应用光学, 2008, 29 (3): 0351, 网络出版: 2010-06-03
双近贴聚焦微光像增强器分辨力理论极限问题研究
Theoretical resolution limit of double-proximity focusing image intensifiers
微光像增强器 像增强器 微通道板(MCP) 近贴聚焦 分辨力 傅里叶频谱 image intensifier MCP proximity focusing resolution MTF Fourier spectrum MTF
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。
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 96.6 lp/mm and 98.1 lp/mm.
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): 0351. XIANG Shi-ming. Theoretical resolution limit of double-proximity focusing image intensifiers[J]. Journal of Applied Optics, 2008, 29(3): 0351.