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Proceedings Paper

Artifacts cancellation in Fourier domain optical coherence tomography using balance detection
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Paper Abstract

A Fourier domain optical coherence tomography system equipped with two spectrometers in balance detection is presented. The set-up was successfully used in reducing two artifacts present in Fourier domain optical coherence tomography images: autocorrelation terms and fixed pattern noise. Conditions and adjustments of spectrometer parameters are presented to ensure an anti-phase channelled spectrum modulation along the length of the two cameras for a majority of wavelengths within the optical source spectrum. By stopping the optical signal to reach one of the spectrometers, the set-up was used to compare the conditions of operation of a single camera with that of a balanced configuration. Using as a sample a tooth, balanced detection technique is compared with techniques applied to conventional single camera set-ups, based on sequential deduction of averaged spectra collected with different on/off settings for the sample or reference beams. It is concluded that balance detection performs better than single camera techniques, is more tolerant to movement, exhibits longer-term stability and can operate dynamically in real time.

Paper Details

Date Published: 18 November 2013
PDF: 7 pages
Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785E4 (18 November 2013); doi: 10.1117/12.2026390
Show Author Affiliations
Adrian Bradu, Univ. of Kent (United Kingdom)
Adrian Gh. Podoleanu, Univ. of Kent (United Kingdom)


Published in SPIE Proceedings Vol. 8785:
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications
Manuel Filipe P. C. Martins Costa, Editor(s)

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