Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces
Abstract
:1. Introduction
2. Materials and Methods
2.1. Multi-Layered Samples and Original Frame Ornament
2.2. THz Imaging Setup
2.3. Fitting Procedure for Thickness Estimation
3. Results and Discussion
3.1. Cross-Section for Direct Thickness Measurement
3.2. THz Thickness Measurement
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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A4, A6 | A5 | B4, B6 | B5 | C4, C6 | C5 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | |
Gy1 | 426 ± 4% | 424 ± 4% | 425 ± 3% | 424 ± 4% | 798 ± 32% | 828 ± 4% | 798 ± 4% | 828 ± 4% | 1218 ± 3% | 1196 ± 3% | 1202 ± 4% | 1196 ± 3 |
Red Bole | - | 66 ± 23% | 67 ± 9% | 66 ± 23% | - | 49 ± 28% | 63 ± 5% | 49 ± 28% | - | 45 ± 40% | 63 ± 39% | 45 ± 40% |
Gy2 | - | 469 ± 7% | 499 ± 2% | 469 ± 7% | - | 370 ± 3% | 350 ± 16% | 370 ± 3% | - | 366 ± 9% | 342 ± 20% | 366 ± 9% |
A1, A3 | A2 | B1, B3 | B2 | C1, C3 | C2 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | |
Col-Eth | 54 ± 28% | 40 ± 12% | 55 ± 38% | 40 ± 12% | 70 ± 25% | 51 ± 18% | 60 ± 32% | 51 ± 18% | 69 ± 27% | 45 ± 35% | 67 ± 16% | 45 ± 35% |
Gy1 | 461 ± 19% | 397 ± 7% | 496 ± 9% | 397 ± 7% | 796 ± 9% | 728 ± 6% | 801 ± 12% | 728 ± 6% | 1129 ± 9% | 1115 ± 5% | 1138 ± 7% | 1115 ± 5% |
Red Bole | - | 150 ± 27% | 113 ± 35% | 150 ± 27% | - | 46 ± 9% | 77 ± 16% | 46 ± 9% | - | 73 ± 23% | 88 ± 38% | 73 ± 23% |
Gy2 | - | 384 ± 6% | 379 ± 21% | 384 ± 6% | - | 380 ± 7% | 408 ± 13% | 380 ± 7% | - | 372 ± 8% | 325 ± 28% | 372 ± 8% |
A7 | A8 | B7 | B8 | C7 | C8 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | |
She-Eth | 60 ± 30% | 52 ± 16% | 62 ± 24% | 52 ± 16% | 53 ± 33% | 46 ± 27% | 55 ± 37% | 46 ± 27% | 62 ± 24% | 75 ± 26% | 67 ± 28% | 75 ± 26% |
Gy1 | 449 ± 26% | 456 ± 8% | 496 ± 32% | 456 ± 8% | 1033 ± 33% | 920 ± 2% | 1020 ± 12% | 920 ± 2% | 1141 ± 19% | 1174 ± 4% | 1126 ± 13% | 1174 ± 4% |
Red Bole | 128 ± 31% | 84 ± 21% | - | 84 ± 21% | 94 ± 17% | 107 ± 34% | - | 107 ± 34% | 88 ± 18% | 43 ± 30% | - | 43 ± 30% |
Gy2 | 570 ± 22% | 498 ± 8% | - | 498 ± 8% | 287 ± 26% | 293 ± 8% | - | 293 ± 8% | 440 ± 30% | 368 ± 9% | - | 368 ± 9% |
A10, A12 | A11 | B10, B12 | B11 | C10, C12 | C11 | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | THz | Optical | |
Oil-San | 59 ± 32% | 59 ± 26% | 69 ± 16% | 59 ± 26% | 130 ± 39% | 105 ± 24% | 67 ± 37% | 105 ± 24% | 60 ± 22% | 89 ± 8% | 70 ± 15% | 89 ± 8% |
Gy1 | 553 ± 23% | 516 ± 8% | 574 ± 25% | 516 ± 8% | 628 ± 25% | 689 ± 5% | 657 ± 21% | 689 ± 5% | 1152 ± 18% | 1102 ± 8% | 1161 ± 6% | 1102 ± 8% |
Red Bole | 82 ± 20% | 86 ± 13% | -- | 86 ± 13% | 126 ± 32% | 89 ± 30% | -- | 89 ± 30% | 89 ± 17% | 58 ± 20% | -- | 58 ± 20% |
Gy2 | 491 ± 39% | 460 ± 6% | -- | 460 ± 6% | 439 ± 32% | 405 ± 15% | -- | 405 ± 15% | 504 ± 12% | 436 ± 6% | -- | 436 ± 6% |
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Cacciari, I.; Ciofini, D.; Baija, H.; Siano, S. Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces. Materials 2019, 12, 3822. https://doi.org/10.3390/ma12233822
Cacciari I, Ciofini D, Baija H, Siano S. Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces. Materials. 2019; 12(23):3822. https://doi.org/10.3390/ma12233822
Chicago/Turabian StyleCacciari, Ilaria, Daniele Ciofini, Hubert Baija, and Salvatore Siano. 2019. "Terahertz Time-Domain Reconstruction of Coating Microstratigraphy on Gilded Surfaces" Materials 12, no. 23: 3822. https://doi.org/10.3390/ma12233822