Patent ID: 9554010
Date: 2017-01-24
CPC Classifications: H04N

Claim:
1. An image reading apparatus comprising: a light source which illuminates a reading position, a photoelectrical converting unit which converts received light into electricity, a mirror holder, a focusing mirror which focuses and reflects light reflected from an original at the reading position, wherein the focusing mirror has a reflecting portion having a curved reflecting surface and a pair of fixing portions which are respectively disposed at both ends of the focusing mirror in a longitudinal direction, wherein a first surface of each of the fixing portions, facing the mirror holder, has a projection, and a pair of pressing members each of which abuts to a second surface of a respective one of the fixing portions other than the first surface and each of which presses the focusing mirror toward the mirror holder, for fixing the focusing mirror on the mirror holder, wherein a geometrical moment of inertia of the fixing portions is smaller than a geometrical moment of inertia of the reflecting portion.