High spatial resolution shortwave infrared imaging technology based on time delay and digital accumulation method

doi:10.1016/j.infrared.2017.01.017

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	High spatial resolution shortwave infrared imaging technology based on time delay and digital accumulation method
	Jia JX; Wang YM; Zhuang XQ; Yao Y; Wang SW; Zhao D; Shu R; Wang JY
刊名	INFRARED PHYSICS & TECHNOLOGY
	2017
卷号	81 页码:305-312
关键词	DARK CURRENT
DOI	10.1016/j.infrared.2017.01.017
英文摘要	Shortwave infrared (SWIR) imaging technology attracts more and more attention by its fascinating ability of penetrating haze and smoke. For application of spaceborne remote sensing, spatial resolution of SWIR is lower compared with that of visible light (VIS) wavelength. It is difficult to balance between the spatial resolution and signal to noise ratio (SNR). Some conventional methods, such as enlarging aperture of telescope, image motion compensation, and analog time delay and integration (TDI) technology are used to gain SNR. These techniques bring in higher cost of satellite, complexity of system or other negative factors. In this paper, time delay and digital accumulation (TDDA) method is proposed to achieve higher spatial resolution. The method can enhance the SNR and non-uniformity of system theoretically. A prototype of SWIR imager consists of opto-mechanical, 1024 x 128 InGaAs detector, and electronics is designed and integrated to prove TDDA method. Both of measurements and experimental results indicate TDDA method can promote SNR of system approximated of the square root of accumulative stage. The results exhibit that non-uniformity of system is also improved by this approach to some extent. The experiment results are corresponded with the theoretical analysis. Based on the experiments results, it is proved firstly that the goal of 1 m ground sample distance (GSD) in orbit of 500 km is feasible with the TDDA stage of 30 for SWIR waveband (0.9-1.7 mu m). (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://202.127.2.71:8080/handle/181331/12285]
专题	上海技术物理研究所_上海技物所
作者单位	Shanghai Inst Tech Phys
推荐引用方式 GB/T 7714	Jia JX,Wang YM,Zhuang XQ,et al. High spatial resolution shortwave infrared imaging technology based on time delay and digital accumulation method[J]. INFRARED PHYSICS & TECHNOLOGY,2017,81:305-312.
APA	Jia JX.,Wang YM.,Zhuang XQ.,Yao Y.,Wang SW.,...&Wang JY.(2017).High spatial resolution shortwave infrared imaging technology based on time delay and digital accumulation method.INFRARED PHYSICS & TECHNOLOGY,81,305-312.
MLA	Jia JX,et al."High spatial resolution shortwave infrared imaging technology based on time delay and digital accumulation method".INFRARED PHYSICS & TECHNOLOGY 81(2017):305-312.