Fiber type of optical coherence tomography with an auto-focus device

Yu Lung Lo, Chih Chung Yen, Shean Jen Chen

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)


Optical coherence tomography (OCT) is a novel technique for non-invasive imaging based on low coherence interferometer. In this study, we develop a new optical fiber type of OCT with a commercial auto-focus device to simultaneously measure the refractive index and thickness of a single-layer for demonstration. An auto-focus device can be easily implemented into the new OCT in order to diminish the measurement error resulting from the slight vibration of the sample and/or the sample stage. However, if the conventional OCT is implemented with an auto-focus device, it would be extremely difficult in locating and controlling the positions of the sample and scanning stages. From the experimental results, the error percentage from various frequency of the simulated noise is almost under 0.4%. Due to the resonance frequency of a DVD pickup head is around 40 Hz, the error percentage is apparently highest up to 1%; however still acceptable. It is concluded that the auto-focus device indeed works in an OCT system.

頁(從 - 到)70-77
期刊Optics Communications
出版狀態Published - 2006 3月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 物理與理論化學
  • 電氣與電子工程


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