为了提高MCP像增强器亮度增益，在微光像增强器中采用了新的电子倍增机构，即微通道板(MCP)，并对作为电子倍增结构MCP的噪声产生机理进行分析。在MCP其他参数不变的条件下，通过调整MCP入射电子的能量和入射电子角度分布，优化了MCP最佳工作信噪比的工作条件，实现了优化MCP像增强器信噪比，提高了MCP像增强器的亮度增益。

In order to improve the luminance gain of microchannel plate image intensifier,an electron multiplier mechanism-microchannel plate (MCP) was used in low light level image intensifier. The noise mechanism in the MCP was analyzed. By adjusting the energy and angle distribution of the incident electrons at MCP and keeping other MCP parameters unchanged,the optimum operation conditions of MCP for best signal-to-noise ratio were found. The best signalto-noise ratio of the MCP image intensifier was achieved and the brightness gain of MCP image intensifier was improved.