External brightness adjustment of auto-gated image intensifier in vary illumination

This paper studies the methodologies to regulate the output brightness of auto-gated image intensifier by users across diverse illumination settings, in according to their specific application scenarios. Firstly, we investigated the influencing factors affecting the output brightness of auto-gated image intensifier under various illumination conditions, Subsequently, we introduced a novel approach: adjusting the MCP voltage when the illumination falls below its saturation point, otherwise adjusting the value of anode current set. Notably, these two methods can operate independently and collectively contribute to the modulation of output brightness. Finally, our findings indicate that image intensifiers using this adjustment method can achieve a range of brightness changes from 0 d/m² to 12cd/m², spanning illumination levels from 5×10^-5 lx to 5×10² lx, and this capability can effectively fulfils the diverse requirements of various night vision devices.