1. Articles mentioning both Gwangju Institute of Science and Technology and Jun Geun Shin

    1-17 of 17
    1. Buffered polarization diverse detection for single-camera polarization-sensitive optical coherence tomography

      Buffered polarization diverse detection for single-camera polarization-sensitive optical coherence tomography
      Herein we propose a method to mitigate a position mismatch problem for a spectral-domain polarization-sensitive optical coherence tomography (SD-PS-OCT) system that uses a single line-scan detection scheme. A single detector-based PS-OCT detects two orthogonal polarization components as two adjacent A-scan signals in turns. Thus, two adjacent A-scan signals are not scattered at a fixed point in time (position mismatch problem), resulting in uncorrelated signals between them. To achieve sequential detection ...
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    2. Quantitative discrimination of pearls using polarization-sensitive optical coherence tomography

      Quantitative discrimination of pearls using polarization-sensitive optical coherence tomography
      We propose a robust method that can quantitatively discriminate genuine pearls from imitation ones by introducing the concept of entropy in the polarization-sensitive optical coherence tomography (PS-OCT). Qualitatively, by examining the birefringence properties of the nacre region of pearls with PS-OCT, the genuine pearls can be easily discriminated. To quantify the amount of birefringence formation, however, the concept of phase retardation entropy is introduced, which is expected to have a ...
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    3. In vivo three-dimensional imaging of human corneal nerves using Fourier-domain optical coherence tomography

      In vivo three-dimensional imaging of human corneal nerves using Fourier-domain optical coherence tomography
      We have employed Fourier-domain optical coherence tomography (FD-OCT) to achieve corneal nerve imaging, which could be useful in surgical planning and refractive surgery. Because the three-dimensional (3-D) images of the corneal nerves were acquiredin vivo, unintentional movement of the subject during the measurement led to imaging artifacts. These artifacts were compensated for with a series of signal processing techniques, namely realigning A-scan images to flatten the boundary and cross-correlating adjacent ...
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    4. Examination of Gland Dropout Detected on Infrared Meibography by Using Optical Coherence Tomography Meibography

      Examination of Gland Dropout Detected on Infrared Meibography by Using Optical Coherence Tomography Meibography
      Purpose To elucidate the anatomic details of gland dropout detected on two-dimensional infrared (IR) meibography in cases of dry eye associated with meibomian gland dysfunction (MGD) by using three-dimensional optical coherence tomography (OCT) meibography. Methods In this cross-sectional, observational case series, we enrolled gland dropout detected on IR meibography; the condition was then examined using a real-time swept-source OCT system. Accordingly, a series of 500 raster B-scan OCT images, with ...
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    5. An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography

      An All-Fiber-Optic Combined System of Noncontact Photoacoustic Tomography and Optical Coherence Tomography
      We propose an all-fiber-based dual-modal imaging system that combines noncontact photoacoustic tomography (PAT) and optical coherence tomography (OCT). The PAT remotely measures photoacoustic (PA) signals with a 1550-nm laser on the surface of a sample by utilizing a fiber interferometer as an ultrasound detector. The fiber-based OCT, employing a swept-source laser centered at 1310 nm, shares the sample arm of the PAT system. The fiber-optic probe for the combined system ...
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    6. All optical fiber combined-imaging system of photoacoustic and optical coherence tomography

      All optical fiber combined-imaging system of photoacoustic and optical coherence tomography
      We present an all optical fiber combined-imaging system that integrates non-contact photoacoustic tomography (NPAT) and optical coherence tomography (OCT) to simultaneously provide PA and OCT images. The fiber-based PAT system utilizing a Mach-Zehnder interferometer with a fiber laser of 1550 nm measures the photoacoustic signal at the sample surface. For the generation of a PA signal, a pulse train from a bulk type Nd:YAG laser illuminates the sample via ...
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    7. Full-range spectral domain optical coherence tomography using fiber-based sample scanner as self-phase shifter

      Full-range spectral domain optical coherence tomography using fiber-based sample scanner as self-phase shifter
      We propose full-range spectral domain optical coherence tomography equipped with a fiber-based sample scanner, which is used for sample scanning and phase shifting for full-range image at the same time. For a fiber-based sample scanner, since the fiber tip oscillates as a free standing cantilever in general, unintentional phase shift occurs inevitably. The unintentional phase shift was used for eliminating the bothersome complex conjugate ghost image of OCT. In addition ...
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    8. Feature Of The Week 7/17/11: GIST Researchers Explore Full-Field OCT For Inspection of Chemical Mechanical Polishing Of Silicon Wafers and Semiconductors

      Feature Of The Week 7/17/11: GIST Researchers Explore Full-Field OCT For Inspection of Chemical Mechanical Polishing Of Silicon Wafers and Semiconductors
      ...lishing of silicon wafers.For more information see recent Article. Courtesy Woo June Choi.   Researchers at Gwangju Institute of Science and Technology in Korea continue to explore a wide variety technologies and appli...
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    9. Characterization of wet pad surface in chemical mechanical polishing (CMP) process with full-field optical coherence tomography (FF-OCT)

      Characterization of wet pad surface in chemical mechanical polishing (CMP) process with full-field optical coherence tomography (FF-OCT)
      ...40.5450) Optics at surfaces : Polishing ToC Category: Category Pending Citation Woo June Choi, Sung Pyo Jung, Jun Geun Shin, Danning Yang, and Byeong Ha Lee, "Characterization of wet pad surface in chemical mechanical po...
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    10. 1-17 of 17
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  2. Organizations in the News

    1. (4 articles) University of Tsukuba
    2. (1 articles) Institute of Applied Physics
    3. (1 articles) Pusan National University
    4. (1 articles) University of British Columbia
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  3. People in the News

    1. (16 articles) Byeong Ha Lee
    2. (7 articles) Tae Joong Eom
    3. (4 articles) Jae Hwi Lee
    4. (4 articles) Yoshiaki Yasuno
    5. (4 articles) Eun Jung Min
    6. (2 articles) Myeong Jin Ju
    7. (2 articles) Hae Yeon Kim
    8. (2 articles) Yuri Kim
    9. (2 articles) Jonghyun Eom
    10. (2 articles) Woo June Choi
    11. (1 articles) Sang Jin Lee
    12. (1 articles) Myung Yung Jeong