| abstract |
Systems and method utilizing a laser beam to produce artwork for printed circuit boards. The laser beam is modulated in accordance with the artwork and scanned across an output medium to form an image of the artwork. The scanning means includes a reflector rotating at a constant rate. The resultant non-linearity of the linear velocity of the beam as it scans across the medium would cause corresponding non-uniform exposure of the medium. The intensity of the beam is thus varied to compensate. |