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Proceedings Paper

Stroboscopic wide-field optical coherence gated imaging
Author(s): Woo June Choi; Jihoon Na; Jonghyun Eom; Byeong Ha Lee
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Paper Abstract

We present an advanced three-dimensional tomographic imaging system using the optical coherence gating based on stroboscopic illumination. The proposed system is based on a wide-field optical coherence tomography (WF-OCT) that is capable of en-face tomographic imaging through whole-field illumination and parallel detection technique. The scheme enables achievement of a three-dimensional volumetric image in real time only with a single axial continuous scanning. The axial scanning of the OCT system generates interferometric signal with a beat (or Doppler) frequency. The time-varying interfergams are usually detected in series with a CCD camera for the WF-OCT case. However, because the camera response is much slower than the Doppler frequency, the interference signal is averaged out for most cases. To avoid the averaging out problem of the beat signal, the input light is optically switched on and off at the same rate as the Doppler frequency generated by the axial scan. When the constructive interference components in the signal are synchronized with the stroboscopic illumination of the light source, the envelope signal of the sample can be detected by the slow camera. Compensated adaptive optic system was combined with the OCT instrument to avoid decrease of the interference signal by nonlinearity of scan motion. With the implemented WF-OCM, a lithium battery volume image of 6×4.5×0.005 (X×Y×Z) mm3 was obtained in 82 ms with axial scanning speed of 0.63 mm/s and visualized in volume rendering.

Paper Details

Date Published: 23 February 2009
PDF: 8 pages
Proc. SPIE 7169, Advanced Biomedical and Clinical Diagnostic Systems VII, 71691L (23 February 2009); doi: 10.1117/12.808917
Show Author Affiliations
Woo June Choi, Gwangju Institute of Science and Technology (Korea, Republic of)
Jihoon Na, Gwangju Institute of Science and Technology (Korea, Republic of)
Jonghyun Eom, Gwangju Institute of Science and Technology (Korea, Republic of)
Byeong Ha Lee, Gwangju Institute of Science and Technology (Korea, Republic of)

Published in SPIE Proceedings Vol. 7169:
Advanced Biomedical and Clinical Diagnostic Systems VII
Anita Mahadevan-Jansen; Tuan Vo-Dinh; Warren S. Grundfest M.D., Editor(s)

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