超二代像增强器分辨力提高方法

Methods for Resolution Improvement of Super II Image Intensifier

为进一步提高超二代像增强器分辨力,分析了阴极输入窗、多碱光电阴极、微通道板、荧光屏等对超二代像增强器分辨力的影响,提出了减小阴极近贴距离、减小微通道板通道孔径、减小光纤面板输出窗丝径以及对微通道板镀制防电子弥散膜来提高分辨力的方法,并通过实验得到了验证。实验结果表明,随着阴极近贴距离的不断减小,分辨力可以得到逐步提高。阴极近贴距离为0.08mm的条件下,缩小光纤面板输出窗的丝径,缩小微通道板的孔径,且在微通道板的输出面镀制防电子弥散膜,可以使超二代像增强器的分辨力达到72 lp/mm,最高可达到76 lp/mm,比原有超二代像增强器的分辨力提高了33.33%。

To improve the resolution of the superⅡimage intensifier,factors such as the cathode input window,multialkali photocathode,microchannel plate(MCP),and phosphor screen were analyzed.The resolution was increased by reducing the cathode proximity distance,channel diameter of the MCP,and fiber size of the fiber optic faceplate and by depositing an anti-electronic dispersion film onto the output face of the MCP.These methods were verified experimentally.By continuously decreasing the cathode proximity distance continuously,the resolution can be gradually increased.On the condition that the cathode proximity distance is 0.08 mm,when the fiber size of the fiber optic faceplate and channel diameter of the MCP are reduced,with the deposition of a coated anti-electronic dispersion film on the output side of the MCP,a resolution of 72 lp/mm can be achieved,even reaching a maximum of 76 lp/mm.Thus,the resolution is improved by 33.33%.