针对红外成像系统因衍射光斑大导致图像分辨率低、焦平面探测器填充因子小导致图像传函值小等两大主要缺陷，提出了通过微扫描成像技术提高图像分辨率和传函值的技术方案.简要介绍了微扫描成像的工作原理，重点论述了旋转式红外微扫描器设计方法，并推导了有关设计公式.在微扫描器及其成像演示装置研制基础上，开展了微扫描成像实验，成功得到分辨率和传函值明显提高的红外图像.

Poor resolution and lower modulation thansfer function(MTF) value in infrared imaging system have been remaining for many years because of its large Airy disc of optical lens and the small fillfactor of focal plane array(FPA), respectively. This paper reported a popular way to improve the resolution and MTF of infrared images using microscanning technique. The principles were briefly described. The designing rotary IR microscanner was discussed. The rotary microscanner imaging system using a 240×320 pixels αsiuncooled FPA, and got higher resolution and MTF value of IR videos obviously.