DEVICE FOR FOCUSING A LASER BEAM EXITING FROM A GLASS FIBER

摘要

Imaging on an offset printing plate is accomplished with the aid of laser beams. The laser beams are produced by laser diodes and are conducted to the offset printing plate by glass fibers and are formed onto the offset printing plate by lenses or lens arrangements to produce picture elements. In order to provide compact lenses or lens arrangements, a fresnel lens or a holographic lens is utilized.