中文摘要：

基于VirtualLab Fusion构建了时域光学相干层析技术（time domain optical coherence tomography,TDOCT）光路系统,导入不同颗数发光二极管（light emitting diode,LED）的合成光谱,从参考镜的位置变化中获得干涉信号,以此分析出合成光源的半高宽和相干度,以及对应TDOCT的纵向分辨率.结果表明,合成光源的最大强度值随着LED颗数从1到10的增加先增加后趋向不变;而半高宽随之不断增加;TDOCT系统的纵向分辨率随之不断提高.当LED增加至3颗的时候,合成光源已经可以使TDOCT系统纵向分辨率提高至9.8μm,这与一颗超辐射发光二极管（super luminescent light-emitting diode,SLD）给出的分辨率级别相当.

英文摘要：

The light path system of time domain optical coherence tomography（TDOCT）was simulated with the software of VirtualLab fusion.The light source was synthesized with multi LED lights.The interference signal of the TDOCT was obtained by moving the reference mirror.The full width at half maximum（FWHM）and coherence length of the synthetic light source,the corresponding vertical resolutions of the TDOCT were analyzed.The results showed that the maximum intensity of the synthetic light source increased at the beginning and then kept stable with the LED lights increased from 1to 10,while the vertical resolution of the TDOCT kept increasing.When the synthetic light source was mixed with 3LED lights,the vertical resolution of the TDOCT was 9.8μm,which was similar to that by using one SLD.