Measurement of large discontinuities using single white light interferogram white light interferogram
White light interferometry is a widely used tool to extend the unambiguous measurement range of a monochromatic interferometer. In this work, we discuss Hilbert transformation analysis of a single white light interferogram acquired with a single-chip color CCD camera for step height measurement whic...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/101363 http://hdl.handle.net/10220/24151 |
| _version_ | 1826128319986270208 |
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| author | Upputuri, Paul Kumar Gong, Li Wang, Haifeng Pramanik, Manojit Nandigana, Krishna Mohan Kothiyal, Mahendra Prasad |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Upputuri, Paul Kumar Gong, Li Wang, Haifeng Pramanik, Manojit Nandigana, Krishna Mohan Kothiyal, Mahendra Prasad |
| author_sort | Upputuri, Paul Kumar |
| collection | NTU |
| description | White light interferometry is a widely used tool to extend the unambiguous measurement range of a monochromatic interferometer. In this work, we discuss Hilbert transformation analysis of a single white light interferogram acquired with a single-chip color CCD camera for step height measurement which lies beyond the unambiguous range of the monochromatic interferometry. The color interferogram is decomposed and phase maps for red, green, and blue components are calculated independently using Hilbert transformation. This procedure makes the measurement faster, simpler, and cost-effective. The usefulness of the technique is demonstrated on micro-sample. |
| first_indexed | 2024-10-01T07:23:03Z |
| format | Journal Article |
| id | ntu-10356/101363 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:23:03Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1013632023-12-29T06:52:07Z Measurement of large discontinuities using single white light interferogram white light interferogram Upputuri, Paul Kumar Gong, Li Wang, Haifeng Pramanik, Manojit Nandigana, Krishna Mohan Kothiyal, Mahendra Prasad School of Chemical and Biomedical Engineering DRNTU::Science::Biological sciences::Biochemistry White light interferometry is a widely used tool to extend the unambiguous measurement range of a monochromatic interferometer. In this work, we discuss Hilbert transformation analysis of a single white light interferogram acquired with a single-chip color CCD camera for step height measurement which lies beyond the unambiguous range of the monochromatic interferometry. The color interferogram is decomposed and phase maps for red, green, and blue components are calculated independently using Hilbert transformation. This procedure makes the measurement faster, simpler, and cost-effective. The usefulness of the technique is demonstrated on micro-sample. Accepted version 2014-10-30T00:45:19Z 2019-12-06T20:37:13Z 2014-10-30T00:45:19Z 2019-12-06T20:37:13Z 2014 2014 Journal Article Upputuri, P. K., Gong, L., Wang, H., Pramanik, M., Nandigana, K. M., & Kothiyal, M. P. (2014). Measurement of large discontinuities using single white light interferogram. Optics express, 22(22), 27373-27380. 1094-4087 https://hdl.handle.net/10356/101363 http://hdl.handle.net/10220/24151 10.1364/OE.22.027373 182536 en Optics express © 2014 Optical Society of America. This is the author created version of a work that has been peer reviewed and accepted for publication by Optics Express, Optical Society of America. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [Article DOI: http://dx.doi.org/10.1364/OE.22.027373]. application/pdf |
| spellingShingle | DRNTU::Science::Biological sciences::Biochemistry Upputuri, Paul Kumar Gong, Li Wang, Haifeng Pramanik, Manojit Nandigana, Krishna Mohan Kothiyal, Mahendra Prasad Measurement of large discontinuities using single white light interferogram white light interferogram |
| title | Measurement of large discontinuities using single white light interferogram white light interferogram |
| title_full | Measurement of large discontinuities using single white light interferogram white light interferogram |
| title_fullStr | Measurement of large discontinuities using single white light interferogram white light interferogram |
| title_full_unstemmed | Measurement of large discontinuities using single white light interferogram white light interferogram |
| title_short | Measurement of large discontinuities using single white light interferogram white light interferogram |
| title_sort | measurement of large discontinuities using single white light interferogram white light interferogram |
| topic | DRNTU::Science::Biological sciences::Biochemistry |
| url | https://hdl.handle.net/10356/101363 http://hdl.handle.net/10220/24151 |
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