| 摘要 |
An image reading apparatus includes a light guide arranged between a light source and a document. The light guide has a light incident surface at a side of the light source, light from the light source, is incident, a first light emitting surface at a side of the document, a second light emitting surface different from the first light emitting surface, a first reflecting surface between the first and second light emitting surfaces, a second reflecting surface between the light incident surface and the second light emitting surface, and a third reflecting surface facing the second reflecting surface. The first reflecting surface reflects light toward the first light emitting surface. The second reflecting surface reflects light toward one of the second light emitting surface and the first and third reflecting surfaces. The third reflecting surface reflects light toward the second light emitting surface or the first reflecting surface. |
