1. Articles from Simon Tuohy

    1-3 of 3
    1. Method for depth resolved wavefront sensing, depth resolved wavefront sensors and method and apparatus for optical imaging

      Method for depth resolved wavefront sensing, depth resolved wavefront sensors and method and apparatus for optical imaging

      Methods and devices are disclosed for acquiring depth resolved aberration information using principles of low coherence interferometry and perform coherence gated wavefront sensing (CG-WFS). The wavefront aberrations is collected using spectral domain low coherence interferometry (SD-LCI) or time domain low coherence interferometry (TD-LCI) principles. When using SD-LCI, chromatic aberrations can also be evaluated. Methods and devices are disclosed in using a wavefront corrector to compensate for the aberration information provided by CG-WFS, in a combined imaging system, that can use one or more channels from the class of (i) optical coherence tomography (OCT), (ii) scanning laser ophthalmoscopy, (iii) microscopy, such ...

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    2. Depth-resolved wavefront aberrations using a coherence-gated Shack-Hartmann wavefront sensor

      Depth-resolved wavefront aberrations using a coherence-gated Shack-Hartmann wavefront sensor
      In the present paper we investigate the possibility of narrowing the depth range of a physical Shack – Hartmann (SH) wavefront sensor (WFS) by using coherence gating. For the coherence gating, two low coherence interferometry (LCI) methods are evaluated and proof of principle configurations demonstrated: (i) a time domain LCI method based on phase shifting interferometry and (ii) a spectral domain LCI method, based on tuning a narrow band optical source. The two configurations are used to demonstrate each, the possibility of constructing a coherence gated (CG) SH/WFS. It is shown that these configurations produce spot patterns similar to those ...
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    3. Adaptive optics loop for en-face optical coherence tomography and laser scanning confocal microscopy

      The capabilities of a novel deformable mirror and wave-front sensor combination to correct aberrations in microscopy are analyzed. The deformable mirror, (Mirao52-D, Imagine Eyes) is incorporated with a Shack-Hartmann sensor (HASO, Imagine Optic) within a complex imaging system able to produce simultaneous en-face Optical Coherence Tomography and Laser Scanning Confocal Microscopy images as well as B-scan OCT images. A large angle imaging along one of the scanning directions is demonstrated using the AO loop to correct for the interface optics aberration. The image is split into three panels, and each panel is imaged using its own set of corrections. The ...

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    1-3 of 3
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  2. Topics in the News

    1. (5 articles) National Institutes of Health
    2. (3 articles) University of Kent
    3. (3 articles) Adrian G. Podoleanu
    4. (1 articles) Adrian Bradu
    5. (1 articles) Fabrice Harms
    6. (1 articles) Imagine Eyes
    7. (1 articles) University of Houston
    8. (1 articles) University of Minnesota
    9. (1 articles) Indiana University
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    11. (1 articles) Massachusetts Institute of Technology
    12. (1 articles) James G. Fujimoto
    13. (1 articles) Taner Akkin
    14. (1 articles) Donald T. Miller
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