A lens unit, LED heads, an exposure apparatus, an image forming apparatus and a reader

摘要

PROBLEM TO BE SOLVED: To provide a lens unit capable of preventing deterioration in contrast due to stray light, and to provide an LED head, an exposure device, an image forming device, and a reading device having the lens unit.;SOLUTION: A lens unit includes a lens array in which multiple pairs of lenses, each pair of lenses having a first lens for forming a minified inverted image of an object and a second lens for forming a magnified inverted image of the image formed by the first lens, are substantially linearly arranged, a first light shielding member having a first hole between the first lens and the second lens, and a second light shielding member having a second hole between the object and the first lens. The first hole is formed such that an aperture dimension thereof on the second lens side is larger than that on the first lens side, and the second hole is formed such that an aperture dimension thereof on the object side is larger than that on the first lens side.;COPYRIGHT: (C)2013,JPO&INPIT