Abrégé

A document scanner comprises a first image sensor unit (30) and a second image sensor unit (32) and a scanning mechanism (70, 72, 76, 80) for causing relative movement between a document and the units so that the units scan the document in a scanning direction. The first unit (30) is situated ahead of the second unit (32) in the scanning direction and partially overlaps the second unit. Each sensor unit has a respective linear array (44) of electromagnetic radiation detectors and one or more light guides (48, 49) for directing light from a respective one of two imaging lines (63) on to the detectors, wherein, in use, the imaging lines scan the document to capture data representative of two respective sets of scan line portions for combination to obtain a succession of scan lines for the document, the one or more light guides of the first unit (30) are angled rearwardly with respect to the scanning direction, whilst the one or more light guides of the second unit (32) are angled forwardly with respect to the scanning direction, so as to reduce the distance with respect to the scanning direction, between the imaging lines (63).

Classes IPC  ?

• H04N 1/03 - Détails des têtes de balayage pour la lecture d'images avec des photodétecteurs disposés dans un ensemble sensiblement linéaire
• H04N 1/04 - Dispositions de balayage

Abrégé

A document scanner comprises first and second image sensor units (30,32), each having an array of electromagnetic radiation detectors (44) situated adjacent circuitry (42) for operating the detectors. A scanning mechanism (70,72,76,78,80) causes relative movement between the detectors and a document to cause the detectors to scan the document along a scanning direction. The array of detectors of the first unit (30) is situated ahead of the array of detectors of the second unit (32) in said scanning direction, the orientation of the detectors of the first unit with respect to their circuitry thus being the reverse of that of the detectors of the second unit, thereby to reduce the distance, in the scanning direction, between the two arrays.

Classes IPC  ?

• H04N 1/03 - Détails des têtes de balayage pour la lecture d'images avec des photodétecteurs disposés dans un ensemble sensiblement linéaire
• H04N 1/04 - Dispositions de balayage