Measurement of Surface Roughness of Painted & Unpainted Metallic Objects using a THz Profilometer.
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| Title: | Measurement of Surface Roughness of Painted & Unpainted Metallic Objects using a THz Profilometer. |
|---|---|
| Authors: | Ghorui, Chandan1 (AUTHOR), Periketi, Naveen1 (AUTHOR), Chaudhary, A. K.1 (AUTHOR) akcphys@gmail.com |
| Source: | Journal of Infrared, Millimeter & Terahertz Waves. Jun2026, Vol. 47 Issue 6, p1-14. 14p. |
| Subjects: | Surface roughness, Profilometer, Metallic surfaces, Surface topography measurement, Reflectance, Submillimeter waves, Optical reflection measurement |
| Abstract: | This paper reports the design aspects of 3D profilometer in terahertz (THz) frequency domain in reflection geometry employed for surface roughness measurements of painted and unpainted metallic objects. We also discuss the selection of correct combination of incident angle and frequency-based modalities for getting best results in terms of signal strength from coated and underneath rusted surfaces at discrete terahertz frequencies. The study focuses on the surface scattering properties, which directly affects the quality and strength of the reflected THz signal. The signal was recorded at frequencies of f = 0.5, 1.0, 1.5 and 2.0 THz, respectively. The measured 3D surface roughness profiles of old painted and unpainted metallic objects ranged from 15–100 μm range for the given THz frequency range. It was observed that the values of reflection coefficient decreased with increasing surface roughness in the 10–20 μm range Furthermore ,frequencies between 0.5and 1.5 THz range exhibited the highest reflection coefficient for surface roughness values below 50 μm. However, the reflected signal at 2.0 THz frequency shows experimental decay up to 120 μm range. The study was focused on the recording of 3D surface roughness profile and reveal that the exponential decay behavior of the reflected signal can be extended for highly rough surfaces by increasing the angle of incidence at lower frequency. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Infrared, Millimeter & Terahertz Waves is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193858650 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Measurement of Surface Roughness of Painted & Unpainted Metallic Objects using a THz Profilometer. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ghorui%2C+Chandan%22">Ghorui, Chandan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Periketi%2C+Naveen%22">Periketi, Naveen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chaudhary%2C+A%2E+K%2E%22">Chaudhary, A. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> akcphys@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Infrared%2C+Millimeter+%26+Terahertz+Waves%22">Journal of Infrared, Millimeter & Terahertz Waves</searchLink>. Jun2026, Vol. 47 Issue 6, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Surface+roughness%22">Surface roughness</searchLink><br /><searchLink fieldCode="DE" term="%22Profilometer%22">Profilometer</searchLink><br /><searchLink fieldCode="DE" term="%22Metallic+surfaces%22">Metallic surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+topography+measurement%22">Surface topography measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Reflectance%22">Reflectance</searchLink><br /><searchLink fieldCode="DE" term="%22Submillimeter+waves%22">Submillimeter waves</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+reflection+measurement%22">Optical reflection measurement</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This paper reports the design aspects of 3D profilometer in terahertz (THz) frequency domain in reflection geometry employed for surface roughness measurements of painted and unpainted metallic objects. We also discuss the selection of correct combination of incident angle and frequency-based modalities for getting best results in terms of signal strength from coated and underneath rusted surfaces at discrete terahertz frequencies. The study focuses on the surface scattering properties, which directly affects the quality and strength of the reflected THz signal. The signal was recorded at frequencies of f = 0.5, 1.0, 1.5 and 2.0 THz, respectively. The measured 3D surface roughness profiles of old painted and unpainted metallic objects ranged from 15–100 μm range for the given THz frequency range. It was observed that the values of reflection coefficient decreased with increasing surface roughness in the 10–20 μm range Furthermore ,frequencies between 0.5and 1.5 THz range exhibited the highest reflection coefficient for surface roughness values below 50 μm. However, the reflected signal at 2.0 THz frequency shows experimental decay up to 120 μm range. The study was focused on the recording of 3D surface roughness profile and reveal that the exponential decay behavior of the reflected signal can be extended for highly rough surfaces by increasing the angle of incidence at lower frequency. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Infrared, Millimeter & Terahertz Waves is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s10762-026-01142-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: Surface roughness Type: general – SubjectFull: Profilometer Type: general – SubjectFull: Metallic surfaces Type: general – SubjectFull: Surface topography measurement Type: general – SubjectFull: Reflectance Type: general – SubjectFull: Submillimeter waves Type: general – SubjectFull: Optical reflection measurement Type: general Titles: – TitleFull: Measurement of Surface Roughness of Painted & Unpainted Metallic Objects using a THz Profilometer. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ghorui, Chandan – PersonEntity: Name: NameFull: Periketi, Naveen – PersonEntity: Name: NameFull: Chaudhary, A. K. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 18666892 Numbering: – Type: volume Value: 47 – Type: issue Value: 6 Titles: – TitleFull: Journal of Infrared, Millimeter & Terahertz Waves Type: main |
| ResultId | 1 |
