Changchun Institute of Optics,Fine Mechanics and Physics,CAS
Analysis and reduction of the TDI CCD charge transfer image shift | |
Li, Y. H.; X. D. Wang; W. G. Liu and Z. Wang | |
2017 | |
发表期刊 | Applied Optics
![]() |
卷号 | 56期号:33 |
摘要 | Based on the description of the charge transfer process of a time delay integration charge coupled device (TDI CCD), it is pointed out that the relative displacement of the target image and the transferred charge introduces the charge transfer image shift problem in a line transfer period, which leads to the decrease of the modulation transfer function (MTF) in the scanning direction. Based on the basic definition of MTF, the charge transfer image shift model of the TDI CCD is established. According to the quantitative calculation of this model, the MTF curves of the three-phase TDI CCD are obtained under the condition of different pulse widths of computer interface (CI) signals. The MTF changes with the pulse width of CI signals, and the maximum value at the spatial Nyquist frequency is obtained when the CI signals are equally spaced, which is difficult to achieve in the actual system because of the limitation of computed radiography readout signals. In this paper, we present the improved TDI CCD driving timing, which makes it possible to realize the equal interval distribution of CI signals by adjusting the technology compatibility kit signal. Finally, the experimental platform is built, and the MTF curves are calculated from the obtained target images. The result is consistent with the theoretical model. (C) 2017 Optical Society of America |
收录类别 | sci ; ei |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/59032 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Li, Y. H.,X. D. Wang,W. G. Liu and Z. Wang. Analysis and reduction of the TDI CCD charge transfer image shift[J]. Applied Optics,2017,56(33). |
APA | Li, Y. H.,X. D. Wang,&W. G. Liu and Z. Wang.(2017).Analysis and reduction of the TDI CCD charge transfer image shift.Applied Optics,56(33). |
MLA | Li, Y. H.,et al."Analysis and reduction of the TDI CCD charge transfer image shift".Applied Optics 56.33(2017). |
条目包含的文件 | 下载所有文件 | |||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Analysis and reducti(1517KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论