FIELD: protection of securities and documents against forgery. SUBSTANCE: in the known Fourier hologram reproduction system the point source of reference wave is transferred from the front focal plane of the Fourier optical system of object image transformation to infinity. The Fourier-transform optical system has a cylindrical lens and an optical round cylinder installed for rotation about its axis, and hologram is made on reflecting material. EFFECT: enhanced reliability. 2 cl, 2 dwg
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