Design of infrared imaging system with adaptive correction function

In view of the fact that the response of IRFPA will drift with time and temperature and the IR imaging system will be used to measure and watch, an long-wave infrared uncooled imaging system which has adaptive correction function was designed. The system is based on FPGA, in which FPGA performs system control and image processing. Architecture of the system is simple and with less power dissipation. In order to improve the performance of the detector, a temperature control circuit based on ADN8830 was introduced, which could set temperature of the detector to a fixed point. In order to correct non-uniform responses of the detector's individual elements, an adaptive non-uniformity correction algorithm was proposed based on shutter, which could compensate the response drift according to temperature and time. The system had both analog and digital video output, in which analog video could be used to watch, while digital video with 12 bit precision could be used to measure. The results show that the imaging system has the advantages of good image quality, good environmental adaptability and low power consumption.