Synthetic aperture imaging with pulsed terahertz waves and its application in three-dimensional modeling of complex structures

IF 2 3区 物理与天体物理 Q3 OPTICS
Yuanhao Du, Hui Feng, Shuai Wu
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Abstract

In this study, we report a three-dimensional synthetic aperture imaging system realized by a terahertz time-domain spectrometer. The temporal waveforms of the terahertz pulses scattered by the object to be imaged are Fourier transformed to the frequency domain before image reconstruction by the back-projection algorithm. The resolution of the imaging system is close to the center wavelength of the terahertz pulses, as tested by a resolution test chart. We also demonstrate the ability of this imaging method in non-destructive evaluation applications by measuring the internal structures of a university badge. A three-dimensional terahertz image and a series of slice views of the badge are acquired. The terahertz images clearly show the surface shape and internal structures of the badge, and the logo of the university on the badge is successfully extracted from the three-dimensional terahertz image.

Abstract Image

脉冲太赫兹波合成孔径成像及其在复杂结构三维建模中的应用
在这项研究中,我们报告了一个由太赫兹时域光谱仪实现的三维合成孔径成像系统。被成像物体散射的太赫兹脉冲的时域波形被傅里叶变换到频域,然后通过反投影算法重建图像。经分辨率测试图测试,成像系统的分辨率接近太赫兹脉冲的中心波长。我们还通过测量大学徽章的内部结构,证明了这种成像方法在非破坏性评估应用中的能力。我们获得了徽章的三维太赫兹图像和一系列切片视图。太赫兹图像清晰地显示了徽章的表面形状和内部结构,并成功地从三维太赫兹图像中提取了徽章上的校徽。
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来源期刊
Applied Physics B
Applied Physics B 物理-光学
CiteScore
4.00
自引率
4.80%
发文量
202
审稿时长
3.0 months
期刊介绍: Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.
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