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基于DMD的动态红外景象仿真系统以全数字化、高图像质量等优越的性能,在红外成像系统半实物仿真性能测试中得到越来越多的关注。文中介绍了基于DMD的动态红外景象仿真系统的基本组成与工作原理;建立了系统的性能指标体系,包括帧频、视场、出瞳口径、空间分辨率、温度分辨率、温度范围、图像对比度等,并给出系统主要性能参数的选择与确定方法;分析了系统的关键技术,如窗口更换、数据处理电路和驱动电路设计、红外照明光源设计、红外准直光学系统设计、红外热像逼真度修正等;最后指出DMD在实际应用中存在的问题,为系统设计、应用以及性能评价提供参考。
The dynamic infrared scene simulation system based on DMD gets more and more attention in semi-physical simulation performance test of infrared imaging system due to its all-digital, high image quality and other superior performance. In this paper, the basic composition and working principle of dynamic infrared scene simulation system based on DMD are introduced. The system performance index system is established, including frame rate, field of view, exit pupil diameter, spatial resolution, temperature resolution, temperature range, image contrast The key technologies of the system are analyzed, such as window replacement, data processing circuit and driving circuit design, infrared light source design, infrared collimating optical system design, infrared thermal image realism Finally, it points out the problems existed in the practical application of DMD and provides a reference for system design, application and performance evaluation.