LINE LIGHT SOURCE AND CONTACT TYPE IMAGE SENSOR

PROBLEM TO BE SOLVED: To provide a line light source unit (line light source) with which light converted into visible light by a fluorescent member irradiates the surface of an original from the emission part of a light guide member as illumination with the uniform distribution of strength (illuminance), and to provide a contact type image sensor (image sensor) mounting the unit. SOLUTION: The line light source includes the light guide member 3 which is arranged in the neighborhood of an LED chip 1 for radiating UV rays and is constituted of columns and prisms for guiding the light; and the fluorescent member 4 which is arranged with a prescribed pattern in a main operation direction along the surface of the light guide member 3 and emits fluorescence by receiving light from the UV rays. The light from the fluorescent member 4 irradiates the original 5 from the emission part 3a of the light guide member 3 and reflection light with various spectra from the original is received by an imaging element 7 so as to obtain a color reading image, etc. COPYRIGHT: (C)2006,JPO&NCIPI