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High-sensitivity anastigmatic imaging needle for optical coherence tomography |
Optics Letters, Vol. 37, Issue 24, pp. 5247-5249 (2012)
http://dx.doi.org/10.1364/OL.37.005247
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Abstract
We present a high-optical-quality imaging needle for optical coherence tomography (OCT) that achieves sensitivity and resolution comparable to conventional free-space OCT sample arms. The side-viewing needle design utilizes total internal reflection from an angle-polished fiber tip, encased in a glass microcapillary. Fusion of the capillary to the fiber provides a robust, optical-quality output window. The needle’s focusing optics are based on an astigmatism-free design, which exploits the “focal shift” phenomenon for focused Gaussian beams to achieve equal working distances (WDs) for both axes. We present a fabricated needle with a WD ratio of 0.98 for imaging in an aqueous environment. Our needle achieves the highest sensitivity of currently reported OCT imaging needles (112 dB), and we demonstrate its performance by superficial imaging of human skin and 3D volumetric imaging within a biological sample.
© 2012 Optical Society of America
OCIS Codes
(120.3620) Instrumentation, measurement, and metrology : Lens system design
(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
(350.3950) Other areas of optics : Micro-optics
ToC Category:
Medical Optics and Biotechnology
History
Original Manuscript: October 22, 2012
Revised Manuscript: November 22, 2012
Manuscript Accepted: November 22, 2012
Published: December 14, 2012
Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics
Citation
Loretta Scolaro, Dirk Lorenser, Robert A. McLaughlin, Bryden C. Quirk, Rodney W. Kirk, and David D. Sampson, "High-sensitivity anastigmatic imaging needle for optical coherence tomography," Opt. Lett. 37, 5247-5249 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-24-5247
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