| 有限湍流尺度对红外大气成像系统分辨率的影响 |
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| 引用本文： | 张逸新,陶纯堪.有限湍流尺度对红外大气成像系统分辨率的影响[J].红外与激光工程,2005,34(2):192-194,199. |
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| 作者姓名： | 张逸新 陶纯堪 |
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| 作者单位： | 江南大学,理学院,江苏,无锡,214036;南京理工大学,电子工程与光电技术学院,江苏,南京,210014;南京理工大学,电子工程与光电技术学院,江苏,南京,210014 |
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| 基金项目： | 教育部重点科学技术资助项目(01091) |
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| 摘 要： | 采用包含大气湍流内、外尺度的调制折射率谱函数分析了湍流尺度对Fried相干参数(大气相干直径)的影响，给出了Fried参数修正关系。结果表明大气湍流的内尺度对Fried相干参数影响不大，然而由于尺度为L0的大气湍流透镜和相干Fried湍涡的相互作用以及它们对传播光波的衍射作用，有限大气湍流外尺度“增大”了Fried大气相干直径。
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| 关 键 词： | 湍流尺度 Fried参数 折射率功率谱 分辨率 |
| 文章编号： | 1007-2276(2005)02-0192-03 |
| 收稿时间： | 2004/4/16 |
Effect of finite turbulence-scale on the resolutions of infrared imaging system in atmosphere |
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| ZHANG Yi-xin,TAO Chun-kan.Effect of finite turbulence-scale on the resolutions of infrared imaging system in atmosphere[J].Infrared and Laser Engineering,2005,34(2):192-194,199. |
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| Authors: | ZHANG Yi-xin TAO Chun-kan |
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| Affiliation: | ZHANG Yi-xin1,2,TAO Chun-kan2 |
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| Abstract: | Based on the modulation model of the power spectrum of refractive index fluctuation that includes the outer-and inner-scale, the effect of the finite outer-scale of the atmospheric turbulence on Fried coherence parameter is studied and a modified Fried parameter is developed. Results clearly show that atmospheric transverse coherence diameter is increased when the finite outer-scale of the atmospheric turbulence is considered, and the effect of inner-scale on atmospheric transverse coherence diameter can be ignored, because of the action between the atmosphere-turbulence lenses with the diameter (turbulent out-scale) and the Fried coherent lenses with the diameter (Fried parameter). |
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| Keywords: | Turbulence-scale Fried parameter Power spectrum of refractive index fluctuation Resolutions |
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