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大型光电系统在对运动目标进行成像或跟踪时，要求其光学系统的焦距能够根据探测目标的距离进行实时调整，使得目标能够清晰地成像在光学系统后的探测器靶面上，便于系统对探测到的目标图像数据进行后续处理。文中采用激光测距仪测量运动目标的距离，由调焦控制电路实时对大型光电系统进行自动调焦并给出了调焦控制电路的结构和模拟实验结果
Large-scale optoelectronic system in the moving target imaging or tracking, requiring its optical system focal length can be adjusted in real time according to the distance of the detection target, so that the target can be clearly imaged in the optical system after the probe target surface, the system for detection To the target image data for subsequent processing. In this paper, the laser range finder is used to measure the distance of the moving target. The focusing control circuit real-time realizes the auto-focusing on the large-scale photoelectric system and gives the structure and simulation results of the focusing control circuit