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Intensity fluctuation spectra of dynamic laser speckle patterns acquired by a full-field temporal modulation method |
Applied Optics, Vol. 51, Issue 31, pp. 7576-7580 (2012)
http://dx.doi.org/10.1364/AO.51.007576
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Abstract
A method for obtaining the intensity fluctuation spectra of dynamic laser speckle patterns is introduced, which is based on the temporal modulation of the illumination and the subsequent integration of the intensity signals. This approach does not rely on the fast sampling rate to meet the Nyquist criterion, making it applicable for full-field imaging applications. The intensity fluctuation spectra created by the in-plane motion of a random phase object was investigated by using both a single-channel detector and a multichannel sensor. The power spectra obtained by using the full-field temporal modulation method were found to agree with the homodyne Doppler spectra obtained by using the method of autocorrelation and Fourier transform.
© 2012 Optical Society of America
OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(110.6150) Imaging systems : Speckle imaging
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: August 16, 2012
Manuscript Accepted: September 30, 2012
Published: October 25, 2012
Virtual Issues
Vol. 7, Iss. 12 Virtual Journal for Biomedical Optics
Citation
Dake Wang, Adam Moyer, and Matt Henderson, "Intensity fluctuation spectra of dynamic laser speckle patterns acquired by a full-field temporal modulation method," Appl. Opt. 51, 7576-7580 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-31-7576
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