| 摘要 |
<p>An image reading apparatus comprises a multiline sensor on which a plurality of linear sensor arrays are arranged on a single substrate, a focusing optical system for focusing an object image on the multiline sensor and a blazed diffraction grating, disposed in an optical path between the focusing optical system and the multiline sensor, for color-separating light from the object into a plurality of light components and guiding the color-separated light components to the corresponding sensor arrays. The grating thickness of the blazed diffraction grating is changed in correspondence with an angle of light incident on the blazed diffraction grating.</p> |
