以太赫兹(THz)量子级联激光器为光源、低温热辐射计为信号接收端,采用可旋转和平移的二维扫描平台搭建反射式快速扫描成像系统。通过计算机控制扫描平台进行连续的旋转与平移运动,实时获取探测信号强度和样品位置信息,成功实现对直径为80mm圆形区域的快速扫描成像,扫描时间为5s,图像的平均空间分辨率约为1mm,系统成像时间大幅缩短。此外,成像装置中基于THz分束片的共光路设计,可有效减少系统光路元件,进一步缩小成像系统的体积。 A THz quantum cascade laser is used as a light source and a low-temperature thermal radiometer is used as a signal receiving end. A two-dimensional rotatable and translatable scanning platform is used to construct a reflective fast scanning imaging system. Through computer-controlled scanning platform for continuous rotation and translational movement, real-time acquisition of signal strength and sample position information, the successful realization of a circular area of ​​80mm in diameter fast scan imaging, the scan time is 5s, the average spatial resolution of the image is about 1mm, system imaging time significantly reduced. In addition, the common optical path design based on the THz beam splitter in the imaging device can effectively reduce the optical path components of the system and further reduce the volume of the imaging system.