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一、引言夜视仪的核心部分是象增强器。一般地说,象增强器的物理作用有:(1)将辐射象转换成电子象;(2)用电子能量和电子数目增强的方式把电子象增强;(3)增强了的电子象再转换成可见象。基本结构有光电阴极、聚焦透镜、荧光屏。光电阴极将微弱的夜天光转换为光电子,经聚焦透镜系统加速和聚焦,然后打到荧光屏上,则荧光屏再现可见象。这种夜视器件能进行夜间观察的基本因素是:(1)较宽的光谱灵敏度,因为夜空辐射大
I. INTRODUCTION The core part of night vision instrument is elephant booster. In general, image intensifiers have the physical role of (1) converting radiation images into electronic images, (2) enhancing electronic images with an increase in electron energy and electron number, (3) enhanced electronic image re-conversion Into a visible image. The basic structure of a photocathode, focusing lens, fluorescent screen. Photocathode will be weak night sky light into photoelectrons, the focus lens system to accelerate and focus, and then hit the screen, the screen reproduce the visible image. The basic elements that allow night-time viewing of such night vision devices are: (1) a wider spectral sensitivity because of the large night sky radiation