Tian Jiahang, Lin Jieqiong, Lu Mingming, Ran Tonghuan, Zhou Jiakang
Appl Opt. 2021 May 1;60(13):3668-3676. doi: 10.1364/AO.419796.
The ambient temperature is one of the important factors that affects the imaging quality of aspherical airborne camera. In order to evaluate the imaging quality of an airborne camera under the effect of ambient temperature and predict the influence of the ambient temperature on the modulation transfer function (MTF) of the airborne camera, on the basis of the imaging principle and the material properties of lenses of the airborne camera, this study integrates theoretical analysis, simulation analysis, and experimental tests to study the influence of ambient temperature on the imaging performance of airborne cameras. The imaging performance of an airborne camera is characterized by using the MTF. First, a mathematical model is presented to analyze the effect of ambient temperature on the MTF of the airborne camera. Then the simulation analysis and experiment tests are, respectively, proposed. The results of the mathematical model are compared, respectively, with the results of the simulation analysis and experimental test, and the comparison shows that the variation trends of the mathematical model results are in line with the simulation results and the experimental results, respectively. Therefore, the mathematical model presented in this study is effective for analyzing the influence of ambient temperature variation on the MTF of airborne cameras.
环境温度是影响非球面机载相机成像质量的重要因素之一。为了评估机载相机在环境温度影响下的成像质量，并预测环境温度对机载相机调制传递函数（MTF）的影响，基于机载相机的成像原理和镜头材料特性，本研究综合理论分析、仿真分析和实验测试，研究环境温度对机载相机成像性能的影响。机载相机的成像性能采用MTF进行表征。首先，建立数学模型分析环境温度对机载相机MTF的影响。然后分别进行仿真分析和实验测试。将数学模型的结果分别与仿真分析结果和实验测试结果进行比较，比较结果表明数学模型结果的变化趋势分别与仿真结果和实验结果一致。因此，本研究提出的数学模型对于分析环境温度变化对机载相机MTF的影响是有效的。
