双近贴聚焦微光像增强器分辨力理论极限问题研究

详细信息

Theoretical resolution limit of double-proximity focusing image intensifiers

Key Laboratory of Low-Light-Level Technology of COSTIND,Xi′an Institute of Applied Optics,Xi′an 710065,China

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。
- 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
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.
- image intensifier /
- MCP /
- proximity focusing /
- resolution /
- MTF /
- Fourier spectrum