在微通道板输出端镀制一层逸出功更高的金属膜以覆盖原有的镍铬电极，从而减小微通道板输出电子的动能以及在荧光屏上的弥散，提高微通道板的分辨力.实验结果表明，在微通道板的输出端镀制一层20 nm厚的银层（逸出功为4.3 eV）后，微光像增强器的分辨力从60 lp/mm提高到64 lp/mm，提高了6.6%；而镀制一层20 nm厚的铂层（逸出功为6.4 eV）后，超二代像增强器的分辨力从60 lp/mm提高到68 lp/mm，提高13%.在分辨力提高的同时，微通道板的增益会下降，镀银和镀铂后的微通道板，增益分别下降到原有值的74%和33%.金属膜的逸出功越高，分辨力提高的百分比越高，增益下降的百分比也越高.所以采用该方法来提高微通道板分辨力时，需要采用高增益的微通道板，从而使微通道板的增益下降以后仍能满足使用要求.

A metal film with higher work function is deposited at the output electrode of the microchannel plate to cover the original nickel-chromium electrode, which further reduces the kinetic energy of the output electrons of the microchannel plate and the dispersion of output electrons on the phosphor screen, thus improving the resolution of the microchannel plate. The experiment results show that the resolution of the image intensifier increases by 6.6% from 60 lp/mm to 64 lp/mm when a 20 nm thick silver layer with work function of 4.3 eV is deposited on the output electrode of the microchannel plate, while the resolution of the image intensifier increases by 13% from 60 lp/mm to 68 lp/mm when a 20 nm thick platinum layer with work function of 6.4 eV is deposited on the output electrode of the microchannel plate. At the same time, the gain of microchannel plate decreases. For silver plated microchannel plate and platinum plated microchannel plate, the gain decreases to 74% and 33% of the original value respectively. The higher the work function of metal film, the higher the percentage of resolution improvement, and the higher the percentage of gain decreases. Therefore, when the proposed method is used to improve the resolution of microchannel plate, it is necessary to use the microchannel plate with higher gain, so as to make up the influence caused by the decrease of microchannel plate gain.