Optical scanner for reading bar codes detected within a large depth of field

Optical scanner for reading bar codes scanned by focussed scan lines having different focal lengths where at least one of the scan lines is small relative to irregularities of the surface on which the label (10) appears. The scan lines are generated using a holographic disk (18) so as to have a pred...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	DICKSON, LEROY DAVID
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CALCULATING COMPUTING COUNTING HANDLING RECORD CARRIERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS
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