Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging
Abstract This study presents the two-dimensional (2D) image of a subsurface structure reconstructed using an imaging method based on the photothermal effect. The photothermal imaging method is based on the deflection method using two lasers: pump and probe lasers. A continuous scanning technique is...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Photonic Sensors |
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| Online Access: | https://doi.org/10.1007/s13320-025-0744-6 |
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| author | Moojoong Kim Hyunjung Kim |
| author_facet | Moojoong Kim Hyunjung Kim |
| author_sort | Moojoong Kim |
| collection | DOAJ |
| description | Abstract This study presents the two-dimensional (2D) image of a subsurface structure reconstructed using an imaging method based on the photothermal effect. The photothermal imaging method is based on the deflection method using two lasers: pump and probe lasers. A continuous scanning technique is proposed for 2D (x- and y-directions) surface scanning. The continuous scanning method is compared with the conventional point-by-point scanning technique, and a low-pass fast Fourier transform filter and a Marr-Hildreth detector are found to produce significant results. The photothermal imaging method with continuous 2D surface scanning is performed on three copper-resin double-layer samples with different subsurface structures. The subsurface structures of the copper-resin double-layer samples comprise a square block of 5×5 mm2 area and blocks shaped as the alphabet letters “T” and “F”. The letters are 3 mm wide and 10×13 mm2 in area. All three shapes are 1 mm thick and located at a depth of 0.5 mm from the surface of the copper block. The reconstructed photothermal images show an absolute error within 0.122 mm compared with the actual subsurface structure, equivalent to a 2.3% relative error. |
| format | Article |
| id | doaj-art-b95e16e67b1942809dbcf3a2ea1c8f68 |
| institution | Kabale University |
| issn | 1674-9251 2190-7439 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Photonic Sensors |
| spelling | doaj-art-b95e16e67b1942809dbcf3a2ea1c8f682025-01-26T12:21:19ZengSpringerOpenPhotonic Sensors1674-92512190-74392025-01-0115211210.1007/s13320-025-0744-6Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal ImagingMoojoong Kim0Hyunjung Kim1Research Institute for Science and Engineering, Waseda UniversityDepartment of Mechanical Engineering, Ajou UniversityAbstract This study presents the two-dimensional (2D) image of a subsurface structure reconstructed using an imaging method based on the photothermal effect. The photothermal imaging method is based on the deflection method using two lasers: pump and probe lasers. A continuous scanning technique is proposed for 2D (x- and y-directions) surface scanning. The continuous scanning method is compared with the conventional point-by-point scanning technique, and a low-pass fast Fourier transform filter and a Marr-Hildreth detector are found to produce significant results. The photothermal imaging method with continuous 2D surface scanning is performed on three copper-resin double-layer samples with different subsurface structures. The subsurface structures of the copper-resin double-layer samples comprise a square block of 5×5 mm2 area and blocks shaped as the alphabet letters “T” and “F”. The letters are 3 mm wide and 10×13 mm2 in area. All three shapes are 1 mm thick and located at a depth of 0.5 mm from the surface of the copper block. The reconstructed photothermal images show an absolute error within 0.122 mm compared with the actual subsurface structure, equivalent to a 2.3% relative error.https://doi.org/10.1007/s13320-025-0744-6Photothermal effectphotothermal imagingnondestructive testreconstructionvisualizationtomography |
| spellingShingle | Moojoong Kim Hyunjung Kim Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging Photonic Sensors Photothermal effect photothermal imaging nondestructive test reconstruction visualization tomography |
| title | Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging |
| title_full | Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging |
| title_fullStr | Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging |
| title_full_unstemmed | Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging |
| title_short | Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging |
| title_sort | two dimensional reconstructed image of a subsurface structure using continuous scanned photothermal imaging |
| topic | Photothermal effect photothermal imaging nondestructive test reconstruction visualization tomography |
| url | https://doi.org/10.1007/s13320-025-0744-6 |
| work_keys_str_mv | AT moojoongkim twodimensionalreconstructedimageofasubsurfacestructureusingcontinuousscannedphotothermalimaging AT hyunjungkim twodimensionalreconstructedimageofasubsurfacestructureusingcontinuousscannedphotothermalimaging |