| 摘要 |
<p>In order to improve the resolution of a LED printing head by a comparatively simple method, optical shutters (28) are provided between two rows of rod lens arrays (26) and LED arrays (18) correspondingly to the rod lens arrays (26). The central optical axes of rod lenses (24) in the rod lens arrays (26) are inclined by an angle of inclination υ in the opposite directions with respect to the direction of perpendicular lines passing the centers of the light-emitting surfaces of LED's (14), and signal light sent out from the LED's (14) is condensed on a photosensitive surface (20) alternately via predetermined rod lens arrays (26) so that one line is formed on the photosensitive surface (20).</p> |
