Three-dimensional terahertz-wave holographic imaging based on mixed-domain reconstruction algorithm

Gu Shengming; Li Chao; Gao Xiang; Sun Zhaoyang; Fang Guangyou

doi:10.3788/HPLPB20132506.1545

Volume 25 Issue 06

Apr. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(06): 1545-1548

Jiang Ge, Yang Chen, Zhou Xiaoqing, et al. Application of radar signal processing in terahertz imaging[J]. High Power Laser and Particle Beams, 2013, 25: 1555-1560. doi: 10.3788/HPLPB20132506.1555

Citation:

Gu Shengming, Li Chao, Gao Xiang, et al. Three-dimensional terahertz-wave holographic imaging based on mixed-domain reconstruction algorithm[J]. High Power Laser and Particle Beams, 2013, 25: 1545-1548. doi: 10.3788/HPLPB20132506.1545

Jiang Ge, Yang Chen, Zhou Xiaoqing, et al. Application of radar signal processing in terahertz imaging[J]. High Power Laser and Particle Beams, 2013, 25: 1555-1560. doi: 10.3788/HPLPB20132506.1555

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Three-dimensional terahertz-wave holographic imaging based on mixed-domain reconstruction algorithm

doi: 10.3788/HPLPB20132506.1545

Gu Shengming^{1,2,3
,
,},
Li Chao^1,2,
Gao Xiang^1,2,
Sun Zhaoyang^1,2,3,
Fang Guangyou^1,2

1.
Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China; 2.Key Laboratory of Electromagnetic Radiation and Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China; 3.University of Chinese Academy of Science,Beijing 100190,China

Received Date: 2012-12-07
Rev Recd Date: 2012-12-26
Publish Date: 2013-04-08

Abstract

Abstract

A three-dimensional (3-D) image reconstruction algorithm based on mixed-domain is developed for terahertz holographic imager. Matched filtering in the spatial wave-number domain is employed to focus images in the vertical direction. Combined with back-projection technique used in the other two directions, the algorithm can focus images perfectly without complex 3-D Stolt interpolation computation compared with the frequency-wavenumber algorithm. Besides, motion compensations in the horizontal and range directions get easier to handle. The computational cost of the proposed algorithm is lower than the traditional 3-D back-projection algorithm owing to the FFT-based reconstruction in the vertical direction. Finally, some simulation and experimental imaging results are given in the 0.2 THz band to validate the algorithm.
- mixed-domain algorithm,
- back-projection,
- holographic imaging,
- three-dimensional imaging,
- terahertz imaging

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