高性能超二代像增强器及发展  

High Performance Super Second Generation Image Intensifier and Its Further Development

作　　者：李晓峰[1,2] 赵恒 张彦云 张勤东[1] LI Xiaofeng;ZHAO Heng;ZHANG Yanyun;ZHANG Qindong(North Night Vision Technology Co.,Ltd,Kunming 650217,China;Science and Technology on Low-light-level Night Vision Laboratory,Xi’an 710065,China)

机构地区：[1]北方夜视技术股份有限公司,云南昆明650217 [2]微光夜视技术重点实验室,陕西西安710065

出　　处：《红外技术》2021年第9期811-816,共6页Infrared Technology

基　　金：国家自然科学基金(11535014)。

摘　　要：本文介绍了高性能超二代像增强器的技术特征及性能,并与普通超二代像增强器进行了比较,提出了进一步改进高性能超二代像增强器性能的技术途径。超二代像增强器是在二代像增强器基础上,采用新技术、新工艺和新材料而发展起来的,性能较二代像增强器有大幅提升。近年来,超二代像增强器由于使用了光栅窗,性能又有了进一步的提升。光栅窗的使用,增加了Na2KSb光电阴极膜层的吸收系数,使阴极灵敏度达到1000μA×lm-1以上,10-4 lx照度条件下的分辨力达到17 lp×mm^(-1)以上。可以预计,通过进一步优化和改进Na2KSb光电阴极膜层的制作工艺,同时进一步优化光栅窗的结构,提高光栅窗的增强系数,那么Na2KSb光电阴极的灵敏度将会达到1350~1800μA×lm-1,信噪比达到35~40;通过4μm小丝径MCP以及3μm光纤面板的应用,分辨力将会达到81 lp×mm^(-1)以上。This paper presents the technical characteristics and performance of high performance super second generation image intensifier,compares it with ordinary super second generation image intensifier,and puts forward the technical measures to further improve the performance of high performance super second generation image intensifier.Super second generation image intensifier is a kind of image intensifier with higher performance over second generation image intensifier.It was developed by application of new technology,new craft and new material on the base of the second generation image intensifier.After nearly 30 years of development,its performance has been greatly improved.In recent years,due to the use of grating window on the super second generation image intensifier,the sensitivity of the Na2KSb photocathode is over 1000μA·lm-1,and the resolution is above 17 lp·mm^(-1) on the illumination of 10-4 lx.It would be predicted that the sensitivity of Na2KSb photocathode will reach 1350-1800μA×lm-1,and the signal-to-noise ratio will reach 35-40 by further improving the fabrication process of Na2KSb film and optimizing the structure of grating.It would be predicted that the resolution will reach 81 lp·mm^(-1)through use of microchannel plate of 4μm diameter and fiber optical plate of 3μm diameter,the resolution is likely to reach 81 lp·mm^(-1).

关 键 词：像增强器 光栅 灵敏度 分辨力 信噪比 

分 类 号：TN223[电子电信—物理电子学] Q462.3[生物学—生理学]