Adaptive optimization of reference intensity for optical coherence imaging using galvanometric mirror tilting method

Ji hyun Kim, Jae Ho Han, Jichai Jeong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Abstract Integration time and reference intensity are important factors for achieving high signal-to-noise ratio (SNR) and sensitivity in optical coherence tomography (OCT). In this context, we present an adaptive optimization method of reference intensity for OCT setup. The reference intensity is automatically controlled by tilting a beam position using a Galvanometric scanning mirror system. Before sample scanning, the OCT system acquires two dimensional intensity map with normalized intensity and variables in color spaces using false-color mapping. Then, the system increases or decreases reference intensity following the map data for optimization with a given algorithm. In our experiments, the proposed method successfully corrected the reference intensity with maintaining spectral shape, enabled to change integration time without manual calibration of the reference intensity, and prevented image degradation due to over-saturation and insufficient reference intensity. Also, SNR and sensitivity could be improved by increasing integration time with automatic adjustment of the reference intensity. We believe that our findings can significantly aid in the optimization of SNR and sensitivity for optical coherence tomography systems.

Original languageEnglish
Article number20092
Pages (from-to)57-62
Number of pages6
JournalOptics Communications
Volume351
DOIs
Publication statusPublished - 2015 Sep 15

Keywords

  • Biomedical imaging
  • Microscopy
  • Optical imaging
  • Optical interferometry
  • Optical signal detection
  • Tomography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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