Artifacts cancellation in Fourier domain optical coherence tomography using balance detection

Adrian Bradu; Adrian Gh. Podoleanu

doi:10.1117/12.2026390

18 November 2013 Artifacts cancellation in Fourier domain optical coherence tomography using balance detection

Adrian Bradu, Adrian Gh. Podoleanu

Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 8785E4 (2013) https://doi.org/10.1117/12.2026390
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

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.

Citation Download Citation

Adrian Bradu and Adrian Gh. Podoleanu "Artifacts cancellation in Fourier domain optical coherence tomography using balance detection", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 8785E4 (18 November 2013); https://doi.org/10.1117/12.2026390

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