| 摘要 |
<p>Provided is an optical printer head (12) having one or a plurality of light emitting element array units (3). The light emitting element array unit (3) is provided with a circuit board (30); a base member (33) for supporting the circuit board (30); and a plurality of light emitting elements which are mounted on the base member (33) and are arranged in a row in main scanning directions (M1, M2). The base member (33) has a moisture absorptivity lower than that of the circuit board (30). The light emitting element array units (3) are, for instance, arranged along the main scanning directions (M1, M2) so that end portions (34) of the adjacentlight emitting element array units (3) overlap each other in sub-scanning directions (S1, S2).</p> |
