1. Changho Chong

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    1. Mentioned In 25 Articles

    2. Optical coherence tomography with a fizeau-type interferometer

      Optical coherence tomography with a fizeau-type interferometer
      An OCT system includes a light source configured to generate an optical beam, a Fizeau-type interferometer configured to receive the optical beam and produce an interference pattern, a detector configured to receive the interference pattern and produce an image signal, and a processing circuit including a processor and a memory, the memory being structured to store instructions that are executable by the processor to cause the processor to receive the ...
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    3. Dual wavelength resampling system and method

      Dual wavelength resampling system and method
      An optical coherence tomography (OCT) system combining multiple wavelengths is generally described. In an example, the OCT system includes multiple wavelength swept light sources. The system further includes an interferometer into which light from the light sources is directed and a detector configured to produce an imaging sample signal based on light received from the interferometer. The system also includes a splitter configured to split light from at least one ...
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    4. Optical coherence tomography system and method with multiple apertures

      Optical coherence tomography system and method with multiple apertures
      An optical coherence tomography (OCT) system using partial mirrors is generally described. In an example, the OCT system includes a swept light source. The system further includes an interferometer into which light from the light source is directed and a detector configured to produce an imaging sample signal based on light received from the interferometer. The system also includes a partial mirror disposed over an aperture, wherein the partial mirror ...
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    5. Optical coherence tomography system with multiple sample paths

      Optical coherence tomography system with multiple sample paths
      Improved optical coherence tomography (OCT) imaging systems are generally described. In an example, an OCT imaging system includes a tunable laser source, an interferometer, a splitter, and a detector. The tunable laser source is configured to provide a wavelength-scanned beam. The interferometer is configured to split the wavelength-scanned beam into a reference beam and an object beam. The splitter is configured to split the object beam into a first path ...
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    6. Biometry measurements using a new large-coherence–length swept-source optical coherence tomographer

      Biometry measurements using a new large-coherence–length swept-source optical coherence tomographer
      Purpose To evaluate the repeatability and reproducibility of the measurements obtained with the Argos, a new biometer with swept-source optical coherence tomography (SS-OCT), and to compare them with the results obtained with the IOLMaster 500 (partial-coherence interferometry [PCI]) and the Lenstar LS 900 (optical low-coherence reflectometry [OLCR]) biometers. Setting Private practice, Lynwood, California, USA. Design Prospective observational study. Methods All measurements were performed with the SS-OCT tomographer, the PCI biometer ...
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    7. Santec receives FDA Approval for ARGOS, Advanced Optical Biometer to measure eye parameters of patients before cataract surgery.

      Comment "Argos demo http://youtu.be/LkYcPjdaIeo" - Movu
      Santec receives FDA Approval for ARGOS, Advanced Optical Biometer to measure eye parameters of patients before cataract surgery.
      ...s, and differentiates itself from Santec established business providing OEM components to system integrators. Changho Chong PhD, who leads the MOVU team based in Santa Clara CA, commented “The FDA approval to marke...
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    8. Optical Coherence Tomography System With Multiple Sample Paths

      Optical Coherence Tomography System With Multiple Sample Paths
      Improved optical coherence tomography (OCT) imaging systems are generally described. In an example, an OCT imaging system includes a tunable laser source, an interferometer, a splitter, and a detector. The tunable laser source is configured to provide a wavelength-scanned beam. The interferometer is configured to split the wavelength-scanned beam into a reference beam and an object beam. The splitter is configured to split the object beam into a first path ...
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    9. Optical coherence tomography system and optical coherence tomography method

      Optical coherence tomography system and optical coherence tomography method
      A tunable light source 10 for varying emission wavelength periodically and an optical interferometer are used. A reflector is disposed at a measurement position, a light interference signal is A/D converted at a regular time interval, and data numbers at timing giving peak and bottom are calculated according to a least-squares method. Based on this, an approximate equation is calculated according to polynomial approximation and a sequence including the ...
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    10. Feature Of The Week 5/23/10: 140 kHz Optical Coherence Tomography by 2 Degree Of Freedom MEMS Scanner Based Swept Source

      Feature Of The Week 5/23/10: 140 kHz Optical Coherence Tomography by 2 Degree Of Freedom MEMS Scanner Based Swept Source
      Feature Of The Week 5/23/10: Swept source detection optical coherence tomography (OCT) is becoming ever more popular as a chosen approach for clinical applications. This has to do with many factors including speed, compactness, costs, signal processing advantages, and center wavelength capability. Swept source technology continues to improve at a major rate but still achieving a high-speed sweep and long coherence length is one of the most demanding ...
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    11. Swept source type optical coherent tomography system

      Swept source type optical coherent tomography system
      A surface emission laser light source is used as a tunable laser light source. Since the surface emission laser light source can realize a broad frequency scanning range at a high speed and in the single mode, a coherent length is longer than that of a multi mode light source. For this reason, when a tomography image is calculated by executing the Fourier transform for an output obtained from an ...
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    12. 1-15 of 25 1 2 »
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  2. About Changho Chong

    Changho Chong received the B.S. degree from Yokohama National University, Yokohama, Japan, in 1993, the M.S. degree from the University of Southern California, Los Angeles, in 1995, and received Ph.D. in physics from Yokohama National University, in 2009. From 1995 to 1998, he was with Omron Central Laboratories, involved in R&D in optoelectronics. In 1997, he was a Visiting Researcher in the Technology Research Institute of Osaka for MEMS research. He is currently a researcher/board of director at Santec Corporation, Aichi, Japan, and has been involved in R&D of optical component and tunable lasers, and OCT project.

  3. Quotes

    1. Santec is committed to developing advanced OCT tools that give our customers a combination of the best hardware and software features for optimal imaging efficiency...the IVS-300 system is our latest system built on Santec innovative technology and underlines our drive to bring SS-OCT to a wide range of applications.
      In New Compact High Performance Swept Source OCT Console From Santec