影响双干涉仪串联手持式FFOCT系统成像特性的主要因素分析

Main Factor Analysis for Imaging Performance of Hand-Held Full-Field Optical Coherence Tomography System with Dual Interferometers

报道一个改进的基于双干涉仪串联的手持式全场光学相干层析成像(FFOCT)系统。该系统中迈克耳孙干涉仪作补偿干涉仪,菲佐干涉仪作探测干涉仪,并在原有的系统基础上增设了一个平面反射镜以改变系统光路,便于样品的水平放置。分析了反射镜与其他系统主要元件的角度偏移对系统成像质量和系统补偿距离的影响。所获得的结果对手持式FFOCT系统的设计具有重要的指导意义。

In this study,we report an improved hand-held full-field optical coherence tomography(FFOCT)system based on a combination of double interferometers.The system uses a Fizeau interferometer for detection and a Michelson interferometer for compensation.The initial system was modified by the addition of a plane mirror to alter its optical path and to make it easier to arrange samples horizontally.The analysis was conducted on how the system’s imaging quality and compensation distance were affected by the angle deviation between the mirror and other key components of the system.The obtained results are useful for the design and optimization of the hand-held FFOCT system.