| 摘要 |
<p>An exposure head comprises linear light-emitting element arrays (6R, 6G, 6B) each composed of a line of light-emitting elements, arranged in the direction generally perpendicular to the lines of light-emitting elements, and capable of emitting lights of different colors, lenses (7a) for focusing the respective lights emitted from the linear light-emitting element arrays (6R, 6G, 6B) aggregated staggeredly and generally parallel to the lines of light-emitting elements, and a unity-magnification lens array (7) for focusing the color lights onto a color photosensitive material. Out of the linear light-emitting element arrays (6R, 6G, 6B), the linear light-emitting array (6R) emits a light to expose the coloring layer constituting the color photosensitive material and having a gamma characteristic which is the greatest in the range of density of 0.5 to 1.0. The linear light-emitting array (6R) is disposed nearest to the major axis L of the unity-magnification lens array (7). With this, a color exposure head not causing large density variation due to the variation of the amount of exposure light passing through the unity-magnification lens array is provided.</p> |
