Study of Terahertz Amplitude Imaging Based on the Mean Absorption
Zhang, ZY; Ji, T; Xiao, TQ; Zhao, HW; Chen, M; Yu, XH; Tong, YJ; Zhu, HC; Peng, WW; Chen, M (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
2015
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
卷号35期号:12页码:3315—3318
文章类型期刊文献
摘要A new method of terahertz (THz) imaging based on the mean absorption is proposed. Terahertz radiation is an electromagnetic radiation in the range between millimeter waves and far infrared. THz pulse imaging emerges as a novel tool in many fields because of its low energy and non-ionizing character, such as material, chemical, biological medicine and food safety. A character of THz imaging technique is it can get large amount of information. How to extract the useful parameter from the large amount of information and reconstruct sample's image is a key technology in THz imaging. Some efforts have been done for advanced visualization methods to extract the information of interest from the raw data. Both time domain and frequency domain visualization methods can be applied to extract information on the physical properties of samples from THz imaging raw data. The process of extracting useful parameter from raw data of the new method based on the mean absorption was given in this article. This method relates to the sample absorption and thickness, it delivers good signal to noise ratio in the images, and the dispersion effects are cancelled. A paper with a "THz" shape hole was taken as the sample to do the experiment. Traditional THz amplitude imaging methods in time domain and frequency domain are used to achieve the sample's image, such as relative reduction of pulse maximum imaging method, relative power loss imaging method, and relative power loss at specific frequency imaging method. The sample's information that reflected by these methods and the characteristics of these methods are discussed. The method base on the mean absorption within a certain frequency is also used to reconstruct sample's image. The experimental results show that this new method can well reflect the true information of the sample. And it can achieve a clearer image than the other traditional THz amplitude imaging methods. All the experimental results and theoretical analyses indicate that the method base on the mean absorption within a certain frequency can reflects sample absorb and thickness information, it can achieve good signal to noise ratio in the images. Because the absorption is mean absorption within in a certain frequency, so the method proposed in this article is especially suitable for samples with simple structure. And this new method can be a useful added tool for the other traditional THz amplitude imaging methods.
关键词Spectroscopy Tomography
语种英语
WOS记录号WOS:000366542800008
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25053
专题中科院上海应用物理研究所2011-2018年
通讯作者Chen, M (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
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GB/T 7714
Zhang, ZY,Ji, T,Xiao, TQ,et al. Study of Terahertz Amplitude Imaging Based on the Mean Absorption[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2015,35(12):3315—3318.
APA Zhang, ZY.,Ji, T.,Xiao, TQ.,Zhao, HW.,Chen, M.,...&Chen, M .(2015).Study of Terahertz Amplitude Imaging Based on the Mean Absorption.SPECTROSCOPY AND SPECTRAL ANALYSIS,35(12),3315—3318.
MLA Zhang, ZY,et al."Study of Terahertz Amplitude Imaging Based on the Mean Absorption".SPECTROSCOPY AND SPECTRAL ANALYSIS 35.12(2015):3315—3318.
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