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Proceedings Paper

Three-dimensional time and Fourier domain endoscopic OCT using 2-axis scanning MEMS mirror
Author(s): Woonggyu Jung; Daniel T. McCormick; Yeh-Chan Ahn; Jun Zhang; Norman C. Tien; Zhongping Chen
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Paper Abstract

We present a three-dimensional (3-D) endoscopic optical coherence tomography (OCT) system based on a dual axis microelectromechanical system (MEMS) mirror. The diameter of MEMS mirror was 1.2 mm and both axes were capable of scanning up to 20° (optical) at greater than 1 kHz with excellent linearity. The MEMS mirror was packaged in a machined acrylic endoscopic housing which provided mechanical protection and electrical interconnects as well as optical alignment of the MEMS device to a focusing GRIN lens. The endoscopic MEMS probe was integrated and tested with both a fiber-based time domain (TD) OCT system and Fourier domain (FD) OCT system. Combining the 2-axis lateral scanning of the MEMS device with an axial scan allowed 3-D volume images to be obtained at a rate of 3 frames/s for the TD system and 7 frames/s for the FD system. In the initial investigations, in vivo 3-D OCT images of a human finger as well as images of animal tissue such as healthy rabbit trachea, normal and cancerous regions of hamster cheek pouch tissue were obtained. These images allowed real-time diagnosis of diseased tissue and also clearly delineated important features and tissue structures.

Paper Details

Date Published: 20 February 2006
PDF: 6 pages
Proc. SPIE 6079, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X, 60791I (20 February 2006); doi: 10.1117/12.649178
Show Author Affiliations
Woonggyu Jung, Univ. of California, Irvine (United States)
Daniel T. McCormick, Univ. of California, Berkeley (United States)
Yeh-Chan Ahn, Univ. of California, Irvine (United States)
Jun Zhang, Univ. of California, Irvine (United States)
Norman C. Tien, Case Western Reserve Univ. (United States)
Zhongping Chen, Univ. of California, Irvine (United States)

Published in SPIE Proceedings Vol. 6079:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine X
Valery V. Tuchin; Joseph A. Izatt; James G. Fujimoto, Editor(s)

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