Patent attributes
An image reading apparatus includes a lens unit (4) which has a low-resolution lens (1), a high-resolution lens (2), and a first driving unit (3) for driving them, and a second driving unit (5) for driving the lens unit (4). At a first resolution, the low-resolution lens (1) is placed on the optical axis at a first location and the high-resolution lens (2) is placed off the optical axis. At a second resolution higher than the first resolution, the low-resolution lens (1) is placed off the optical axis and the high-resolution lens (2) is placed on the optical axis at a second location. At a third resolution higher than the second resolution, the low-resolution lens (1) is placed off the optical axis and the high-resolution lens (2) is placed on the optical axis at a third location.
