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.
| Original language | English |
|---|---|
| Pages (from-to) | 361-375 |
| Number of pages | 15 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4430 |
| Issue number | 1 |
| DOIs | |
| State | Published - 29 Jun 2000 |