Patent ID: 8004725
Filing Date: 2011-08-23
Classification: H04N

Abstract:
1. A device to scan a document, comprising: a support surface for supporting a document to be scanned; a camera having an optoelectronic line sensor, said line sensor being disposed to perform line by line scanning of the document on said support surface, said line sensor generating electrical signals by said scanning of the document, said line sensor including a plurality of linearly arranged image detection elements; a lens arrangement for imaging light reflected by a document line onto a portion of said image detection elements of said line sensor; and a diaphragm lying directly above, close to, and covering the image detection elements lying outside of said portion so that no electrical charges caused by said reflected imaging light and scatter light from said reflected imaging light are generated in the image detection elements covered by said diaphragm, said diaphragm leaving said portion of said image sensor elements exposed for receiving said reflected imaging light.