基于扫频OCT的高精度三维成像测量系统研究

Research on High Precision 3D Imaging Measurement System Based on Swept-source OCT

为实现高精度的快速精密测量,文章依据调频连续波激光雷达(FMCW)基本原理,并结合扫频光学相干层析成像技术(扫频OCT),设计搭建了一套基于扫频OCT的高精度三维测量成像系统。本系统不仅通过光学结构优化、A-scan同步设计和非线性采样等技术实现系统在硬件层面的性能提升,还采用控制系统优化、B-scan平均光谱法、色散补偿等方法从软件层面进一步提升系统的成像性能。成像实验和成像系统性能测试结果都表明该系统具有较高的成像性能,可以实现测量精度为7.6μm的快速三维成像。

In order to realize the fast and precise measurement,this paper designs a high precision 3D imaging measurement system based on the frequency modulated continuous wave(FMCW)laser radar and swept source optical coherence tomography(Swept-source OCT).This paper not only improves the performance of the system at the hardware level through optical structure optimization,A-scan synchronization control and nonlinear sam-pling method,but also further improves the imaging performance of the system at the sofware level through the control system optimization,B-scan average spectrum method and dispersion compensation.The results of the imaging experiment and imaging system performance test show that the system has high imaging performance,and can realize rapid 3D imaging with a measurement accuracy of 7.6μm.