| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illuminating device without variation in light intensity distribution in which shading, especially inhomogeneity in an image read by an image read apparatus is not likely to occur by appropriately positioning a light source which faces a light guide body. <P>SOLUTION: An illuminating device of the present invention comprises: a light guide body including an end surface from which light enters, a diffusion reflection surface diffusely reflecting light entered from the end surface and a light emitting surface emitting the light diffusely reflected by the diffusion reflection surface toward an irradiation surface; and a light source facing at least one end surface of the light guide body. The light emitting surface of the light guide body is formed of a peripheral surface. The diffusion reflection surface is arranged at a position forming an optical axis normal which passes the center of a circle forming the peripheral surface and is emitted from the light emitting surface. The light source mounted on a circuit board is arranged at a position on the optical axis normal of the diffusion reflection surface and deviated to the light emitting surface side with respect to the center of the circle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
