基于一代像增强器的高分辨率X射线相机  

High-resolution X-ray CCD camera based on the first generation image intensifier

作　　者：刘术林[1,2] 杨露萍[3] 董煜晖 黄明举[3] 苏德坦[4] 闫保军 温凯乐 祁辉荣[1,2] 杨玉真[5] 余洋[6] 

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]核探测与核电子学国家重点实验室,北京100049 [3]河南大学物理与电子学院,河南开封475004 [4]北方夜视技术股份有限公司,云南昆明650217 [5]南京大学物理学院,江苏南京210023 [6]西安理工大学理学院应用物理系,陕西西安710048

出　　处：《应用光学》2017年第5期810-814,共5页Journal of Applied Optics

基　　金：中国科学院引进国内优秀人才基金(291013312D11175)

摘　　要：为了实现在较低剂量下获得较高的分辨率,研制了一款价格低廉的X射线CCD相机。该相机使用硫氧化钆作为转换屏、经一代像增强器增强后的图像通过光锥耦合到CCD相机上;为了提高系统的光传输效率,提出了将像增强器输出直面板或倒像器直接更换成光锥,其小端直接同CCD相机耦合的方案;通过灰度分析计算对比度曲线,拟合得出系统的本征空间分辨率为13Lp/mm;通过拍摄实际景物,可以清晰地看到其内部的细节,显示出比较好的图像质量。In order to achieve a higher resolution at lower X-ray doses,a low-cost X-ray CCD cam-era is developed. The camera uses gadolinium sulfuric acid as a conversion screen, and images enhanced by the first generation image intensifier is coupled to CCD camera through fiber optical taper. In order to improve optical transmission efficiency of the system,a scheme is proposed in which output of image intensifier is directly replaced with fiber optical taper,and its small end is directly coupled with CCD camera. The contrast ratio curve is calculated by gray analysis, and the intrinsic spatial resolution of the system is fitted with 13 Lp/mm. By shooting the actual scene, internal details can be clearly observed, showing a better image quality.

关 键 词：微光像增强器 X射线相机 灰度分析 分辨率 耦合 CCD相机 

分 类 号：TN223[电子电信—物理电子学] TL816.1[核科学技术—核技术及应用]