An apparatus to expose a light-responsive material comprising: a light source (201, 203) to produce at least two light beams (210, 220) having a combined intensity at a location of the light-responsive material, where said at least two light beams include at least one light beam having a controllable intensity on the light responsive material, and where said combined intensity is controllable between: a first combined intensity insufficient to expose the light-responsive material; and a second combined intensity sufficient to expose the light-responsive material characterized in that the apparatus is adapted so that the intensity of the at least one light beam is controlled by control signals, provided by a computer system such that the light-responsive material is exposed in response to imaging data; and that the apparatus is adapted so that the at least one light beam illuminates one or more circular areas at said location of the light-responsive material; and that the apparatus is adapted to ablate the light-responsive material having an ablation threshold; and that the at least two light beams include further a background light beam providing a first individual intensity on the light responsive material; and that the background light beam illuminates a further area (300, 300', 300") extending around said one or more circular areas at said location of the light-responsive material and provides a continuous deposition of power surrounding the one or more circular areas; and that the first individual intensity is insufficient for ablating said further area, the first combined intensity is insufficient to ablate the one or more circular areas; and that the second combined intensity is sufficient to ablate the one or more circular areas. a light source (201, 203) to produce at least two light beams (210, 220) having a combined intensity at a location of the light-responsive material, where said at least two light beams include at least one light beam having a controllable intensity on the light responsive material, and where said combined intensity is controllable between: a first combined intensity insufficient to expose the light-responsive material; and a second combined intensity sufficient to expose the light-responsive material characterized in that the apparatus is adapted so that the intensity of the at least one light beam is controlled by control signals, provided by a computer system such that the light-responsive material is exposed in response to imaging data; and that the apparatus is adapted so that the at least one light beam illuminates one or more circular areas at said location of the light-responsive material; and that the apparatus is adapted to ablate the light-responsive material having an ablation threshold; and that the at least two light beams include further a background light beam providing a first individual intensity on the light responsive material; and that the background light beam illuminates a further area (300, 300', 300") extending around said one or more circular areas at said location of the light-responsive material and provides a continuous deposition of power surrounding the one or more circular areas; and that the first individual intensity is insufficient for ablating said further area, the first combined intensity is insufficient to ablate the one or more circular areas; and that the second combined intensity is sufficient to ablate the one or more circular areas. a first combined intensity insufficient to expose the light-responsive material; and a second combined intensity sufficient to expose the light-responsive material characterized in that the apparatus is adapted so that the intensity of the at least one light beam is controlled by control signals, provided by a computer system such that the light-responsive material is exposed in response to imaging data; and that the apparatus is adapted so that the at least one light beam illuminates one or more circular areas at said location of the light-responsive material; and that the apparatus is adapted to ablate the light-responsive material having an ablation threshold; and that the at least two light beams include further a background light beam providing a first individual intensity on the light responsive material; and that the background light beam illuminates a further area (300, 300', 300") extending around said one or more circular areas at said location of the light-responsive material and provides a continuous deposition of power surrounding the one or more circular areas; and that the first individual intensity is insufficient for ablating said further area, the first combined intensity is insufficient to ablate the one or more circular areas; and that the second combined intensity is sufficient to ablate the one or more circular areas.