| 气动光学效应中调制传递函数的计算方法 |
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| 引用本文： | 韩志平,殷兴良.气动光学效应中调制传递函数的计算方法[J].现代防御技术,2000,28(6). |
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| 作者姓名： | 韩志平 殷兴良 |
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| 作者单位： | 1. 中国航天机电集团二院二部,北京,100854
2. 中国航天机电集团,北京,100830 |
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| 摘 要： | 从Maxwell方程出发 ,推导了光在湍流中传播的调制传递函数的计算公式。依据折射率起伏相关函数的两种形式 ,计算了光学相位差。根据湍流的动能和动能耗散率输运方程 ,建立了折射率起伏方差的计算模型。最后 ,指出了文中所给公式的适用范围 ,对更好地进行调制传递函数的计算提出了建议。
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| 关 键 词： | 气动光学效应 导引头 湍流 相位 折射率 |
A Method to Calculate Modulation Transfer Function for Aerodynamic Optical Effect |
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| HAN Zhi-ping,YIN Xing-liang.A Method to Calculate Modulation Transfer Function for Aerodynamic Optical Effect[J].Modern Defence Technology,2000,28(6). |
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| Authors: | HAN Zhi-ping YIN Xing-liang |
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| Abstract: | The formula to calculate modulation transfer function (MTF) is deduced from Maxwell's equations when wave front propagates through turbulent flow.According to correlation function of the refractivity fluctuations,the optical phase degradation is calculated.Based on turbulent kinetic energy and the rate of turbulent dissipation transport equations,the equation to calculate variance of the refractivity fluctuation is modeled.Finally,the limitations to the formulas are pointed out,and the suggestions for the better calculation of MTF are given. |
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| Keywords: | Aerodynamic optical effect Seeker Turbulent flow Phase Refractiv |
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