1. Jian Ren

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    1. Mentioned In 10 Articles

    2. Demonstration of Triband Multi-Focal Imaging with Optical Coherence Tomography

      Demonstration of Triband Multi-Focal Imaging with Optical Coherence Tomography
      We demonstrate an extended depth of focus optical coherence tomography (OCT) system based on the use of chromatic aberration to create displaced focal planes in the sample. The system uses a wavelength-swept source tuning over three spectral bands and three separate interferometers, each of which interfaces to a single illumination/collection fiber. The resulting three imaged volumes are merged in post-processing to generate an image with a larger depth of ...
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    3. Radiometric model for coaxial single- and multimode optical emission from double-clad fiber

      Radiometric model for coaxial single- and multimode optical emission from double-clad fiber
      Double-clad fibers (DCFs) are versatile waveguides supporting a single-mode core surrounded by a multimode inner cladding. DCFs are increasingly used for multimodal biomedical applications, such as imaging or therapy, for which the core is typically used for coherent illumination and the inner cladding, to support a concurrent modality. Proper optimization is, however, critical to ensure high optical performance and requires accurate modeling of coaxial single- and multimode output beams. In ...
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    4. Imaging of the Rotator Cuff With Optical Coherence Tomography

      Imaging of the Rotator Cuff With Optical Coherence Tomography
      This study evaluated the utility of optical coherence tomography (OCT) in imaging porcine and human rotator cuff (RTC) tissue, analyzed its effectiveness in identifying clinical pathology, and correlated these findings with histologic examination. Twelve human cadaveric and 6 porcine shoulders were evaluated. Six-millimeterwide bone sections were harvested from the proximal humerus of each specimen, with each containing the entire enthesis of the respective RTC tendon, as well as 2 cm ...
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    5. Image reconstruction by position and motion tracking

      Image reconstruction by position and motion tracking
      A system, method, and apparatus provide the ability to reconstruct an image from an object. A hand-held image acquisition device is configured to acquire local image information from a physical object. A tracking system obtains displacement information for the hand-held acquisition device while the device is acquiring the local image information. An image reconstruction system computes the inverse of the displacement information and combines the inverse with the local image ...
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    6. Feature Of The Week 5/1/11: Caltech Researchers Develop an OCT Needle Probe for Investigating Open Angle Glaucoma

      Feature Of The Week 5/1/11: Caltech Researchers Develop an OCT Needle Probe for Investigating Open Angle Glaucoma
      ...ries that would benefit a lot from high-fidelity OCT images.For more information see recent Article. Courtesy Jian Ren from the California Institute of Technology.   Feature Of The Week 5/1/11: One major cause of Open ...
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  2. About Jian Ren

    Jian Ren

    Jian Ren is working toward the Ph.D. degree at the Department of Electrical Engineering, California Institute of Technology, Pasadena. His current research focuses are optical coherence tomography (OCT) based endoscopes and wavefront sensing with biomedical applications.