| 摘要 |
This image reading apparatus includes a light source (1) for illuminating an object, a lens array (5) for focusing reflected light from the object into a predetermined position, and an image sensor (3) for reading an image formed by the focused light. The lens array (5) includes a transparent base (5a), and a diffraction element (8) provided on at least an incident plane and an emission plane of the base (5a). The lens array constitute an array including a plurality of lens areas. The employment of the diffraction element renders a shorter imaging distance of light from the object and thus a reduction in the size of the apparatus. |
