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High-resolution computed tomography of refractive index distribution by transillumination low-coherence interferometry

机译:透射光低相干干涉法对折射率分布的高分辨率计算机断层扫描

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摘要

We present a method to image refractive index distribution within a sample across 8 mm dimension with high spatial resolution by a transmission low-coherence interferometer. The relative strong forward-scattering light is collected, from which the parallel projections of refractive indices within the sample are obtained. A convolution backprojection algorithm is used to transform the projection data set recorded at sufficient angular views into the spatial distribution of refractive indices within the sample. We experimentally demonstrate this method by imaging a phantom. We show that this method can achieve a precision of 0.01 in determining the refractive index and a spatial resolution of 40 (mu)m.
机译:我们提出了一种通过透射低相干干涉仪以高空间分辨率对样品在8 mm尺寸内的折射率分布进行成像的方法。收集相对强的前向散射光,从中获得样品内折射率的平行投影。卷积反投影算法用于将以足够的角度视图记录的投影数据集转换为样本内折射率的空间分布。我们通过对幻像成像实验性地证明了该方法。我们表明,该方法在确定折射率和40μm的空间分辨率方面可以达到0.01的精度。

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