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Proceedings Paper

Speckle revisited: analysis of speckle noise in bar-code scanning systems
Author(s): Emanuel Marom; Sasa Kresic-Juric; Leonard Bergstein
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Paper 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 auto-correlation function and power spectral density of the detector current for general form scanning beams with arbitrary field distributions. Theoretical calculations are illustrated by numerical simulations.

Paper Details

Date Published: 29 June 2001
PDF: 15 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432867
Show Author Affiliations
Emanuel Marom, Tel-Aviv Univ. (Israel)
Sasa Kresic-Juric, Symbol Technologies, Inc. (United States)
Leonard Bergstein, Symbol Technologies, Inc. (United States)


Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics

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