ILLUMINATING DEVICE AND IMAGE READING APPARATUS USING SAME

摘要

PROBLEM TO BE SOLVED: To provide an illuminating device which efficiently irradiates a specified area near an emission surface at a uniform intensity and an image reading apparatus which reads at a high accuracy by raising the brightness and illuminating an image reading position. SOLUTION: An illumination optical system has light sources 4 arranged in line and a light guide 5 permeable to lights from the light sources 4 which has a trapezoidal profile in a section perpendicular to the arranging direction of the light sources 4. The optical system illuminates an original 1 passing by an original reading position 12 preset near the emission surface of the light guide 5, and an image reading optical system composed of a rod lens array 6 and a sensor board 8 mounting a line sensor IC7 reads the lights passed through the original 1. COPYRIGHT: (C)2007,JPO&INPIT