A method and device for exposing a light-sensitive layer, said method comprising: generating at least one light ray by use of at least one light source, illuminating pixels of an exposure pattern by use of at least one micromirror device having a plurality of micromirrors with respective mirror intensity profiles, and overlaying the mirror intensity profiles of adjacent micromirrors to provide a pattern intensity profile of the exposure pattern by summing the mirror intensity profiles of each illuminated pixel of the exposure pattern.