Laser pattern generator

Abstract From the Canadian patent

A scanning system uses a multi-beam brush having widely separated beams a , modulator that controls intensity of pixels in scan beams an optical system , that minimizes scan line bow at the expense of non-uniform scanning beam velocity, and a timing generator that generates a pixel clock signal having a variable period that compensates for the non-uniformity of pixel velocity. The wide separation of scan beams permits the modulator to turn beams on or off with a direction of brightening or darkening in the cross-section of the beams being opposite to the scanning direction. A novel arrangement of the beams in the brush permits a uniform indexing step size to uniformly expose an image …