Correlation of static speckle with sample properties in optical coherence tomography

Timothy Hillman, S.G. Adie, V. Seeman, Julian Armstrong, S.L. Jacques, David Sampson

    Research output: Contribution to journalArticle

    52 Citations (Scopus)


    We present theoretical calculations, based on a random phasor sum model, which show that the optical coherence tomography speckle contrast ratio is dependent on the local density of scattering particles in a sample, provided that the effective number of scatterers in the probed volume is less than about five. We confirm these theoretical predictions experimentally, using suspensions of microspheres in water. The observed contrast ratios vary in value from the Rayleigh limit of 0.52 to in excess of 2, suggesting that the contrast ratio could be useful in optical coherence tomography, particularly when imaging in ultrahigh-resolution regimes. (c) 2006 Optical Society of America.
    Original languageEnglish
    Pages (from-to)190-192
    JournalOptics Letters
    Issue number2
    Publication statusPublished - 2006

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