| 由Strehl比判断光学系统实际分辨能力 |
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| 引用本文： | 张宇华,赵达尊,阎吉祥.由Strehl比判断光学系统实际分辨能力[J].光学技术,1999(5). |
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| 作者姓名： | 张宇华 赵达尊 阎吉祥 |
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| 作者单位： | 北京理工大学光电工程系,北京,100081 |
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| 摘 要： | 提出了一个根据Ｓｔｒｅｈｌ 比评价光学系统实际分辨能力的近似方法。用高斯分布函数逼近点光源在光学系统焦面上的像斑光强分布，根据瑞利判据，导出了光学系统分辨能力与Ｓｔｒｅｈｌ 比的关系方程。它可根据系统的Ｓｔｒｅｈｌ 比来判定像面上的两个像斑能否分辨开来。
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| 关 键 词： | 分辨能力 高斯函数 Strehl比 像斑光强 |
Evaluating the real resolution of optical system by Strehl ratio |
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| ZHANG Yu-hua,ZHAO Da-zun,YAN Ji-xiang.Evaluating the real resolution of optical system by Strehl ratio[J].Optical Technique,1999(5). |
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| Authors: | ZHANG Yu-hua ZHAO Da-zun YAN Ji-xiang |
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| Abstract: | A method that can approximately evaluate the real resolution of an optical system by Strehl ratio is proposed. In which Gauss function is used to approximately express the light intensity of the image spot on the focal plane and the equation that describes the relation between the real resolution and Strehl ratio is derived based on Rayleigh criterion. The method can be used to judge if two near image spots on the focal plane are resolvable. |
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| Keywords: | resolution Gauss function Strehl ratio light intensity of image spot |
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