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  • Chinese Optics Letters
  • Vol. 21,
  • Issue 6,
  • pp. 061102-
  • (2023)

Simulation for embedded-defects foam terahertz images of active bifocal terahertz imaging system at 0.22 THz based on geometric optics

Hui Wang, Deliang Zhou, Yan Wang, Runfeng Su, Shaohe Li, Xuecou Tu, Xiaoqing Jia, Lin Kang, Biaobing Jin, Huabing Wang, Jian Chen, and Peiheng Wu

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Abstract

We simulate the measurements of an active bifocal terahertz imaging system to reproduce the ability of the system to detect the internal structure of foams having embedded defects. Angular spectrum theory and geometric optics tracing are used to calculate the incident and received electric fields of the system and the scattered light distribution of the measured object. The finite-element method is also used to calculate the scattering light distribution of the measured object for comparison with the geometric optics model. The simulations are consistent with the measurements at the central axis of the horizontal stripe defects.

© 2023 Chinese Laser Press

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