期刊
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
卷 35, 期 4, 页码 382-411出版社
SPRINGER
DOI: 10.1007/s10762-014-0057-0
关键词
Tomography; Terahertz imaging; 3D reconstruction; Time of flight; Holography; Diffractive imaging; Synthetic aperture radar ( SAR); THz Computed tomography; Iterative method; BFP; Volume inspection; Non destructive testing; Sinogram; Millimeter waves; Far infrared; Spectro imaging; Reflection and transmission images
资金
- European community [N 266320]
- Agence Nationale de la Recherche (ANR)
Terahertz and millimeter waves penetrate various dielectric materials, including plastics, ceramics, crystals, and concrete, allowing terahertz transmission and reflection images to be considered as a new imaging tool complementary to X-Ray or Infrared. Terahertz imaging is a well-established technique in various laboratory and industrial applications. However, these images are often two-dimensional. Three-dimensional, transmission-mode imaging is limited to thin samples, due to the absorption of the sample accumulated in the propagation direction. A tomographic imaging procedure can be used to acquire and to render three-dimensional images in the terahertz frequency range, as in the optical, infrared or X-ray regions of the electromagnetic spectrum. In this paper, after a brief introduction to two dimensional millimeter waves and terahertz imaging we establish the principles of tomography for Terahertz Computed tomography (CT), tomosynthesis (TS), synthetic aperture radar (SAR) and time-of-flight (TOF) terahertz tomography. For each technique, we present advantages, drawbacks and limitations for imaging the internal structure of an object.
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