| 摘要 |
<p>PURPOSE:To restrain unevenness in recording density by dispersion of a quantity of light of each light emitting element, by a method wherein the quantity of light for black information recording of all light emitting elements on a light emitting element array is established within a saturated area of light attenuation characteristics of a photosensitive material, and the light emitting array is driven. CONSTITUTION:Almost B point or higher of light attenuation characteristics which a photosensitive material has is in a saturated area. Though light exposure varies within this range, electric potential of the photosensitive material is almost constant. A lowest light quantity W0 for black information recording at an initial characteristic of a light emitting element array is so established as to conform to the quantity of light at point B, and the light emitting element array is driven. When the maximum quantity of light W1 of the light emitting element is taken in that case, the electric potential of the photosensitive material disperses within a range from V0 (lowest) to V1 (highest). However, a dispersion width of this electric potential is extremely less by comparing it with that in the case where driven within a non-saturated area of the light attenuation characteristics. Further, though recording density disperses within a range of D0-D1 according to a dispersion range of this electric potential, said dispersion is extreamely decreased by comparing with that in a case of driving within the non-saturated area of the light attenuation characteristics.</p> |
