Time-averaged in-line digital holographic interferometry for vibration analysis
Time-averaged in-line digital holography is applied for vibration analysis. In particular, by use of a double-exposure approach, simultaneous determination of vibration mode shape and mean static state deformation during a vibration cycle are obtained. The subtraction of two numerically reconstructe...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/94143 http://hdl.handle.net/10220/7025 |
| _version_ | 1811676375008935936 |
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| author | Anand, Asundi Singh, Vijay Raj |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Anand, Asundi Singh, Vijay Raj |
| author_sort | Anand, Asundi |
| collection | NTU |
| description | Time-averaged in-line digital holography is applied for vibration analysis. In particular, by use of a double-exposure approach, simultaneous determination of vibration mode shape and mean static state deformation during a vibration cycle are obtained. The subtraction of two numerically reconstructed digital holograms recorded at the same resonant frequency but with a small difference in amplitude shows the mixing of Bessel-type time-averaged fringes owing to vibration and of the double-exposure fringes owing to differences in the mean deformation of the object. It is shown that separation of these fringe patterns can be readily accomplished numerically. An experimental demonstration of this effect by use of in-line digital holography for relatively small membranes is demonstrated. |
| first_indexed | 2024-10-01T02:20:28Z |
| format | Journal Article |
| id | ntu-10356/94143 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:20:28Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/941432023-03-04T17:12:13Z Time-averaged in-line digital holographic interferometry for vibration analysis Anand, Asundi Singh, Vijay Raj School of Mechanical and Aerospace Engineering DRNTU::Science::Physics::Optics and light Time-averaged in-line digital holography is applied for vibration analysis. In particular, by use of a double-exposure approach, simultaneous determination of vibration mode shape and mean static state deformation during a vibration cycle are obtained. The subtraction of two numerically reconstructed digital holograms recorded at the same resonant frequency but with a small difference in amplitude shows the mixing of Bessel-type time-averaged fringes owing to vibration and of the double-exposure fringes owing to differences in the mean deformation of the object. It is shown that separation of these fringe patterns can be readily accomplished numerically. An experimental demonstration of this effect by use of in-line digital holography for relatively small membranes is demonstrated. Accepted version 2011-09-08T06:41:38Z 2019-12-06T18:51:27Z 2011-09-08T06:41:38Z 2019-12-06T18:51:27Z 2006 2006 Journal Article Anand, A., & Singh, V. R. (2006). Time-averaged in-line digital holographic interferometry for vibration analysis. Applied optics, 45(11), 2391-2395. 0003-6935 https://hdl.handle.net/10356/94143 http://hdl.handle.net/10220/7025 10.1364/AO.45.002391 143345 en Applied optics 5 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Optics and light Anand, Asundi Singh, Vijay Raj Time-averaged in-line digital holographic interferometry for vibration analysis |
| title | Time-averaged in-line digital holographic interferometry for vibration analysis |
| title_full | Time-averaged in-line digital holographic interferometry for vibration analysis |
| title_fullStr | Time-averaged in-line digital holographic interferometry for vibration analysis |
| title_full_unstemmed | Time-averaged in-line digital holographic interferometry for vibration analysis |
| title_short | Time-averaged in-line digital holographic interferometry for vibration analysis |
| title_sort | time averaged in line digital holographic interferometry for vibration analysis |
| topic | DRNTU::Science::Physics::Optics and light |
| url | https://hdl.handle.net/10356/94143 http://hdl.handle.net/10220/7025 |
| work_keys_str_mv | AT anandasundi timeaveragedinlinedigitalholographicinterferometryforvibrationanalysis AT singhvijayraj timeaveragedinlinedigitalholographicinterferometryforvibrationanalysis |