Patent ID: 9167122
Filing Date: 2015-10-20
Classification: F21K,F21Y,H04N

Abstract:
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.