A line printing system which utilizes an array (80) of asymmetrical Fabry-Perot light valves (C 1 ,C 2 etc) for simultaneously transferring all pixel information of one raster line onto a photoreceptor (88). The number of elements of the light valve array used in this invention is equal to the number of pixels on a raster line. The pixel information is applied to elements of the light valve array in a parallel format with information representing each pixel applied to one elemental light valve of the array. The array is illuminated by a wedge-shaped incident light beam (64) forming a focussed line image. Depending on the information state of each pixel, each corresponding element will be activated to absorb incident light or left in its neutral state to reflect the light. Light reflected by neutral elements (C 2 ,C 5 ) will be directed onto the photoreceptor. In this fashion, the photoreceptor simultaneously receives the pixel information for the entire raster line. In another mode, the elements will be activated to reflect the light beam and will be left in their neutral state to absorb the light beam.