1. Speckle properties of the logarithmically transformed signal in optical coherence tomography

    Speckle properties of the logarithmically transformed signal in optical coherence tomography

    We discuss the statistical properties of speckle of the logarithmically transformed signal in optical coherence tomography (OCT) both theoretically and experimentally. OCT signals of Intralipid solution with different volume particle concentrations ρ (correspondingly, scattering coefficient μs ranges from 1.25 to 25.11 mm−1) were measured and analyzed under two different focusing conditions [numerical apertures (NAs) of the objective lens of 0.13 and 0.25]. We found that the effect of the speckle noise can be suppressed by displaying OCT images in the logarithmic scale and by using the objective lens with a higher NA. We also found that ...

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