Concentrically Symmetric Hollow Core Interferometer for Common Path Optical Coherence Tomography
A hollow core, concentrically symmetric, beam splitting, Michaelson interferometer for common-path, Fourier-domain Optical Coherence Tomography has been demonstrated and analyzed. The key component of the system is a compact, small diameter probe composed of a collimating lens, hollow core beam splitting tube, and a focusing lens. The beam splitting tube is created by sputter coating the distal endface of a finely polished thick wall capillary tube with a highly reflective gold layer. Light from a coherent source is coupled into the tube. Part of the light travels through the wall of the tube is reflected by the distal endface forming a reference arm and part passes through the hollow core to be backscattered by the sample material forming a sample arm. To demonstrate the functionality and utility of the probe, cross-sectional and volumetric images of various samples have been obtained. Some advantages of this system include a small probe diameter and an easily adjustable working distance.
Y. Zhang et al., "Concentrically Symmetric Hollow Core Interferometer for Common Path Optical Coherence Tomography," Proceedings of the 57th International Instrumentation Symposium (2011, St. Louis, MO), International Society of Automation, Jun 2011.
57th International Instrumentation Symposium (2011: Jun. 20-24, St. Louis, MO)
Electrical and Computer Engineering
Keywords and Phrases
Common path; Concentric; Endoscopic; Fourier-domain; Hollow; In-axis; OCT; Gold coatings; Interferometers; Optical tomography; Probes; Tubes (components)
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2011 International Society of Automation, All rights reserved.
01 Jun 2011