CONTACT IMAGE SENSOR, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a contact image sensor capable of ensuring the received light quantity of a light receiving element without increasing the light quantity of a light source. SOLUTION: The contact image sensor includes: a housing 3; LED line illumination devices 40 and 41 for irradiating a document 1 with light; cylindrical lenses 6a and 6b arranged in the grooves 5 provided in the housing 3 for image-forming reflected light from the reading position A of the document 1; an aperture angle regulation member 8 having a slit part 7 for regulating the aperture angle of the cylindrical lens 6a by covering the cylindrical lens 6a for making the reflected light be incident directly; and a light receiving element array 11 for receiving and photoelectrically converting the reflected light image-formed by the cylindrical lenses 6a and 6b. Then, by providing a mirrored surface part 9 on the inclined surface of the aperture angle regulation member 8, a part of the light irradiated from the LED line illumination devices 40 and 41 is reflected at the reading position A of the document 1. COPYRIGHT: (C)2009,JPO&INPIT