作　　者： ; ; ; ; ;

机构地区： 暨南大学理工学院光电信息与传感技术广东普通高校重点实验室

出　　处： 《光子学报》 2010年第6期1099-1103,共5页

摘　　要： 针对通过增加光源谱宽度来提高光学相干层析成像系统分辨率时样品色散特性的限制作用,分析了色散与光学相干层析成像系统纵向光程分辨率的约束关系.根据物质色散特性,采用数值变换方法对光学相干层析成像相干成像信号进行了色散补偿.实验使用了中心波长1550nm自激发辐射光源和光纤迈克尓逊干涉结构,对水和光学快速扫描延迟线引入的二阶和三阶色散进行了数值补偿并通过相位修正因子来改善补偿效果.确定了一种普适的、快速的数值色散补偿方法.在对水中盖玻片和生物组织和的光学相干层析成像图像的色散补偿实验中取得了良好的效果,证明了方法的可行性. In order to solve the problem that dispersion in dispersive material restricts improvement of depth resolution of optical coherence tomography（OCT）with broadband optical source, a numerical posteriori dispersion compensation technique for optical coherence tomography depth-scan signals is presented. The relationship between resolution of optical coherence tomography and FWHM of optical source is analyzed. In experience,1 550 nm optical source and fiber Michelson interferometer are used to get imaging signal from planes in the water. Data of the image are compensated up to the third order optical dispersion of water and rapid optical delay line. A tunable phase factor is introduced to improve the results of compensation. Examples of dispersion compensated depth-scan signals obtained from microscope cover glasses under water and muscle tissue of mouse are presented.

关 键 词： 医用光学与生物技术 色散补偿 快速傅里叶变换 光学相干层析

领　　域： [电子电信]