| 摘要 |
<p>In a print head (10) that has a plurality of inline light beams (14) for simultaneously writing a corresponding plurality of lines of an image on a photoreceptor surface (21), the imaged spot size and center-to-center spacing are independently settable by projecting the light beams onto a diffusion screen (15) which is spaced from the light sources by an amount needed to achieve a desired spot size. The spots on the diffusion screen are then imaged onto the photoreceptor surface (21) by imaging optics with a desired magnification to achieve a desired center-to-center spacing (d) between spots on the photoreceptor surface. For a given magnification value the photoreceptor spot size can be set by the spacing between the light source and the diffusion screen independent of the center-to-center spacing between the spots.</p> |
