| 双近贴聚焦微光像增强器分辨力理论极限问题研究 |
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| 引用本文： | 向世明. 双近贴聚焦微光像增强器分辨力理论极限问题研究[J]. 应用光学, 2008, 29(3): 351-353 |
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| 作者姓名： | 向世明 |
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| 作者单位： | 西安应用光学研究所,第二研究室,微光夜视技术国防科技重点实验室,陕西,西安,710065 |
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| 摘 要： | 分辨力和MTF是微光像增强器的2个重要参数。根据线性系统傅里叶频谱理论，分析了微光像增强器的MTF和分辨力特性。 计算出理想条件下，基于光阴极/MCP/荧光屏3部件结构以及带内电子增益机制的光阴极/荧光屏2部件结构的近贴聚焦像管的理论极限分辨力。它们分别是96.6lp/mm和98.1lp/mm。该结果可供人们改进像管MTF及分辨力特性时参考。
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| 关 键 词： | 微光像增强器 像增强器 微通道板（MCP） 近贴聚焦 分辨力 MTF 傅里叶频谱 |
| 文章编号： | 1002-2082(2008)03-0351-03 |
| 收稿时间： | 2007-03-02 |
| 修稿时间： | 2007-03-02 |
Theoretical resolution limit of double-proximity focusing image intensifiers |
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| XIANG Shi-ming. Theoretical resolution limit of double-proximity focusing image intensifiers[J]. Journal of Applied Optics, 2008, 29(3): 351-353 |
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| Authors: | XIANG Shi-ming |
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| Affiliation: | Key Laboratory of Low-Light-Level Technology of COSTIND,Xi′an Institute of Applied Optics, Xi′an 710065, China |
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| Abstract: | Resolution and MTF are two important parameters of an image intensifier. The characteristics of the two parameters of a double-proximity focusing image intensifier were analyzed by means of several expressions based on the Fourier spectral theory of linear systems. Two theoretical limiting resolutions were obtained by calculation under a series of theoretical and technologic conditions, for both constructive modes of double-proximity focusing image tubes, in which one is a normal mode of photocathode/MCP/phosphor screen, and another is a mode of electron-internal amplification photocathode/phosphor screen. The calculated results are 96.6lp/mm and 98.1lp/mm. |
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| Keywords: | image intensifier MCP proximity focusing resolution MTF Fourier spectrum |
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