TY - JOUR
T1 - Adaptive optimization of reference intensity for optical coherence imaging using galvanometric mirror tilting method
AU - Kim, Ji hyun
AU - Han, Jae Ho
AU - Jeong, Jichai
N1 - Funding Information:
This research was supported in part by a Korea University Grant, the Brain Korea 21 PLUS Program through the National Research Foundation of Korea funded by the Ministry of Education , and by the Basic Science Research Program through the National Research Foundation of Korea ( 2013R1A1A2062448 ).
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/9/15
Y1 - 2015/9/15
N2 - 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.
AB - 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.
KW - Biomedical imaging
KW - Microscopy
KW - Optical imaging
KW - Optical interferometry
KW - Optical signal detection
KW - Tomography
UR - http://www.scopus.com/inward/record.url?scp=84928710948&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2015.04.041
DO - 10.1016/j.optcom.2015.04.041
M3 - Article
AN - SCOPUS:84928710948
VL - 351
SP - 57
EP - 62
JO - Optics Communications
JF - Optics Communications
SN - 0030-4018
M1 - 20092
ER -