Patent ID: 7746558

Claim:
Method for producing a grating image, which at least has one grating field with visually recognizable, optically variable properties, in which grating lines are disposed, that are produced by means of a writing apparatus, wherein a working field of the writing apparatus has a fixed size predetermined by a deflection of a particle beam or of a light beam of the writing apparatus and the at least one grating field does not fit completely into the working field, and is to be moved to different positions of a substrate to be inscribed, the method comprising the following steps: a) determining at least one uniform grating line, which completely lies within one working field; b) defining a sequence of working fields with respect to the grating field, in each of which the at least one grating line is to be produced continuously without interruption along its entire length by means of deflection of the particle beam or of the light beam of the writing apparatus; c) moving to the working fields by relative movement of a carrier, on which is located the substrate, and the writing apparatus; d) writing the at least one grating line into the substrate by means of continuous deflection of the particle beam or of the light beam of the writing apparatus within the respective working fields.