LIGHTING DEVICE, IMAGE SENSOR UNIT, IMAGE READING APPARATUS, AND BILL DISCRIMINATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce protrusion length when light sources having light-emitting parts arranged biasedly on one side in a width direction from a center position in the width direction of a light-emitting surface are disposed on both end surfaces of a light guide.SOLUTION: When viewed in a longer direction of a light guide 23, a first light source 31 is arranged at one end side of a light guide 23 so that an LED chip 36 of the first light source 31 is arranged in one end surface of the light guide 23. A second light source 32 is arranged at the other end side of the light guide 23 so that the LED chip 36 of a second light source 32 is arranged in the other end surface of the light guide 23. The first light source 31 and the second light source 32 are arranged so that a protruding direction of a first support of a first terminal and a protruding direction of a second support of a second terminal are made different. The first light source 31 and the second light source 32 are further arranged so that the protrusion lengths of the first support and the second support in a predetermined direction are reduced, from an area where the first light source 31 and the second light source 32 are overlapped when viewed in the longer direction of the light guide 23.