| 摘要 |
<p>An exposure head is provided with a plurality of linear light emitting element arrays (6R, 6G, 6B). In each of the arrays, light emitting elements are arranged in parallel in one line, and the arrays are arranged in parallel in a direction substantially vertical to the direction wherein the light emitting elements are arranged, so as to emit beams of colors different from each other. The exposure head is also provided with one equal magnification lens array (7), which is composed of a plurality of lenses (7a), which collect the light emitted from the linear light emitting element arrays (6R, 6G, 6B) and are assembled in stagger arrangement substantially parallel to an arrangement direction of the light emitting elements, so as to collect the light of each color on a color photosensitive material. Among the plurality of linear light emitting element arrays (6R, 6G, 6B), the linear light emitting element array (6G) which emits light that exposes a coloring layer of the color photosensitive material having the highest relative luminosity is arranged closest to a long axis (L) of the equal magnification lens array (7). Thus, the color exposure head which does not generate much concentration nonuniformity due to light quantity fluctuation of exposure beams passed through the equal magnification lens array is provided.</p> |
