Spatially encoded multibeam laser Doppler vibrometry using a single photodetector
A laser Doppler vibrometer with single photodetector is introduced to measure the vibration on multiple...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/91973 http://hdl.handle.net/10220/6463 |
| _version_ | 1811677578076880896 |
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| author | Fu, Yu Guo, Min Phua, Poh Boon |
| author2 | Temasek Laboratories |
| author_facet | Temasek Laboratories Fu, Yu Guo, Min Phua, Poh Boon |
| author_sort | Fu, Yu |
| collection | NTU |
| description | A laser Doppler vibrometer with single photodetector is introduced to measure the vibration on multiple
points of target simultaneously. A 2 5 beam array with various frequency shifts is generated by three
acousto-optic devices, illuminating different points on a vibrating object. The reflected beams interfere with
a reference beam on a high-speed photodetector, and the signal is amplified and digitized with a rate of
500 megasamples/s. To extract vibration information of different points, the carrier frequencies of each
beam are elaborately designed so that they can be separated from cross-talk regions in the spectrum. The
experimental results are compared with that from a commercial single-point vibrometer, and the comparison
shows that it is possible to do a precise measurement on multiple points simultaneously using a single
photodetector. |
| first_indexed | 2024-10-01T02:39:35Z |
| format | Journal Article |
| id | ntu-10356/91973 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:39:35Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/919732020-09-26T22:16:23Z Spatially encoded multibeam laser Doppler vibrometry using a single photodetector Fu, Yu Guo, Min Phua, Poh Boon Temasek Laboratories DRNTU::Science::Physics::Optics and light A laser Doppler vibrometer with single photodetector is introduced to measure the vibration on multiple points of target simultaneously. A 2 5 beam array with various frequency shifts is generated by three acousto-optic devices, illuminating different points on a vibrating object. The reflected beams interfere with a reference beam on a high-speed photodetector, and the signal is amplified and digitized with a rate of 500 megasamples/s. To extract vibration information of different points, the carrier frequencies of each beam are elaborately designed so that they can be separated from cross-talk regions in the spectrum. The experimental results are compared with that from a commercial single-point vibrometer, and the comparison shows that it is possible to do a precise measurement on multiple points simultaneously using a single photodetector. Published version 2010-11-23T06:13:13Z 2019-12-06T18:15:04Z 2010-11-23T06:13:13Z 2019-12-06T18:15:04Z 2010 2010 Journal Article Fu. Y., Guo, M., & Phua, P. B. (2010). Spatially encoded multibeam laser Doppler vibrometry using a single photodetector, Optics Letters, 35(9), 1356-1358. 0146-9592 https://hdl.handle.net/10356/91973 http://hdl.handle.net/10220/6463 10.1364/OL.35.001356 154706 en Optics letters This paper was published in [Optics Letters] and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: [http://www.opticsinfobase.org/abstract.cfm?URI=ol-35-9-1356]. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. 3 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Optics and light Fu, Yu Guo, Min Phua, Poh Boon Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title | Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title_full | Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title_fullStr | Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title_full_unstemmed | Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title_short | Spatially encoded multibeam laser Doppler vibrometry using a single photodetector |
| title_sort | spatially encoded multibeam laser doppler vibrometry using a single photodetector |
| topic | DRNTU::Science::Physics::Optics and light |
| url | https://hdl.handle.net/10356/91973 http://hdl.handle.net/10220/6463 |
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