20 November 2014 Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device
Author Affiliations +
Abstract
This paper proposes an endoscopic probe for optical coherence tomography (OCT) applying on side-imaging of internal organs. The probe consists of single-mode fiber, a gradient-index (GRIN) lens, and a mirror of cylindrical wedge shape attaching to a magnetized metal piece by epoxy with a short steel wire. For OCT scanning, we use magnetic field generated by a larger magnet externally to drive the rotation of the magnetized metal. Compare with other probes, our probe design has two distinct advantages: 1) The exit beam will be unobstructed during 360 degree circumference scanning because there are no connecting wires in the scanning part. 2) In principle, the probe can be made very tiny because of the simple structure consisting only the single-mode fiber, GRIN lens, reflection mirror and the magnetized metal piece. The OCT system has axial resolution of 14µm and SNR of 98.6 dB. The probe prototype we made has an outer diameter of 1.4 mm.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ziwei Pang, Jigang Wu, "Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device", Proc. SPIE 9268, Optics in Health Care and Biomedical Optics VI, 92681W (20 November 2014); doi: 10.1117/12.2071433; https://doi.org/10.1117/12.2071433
PROCEEDINGS
6 PAGES


SHARE
Back to Top