| 摘要 |
It is an object to provide an image sensor which can guarantee a good picture quality by reducing an illuminance deviation and can effectively realize a miniaturization of an apparatus. There is an image sensor constructed by, an illuminating apparatus composed of a sensor IC having a group of photoelectric converting elements arranged in a line, a lens for forming an image of light information to the sensor IC, a light source, and an optical guide for guiding a light of a light source and emitting the light in a desired direction, and a frame for holding each of the above component elements. In such an image sensor, there is disclosed an image reading apparatus which uses both of an indirect light that is emitted from a diffusing surface of the optical guide of the illuminating apparatus and a direct light from the light source and in which a diffusing member for diffusing the direct light from the light source is provided between the light source and an original to be directly illuminated.
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