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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 20 — Sep. 27, 2010
  • pp: 21183–21197

Semi-resonant operation of a fiber-cantilever piezotube scanner for stable optical coherence tomography endoscope imaging

Sucbei Moon, Sang-Won Lee, Marc Rubinstein, Brian J. F. Wong, and Zhongping Chen  »View Author Affiliations


Optics Express, Vol. 18, Issue 20, pp. 21183-21197 (2010)
http://dx.doi.org/10.1364/OE.18.021183


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Abstract

A forward-view optical coherence tomography (OCT) scanning catheter has been developed based on a fiber-cantilever piezotube scanner by using a semi-resonant scan strategy for a better scan performance. A compact endoscope catheter was fabricated by using a tubular piezoelectric actuator with quartered electrodes in combination with a resonant fiber cantilever. A cantilever weight was attached to the fiber cantilever to reduce the resonance frequency down to 63 Hz, well in the desirable range for Fourier-domain OCT. The resonant-cantilever scanner was driven at semi-resonance frequencies that were well out of the resonance peak but within a range of partial resonance. This driving strategy has been found to minimize the phase difference between the two scan axes for a better scan stability against environmental perturbations as well as for a driving simplicity. By driving the two axes at slightly different frequencies, a low-order Lissajous pattern has been obtained for a 2D area scan. 3D OCT images have been successfully acquired in an acquisition time of 1.56 seconds for a tomogram volume of 2.2 × 2.2 × 2.1 mm3. They were reconstructed without any scan calibration by extracting the scan timing from the image data. In addition, it has been found that the Lissajous scan strategy provides a means to compensate the relative axial motion of a sample for a correct imaged morphology.

© 2010 OSA

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(120.5800) Instrumentation, measurement, and metrology : Scanners
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography

ToC Category:
Medical Optics and Biotechnology

History
Original Manuscript: June 30, 2010
Revised Manuscript: August 13, 2010
Manuscript Accepted: August 19, 2010
Published: September 22, 2010

Virtual Issues
Vol. 5, Iss. 14 Virtual Journal for Biomedical Optics

Citation
Sucbei Moon, Sang-Won Lee, Marc Rubinstein, Brian J. F. Wong, and Zhongping Chen, "Semi-resonant operation of a fiber-cantilever piezotube scanner for stable optical coherence tomography endoscope imaging," Opt. Express 18, 21183-21197 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-20-21183


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