Patent ID: 6798496
Filing Date: 2004-09-28
Classification: G03F

Abstract:
A device for exposing by scanning at least one face of a panel, in particular a printed circuit panel, said face having a sensitivity, the device comprising a light source having a power and support means for supporting fixedly said panel facing said light source, the device further comprising:first and second moving shutters suitable for acting in succession to mask said light source at least in part, each of said shutters presenting a respective edge, said edges together defining a window of a size suitable for being adjusted and through which a light zone is generated for scanning said face of the panel to be exposed; displacement means for displacing said shutters to displace said shutters in a plane disposed between said light source and said panel, first for opening said window and adjusting said window's size by displacing said first moving shutter in front of said face of the panel to be exposed, second for displacing said adjusted window by displacing simultaneously said first and second moving shutters so that said light zone scans said face of the panel to be exposed, and third for closing said window by displacing said second moving shutter in front of said face of the panel at an end of an exposition; and displacement control means for controlling the displacement of said shutters as a function of said sensitivity of the face to be exposed and as a function of said power of said light source, in such a manner that both shutters move past said face of the fixed panel at substantially the same speed and in the same direction.