本文在介绍近贴聚焦的基础上,指出一种用金(An)薄膜作为面电子源的双近贴聚焦紫外成象系统。给出实验样管、系统和某些实验结果,并就决定该系统象质的因素和改善象质的途径进行了必要的分析和讨论。最后,明确地指出Au薄膜光阴极的优点和该系统在象管模拟和MCP特性测试方面的应用。 Based on the introduction of near-in-focus, this paper points out a double close-in focused UV imaging system using gold (An) as the surface electron source. Experimental tubes, systems and some experimental results are given, and the necessary analysis and discussion are made on the factors that determine the image quality of the system and the ways to improve the image quality. Finally, the advantages of the Au thin-film photocathode and the application of the system in tube imaging and MCP testing are clearly pointed out.