A lensless printing system with a light bar printhead

摘要

There is disclosed a printing system in which an array (42) of VCSELs as a light bar print head directly sends an array of light beams (44) onto a photoreceptor (46) without using an imaging optical element. In this invention VCSELs (42) are selected to have slowly diverging light beams (44). The photoreceptor (46) is placed at a certain distance from the VCSELs (42) where the light beam has a width equal to a desired spot corresponding to a given printing resolution.