Kozhukhar P. Quantitative control of magnetic parameters of documents by means of magneto-optic TV systems

The developed in this dissertation magneto-optic TV-system unlike known allows performing quantitative control of magnetic parameters of documents besides qualitative. The generalized method of quantitative control of magnetic parameters of documents, which allows its classification with decreased effect of magneto-optic noise and sensitivity to changing of magnetization and print density, is developed. Improved method of magneto-optical topography allows getting a two-dimensional distribution of the signal of scattered magnetic field of documents in matrix digital form. The procedure of evaluating the sensitivity and resolution of the TV-system for the magneto-optic check is suggested. A comprehensive experimental study of the theoretical developments is passed. Developed methods allow to increase the accuracy of magnetic control (detection of falsification) of documents through the implementation of the quantitative control of their magnetic parameters, both for documents manufactured by industry (banknotes and protected forms) and made in publicly available way (print by office equipment). Herewith television systems implementing the method, retain the ability to qualitative documents research like topological and trasological, i. e. in contrast to known provide an integrated magnetic control of documents.