Optical scanner producing multiple scan patterns

Optical scanner producing multiple scan patterns

An optical scanning unit for scanning a bar code (60) includes a plurality of pivotably mounted pattern forming mirrors (44). A laser beam is projected along a hollow rotatable drive shaft (28) and is deflected by a plane mirror (56) secured to the drive shaft (28) to scan the beam over the pattern...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SCHUHMACHER, CHRIS A, ALESHIRE, REX A
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Beschreibung
Zusammenfassung:An optical scanning unit for scanning a bar code (60) includes a plurality of pivotably mounted pattern forming mirrors (44). A laser beam is projected along a hollow rotatable drive shaft (28) and is deflected by a plane mirror (56) secured to the drive shaft (28) to scan the beam over the pattern forming mirrors (44). Each of the pattern forming mirrors (44) includes a cam portion (78) which is engaged by a roll member (52) driven by a ring member (50) which in turn is rotated by the drive shaft (28). The unit generates a plurality of successively larger scan patterns, after which biasing members (86) return the mirrors (44) to their home position.