
    1. Spectral near-field optical tomography

      Spectral near-field optical tomography
      A method and computer program product for imaging an object are disclosed. The object is illuminated with an electromagnetic wave, characterized by a spectrum of illuminating wavevectors. Electromagnetic waves scattered by the object are detected, and are characterized by a spectrum of detected wavevectors. An aperture equal to or smaller than an instantaneous characterizing wavelength of the illuminating electromagnetic wave is disposed between the source and the detector. At least one of the illuminating and detected wavevectors is varied in magnitude to provide information regarding a scattering characteristic of the object. By applying a forward model of the aperture to ...
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    2. Robust determination of the anisotropic polarizability of nanoparticles using coherent confocal microscopy

      Robust determination of the anisotropic polarizability of nanoparticles using coherent confocal microscopy
      A coherent confocal microscope for fully characterizing the elastic scattering properties of a nanoparticle as a function of wavelength. Using a high numerical aperture lens, two-dimensional scanning and a simple vector beam shaper, the rank-2 polarizability tensor is estimated from a single confocal image. A computationally efficient data processing method is described and numerical simulations show that this algorithm is robust to noise and uncertainty in the focal plane position. The measurement of the polarizability removes the need for a priori assumptions regarding the nanoparticle shape.
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    3. Interferometric Synthetic Aperture Microscopy: Microscopic Laser Radar

      Interferometric Synthetic Aperture Microscopy: Microscopic Laser Radar
      Combining optical coherence tomography instrumentation and the principles of synthetic aperture radar, researchers have developed a new method for reconstructing 3-D optical images—even in regions that are out of focus in the raw data. Doctors may soon be able to use this approach as a noninvasive diagnostic tool in clinical settings. Microscopic 3-D optical imaging provides guidance to tomorrow’s doctors during surgical interventions. In many clinical scenarios, doctors require high-resolution visualization of tissues and their underlying cellular structures. Perhaps the most common example is for the identification, diagnosis and treatment of cancer. In such cases, clinicians typically take ...
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    4. Partially coherent illumination for inverse scattering full-field interferometric synthetic aperture microscopy

      Methods and apparatus for three-dimensional imaging of a sample. A source is provided of a beam of light characterized by partial spatial coherence. The beam is focused onto a sample and scattered light from the sample is superposed with a reference beam derived from the source onto a focal plane detector array to provide an interference signal. A forward scattering model is derived relating measurement data to structure of an object to allow solutions of an inverse scattering problem, based upon the interference signal so that a three-dimensional structure of the same may be inferred. The partial spatial coherence of ...
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    5. Partially coherent illumination in full-field interferometric synthetic aperture microscopy

      A model is developed for optical coherence tomography and interferometric synthetic aperture microscopy (ISAM) systems employing full-field frequency-scanned illumination with partial spatial coherence. This model is used to derive efficient ISAM inverse scattering algorithms that give ... [J. Opt. Soc. Am. A 26, 376-386 (2009)]
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    6. Interferometric synthetic aperture microscopy: tissue structure inferred by computed imaging techniques

      Interferometric synthetic aperture microscopy: tissue structure inferred by computed imaging techniques
      Daniel L. Marks, Tyler S. Ralston, Brynmor J. Davis et al. Interferometric Synthetic Aperture Microscopy (ISAM) is an optical microscopy computed-imaging technique for measuring the optical properties of three-dimensional structures and biological tissues. In this work, the principle of ISAM is reviewed, and its application to imaging tissue properties in v ... [Proc. SPIE Int. Soc. Opt. Eng. 6864, 686407 (2008)] published Fri Feb 15, 2008.
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    1-6 of 6
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  2. Topics in the News

    1. (6 articles) University of Illinois at Urbana-Champaign
    2. (6 articles) P. Scott Carney
    3. (4 articles) Stephen A. Boppart
    4. (3 articles) Daniel L. Marks
    5. (2 articles) Tyler S. Ralston
    6. (1 articles) Steven G. Adie
    7. (1 articles) University of Southern California
    8. (1 articles) UC Irvine
    9. (1 articles) Qifa Zhou
    10. (1 articles) K. Kirk Shung
    11. (1 articles) Heidelberg Engineering
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