Patent ID: 8139202

Claim:
A method for point illumination of a light sensitive medium, comprising forming patterned beams onto a light sensitive medium by at least two arrays of individually controllable light valves; displacing the light sensitive medium and the patterned beams relatively, such that the patterned beams are scanned across the light sensitive medium in a scanning direction; individually controlling the light valves of said individually controlled light valves in dependency of the relative movement between the patterned beams and the light sensitive medium; and positioning the at least two arrays of individually controllable light valves on the an illumination head relative to each other, such that the arrays are mutually displaced on the illumination head and such that the respective target areas scanned by the patterned beams are contiguous wherein one and only one first optical fiber transmits light to a first of the at least two arrays of individually controlled light valves and wherein one and only one second optical fiber transmits light to a second of the at least two arrays of individually controlled light valves.