Research On Imaging Quality Simulation Of Infrared Imaging Sensor In Outer Space

This paper deals with the infrared imaging sensor in outer space. The influence of typical factors in outer space to the infrared imaging sensor is studied.These typical factors are divided into two parts: one is the external environment (including particles radiation and temperature), the other is the movement of platform (including high-frequency vibration, low-frequency vibration, and random jitter). Base on the analysis of space environment, this paper presents the action mechanism of particles radiation and temperature to infrared imaging sensor. MTF models under these factors are established, respectively. Imaging under the condition of different fluency and energy of particles is simulated. The situation which face to the sun, back to the sun, and in the time of solar outburst is discussed. Base on the analysis of vibration forms on the platform, the expression of MTF in axial vibration is deduced by line spread function. According to different equations of vibration, MTF models under different vibration forms are established. The feature which including amplitude, frequency, time of exposure, and mean square value of angular displacement are considered. Finally, the imaging results are given.