| 摘要 |
<p>PURPOSE:To obtain high quality recording generating no recording density irregularity, by constituting the title head so that the brightnesses of both outside light emitting arrays become high in the same degree in both outside light emitting element arrays as compared with the inside light emitting element arrays among light emitting element arrays. CONSTITUTION:Light emitting elements 12 are provided to the anode electrode 11 in a hermetically closed case 13 to form four light emitting element rows 121-124 and the thermoelectrons discharged from two cathode filaments 14 are controlled by a grid 16 and collide with the phosphor on the anode electrode to urge the phosphor to emit light. Since the light emitting element rows 121, 122 are different in the distance from the optical axis center of a SELFOX lens array, the level of the quantity of light passing is lowered as outwardly separating from the optical axis center bus scanning voltages of 120V(Ec'), 100V(Ec) are applied to the grids respectively corresponding to the light emitting element rows 121, 124 and 122, 123 as anode scanning voltages. As a result, since uniform exposure is performed, no periodic density irregularity in a main scanning direction is generated in a recording image.</p> |
