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Single-Shot Direct Transmission Terahertz Imaging Based on Intense Broadband Terahertz Radiation.

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  • معلومة اضافية
    • المصدر:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101204366 Publication Model: Electronic Cited Medium: Internet ISSN: 1424-8220 (Electronic) Linking ISSN: 14248220 NLM ISO Abbreviation: Sensors (Basel) Subsets: PubMed not MEDLINE; MEDLINE
    • بيانات النشر:
      Original Publication: Basel, Switzerland : MDPI, c2000-
    • نبذة مختصرة :
      There are numerous applications of terahertz (THz) imaging in many fields. However, current THz imaging is generally based on scanning technique due to the limited intensity of the THz sources. Thus, it takes a long time to obtain a frame image of the target and cannot meet the requirement of fast THz imaging. Here, we demonstrate a single-shot direct THz imaging strategy based on a broadband intense THz source with a frequency range of 0.1~23 THz and a THz camera with a frequency response range of 1~7 THz. This THz source was generated from the laser-plasma interaction, with its central frequency at ~12 THz. The frame rate of this imaging system was 8.5 frames per second. The imaging resolution reached 146.2 μm. With this imaging system, a single-shot THz image for a target object with a size of more than 7 cm was routinely obtained, showing a potential application for fast THz imaging. Furthermore, we proposed and tested an image enhancement algorithm based on an improved dark channel prior (DCP) theory and multi-scale retinex (MSR) theory to optimize the image brightness, contrast, entropy and peak signal-to-noise ratio (PSNR).
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    • Grant Information:
      No. 2017YFA0701000 National Key Research and Development Program of China; No. U2030119 National Natural Science Foundation of China - Chinese Academy of Engineering Physics NSAF Joint Fund
    • Contributed Indexing:
      Keywords: THz transmission imaging; fast THz imaging; intense broadband THz radiation; multi-scale retinex
    • الموضوع:
      Date Created: 20240713 Latest Revision: 20240715
    • الموضوع:
      20240715
    • الرقم المعرف:
      PMC11243891
    • الرقم المعرف:
      10.3390/s24134160
    • الرقم المعرف:
      39000939