Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space
A fiber-based projection-imaging system is proposed for shape measurement in confined space. Owing to the flexibility of imaging fibers, the system can be used in special scenarios that are difficult for conventional experimental setups. Three experiments: open space, closed space, and underwater ar...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/206569 |
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| author | Lujie Chen Viswanath Bavigadda Theodoros Kofidis Robert D. Howe |
| author_facet | Lujie Chen Viswanath Bavigadda Theodoros Kofidis Robert D. Howe |
| author_sort | Lujie Chen |
| collection | DOAJ |
| description | A fiber-based projection-imaging system is proposed for shape measurement in confined space. Owing to the flexibility of imaging fibers, the system can be used in special scenarios that are difficult for conventional experimental setups. Three experiments: open space, closed space, and underwater are designed to demonstrate the strength and weakness of the system. It is shown that when proper alignment is possible, relatively high accuracy can be achieved; the error is less than 2% of the overall height of a specimen. In situations where alignment is difficult, significantly increased error is observed. The error is in the form of gross-scale geometrical distortion; for example, flat surface is reconstructed with curvature. In addition, the imaging fibers may introduce fine-scale noise into phase measurement, which has to be suppressed by smoothing filters. Based on results and analysis, it is found that although a fiber-based system has its unique strength, existing calibration and processing methods for fringe patterns have to be modified to overcome its drawbacks so as to accommodate wider applications. |
| format | Article |
| id | doaj-art-ff5c74471aca41509e8a9fe789320f0a |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-ff5c74471aca41509e8a9fe789320f0a2025-02-03T01:20:40ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/206569206569Fiber Optic Projection-Imaging System for Shape Measurement in Confined SpaceLujie Chen0Viswanath Bavigadda1Theodoros Kofidis2Robert D. Howe3Engineering Product Design, Singapore University of Technology and Design, 138682, SingaporeEngineering Product Design, Singapore University of Technology and Design, 138682, SingaporeYong Loo Lin School of Medicine, National University of Singapore, 119228, SingaporeSchool of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USAA fiber-based projection-imaging system is proposed for shape measurement in confined space. Owing to the flexibility of imaging fibers, the system can be used in special scenarios that are difficult for conventional experimental setups. Three experiments: open space, closed space, and underwater are designed to demonstrate the strength and weakness of the system. It is shown that when proper alignment is possible, relatively high accuracy can be achieved; the error is less than 2% of the overall height of a specimen. In situations where alignment is difficult, significantly increased error is observed. The error is in the form of gross-scale geometrical distortion; for example, flat surface is reconstructed with curvature. In addition, the imaging fibers may introduce fine-scale noise into phase measurement, which has to be suppressed by smoothing filters. Based on results and analysis, it is found that although a fiber-based system has its unique strength, existing calibration and processing methods for fringe patterns have to be modified to overcome its drawbacks so as to accommodate wider applications.http://dx.doi.org/10.1155/2014/206569 |
| spellingShingle | Lujie Chen Viswanath Bavigadda Theodoros Kofidis Robert D. Howe Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space The Scientific World Journal |
| title | Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space |
| title_full | Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space |
| title_fullStr | Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space |
| title_full_unstemmed | Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space |
| title_short | Fiber Optic Projection-Imaging System for Shape Measurement in Confined Space |
| title_sort | fiber optic projection imaging system for shape measurement in confined space |
| url | http://dx.doi.org/10.1155/2014/206569 |
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