LIGHT SOURCE UNIT AND IMAGE READING DEVICE

摘要

The light source unit comprises a light source emitting visible light and light of a non-visible wavelength; a rod-like light guide (2) at the end of which the light source is provided and within which incident light from the light source is propagated in the long axis direction; a reflector that is linear along the long axis direction and provided on the contour surface of the light guide; and a support member (3) encompassing the reflector and light guide (2), having a given width in the direction perpendicular to the long axis direction, and provided with an opening extending along the long axis direction. The reflector and support member (3) are formed by a reflecting material containing a substance reflecting the light of a non-visible light wavelength and reflecting the visible light and light of a non-visible light wavelength.