Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.optlaseng.2011.01.013
DC Field | Value | |
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dc.title | Application of least-square estimation in white-light scanning interferometry | |
dc.contributor.author | Ma, S. | |
dc.contributor.author | Quan, C. | |
dc.contributor.author | Zhu, R. | |
dc.contributor.author | Tay, C.J. | |
dc.contributor.author | Chen, L. | |
dc.contributor.author | Gao, Z. | |
dc.date.accessioned | 2014-06-17T06:12:52Z | |
dc.date.available | 2014-06-17T06:12:52Z | |
dc.date.issued | 2011-07 | |
dc.identifier.citation | Ma, S., Quan, C., Zhu, R., Tay, C.J., Chen, L., Gao, Z. (2011-07). Application of least-square estimation in white-light scanning interferometry. Optics and Lasers in Engineering 49 (7) : 1012-1018. ScholarBank@NUS Repository. https://doi.org/10.1016/j.optlaseng.2011.01.013 | |
dc.identifier.issn | 01438166 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/59558 | |
dc.description.abstract | White-light scanning interferometry (WLSI) is a powerful tool for investigating the profile of a test object that contains sharp steps. Due to the light source used in WLSI system, it is able to overcome phase ambiguity problem, which is often encountered in monochromatic interferometry. In this paper, a new algorithm based on least-square estimation using short-time Fourier transform (STFT) is proposed to measure the profile of a test object. STFT is used to extract the peak position of the coherence envelope of a white-light interference signal and retrieve the corresponding phase values simultaneously at first. A complex phasor (CP) method is introduced to further reduce the phase noise. Then, the phase values at several positions around are utilized to achieve a more accurate peak position based on least-square line fitting. Both simulated and experimental results show that the proposed algorithm is able to accurately measure the profile of a test object. © 2011 Elsevier Ltd. All rights reserved. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.optlaseng.2011.01.013 | |
dc.source | Scopus | |
dc.subject | Complex phasor (CP) | |
dc.subject | Least-square estimation | |
dc.subject | Short-time Fourier transform (STFT) | |
dc.subject | White-light scanning interferometry (WLSI) | |
dc.type | Article | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.description.doi | 10.1016/j.optlaseng.2011.01.013 | |
dc.description.sourcetitle | Optics and Lasers in Engineering | |
dc.description.volume | 49 | |
dc.description.issue | 7 | |
dc.description.page | 1012-1018 | |
dc.description.coden | OLEND | |
dc.identifier.isiut | 000291078500038 | |
Appears in Collections: | Staff Publications |
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