Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/92121
Title: | Wavelet analysis of speckle patterns with a temporal carrier | Authors: | Fu, Yu Tay, Cho Jui Quan, Chenggen Miao, Hong |
Keywords: | DRNTU::Science::Physics::Optics and light | Issue Date: | 2005 | Source: | Fu, Y., Tay, C. J., Quan, C., & Miao, H. (2005). Wavelet analysis of speckle patterns with a temporal carrier, Applied Optics, 44(6), 959-965. | Series/Report no.: | Applied Optics | Abstract: | A novel temporal phase-analysis technique that is based on wavelet analysis and a temporal carrier is presented. To measure displacement on a vibrating object by using electronic speckle pattern interferometry, one captures a series of speckle patterns, using a high-speed CCD camera. To avoid ambiguity in phase estimation, a temporal carrier is generated by a piezoelectric transducer stage in the reference beam of the interferometer. The intensity variation of each pixel on recorded images is then analyzed along the time axis by a robust mathematical tool, i.e., a complex Morlet wavelet transform. After the temporal carrier is removed, the absolute displacement of a vibrating object is obtained without the need for temporal or spatial phase unwrapping. The results obtained by a wavelet transform are compared with those from a temporal Fourier transform. | URI: | https://hdl.handle.net/10356/92121 http://hdl.handle.net/10220/6468 |
ISSN: | 0003-6935 | DOI: | 10.1364/AO.44.000959 | Research Centres: | Temasek Laboratories | Rights: | This paper was published in [Applied Optics] 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/ao/abstract.cfm?uri=ao-44-6-959]. Systematic or multiple reproduction or distribution to multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | TL Journal Articles |
Files in This Item:
File | Description | Size | Format | |
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Wavelet analysis of speckle patterns with a temporal carrier.pdf | 1.46 MB | Adobe PDF | View/Open |
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