High-resolution optical coherence tomography using self-adaptive FFT and array detection

Yonghua Zhao; Zhongping Chen; Shaohua Xiang; Zhihua Ding; Hongwu Ren; J. Stuart Nelson M.D.; Jinendra K. Ranka; Robert S. Windeler; Andrew J. Stentz

doi:10.1117/12.427904

23 May 2001 High-resolution optical coherence tomography using self-adaptive FFT and array detection

Yonghua Zhao, Zhongping Chen, Shaohua Xiang, Zhihua Ding, Hongwu Ren, J. Stuart Nelson M.D., Jinendra K. Ranka, Robert S. Windeler, Andrew J. Stentz

Author Affiliations +

Proceedings Volume 4251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications V; (2001) https://doi.org/10.1117/12.427904
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

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.

Citation Download Citation

Yonghua Zhao, Zhongping Chen, Shaohua Xiang, Zhihua Ding, Hongwu Ren, J. Stuart Nelson M.D., Jinendra K. Ranka, Robert S. Windeler, and Andrew J. Stentz "High-resolution optical coherence tomography using self-adaptive FFT and array detection", Proc. SPIE 4251, Coherence Domain Optical Methods in Biomedical Science and Clinical Applications V, (23 May 2001); https://doi.org/10.1117/12.427904

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