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Proceedings Paper

High-resolution optical coherence tomography using self-adaptive FFT and array detection
Author(s): Yonghua Zhao; Zhongping Chen; Shaohua Xiang; Zhihua Ding; Hongwu Ren; J. Stuart Nelson; Jinendra K. Ranka; Robert S. Windeler; Andrew J. Stentz
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Paper Abstract

We developed a novel optical coherence tomographic (OCT) system which utilized broadband continuum generation for high axial resolution and a high numeric-aperture (N.A.) Objective for high lateral resolution (<5 micrometers ). The optimal focusing point was dynamically compensated during axial scanning so that it can be kept at the same position as the point that has an equal optical path length as that in the reference arm. This gives us uniform focusing size (<5 mum) at different depths. A new self-adaptive fast Fourier transform (FFT) algorithm was developed to digitally demodulate the interference fringes. The system employed a four-channel detector array for speckle reduction that significantly improved the image's signal-to-noise ratio.

Paper Details

Date Published: 23 May 2001
PDF: 5 pages
Proc. SPIE 4251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications V, (23 May 2001); doi: 10.1117/12.427904
Show Author Affiliations
Yonghua Zhao, Beckman Laser Institute and Medical Clinic (United States)
Zhongping Chen, Beckman Laser Institute and Medical Clinic (United States)
Shaohua Xiang, Beckman Laser Institute and Medical Clinic (United States)
Zhihua Ding, Beckman Laser Institute and Medical Clinic (United States)
Hongwu Ren, Beckman Laser Institute and Medical Clinic (United States)
J. Stuart Nelson, Beckman Laser Institute and Medical Clinic (United States)
Jinendra K. Ranka, Lucent Technologies/Bell Labs. (United States)
Robert S. Windeler, Lucent Technologies/Bell Labs. (United States)
Andrew J. Stentz, Lucent Technologies/Bell Labs. (United States)


Published in SPIE Proceedings Vol. 4251:
Coherence Domain Optical Methods in Biomedical Science and Clinical Applications V
Valery V. Tuchin; Joseph A. Izatt; James G. Fujimoto, Editor(s)

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