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针对红外半实物仿真试验中DMD红外景象仿真设备存在的时序同步、高帧频显示、光学匹配等使用问题,设计与研制了一套能够与常见被测红外凝视成像设备匹配使用的基于DMD的红外景象仿真设备。首先提出了合理可行的同步延时驱动方案和显示控制方案,设计与研制了同步信号处理电路和驱动电路,实现了仿真图像的时序同步和高帧频显示;其次根据常见被测红外凝视成像设备的光学参数,进行了光学系统设计与仿真,研制了照明光学系统和投影光学系统,实现了与常见被测红外凝视成像设备光学匹配。检测结果表明:该设备能够与多种被测红外凝视成像设备在时序上保持同步,并实现光学匹配,输出的仿真图像帧频可达300 Hz、最大可模拟温度为160℃、最小可模拟温差为0.03℃、最大图像对比度为0.7、空间非均匀性优于1%,已在红外半实物仿真试验中发挥了巨大作用。
Aimed at the problems of time synchronization, high frame rate display and optical matching in the simulation of infrared semi-physical simulation in infrared semi-physical simulation, a set of DMD-based infrared infrared imaging device that can be used with common measured infrared staring imaging equipment is designed and developed. Scene simulation equipment. Firstly, a reasonable and feasible synchronous delay-driven scheme and display control scheme are proposed. The synchronous signal processing circuit and the driving circuit are designed and developed to realize the timing synchronization and high frame rate display of the simulated image. Secondly, according to the common measured infrared gaze imaging equipment Of the optical parameters, the optical system design and simulation, developed a lighting optical system and projection optical system to achieve with the common measured infrared gaze imaging equipment optical matching. The test results show that the device can synchronize with a variety of measured infrared gaze imaging devices in time sequence and achieve optical matching. The output simulation image frame rate can reach 300 Hz, the maximum simulation temperature is 160 ℃, the minimum simulation temperature difference Is 0.03 ℃, the maximum image contrast is 0.7, the spatial heterogeneity is better than 1%, which has played a great role in the infrared semi-physical simulation.