Laser read-write system for the production of engravings

Details Laser read-write system for the production of engravings Laser read-write system for the production of engravings

H - Electricity

04

N

178/3, 327/1.4

H04N 1/02 (1980.01)

Patent

CA 1085307

ABSTRACT OF THE DISCLOSURE Engraving apparatus with particular reference to a plate to be engraved having a photosensitive surface in which a write laser beam exposes ? surface by scanning the same in conjunction with a read optical path asso- ciated with a copy board positioned proximate the plate. Means, for example, such a read laser beam scans the copy board, the reflection therefrom being noted and used to control the intensity of the write beam. The optical scanning elements of both the read optical path and the write beam are common to each so that positional error due to vibrations in the optical components is eliminated. Provision is made for read-right conversion to read-wrong during preparation of a plate, both by use of memory circuits and by geometrical arrangement. Independent width and length magnification, other than unity, are also provided.

243825

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