宽场光学相干层析成像系统的机电控制设计与实现

根据宽场光学相干层析成像系统的基本原理和系统硬件组成,探讨设计了宽场光学相干层析成像系统的机电控制,机电控制主要包括3个部分:宏动台与微动台的机械控制模块、图像采集模块以及宏动台和微动台与CCD相机的联动控制模块,通过精确控制宏动台和微动台的移动实现四步移相时对样品干涉信号的采集。实验测试证明,所设计的宽场OCT系统能够对较透明的样品的表面和次表面的干涉信号进行采集,所采集到的干涉信号经过图像重构基本再现了样品的结构特征。

The Design and Realization of Mechanical and Electrical Controls in a Wide-Field Optical Coherence Tomography System

Through analyzing the basic principle of a Wide-Field Optical Coherence Tomography system,its mechanical-electronic control in the system is explored and designed.Three parts are mainly involved in the design.They are mechanical control modules for a macro-move stage and a micro-move stage,respectively,in the system,an image acquisition module and a linkage control module for the macro-move stage,the micro-move stage and a CCD.Software for mechanical-electronic controls in the Wide-Field Optical Coherence Tomography system is developed using VC languages.The primary works in this paper are presented as follows： Through controlling the macro-move stage and the micro-move stage moving,WFOCT deals with the scanning and the acquisition of the sample interference signal by using the method of four phase-shifting.The experimental result shows： WFOCT System can absorb the interference signals of the sample on surface and subsurface.The interference signal through image reconstruction can show the structural characteristics of the samples.