FIELD: security facilities.
SUBSTANCE: invention relates to the protection of securities, especially banknotes, against forgery by creating a protective image within securities that is not available for forgery. To create a protective image inside the security, at first, a thread is inserted into the inside of the security at the stage of its manufacturing, and then a protective image is applied to this thread. In this case, the specified points on the face of the security paper are acted upon by laser radiation pulses, which form channels' inlets on it, penetrate inside the thread, form an image on the thread protecting the security against forgery, thread the reverse side of the security and create in it the outlets. Yarn is a plastic substrate with a layer of phosphor deposited on it, with a partially immersed in it a monolayer of glass microlenses in the form of transparent microspheres covered with a layer of metallized foil. When laser pulses interact with metallized foils, microlenses and a phosphor inside the filament, color dots of the protective image from crystal-like structures form within the laser spot.
EFFECT: provides reliability growth of securities protection against forgery.
4 cl, 3 dwg
