Patent ID: 8559073

Claim:
A document reading device comprising: a document placing unit on which a surface to be read of a document is placed, the document being composed of a plurality of sheets bound at a binding edge; an imaging unit which takes an image of the surface to be read; an illumination light source which radiates illumination light to illuminate the surface to be read; an ultraviolet light source which radiates ultraviolet light to activate a fluorescent material on the surface to be read; wherein the illumination light source is located at a position corresponding to a first edge perpendicular to the binding edge on the surface to be read and arranged to radiate illumination light toward the surface to be read in a direction intersecting with the first edge, and the ultraviolet light source is located at a position corresponding to a second edge parallel to the binding edge on the surface to be read and arranged to radiate ultraviolet light toward the surface to be read in a direction intersecting with the second edge.