| 大气湍流对光学系统图像分辨力的影响 |
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| 引用本文： | 张晓芳,俞信,阎吉祥.大气湍流对光学系统图像分辨力的影响[J].光学技术,2005,31(2):263-265. |
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| 作者姓名： | 张晓芳 俞信 阎吉祥 |
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| 作者单位： | 北京理工大学,信息科学技术学院光电工程系,北京,100081;北京理工大学,信息科学技术学院光电工程系,北京,100081;北京理工大学,信息科学技术学院光电工程系,北京,100081 |
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| 摘 要： | 讨论了大气湍流对空 地和地 空光学系统图像分辨力的影响。大气相关长度r0是评定大气湍流是否影响光学系统图像分辨力的主要依据。采用不同的大气湍流模型,通过计算相关长度得到了大气湍流对系统图像分辨力的影响,并对空 地与地 空系统的大气相关长度进行了计算比较。结果表明:对空 地观测系统来说,大气相关长度是大气层高度和反映大气湍流特征的C2n的函数。而对地 空观测系统来说,大气相关长度与高度几乎无关。分析了大气湍流对机载和星载光学遥感系统成像分辨力的影响。
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| 关 键 词： | 大气湍流 大气相关长度 成像分辨力 机载 星载 |
| 文章编号： | 1002-1582(2005)02-0263-03 |
| 修稿时间： | 2004年6月15日 |
Influence of atmospheric turbulence on image resolution of optical sensing system |
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| Zhang Xiao-fang,YU Xin,YAN Ji-xiang.Influence of atmospheric turbulence on image resolution of optical sensing system[J].Optical Technique,2005,31(2):263-265. |
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| Authors: | Zhang Xiao-fang YU Xin YAN Ji-xiang |
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| Abstract: | The atmospheric influences on image resolution of ground-to-space or space-to-ground system are analyzed. Atmospheric correlation length r_0 is the basis of evaluating the atmospheric influence on image resolution. According to different atmospheric turbulence model, r_0 has been calculated to evaluate the influence on image resolution. And r_0 comparison between ground-to-space system and space-to-ground system is presented. For space-to-ground system, r_0 is related with the altitude of atmospheric turbulence and C~2_n, and for ground-to-space system, r_0 is independent of the altitude. The influences on image resolution of space-borne system and air_borne system caused by atmospheric turbulence are discussed through calculating r_0. |
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| Keywords: | atmospheric turbulence atmospheric correlation length image resolution space-borne air-borne |
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