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Quantitative differential phase measurement and imaging in transparent and turbid media by optical coherence tomography

机译：光学相干层析成像技术在透明和浑浊介质中定量差分相位测量和成像

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Differential phase-contrast optical coherence tomography allows one to measure the path-length differences of two transversally separated beams in the nanometer range. We calculate these path-length differences ti-om the phase functions of the interferometric signals. Pure phase objects consisting of chromium layers containing steps of approximately 100-200-nm height were imaged. Phase differences can be measured with a precision of +/-2 degrees, corresponding to a path-difference resolution of 2-3 nm. To investigate the influence of scattering, we imaged the phase objects through scattering layers with increasing scattering coefficients. The limit of phase imaging through these layers was at approximately 8-9 mean free path lengths thick (single pass). (C) 2001 Optical Society of America. [References: 8]
机译：差分相衬光学相干断层扫描技术可以测量纳米范围内两个横向分离光束的光程差。我们通过干涉信号的相位函数来计算这些路径长度差。对由铬层组成的纯相对象进行成像，该铬层的台阶高度约为100-200 nm。相位差可以+/- 2度的精度进行测量，对应于2-3 nm的路径差分辨率。为了研究散射的影响，我们通过散射系数不断增加的散射层对相位对象进行了成像。通过这些层的相位成像的极限是大约8-9厚的平均自由程长度（单程）。 （C）2001年美国眼镜学会。 [参考：8]

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