Patent ID: 7709815

Claim:
A lithography system in which an electronic image pattern is delivered to an exposure tool for projecting an image to a target surface, said exposure tool comprising: a control unit ( 60 ) and a modulator ( 24 ) for controlling exposure projections, said modulator at least partly being included in the projection space of said exposure tool and comprising a light sensitive part, wherein the control unit is adapted to provide the modulator with control data by means of modulated light beams emitted by an emitter part to the light sensitive part of said modulator, a free space optical interconnect arranged for coupling the modulated light beams into the light-sensitive part of the modulator, characterized in that the free space optical interconnect comprises a holed mirror having a reflective surface arranged for reflecting said modulated light beams towards the light sensitive part of the modulator for on-axis incidence on said light sensitive part, said hole or holes in the mirror being provided for passage of said exposure projections.