光电工程, 2020, 47 (5): 190543, 网络出版: 2020-05-27   

连续太赫兹波数字全息相衬成像

Phase contrast imaging based on continuous-wave terahertz digital holography
作者单位
1 北京工业大学应用数理学院,北京 100124
2 北京工业大学应用数理学院,北京市精密测控技术与仪器工程技术研究中心,北京 100124
摘要
太赫兹波具有独特的低能性、高穿透性、惧水性等成像特性,将其应用于相衬成像能够反映物体的内部结构和更加丰富全面的生物信息,在生物医学检测等领域具有重要的应用。其中,太赫兹波数字全息成像是一种可以给出定量的振幅和相位信息的非接触、全场相衬成像方法,是太赫兹成像技术领域的重要研究方向之一。本文基于连续太赫兹源,从离轴式和同轴式数字全息成像的相衬成像原理、光路系统和再现算法多个方面,介绍了相关技术的研究现状,分析了太赫兹源、再现算法等因素对成像分辨率的影响,并对太赫兹数字全息的发展趋势进行了展望。
Abstract
Terahertz (THz) radiation, due to its unique propagation characters of low-energy, high-penetration, water-absorption, provides internal structure of objects and comprehensive biological information in phase contrast imaging. It has been applied in biomedical imaging, non-destructive testing, and other fields. As an important part of THz imaging technology, continuous-wave (CW) THz digital holography (TDH) is qualified as a non-invasive and whole-field phase contrast imaging method. In this paper, we review the development and status of off-axis and in-line TDH, including the recording and reconstruction theory, experimental setup, and reconstruction algorithms. The influence of existing THz sources and the reconstruction algorithms on resolution and fidelity of imaging are analyzed. And the development trend of TDH is prospected in the end.
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史晓玉, 王大勇, 戎路, 赵洁, 王云新. 连续太赫兹波数字全息相衬成像[J]. 光电工程, 2020, 47(5): 190543. Shi Xiaoyu, Wang Dayong, Rong Lu, Zhao Jie, Wang Yunxin. Phase contrast imaging based on continuous-wave terahertz digital holography[J]. Opto-Electronic Engineering, 2020, 47(5): 190543.

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