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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 17 — Aug. 21, 2006
  • pp: 7661–7669

Full-field time-encoded frequency-domain optical coherence tomography

Boris Považay, Angelika Unterhuber, Boris Hermann, Harald Sattmann, Holger Arthaber, and Wolfgang Drexler  »View Author Affiliations


Optics Express, Vol. 14, Issue 17, pp. 7661-7669 (2006)
http://dx.doi.org/10.1364/OE.14.007661


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Abstract

Ultrahigh axial resolution surface profiling as well as volumetric optical imaging based on time encoded optical coherence tomography in the frequency domain without any mechanical scanning element is presented. A frequency tuned broad bandwidth titanium sapphire laser is interfaced to an optical microscope (Axioskop 2 MAT, Carl Zeiss Meditec) that is enhanced with an interferometric imaging head. The system is equipped with a 640 × 480 pixel CMOS camera, optimized for the 800 nm wavelength tuning range for transmission and reflection measurements of a microscopic sample. Sample volume information over 1.3 × 1 × 0.2 mm3 with ~3 μm axial and ~4 μm transverse resolution in tissue is acquired by a single wavelength scan over more than 100 nm optical bandwidth from <760 to >860 nm with 128–2048 equidistant optical frequency steps with an acquisition time of 1 to 50 ms per step. Topography and tomography with a signal to noise ratio of 83 dB is demonstrated on test surfaces and biological specimen respectively. This novel OCT technique promises to enable high speed, three dimensional imaging by employing high frame rate cameras and state of the art tunable lasers in a mechanically stable environment, due to lack of moving components while reducing the intensity on the sample.

© 2006 Optical Society of America

OCIS Codes
(070.2590) Fourier optics and signal processing : ABCD transforms
(140.3590) Lasers and laser optics : Lasers, titanium
(140.3600) Lasers and laser optics : Lasers, tunable
(170.4500) Medical optics and biotechnology : Optical coherence tomography
(170.6960) Medical optics and biotechnology : Tomography
(180.6900) Microscopy : Three-dimensional microscopy

ToC Category:
Imaging Systems

History
Original Manuscript: March 27, 2006
Revised Manuscript: June 19, 2006
Manuscript Accepted: June 20, 2006
Published: August 21, 2006

Virtual Issues
Vol. 1, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Boris Považay, Angelika Unterhuber, Boris Hermann, Harald Sattmann, Holger Arthaber, and Wolfgang Drexler, "Full-field time-encoded frequency-domain optical coherence tomography," Opt. Express 14, 7661-7669 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-17-7661


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