The imaging mechanism to measurement depth structure is analysed,which can be described precisely by a coherence transfer function(CTF),because fiber-optic have eigen mode and coherent to the response of optical amplitude and phase.

• 着重分析了该技术测量样品纵深结构时图像的成像机理。 由于光纤具有本征场的模式 ,对光的振幅和相位的响应是相干的 ,从而可用相干传递函数 (CTF)描述系统性能。