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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 10 — Nov. 8, 2013

Probe alignment and design issues of microelectromechanical system based optical coherence tomography endoscopic imaging

Can Duan, Jingjing Sun, Sean Samuelson, and Huikai Xie  »View Author Affiliations


Applied Optics, Vol. 52, Issue 26, pp. 6589-6598 (2013)
http://dx.doi.org/10.1364/AO.52.006589


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Abstract

Endoscopic optical coherence tomography (OCT) imaging has been demonstrated using microelectromechanical system (MEMS) technology by several research groups. The focus of this work is to study how the OCT imaging performance is affected by the radius of curvature of MEMS mirrors as well as the optical alignment accuracy inside small imaging probes. The goal of this study is to provide guidance for assembly tolerance and design optimization of OCT endoscopic probes. Gaussian beam propagation is used for theoretical analysis which is confirmed by optical simulation and verified experimentally with a time-domain OCT system as well. It has been found that the OCT imaging is very sensitive to the distance from the fiber end to the gradient-index (GRIN) lens, which needs to be controlled within 0.1 mm to achieve working distance (WD) longer than 3.5 mm and lateral resolution around 25 μm. The impact on image quality of the MEMS mirror is negligible if the radius of curvature of the mirror surface is greater than 200 mm. In addition, we studied the astigmatism introduced by cylindrical plastic tubing; the maximum astigmatism ratio is 1.1 when the WD is around 2.5 mm.

© 2013 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(120.4800) Instrumentation, measurement, and metrology : Optical standards and testing
(230.4685) Optical devices : Optical microelectromechanical devices

ToC Category:
Imaging Systems

History
Original Manuscript: June 25, 2013
Revised Manuscript: August 12, 2013
Manuscript Accepted: August 15, 2013
Published: September 9, 2013

Virtual Issues
Vol. 8, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Can Duan, Jingjing Sun, Sean Samuelson, and Huikai Xie, "Probe alignment and design issues of microelectromechanical system based optical coherence tomography endoscopic imaging," Appl. Opt. 52, 6589-6598 (2013)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-52-26-6589

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