ORIGINAL READING LENS/ORIGINAL READING LENS UNIT, ORIGINAL READER, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To make an original reading lens wider in an angle of view and higher in performance.;SOLUTION: The lens for reading an original image has three positive lenses (L 1, L 2, and L 3), three negative lenses (L 3, L 4, and L 5) and a stop SB, has at least one or more cemented lenses of the positive lenses and the negative lenses, and has one or more aspheric faces. The lens adjacent to the stop SB has the aspheric face and at least one of the cemented lenses is arranged adjacently to the stop SB.;COPYRIGHT: (C)2005,JPO&NCIPI