ORIGINAL ILLUMINATOR, IMAGE READER, COLOR IMAGE READER, AND IMAGE FORMATION APPARATUS

摘要

PPROBLEM TO BE SOLVED: To provide an inexpensive original illuminator without providing any complicatedly shaped optical component for illuminating an original by reducing the illuminance non-uniformity of an illumination object region even when the number of light emitting elements is small. PSOLUTION: This original illumination device is provided with: a light source unit faced to an illumination object face having length and width in which a plurality of light emitting elements are arrayed in the length direction ; and one or more optical members arranged between the illumination object face and the light source unit, and the illumination object face is irradiated with a light flux from the light source unit through the optical member. A light emission interval P in the light source unit satisfies conditions specified by the configurations of the light emitting elements or illumination object face or the like. PCOPYRIGHT: (C)2008,JPO&INPIT