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Correlation of static speckle with sample properties in optical coherence tomography

机译:光学相干断层扫描中静态斑点与样品性质的相关性

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摘要

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.
机译:我们基于随机相量和模型提出理论计算,该模型表明光学相干断层扫描斑点斑点对比度取决于样本中散射粒子的局部密度,只要探测体积中散射体的有效数量小于大约五个。我们使用微球在水中的悬浮液通过实验证实了这些理论预测。观察到的对比度值从0.52的瑞利极限到超过2的值变化,这表明该对比度可用于光学相干断层扫描,尤其是在超高分辨率方案中成像时。

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