Infrared and Laser Engineering, Volume. 50, Issue 12, 20210717(2021)
Terahertz single-pixel computational imaging: Principles and applications(Invited)
Fig. 1. Light path design of transmission(a) and reflection(b) and mathematical description (c) of terahertz single-pixel imaging based on modulator
Fig. 2. Schematic of the experimental setup for terahertz time-domain spectroscopy system[46]. (a) The different colors correspond to different delay-line positions, these positions correspond to different time points in Fig.(b); (b) Measured THz time-domain signal; (c) The amplitude and phase of a signal in the frequency domain
Fig. 4. Schematic diagram of terahertz single-pixel imaging structure based on metasurface modulator[56]. (a) Spatial distributon of maximum differential absorption for Hadamard pattern; (b) Image reconstruction using 64 masks with each mask displayed for 22.4 ms, giving a total image acquisition time of 1.43 s; (c) Photograph of the object studied. (d) Consecutive tiles show reconstruction using 45 Hadamard masks
Fig. 5. (a) Schematic of terahertz single-pixel imaging system based on the passivated silicon wafer[63]; (b) Comparison of reconstruction results between conventional high-resistive silicon and passivated silicon
Fig. 7. Fourier single-pixel computational imaging for the terahertz regime [81]. (a)-(d) Fourier spectrums at different sampling rates; (e)-(h) Inverse Fourier transform terahertz image
Fig. 8. (a) Network architecture of deep convolutional auto-encoder[86]; (b) Design of part of optimized patterns; (c) Experimental structure and video of single-pixel imaging
Fig. 9. (a) DCAN architecture [87]; (b) Qualitative and quantitative evaluation of conventional FSI and based on deep learning FSI
Fig. 10. Principle schematic of terahertz single-pixel computational imaging system at standoff distances and far-field imaging results[92]
Fig. 12. Structural schematic of time-resolved nonlinear ghost imaging and hyperspectral reconstructed results[97]
Fig. 13. (a) Terahertz recognition experimental setup of target; (b) Perfor- mance evaluation (confusion matrices) of the object recognition method[100]
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Rongbin She, Yongle Zhu, Wenquan Liu, Yuanfu Lu, Guangyuan Li. Terahertz single-pixel computational imaging: Principles and applications(Invited)[J]. Infrared and Laser Engineering, 2021, 50(12): 20210717
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Received: Sep. 28, 2021
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Published Online: Feb. 9, 2022
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