Jing YANG, Jie-Fu QIU, Hui JIANG, Min HU, Sheng-Gang LIU, Hui ZHANG. The application of terahertz technology in paintings[J]. Journal of Infrared and Millimeter Waves, 2022, 41(1): 2021234
- Journal of Infrared and Millimeter Waves
- Vol. 41, Issue 1, 2021234 (2022)
Fig. 1. Electromagnetic spectrum
Fig. 2. Experimental setup for terahertz time-domain spectroscopy
Fig. 3. Key reconstruction images：（a）unwrapped，（b）in a vinyl box，（c）in a foam rubber cardboard box［20］
Fig. 4. Cross section of the time domain imaging profile
Fig. 5. Terahertz spectra of azurite，malachite and verdigris［2］
Fig. 6. Terahertz spectra of different pigments［23］
Fig. 7. Electromagnetic wave penetrates the thickness of paintings
Fig. 8. Terahertz time domain imaging of leaves［41］
Fig. 9. （a）Gold coating detected by terahertz time domain imaging，（b）gypsum/canvas/gypsum structure，（c）wood floor and canvas textures reconstructed at different time delays and spatial resolutions［44］
Fig. 10. Image of a butterfly extracted between the gypsum layers（gypsum/graphite/gypsum）［34］
Fig. 11. Test panel with strokes of（a）umber covered with lead white，（b）cross-section THz map of the umber/lead white interface，（c）paint layer thickness［45］
Fig. 12. （a）Visible image of scanning region，（b）X-ray imaging of scanning region，（c）peak-peak time parameter terahertz image，（d）terahertz frequency integrated image，（e）terahertz image of 0.55-0.62THz，（f）false color imaging［47］
Fig. 13. （a）Terahertz transmission image of crack area，（b）terahertz time domain waveform of different selected points［51］
Fig. 14. Cross-section imaging of oil painting，（a）under terahertz B-SCAN，（b）OCT imaging at the same position，（c）terahertz imaging after algorithm combination［68］
Fig. 15. （a）LF Raman of red lead，（b）LF Raman of cinnabar，（c）LF Raman of proportional mixture of red lead and cinnabar［67］
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