| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a technique suppressing generation of inferiority of light exposure caused by opposing mutually different positions of a plurality of respective lens lines in a second direction. <P>SOLUTION: A plurality of light emitting elements in which every light emitting element group is made into a group, and arrays having an imaging optical system for imaging a light beam irradiated from the light emitting element group toward an imaging face conveyed in a second direction orthogonal or approximately orthogonal to a first direction on every light emitting element group, are provided. In the arrays, a plurality of imaging optical systems are provided by mutually shifting in the direction corresponding to the second direction and oppose mutually different positions in the second direction of the imaging face. Respective imaging optical systems are adjusted in accordance with differences of opposing positions in the second direction to the imaging face. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
