Lichuan Luo, Hu Deng, Quancheng Liu, Linyu Chen, Zhanfeng Li. Ammonium Perchlorate Water Content Prediction Models Based on Terahertz Time-Domain Spectroscopy[J]. Acta Optica Sinica, 2021, 41(11): 1130001
- Acta Optica Sinica
- Vol. 41, Issue 11, 1130001 (2021)
Fig. 1. PTFE sample cell and its stainless steel fixture
Fig. 2. Schematic of optical path for THz-TDS
Fig. 3. Equivalent model based on effective medium theory
Fig. 4. Measurement results for first group of samples. (a) Time domain spectra; (b) absorption spectra; (c) refractive index spectra
Fig. 5. Measurement results for second group of samples. (a) Time domain spectra; (b) absorption spectra; (c) refractive index spectra
Fig. 6. Relationship between measured water content in first group of samples and optical parameters. (a) Absorption coefficient; (b) refractive index; (c) enlarged image of partial absorption coefficient; (d) enlarged image of partial refractive index
Fig. 7. Relationship between measured water content in second group of samples and optical parameters. (a) Absorption coefficient; (b) refractive index; (c) enlarged image of partial absorption coefficient; (d) enlarged image of partial refractive index
Fig. 8. Prediction results of three prediction models. (a) Prediction model based on absorption coefficient; prediction model based on refractive index; (c) new prediction model
Fig. 9. Measurement and prediction results for first group of samples. (a) Prediction model based on absorption coefficient; (b) prediction model based on refractive index; (c) new prediction model
Fig. 10. Measurement and prediction results for second group of samples. (a) Prediction model based on absorption coefficient; (b) prediction model based on refractive index; (c) new prediction model
Fig. 11. Measurement and prediction results for different group of samples. (a) Prediction model based on absorption coefficient; (b) prediction model based on refractive index; (c) new prediction model
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