LAMELLAR STRUCTURE WITH LENS-LIKE EFFECT CREATING STRUCTURE HAVING OPTICAL DIFFRACTION PROPERTY Russian patent published in 2008 - IPC G02B5/18 G06K19/16 B44F1/04 

FIELD: optics.

SUBSTANCE: lamellar structure, used especially for transfer or laminated films, has at least two layers of material disposed one behind other, The structures, turned to observer, have to be transparent or semitransparent. Border surface is formed between layers, which surface is provided at least one part of surface with lens-like structure having property of optical diffraction, which creates reduction of magnification effect. Lens-like structure has to be structure of diffraction pattern which differs continuously at part of surface relatively its frequency of diffraction grating. Structure is made either in form of binary structure or in such a way that some sides of grooves of diffraction grating pass in parallel to each other and approximately in parallel to perpendicular line to main plane of border layer. Angle of other two sides of grooves in relation to perpendicular to main plane of border layer in relation to perpendicular to main plane of border plane essentially changes continuously at part of surface. Depth of grating of lens structures is 10 microns maximum. Efficiency and lightness of created effect and improvement in color effects is provided comparing to structures formed by method of holography.

EFFECT: improved precision; wider variety of construction shapes; higher efficiency.

25 cl, 3 dwg