BARCODE SCANNER/READER HAVING CONSTANTLY VARYING FOCAL DISTANCE

BARCODE SCANNER/READER HAVING CONSTANTLY VARYING FOCAL DISTANCE

A scanner/reader for reading target objects, such as a barcode, that incorporates a variable focus liquid lens whose focal distance is constantly and continuously varied through the lens' predefined focal range provides an efficient way to scan or read a barcode. A driver circuit for the liquid...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: GOOD TIMOTHY 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:A scanner/reader for reading target objects, such as a barcode, that incorporates a variable focus liquid lens whose focal distance is constantly and continuously varied through the lens' predefined focal range provides an efficient way to scan or read a barcode. A driver circuit for the liquid lens continuously generates a lens driver signal that provides the liquid lens with a continuously varying voltage input to the liquid lens and thus varying the focal distance of the liquid lens cyclically through a predefined focal range.