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Examination of singular scalar light fields using wavelet processing of fork fringes |
Applied Optics, Vol. 50, Issue 5, pp. 773-781 (2011)
http://dx.doi.org/10.1364/AO.50.000773
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Abstract
A single frame fork fringe pattern automatic processing method for detecting optical vortices in coherent light fields using two-dimensional continuous wavelet transformation is proposed. When a vortex sign is of no importance, it is sufficient to calculate the fork interferogram modulation distribution and its normalized gradient map to establish vortex locations without resorting to complicated phase calculations. Normalization of modulation gradient maps enables unambiguous vortex discrimination from local modulation minima without phase singularity. The issue of vortex detection resolution versus carrier fringe frequency and orientation is discussed. Corroboration of simulation and experimental studies of integer and noninteger singular light beams as well as speckle fields reported in the literature and analyzed using different approaches is presented.
© 2011 Optical Society of America
OCIS Codes
(100.7410) Image processing : Wavelets
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(050.4865) Diffraction and gratings : Optical vortices
(260.6042) Physical optics : Singular optics
ToC Category:
Image Processing
History
Original Manuscript: November 10, 2010
Manuscript Accepted: January 3, 2011
Published: February 9, 2011
Citation
Krzysztof Patorski and Krzysztof Pokorski, "Examination of singular scalar light fields using wavelet processing of fork fringes," Appl. Opt. 50, 773-781 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-5-773
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