光学相干层析成像随深度变化的色散补偿方法
发布时间：2018-09-03 13:53
【摘要】：提出一种随深度变化的色散补偿方法,用以提升频域光学相干层析成像系统的纵向分辨率。该方法利用迭代算法计算出不同成像深度处的色散补偿系数,通过数值计算,得到色散补偿系数与成像深度的关系表达式,计算出各成像深度处的色散补偿系数,利用这些色散补偿系数消除相应深度位置处信号的高阶色散相位,从而有针对性地对系统中参考臂与样品臂的色散失配进行补偿,消除色散的展宽效应。理论推导和实验结果表明,光学相干层析成像系统中,随深度变化的色散补偿方法对各成像深度位置处的信号,包括成像深度较深位置处的弱信号,均可以进行有效的色散补偿,进而得到更多的样品结构信息。
[Abstract]:A dispersion compensation method with depth variation is proposed to improve the longitudinal resolution of optical coherence tomography system in frequency domain. In this method, the dispersion compensation coefficients at different imaging depths are calculated by iterative algorithm. By numerical calculation, the relationship between dispersion compensation coefficients and imaging depth is obtained, and the dispersion compensation coefficients at each imaging depth are calculated. These dispersion compensation coefficients are used to eliminate the higher-order dispersion phase of the signal at the corresponding depth position, so that the dispersion mismatch between the reference arm and the sample arm in the system can be compensated, and the dispersion broadening effect can be eliminated. The theoretical derivation and experimental results show that the dispersion compensation method with depth variation in optical coherence tomography system can compensate the signals at different imaging depths, including the weak signals at the deeper positions of the imaging depth. The dispersion compensation can be carried out effectively, and more information of sample structure can be obtained.
【作者单位】： 中国科学院上海光学精密机械研究所信息光学与光电技术实验室;中国科学院大学;江南大学理学院;
【基金】：上海市科学技术委员会创新行动计划(15441905600) 广西高校光电信息处理重点实验室开放基金资助项目(KFJJ2016-04)
【分类号】：TP391.41
，
本文编号：2220160
[Abstract]:A dispersion compensation method with depth variation is proposed to improve the longitudinal resolution of optical coherence tomography system in frequency domain. In this method, the dispersion compensation coefficients at different imaging depths are calculated by iterative algorithm. By numerical calculation, the relationship between dispersion compensation coefficients and imaging depth is obtained, and the dispersion compensation coefficients at each imaging depth are calculated. These dispersion compensation coefficients are used to eliminate the higher-order dispersion phase of the signal at the corresponding depth position, so that the dispersion mismatch between the reference arm and the sample arm in the system can be compensated, and the dispersion broadening effect can be eliminated. The theoretical derivation and experimental results show that the dispersion compensation method with depth variation in optical coherence tomography system can compensate the signals at different imaging depths, including the weak signals at the deeper positions of the imaging depth. The dispersion compensation can be carried out effectively, and more information of sample structure can be obtained.
【作者单位】： 中国科学院上海光学精密机械研究所信息光学与光电技术实验室;中国科学院大学;江南大学理学院;
【基金】：上海市科学技术委员会创新行动计划(15441905600) 广西高校光电信息处理重点实验室开放基金资助项目(KFJJ2016-04)
【分类号】：TP391.41
，
本文编号：2220160
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