Fiber optic displacement sensor for micro‐thickness measurement
Purpose-The purpose of this paper is to propose and demonstrate a simple yet accurate optical fibre based sensor capable of performing micron and sub-micron thickness measurement. Design/methodology/approach-The proposed sensor consists of a multimode plastic probe, three He-Ne lasers and translatio...
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Emerald
2012
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author | Ahmad, Harith Yasin, Moh Thambiratnam, Kavintheran Harun, Sulaiman Wadi |
author_facet | Ahmad, Harith Yasin, Moh Thambiratnam, Kavintheran Harun, Sulaiman Wadi |
author_sort | Ahmad, Harith |
collection | UM |
description | Purpose-The purpose of this paper is to propose and demonstrate a simple yet accurate optical fibre based sensor capable of performing micron and sub-micron thickness measurement. Design/methodology/approach-The proposed sensor consists of a multimode plastic probe, three He-Ne lasers and translation stages along with a silicon photodiode and a lock-in amplifier to measure the output voltage as the displacement of the sensor is increased. Findings-The system operating with a source wavelength of 633 nm can provide measurements of up to 3mm with a sensitivity of 0.0054 mV/mm. Originality/value-The thickness of the sample can be obtained from a linear equation correlating the thickness of the sample to the displacement of the sensor at which the peak output voltage is obtained, or by correlating the thickness of the sample directly to the peak output voltage measured. |
first_indexed | 2024-03-06T05:49:42Z |
format | Article |
id | um.eprints-19925 |
institution | Universiti Malaya |
last_indexed | 2024-03-06T05:49:42Z |
publishDate | 2012 |
publisher | Emerald |
record_format | dspace |
spelling | um.eprints-199252019-01-07T07:15:07Z http://eprints.um.edu.my/19925/ Fiber optic displacement sensor for micro‐thickness measurement Ahmad, Harith Yasin, Moh Thambiratnam, Kavintheran Harun, Sulaiman Wadi QC Physics TK Electrical engineering. Electronics Nuclear engineering Purpose-The purpose of this paper is to propose and demonstrate a simple yet accurate optical fibre based sensor capable of performing micron and sub-micron thickness measurement. Design/methodology/approach-The proposed sensor consists of a multimode plastic probe, three He-Ne lasers and translation stages along with a silicon photodiode and a lock-in amplifier to measure the output voltage as the displacement of the sensor is increased. Findings-The system operating with a source wavelength of 633 nm can provide measurements of up to 3mm with a sensitivity of 0.0054 mV/mm. Originality/value-The thickness of the sample can be obtained from a linear equation correlating the thickness of the sample to the displacement of the sensor at which the peak output voltage is obtained, or by correlating the thickness of the sample directly to the peak output voltage measured. Emerald 2012 Article PeerReviewed Ahmad, Harith and Yasin, Moh and Thambiratnam, Kavintheran and Harun, Sulaiman Wadi (2012) Fiber optic displacement sensor for micro‐thickness measurement. Sensor Review, 32 (3). pp. 230-235. ISSN 0260-2288, DOI https://doi.org/10.1108/02602281211233223 <https://doi.org/10.1108/02602281211233223>. https://doi.org/10.1108/02602281211233223 doi:10.1108/02602281211233223 |
spellingShingle | QC Physics TK Electrical engineering. Electronics Nuclear engineering Ahmad, Harith Yasin, Moh Thambiratnam, Kavintheran Harun, Sulaiman Wadi Fiber optic displacement sensor for micro‐thickness measurement |
title | Fiber optic displacement sensor for micro‐thickness measurement |
title_full | Fiber optic displacement sensor for micro‐thickness measurement |
title_fullStr | Fiber optic displacement sensor for micro‐thickness measurement |
title_full_unstemmed | Fiber optic displacement sensor for micro‐thickness measurement |
title_short | Fiber optic displacement sensor for micro‐thickness measurement |
title_sort | fiber optic displacement sensor for micro thickness measurement |
topic | QC Physics TK Electrical engineering. Electronics Nuclear engineering |
work_keys_str_mv | AT ahmadharith fiberopticdisplacementsensorformicrothicknessmeasurement AT yasinmoh fiberopticdisplacementsensorformicrothicknessmeasurement AT thambiratnamkavintheran fiberopticdisplacementsensorformicrothicknessmeasurement AT harunsulaimanwadi fiberopticdisplacementsensorformicrothicknessmeasurement |