Quasi-coaxial optical bar code reader

G - Physics – 06 – K

Patent

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Details

G06K 7/10 (2006.01)

Patent

CA 2343203

The present invention provides an inexpensive scanner that can scan at near to medium focal lengths. A light beam is generated to illuminate a target area on the scanned object. A mirrored surface (701) directs the light beam towards the object and light reflected from the object to a detector (702). The detector is positioned to receive a constant amount of reflected light from the mirrored surface.

La présente invention porte sur un dispositif de balayage de faible coût pouvant balayer à des longueurs focales proches et moyennes. Un faisceau lumineux est générer de façon à éclairer une zone cible sur l'objet balayé. Une surface réfléchissante (701) dirige le faisceau lumineux vers l'objet, la lumière étant renvoyée de l'objet vers un détecteur (702). Le détecteur est positionné de façon à recevoir une quantité constante de lumière renvoyée par la surface réfléchissante.

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