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Inherent homogenous media dispersion compensation in frequency domain optical coherence tomography by accurate k-sampling

机译:精确k采样在频域光学相干层析成像中固有的均匀介质色散补偿

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摘要

Depth dependent broadening of the axial point spread function due to dispersion in the imaged media, and algorithms for postprocess correction, have been previously described for both time domain and frequency domain optical coherence tomography. We show that homogeneous media dispersion artifacts disappear when frequency domain samples are acquired with uniform spacing in circular wavenumber, as opposed to uniform sampling in optical frequency. We further explicate the source of this point spread broadening and simulate its magnitude in aqueous media. We experimentally demonstrate media dispersion compensation in high dispersion glass by choosing sample frequencies at equal intervals of media index of refraction divided by vacuum wavelength, and we recover unbroadened reflections without an additional postprocessing step. (c) 2008 Optical Society of America.
机译:先前已经针对时域和频域光学相干层析成像技术描述了由于成像介质中的色散而引起的轴点扩展函数的深度依赖展宽,以及用于后处理校正的算法。我们显示,当获取频域样本时,均匀的介质色散伪像消失了,圆波数中的间隔均匀,这与光频率中的均匀采样相反。我们进一步阐述了该点扩散加宽的来源,并模拟了其在水性介质中的大小。我们通过选择等间隔的介质折射率除以真空波长的样本频率来实验性地证明高色散玻璃中的介质色散补偿,并且无需额外的后处理步骤即可恢复未展宽的反射。 (c)2008年美国眼镜学会。

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