Scanner utilizing light pipe with diffuser

G - Physics – 06 – K

Patent

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Details

G06K 7/10 (2006.01) G06K 7/14 (2006.01)

Patent

CA 2406616

A scanner that can include a light source (3810) emitting light through a light pipe (3820) to a detector array. The light pipe can include a reflective surface (3822) and a diffuser (3824). The reflective surface can reflect light (3815), directly or indirectly towards the diffuser and the diffuser can diffuse the light out of the light pipe. The light pipe can further include a reflective groove that reflects light from the reflective surface towards the diffuser. The diffuser can diffuse the light to an object that reflects the light to the detector army. The object may be a bar code, paper money, or any other object that can be scanned. The diffuser may be a variable diffuser.

La présente invention concerne un lecteur optique comportant une source de lumière (3810) émettant la lumière via une fibre optique (3820) en direction d'une matrice de détection. La fibre optique comporte une surface réfléchissante (3822) et un diffuseur (3824). La surface réfléchissante renvoie la lumière (3815), directement ou indirectement, en direction du diffuseur, lequel diffuse la lumière en sortie de la fibre optique. La fibre optique comporte en outre une rainure réfléchissante renvoyant la lumière vers le diffuseur en direction de la surface réfléchissante. Le diffuseur diffuse la lumière en direction d'un objet qui renvoie la lumière sur la matrice de détection. L'objet considéré est notamment un code à barres, du papier monnaie, ou tout autre objet à passer au lecteur optique. Le diffuseur peut être un diffuseur variable.

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