B - Operations – Transporting – 41 – B
Patent
B - Operations, Transporting
41
B
95/14
B41B 19/00 (2006.01) G06K 15/12 (2006.01)
Patent
CA 1264249
ABSTRACT OF THE DISCLOSURE A laser beam is widened in one dimension to cover an array of a substantial number of electro-optic gates. The beam is divided by the gates into a plurality of potential spot-forming beams. The transmission of each such beam to a photosensitive surface is selectively inhibited in accordance with a pre-determined pattern or program, while the beams are swept relative to the photosensitive surface to form characters and other images. Preferably, the gates are formed by a wafer of PLZT electro-optoc ceramic material, with a large number of closely-spaced electrodes on the surface, in cooperation with a crossed polarizer. Preferably, the beams are collimated and a traveling lens and reflector combination is moved parallel to the photo- sensitive surface in the collimated beams to space the spots on the film from one another. The collimated beams are made convergent so that a relatively small, light-weight lens can be used to compose relatively long lines of text without excessive loss of light or vignetting. Also provided are a relatively simple but stable lens-reflector carriage and rail structure on which the carriage travels in order to sweep the beam relative to the photosensitive surface.
495717
Bereskin & Parr
Moulin Michel
LandOfFree
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