光学相干层析信号的模拟分析与计算

对传统的模拟介质散射响应函数的蒙特卡罗算法的计算过程进行了改进，提出光子不可分割的假设，这样可以避免人为选定光子被吸收阈值的不确定性；同时采用双曲线法模拟入射高斯光束，解决了对表面为非平面介质的传输信号进行模拟的问题.通过对盖玻片（平面）与眼角膜（曲面）的光学相干层析探测信号及层析图的数值模拟，并与相应实验结果进行比较，证实了该方法与假设的可行性.关键词：光学相干层析蒙特卡罗法模拟散射

Simulation of optical coherence tomography using Monte Carlo method

The new assumption that a photon cannot be split is made in the Monte Carlo simulation for optical scattering response function is made,which eliminates the uncertainly in arbitrarily choosing the threshold of photon death.A hyperbolic method is proposed to simulate the Gaussian beam used in optical coherence tomography systems where curved sample interfaces are encountered.Comparison between the calculated OCT pictures of a microscope slide(flat interface)and a cornea(curved interface)with the corresponding experimental ones indicates the effectiveness and the relative advantage of our new simulation method.