Design of a Low Noise Area Array CCD Imaging System for Exoplanet Search | |
Di, Lamei1,5; Liu, Hong1,2,3,5; Wei, Ruyi1,5; Qiao, Nianzu4; Chen, Shasha1,3,5 | |
刊名 | JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY |
2020-05 | |
卷号 | 64期号:3 |
ISSN号 | 1062-3701;1943-3522 |
DOI | 10.2352/J.ImagingSci.Technol.2020.64.3.030504 |
产权排序 | 1 |
英文摘要 | The search for exoplanets is a focal topic in astronomy. Since the signal from the detected target is very weak, the imaging system needs to have ultra-low readout noise. Therefore, a low noise charge-coupled diode (CCD) imaging system for exoplanet search (LNCIS) is proposed. Based on the area array CCD (TH7888A), the circuit and timing drive of LNCIS are designed. Especially, the application of correlation dual sampling (CDS) and asynchronous first-in, first-out (FIFO) memory can effectively suppress the correlation noise of the image signal. Moreover, this article proposes a fully differential double correlation sampling method, which can achieve better sampling effect and can better eliminate common-mode noise, improve dynamic range, and achieve high-quality image signal output. In addition, an independent counting method for adjusting the exposure time is proposed, which satisfies the requirements of the long exposure time of the imaging system, so that the CCD can be provided an independent and adjustable exposure time in the photosensitive stage. The LNCIS uses the FPGA (ZYNQ7000) as the core control device to produce the timing according to the function of the system. Finally, the experimental results show that the real-time image acquisition is achieved under the condition that the CCD readout clock frequency is 20 MHz. It is verified that the circuit and timing drive of the imaging system can meet the design requirements. (C) 2020 Society for Imaging Science and Technology. |
语种 | 英语 |
出版者 | I S & T-SOC IMAGING SCIENCE TECHNOLOGY |
WOS记录号 | WOS:000549338700006 |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/93605] |
专题 | 西安光学精密机械研究所_光学影像学习与分析中心 |
通讯作者 | Wei, Ruyi |
作者单位 | 1.Chinese Acad Sci, Xian Inst Opt Precis Mechan, Xian 710119, Peoples R China 2.Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Northwest Univ, Sch Informat Sci & Technol, 1 Xuefu Ave, Xian 710127, Peoples R China 5.Chinese Acad Sci, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China |
推荐引用方式 GB/T 7714 | Di, Lamei,Liu, Hong,Wei, Ruyi,et al. Design of a Low Noise Area Array CCD Imaging System for Exoplanet Search[J]. JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY,2020,64(3). |
APA | Di, Lamei,Liu, Hong,Wei, Ruyi,Qiao, Nianzu,&Chen, Shasha.(2020).Design of a Low Noise Area Array CCD Imaging System for Exoplanet Search.JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY,64(3). |
MLA | Di, Lamei,et al."Design of a Low Noise Area Array CCD Imaging System for Exoplanet Search".JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY 64.3(2020). |
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