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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 13 — Jul. 1, 2005
  • pp: 1680–1682

Continuous focus tracking for real-time optical coherence tomography

Michael J. Cobb, Xiumei Liu, and Xingde Li  »View Author Affiliations


Optics Letters, Vol. 30, Issue 13, pp. 1680-1682 (2005)
http://dx.doi.org/10.1364/OL.30.001680


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Abstract

We report an approach to achieving continuous focus tracking and a depth-independent transverse resolution for real-time optical coherence tomography (OCT) imaging. Continuous real-time focus tracking is permitted by use of a lateral-priority image acquisition sequence in which the depth-scanning rate is equivalent to the imaging frame rate. Real-time OCT imaging with continuous focus tracking is performed at 1 frame/s by reciprocal translation of a rapid lateral-scanning miniature imaging probe (e.g., an endoscope). The optical path length in the reference arm is scanned synchronously to ensure that the coherence gate coincides with the imaging beam focus. The image quality improvement is experimentally demonstrated by imaging a tissue phantom embedded with polystyrene microspheres and rabbit esophageal tissues.

© 2005 Optical Society of America

OCIS Codes
(060.2350) Fiber optics and optical communications : Fiber optics imaging
(110.2350) Imaging systems : Fiber optics imaging
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(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

Citation
Michael J. Cobb, Xiumei Liu, and Xingde Li, "Continuous focus tracking for real-time optical coherence tomography," Opt. Lett. 30, 1680-1682 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-13-1680

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