Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.optcom.2007.07.004
Title: Instantaneous velocity measurement of dynamic deformation by digital holographic interferometry
Authors: Chen, H.
Quan, C. 
Tay, C.J. 
Keywords: Complex phasor (CP)
Digital holography (DH)
Instantaneous frequency
Instantaneous velocity
Interferometry
Short time Fourier transform (STFT)
Issue Date: 1-Nov-2007
Source: Chen, H., Quan, C., Tay, C.J. (2007-11-01). Instantaneous velocity measurement of dynamic deformation by digital holographic interferometry. Optics Communications 279 (1) : 27-34. ScholarBank@NUS Repository. https://doi.org/10.1016/j.optcom.2007.07.004
Abstract: A novel method for the instantaneous velocity measurement of dynamic deformation by digital holographic interferometry is proposed. During dynamic deformation, a series of digital holograms is recorded by a high-speed camera. At each pixel of the phase difference maps, phase and amplitude information are combined as complex phasor (CP). Each pixel can be then considered as an independent sensor and a sequence of complex phasors of such a sensor is analyzed by short time Fourier transform (STFT) along the time axis. A fast iterative algorithm is developed for the computation of instantaneous velocity. The displacement of each pixel can also be obtained by integration of the instantaneous velocity over time and phase unwrapping process is thus avoided. The performance of the proposed CP method is compared experimentally with the commonly used digital phase subtraction method. © 2007 Elsevier B.V. All rights reserved.
Source Title: Optics Communications
URI: http://scholarbank.nus.edu.sg/handle/10635/60560
ISSN: 00304018
DOI: 10.1016/j.optcom.2007.07.004
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

5
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

5
checked on Dec 5, 2017

Page view(s)

20
checked on Dec 11, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.