an automatic focusing system and a method of an infrared thermal imager with temperature compensation

The invention relates to an automatic focusing system and a method of an infrared thermal imager with temperature compensation, belonging to the technical field of infrared thermal imaging processing.The system includes high and low temperature environment experiment box, collimator, infrared thermal imager, focusing mirror, focusing mirror sliding screw, focusing motor, screw position sensor, FPGA embedded image processor, motor servo controller and temperature sensor of thermal imager and so on. The invention compresses the auto-focus searching range, strengthens the boundary constraint condition of the slope climbing algorithm, improves the reliability and the real-time performance of the auto-focus method, and has obvious advantages in engineering realization, aiming at the whole machine system of the thermal imager with the large zoom ratio and the long focal length optical system. 本发明涉及种具有温度补偿的红外热像仪自动对焦系统及方法，属于红外热成像处理技术领域。该系统包括高低温环境实验箱、平行光管、红外热像仪、调焦镜、调焦镜滑动丝杆、调焦电机、丝杆位置传感器、FPGA嵌入式图像处理器、电机伺服控制器和热像仪整机温度传感器等