LIGHT GUIDE BODY, DOCUMENT LIGHTING DEVICE, AND IMAGE READER

Japanese Patent JP2014175762

A

PROBLEM TO BE SOLVED: To provide a light guide body, a document lighting device, and an image reader which suppress regular reflection images of a spot light source group from being shaped like a row of spots and which are down-size.SOLUTION: Provided is a light guide body for guiding a group of beams emitted from a group of spot light sources, the light guide body having a group of curved reflection surfaces periodically disposed in the arrangement direction of the group of spot light sources and used for regularly reflecting and condensing the group of beams, in which the expression below, where w represents the width of the regular reflection image per light source of the group of spot light sources on a regular reflection image surface formed by the group of curved reflection surfaces, and q represents the arrangement pitch of the group of spot light sources: 0.7