Research on automatic exposure control technology for infrared focal plane detectors

Exposure time adjustment is currently the main method for increasing the dynamic range of infrared imaging systems. In view of the difficulty of measuring targets with rapidly changing radiation characteristics, an automatic exposure control method for infrared focal plane detectors was proposed. Firstly, through radiation calibration experiments, the influence of exposure time was studied, and an improved non-uniform correction method was proposed to adapt to changes in different exposure times. On this basis, an integration time prediction method was proposed based on the calibration formula, and the optimal exposure time was predicted based on the current target gray value. A threshold is set to determine whether to adjust the exposure time. Finally, simulation experiments verify the effectiveness of the algorithm. When the target radiation temperature changes continuously, the method can automatically adjust the exposure time to ensure that the output gray value is always in the valid range.