脉冲展宽分幅变像管场曲特性研究  

Study on Field Curvature Characteristics of Pulse-Dilation Framing Tube

作　　者：雷云飞[1] 刘进元[1] 蔡厚智[1] 黄峻堃 王勇[1] 邓珀昆 Lei Yunfei;Liu Jinyuan;Cai Houzhi;Huang Junkun;Wang Yong;Deng Pokun(College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China)

机构地区：[1]深圳大学物理与光电工程学院,广东深圳518060

出　　处：《光学学报》2021年第21期235-241,共7页Acta Optica Sinica

基　　金：国家自然科学基金(11775147);中国博士后科学基金(2018M643183)。

摘　　要：介绍了一种脉冲展宽分幅变像管,并对其场曲特性和离轴空间分辨本领进行了分析。该分幅变像管采用多个短磁透镜将产生于阴极的电子图像成像于微通道板接收面。通过模拟仿真对透镜个数成像的场曲特性进行了研究,并通过实验进行了验证。仿真计算结果表明,采用多透镜可有效校正成像系统场曲,提高空间分辨率。当成像比例为1∶1时,在离轴30 mm处单透镜、双透镜、三透镜和四透镜成像面与高斯像面的轴向偏离分别为13 cm、4.7 cm、2.5 cm和1.7 cm。测试结果表明,采用四透镜成像系统的离轴调制度较单透镜提升了约40%。In this paper,a pulse-dilation framing tube is developed,and the field curvature characteristics and offaxis spatial resolution of this tube are analyzed.Multiple short magnetic lenses are used in this tube to image the photoelectrons from the cathode onto the receiving surface of the microchannel plate.The field curvature characteristics of lenses number imaging are studied by simulations and verified by experiments.The simulation results show that the field curvature of the imaging system can be reduced by multiple lenses and the spatial resolution is improved.When the imaging ratio is 1∶1,the axial deviations of simple lens,bilens,triplet lens,and four lenses from Gaussian image plane are 13 cm,4.7 cm,2.5 cm,and 1.7 cm,respectively.The experimental results show that the off-axis modulation of the four lenses system is 40%higher than that of the single lens.

关 键 词：超快光学 超快诊断 脉冲展宽 磁透镜 空间分辨率 场曲 

分 类 号：TN143[电子电信—物理电子学]