Liu Yande, Xu Zhen, Hu Jun, Li Maopeng. Research on Quality of Agricultural Products by Terahertz Spectroscopy[J]. Laser & Optoelectronics Progress, 2021, 58(1): 100005
- Laser & Optoelectronics Progress
- Vol. 58, Issue 1, 100005 (2021)
Fig. 1. Terahertz band of electromagnetic waves
Fig. 2. Schematic of terahertz time-domain spectral system
Fig. 3. Photo of TAS7500SU terahertz time-domain spectral system
Fig. 4. Groundnut kernel with different degrees of mildew[15]. （a）Normal groundnut kernel; (b) groundnut kernel with mild mildew; (c) groundnut kernel with moderate mildew; (d) groundnut kernel with severe mildew
Fig. 5. Experimental and theoretically calculated absorption efficient of chlorodifon and dipterex[25]. (a) Chlorodifon; (b) dipterex
Fig. 6. Fitted curve between predicted and actual alum contents in flour[41]
Fig. 7. THz absorption spectra of transgenic and non-transgenic cotton seeds at low frequency and high frequency bands[49]. (a) 0.3?0.9 THz band; (b) 0.9?1.2 THz band
Fig. 8. Average terahertz time-domain spectra of soybean leaves under different drought stress gradients[58]
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Table 1. Comparison of experimental results of adulteration of potato powders[16]
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Table 2. Prediction results of LS-SVM model used for detecting benzoic acid content in corn flour[45]
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