1. Articles from charles p. lin

    1-3 of 3
    1. Ultrahigh resolution spectral-domain optical coherence tomography using the 1000-1600 nm spectral band

      Ultrahigh resolution spectral-domain optical coherence tomography using the 1000-1600 nm spectral band

      Ultrahigh resolution optical coherence tomography (UHR-OCT) can image microscopic features that are not visible with the standard OCT resolution of 5-15 µm. In previous studies, high-speed UHR-OCT has been accomplished within the visible (VIS) and near-infrared (NIR-I) spectral ranges, specifically within 550-950 nm. Here, we present a spectral domain UHR-OCT system operating in a short-wavelength infrared (SWIR) range from 1000 to 1600 nm using a supercontinuum light source and an InGaAs-based spectrometer. We obtained an axial resolution of 2.6 µm in air, the highest ever recorded in the SWIR window to our knowledge, with deeper penetration into tissues than ...

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    2. Method and apparatus for performing optical measurements

      Method and apparatus for performing optical measurements
      A method and apparatus for performing various optical measurements is provided utilizing an optical coherence domain refrectometer (OCDR). A short coherence optical radiation source applies optical radiation through like optical paths to a sample and an optical reflector. The optical reflector is movable in accordance with a predetermined velocity profile to permit interferometric scanning of the sample, the resulting output having a Doppler shift frequency modulation. This output may be demodulated and detected to obtain desired measurements and other information. Additional information may be obtained by applying radiation from two or more sources at different wavelengths to the sample and ...
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    3. Method and apparatus for optical imaging with means for controlling the longitudinal range of the sample

      Method and apparatus for optical imaging with means for controlling the longitudinal range of the sample
      A method and apparatus for performing optical imaging on a sample wherein longitudinal scanning or positioning in the sample is provided by either varying relative optical path lengths for an optical path leading to the sample and to a reference reflector, or by varying an optical characteristic of the output from an optical source applied to the apparatus. Transverse scanning in one or two dimensions is provided on the sample by providing controlled relative movement between the sample and a probe module in such direction and/or by steering optical radiation in the probe module to a selected transverse position ...
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    1-3 of 3
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  2. Topics in the News

    1. (3 articles) Massachusetts Institute of Technology
    2. (2 articles) Center for Ophthalmic Optics and Lasers
    3. (2 articles) Boston University
    4. (2 articles) Massachusetts General Hospital
    5. (1 articles) Tsinghua University
    6. (1 articles) Harvard University
    7. (1 articles) Massachusetts General Hospital
    8. (1 articles) Harvard University
    9. (1 articles) University of Maryland
    10. (1 articles) The Chinese University of Hong Kong
    11. (1 articles) Cleveland Clinic
    12. (1 articles) Duke University
    13. (1 articles) University of Queensland
    14. (1 articles) Massachusetts Institute of Technology
    15. (1 articles) FDA
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