1. Articles from k. s. lee

    1-5 of 5
    1. Phase-resolved Doppler imaging with dual-detection full-range frequency domain optical coherence tomography

      Phase-resolved Doppler imaging with dual-detection full-range frequency domain optical coherence tomography

      We have reported a technique of full-range imaging so-called a Dual-Detection Frequency Domain Optical Coherence Tomography (DD-FD-OCT), in which two spectra, representing real and imaginary components of a complex spectral interference, are simultaneously acquired by two detection channels. In this paper, we will discuss in detail a mirror rejection performance of DD-FD-OCT. Furthermore, we present an implementation of DD-FD-OCT for phase-resolved Doppler imaging. The DD-FD-OCT signal is achieved without manipulation of the phase relation between consecutive axial lines and hence its phase information is almost identical to that acquired by the conventional FD-OCT. As a result, the full-range DD-FD-OCT is ...

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    2. Full-range spectral domain Doppler optical coherence tomography

      Full-range spectral domain Doppler optical coherence tomography
      Spectral domain optical coherence tomography (SD-OCT) systems achieve higher sensitivities compared to time domain OCT systems. However, one of the main challenges in SD-OCT is the obscuring object structure called "ghost image" or "mirror image" that arises from the Fourier transform of a real function. We have designed and developed a phaseshifting- based full-range SD-OCT system that we refer to as the dual detection full range SD-OCT. The proposed technique simultaneously obtains the quadrature components of a complex spectral interference. Therefore, the technique enables full range imaging without any loss of speed and is intrinsically less sensitive to movements of ...
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    3. Sub-cellular resolution imaging with Gabor domain optical coherence microscopy

      Sub-cellular resolution imaging with Gabor domain optical coherence microscopy
      Optical Coherence Microscopy (OCM) utilizes a high NA microscope objective in the sample arm to achieve an axially and laterally high resolution OCT image. An increase in NA, however, leads to a dramatically decreased depth of focus (DOF), and hence shortens the imaging depth range so that high lateral resolution is maintained only within a small depth region around the focal plane. One solution to increase the depth of imaging while keeping a high lateral resolution is dynamic-focusing. Utilizing the voltage controlled refocus capability of a liquid lens, we have recently presented a solution for invariant high resolution imaging using ...
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    4. Gabor domain optical coherence microscopy

      Gabor domain optical coherence microscopy
      Optical Coherence Microscopy (OCM) utilizes a higher NA microscope objective in the sample arm of a low coherence interferometer than in Optical Coherence Tomography (OCT) to achieve axially and laterally high-resolution optical tomographic images. An increase in NA, however, leads to a dramatically decreased depth of focus (DOF), and hence shortens the imaging depth range so that high lateral resolution is maintained only within a small depth region around the focal plane. One solution to increase the depth of imaging while keeping a high lateral resolution is dynamic-focusing. Utilizing the voltage controlled refocus capability of a liquid lens, we have ...
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    1-5 of 5
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  2. Topics in the News

    1. (5 articles) Jannick P. Rolland
    2. (5 articles) Kye-Sung Lee
    3. (4 articles) University of Central Florida
    4. (4 articles) University of Rochester
    5. (4 articles) Panomsak Meemon
    6. (3 articles) Supraja Murali
    7. (2 articles) Kevin P. Thompson
    8. (2 articles) Optical Research Associates
    9. (2 articles) Columbia University
    10. (2 articles) Christine P. Hendon
    11. (2 articles) Canon Medical Systems
    12. (1 articles) University of Houston
    13. (1 articles) Kyoto University Graduate School of Medicine
    14. (1 articles) Dmitry A. Terpelov
    15. (1 articles) David D. Sampson
    16. (1 articles) Eric A. Swanson
    17. (1 articles) Akitaka Tsujikawa
    18. (1 articles) Kirill V. Larin
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