Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device

Ziwei Pang; Jigang Wu

doi:10.1117/12.2071433

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20 November 2014 Miniaturized endoscopic probe for optical coherence tomography with a tiny magnet driving device

Proceedings Volume 9268, Optics in Health Care and Biomedical Optics VI; 92681W (2014) https://doi.org/10.1117/12.2071433
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

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.

Citation Download Citation

Ziwei Pang and 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); https://doi.org/10.1117/12.2071433

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