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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Main Authors: Ahmad, Harith, Yasin, Moh, Thambiratnam, Kavintheran, Harun, Sulaiman Wadi
Format: Article
Published: Emerald 2012
Subjects:
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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.
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institution Universiti Malaya
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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
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AT yasinmoh fiberopticdisplacementsensorformicrothicknessmeasurement
AT thambiratnamkavintheran fiberopticdisplacementsensorformicrothicknessmeasurement
AT harunsulaimanwadi fiberopticdisplacementsensorformicrothicknessmeasurement