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| Temperature Measurement Method for Small Target Medium-Wave
Infrared Spectral Radiation Based on Distance Correction |
| LI Wen-kai1, 2, ZHOU Liang1*, LIU Zhao-hui1, CUI Kai1, LIU Kai1, LI Zhi-guo1,XIE Mei-lin1 |
1. Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
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Abstract For long-distance space targets moving at high speeds, temperature is one of the important parameters to characterize their working state and performance. Accurately obtaining the temperature of the target has an important reference value for judging its motion state and predicting its situation development. At present, the commonly used processing method of surface target or point target is no longer applicable to the measurement of the radiation characteristics of small targets. At the same time, spectral detection increases the distinguishable information of the target in the wavelength dimension, which can accurately obtain the distribution of the target energy with wavelength, providing a possibility for the inversion of the target temperature, and has great application potential. The slitless spectrometer can reduce the requirements for tracking and stabilization accuracy of space targets, has the characteristics of simple structure, high frame rate and fast response speed, and has high application value in astronomical observation and spacecraft observation. In this paper, we analyzed the spectral calibration model of target infrared radiation characteristic measurement and determined the main parameters in the linear response model of infrared detector pixels. In order to reduce the influence of imaging distance on temperature measurement accuracy, we proposed a target temperature inversion model based on distance correction. The improved temperature measurement accuracy meets the accuracy requirements in practical engineering applications and greatly affects infrared radiation spectrum temperature measurement. Certain guiding significance.
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Received: 2022-09-07
Accepted: 2022-11-21
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Corresponding Authors:
ZHOU Liang
E-mail: zhouliang@opt.ac.cn
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