Fiber type of Optical coherence tomography with auto-focus design

Yu Lung Lo, Zhi Zhong Yan, Shean Jen Chen

Research output: Contribution to journalConference articlepeer-review


Optical coherence tomography (OCT) is a novel technique for noninvasive imaging based on low coherence interferometer. In order to get image with high resolution, the highly precise scanning and sample stages are essential. In this study, we develop a new optical fiber type of OCT with a commercial auto-focus device to simultaneously measure refractive index and thickness of a single-layer for demonstration. In order to diminish the measurement error resulting from the slight vibration of the sample or sample stage, we design an auto-focus device into the new OCT system. As compared to the conventional one, the new OCT setup is simpler and processes the data speedily. It is found that the conventional OCT with an auto-focus device would be extremely difficult in controlling stages.

Original languageEnglish
Article number61
Pages (from-to)258-261
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5855 PART I
Publication statusPublished - 2005
Event17th International Conference on Optical Fibre Sensors, OFS-17 - Bruges, Belgium
Duration: 2005 May 232005 May 27

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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