Surface roughness measurement of additive manufactured samples using angular speckle correlation
A speckle pattern is a direct fingerprint of surface height variation on the sample. In this paper, angular speckle correlation technique is applied to estimate surface roughness Ra of an additive manufactured sample with different surface roughness Ra values varying from 5μm to 20μm. Feasibility st...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/105708 http://hdl.handle.net/10220/49562 |
| _version_ | 1811682228974911488 |
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| author | Dev, Kapil A. S., Guru Prasad H, Aswin P, Prabhathan Chan, Kelvin H. K. Matham, Murukeshan Vadakke |
| author2 | Asundi, Anand K. |
| author_facet | Asundi, Anand K. Dev, Kapil A. S., Guru Prasad H, Aswin P, Prabhathan Chan, Kelvin H. K. Matham, Murukeshan Vadakke |
| author_sort | Dev, Kapil |
| collection | NTU |
| description | A speckle pattern is a direct fingerprint of surface height variation on the sample. In this paper, angular speckle correlation technique is applied to estimate surface roughness Ra of an additive manufactured sample with different surface roughness Ra values varying from 5μm to 20μm. Feasibility study is conducted to evaluate the correct incidence and the change in incidence angle for angular speckle correlation. Speckle correlation is computed from two speckle images that are recorded at two different incidence angles on the rough surface and surface roughness information is gleaned. Test results in terms of surface roughness measurement from standard calibration plate and additive layer manufactured samples are presented. |
| first_indexed | 2024-10-01T03:53:31Z |
| format | Journal Article |
| id | ntu-10356/105708 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:53:31Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1057082023-03-04T17:20:27Z Surface roughness measurement of additive manufactured samples using angular speckle correlation Dev, Kapil A. S., Guru Prasad H, Aswin P, Prabhathan Chan, Kelvin H. K. Matham, Murukeshan Vadakke Asundi, Anand K. School of Mechanical and Aerospace Engineering Fifth International Conference on Optical and Photonics Engineering Rolls-Royce@NTU Corporate Laboratory Additive Manufacturing Angular Speckle Correlation Engineering::Mechanical engineering A speckle pattern is a direct fingerprint of surface height variation on the sample. In this paper, angular speckle correlation technique is applied to estimate surface roughness Ra of an additive manufactured sample with different surface roughness Ra values varying from 5μm to 20μm. Feasibility study is conducted to evaluate the correct incidence and the change in incidence angle for angular speckle correlation. Speckle correlation is computed from two speckle images that are recorded at two different incidence angles on the rough surface and surface roughness information is gleaned. Test results in terms of surface roughness measurement from standard calibration plate and additive layer manufactured samples are presented. NRF (Natl Research Foundation, S’pore) Published version 2019-08-06T08:28:53Z 2019-12-06T21:56:17Z 2019-08-06T08:28:53Z 2019-12-06T21:56:17Z 2017 Journal Article Dev, K., A. S., Guru Prasad, H, Aswin., P, Prabhathan., Chan, K. H. K., & Matham, M. V. (2017). Surface roughness measurement of additive manufactured samples using angular speckle correlation. Proceedings of SPIE - Fifth International Conference on Optical and Photonics Engineering, 10449, 104492W. doi:10.1117/12.2270900 https://hdl.handle.net/10356/105708 http://hdl.handle.net/10220/49562 10.1117/12.2270900 en Proceedings of SPIE - Fifth International Conference on Optical and Photonics Engineering © 2017 SPIE. All rights reserved. This paper was published in Proceedings of SPIE - Fifth International Conference on Optical and Photonics Engineering and is made available with permission of SPIE. 8 p. application/pdf |
| spellingShingle | Additive Manufacturing Angular Speckle Correlation Engineering::Mechanical engineering Dev, Kapil A. S., Guru Prasad H, Aswin P, Prabhathan Chan, Kelvin H. K. Matham, Murukeshan Vadakke Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title | Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title_full | Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title_fullStr | Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title_full_unstemmed | Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title_short | Surface roughness measurement of additive manufactured samples using angular speckle correlation |
| title_sort | surface roughness measurement of additive manufactured samples using angular speckle correlation |
| topic | Additive Manufacturing Angular Speckle Correlation Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/105708 http://hdl.handle.net/10220/49562 |
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