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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 18, Iss. 4 — Apr. 1, 2001
  • pp: 888–901

Analysis of speckle noise in bar-code scanning systems

Emanuel Marom, Saša Krešic-Jurić, and Leonard Bergstein  »View Author Affiliations


JOSA A, Vol. 18, Issue 4, pp. 888-901 (2001)
http://dx.doi.org/10.1364/JOSAA.18.000888


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Abstract

Laser beams used for bar-code scanning exhibit speckle noise generated by the roughness of the surface on which bar codes are printed. Statistical properties of a photodetector signal that integrates a time-varying speckle pattern falling on its aperture are analyzed in detail. We derive simple closed-form expressions for the autocorrelation function and the power spectral density of the detector current for scanning beams with arbitrary field distributions. Theoretical calculations are illustrated by numerical simulations as well.

© 2001 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(260.0260) Physical optics : Physical optics
(290.5880) Scattering : Scattering, rough surfaces

History
Original Manuscript: October 29, 1999
Revised Manuscript: August 15, 2000
Manuscript Accepted: October 25, 2000
Published: April 1, 2001

Citation
Emanuel Marom, Saša Krešic-Jurić, and Leonard Bergstein, "Analysis of speckle noise in bar-code scanning systems," J. Opt. Soc. Am. A 18, 888-901 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-4-888


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References

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