Image reading device and image forming device

摘要

An image reading device, includes an illumination optical system which has a light source unit configured to emit light being illuminating light to an illuminated object; an optical member configured to have a plurality of reflecting plates and collect the light emitted from the light source unit; and a plurality of reflecting members, the light emitted from the light source unit being collected by the optical member, and the collected light being reflected by the plurality of reflecting members to illuminate a reading target area on the illuminated object, and at least one reflecting surface of the optical member or the plurality of reflecting members having a relief structure.

主权项

1. An illumination device which illuminates a manuscript surface, comprising:
a light source unit having a plurality of LED light sources arranged in a predetermined direction; and a plurality of reflecting surfaces, which reflect light emitted from the light source unit, and guide the light to the manuscript surface, wherein a reflection region which reflects light vertically emitted from light emitting surfaces of the LED light sources includes a relief structure which changes a traveling direction of incident light in an arrangement direction of the plurality of LED light sources, wherein at least two reflecting surfaces of the plurality of reflecting surfaces are arranged to be faced to each other and to sandwich the light source unit from a direction vertical to the manuscript surface, and wherein the two reflecting surfaces are arranged such that a length of the two reflecting surfaces in a traveling direction of the light vertically emitted from the light emitting surfaces of the LED light sources is longer than a distance between the two reflecting surfaces in the direction vertical to the manuscript surface.