MULTILAYER PROTECTIVE OPTICAL DIFFRACTION-POLARIZATION DEVICE, A METHOD FOR MANUFACTURING THE SPECIFIED DEVICE, A PROTECTED PRODUCT CONTAINING THE SPECIFIED MULTILAYER PROTECTIVE OPTICAL DIFFRACTION-POLARIZATION DEVICE Russian patent published in 2021 - IPC B42D25/328 

FIELD: counterfeit protection.

SUBSTANCE: invention relates to the field of protection against counterfeiting valuable documents and concerns a multilayer protective optical diffraction-polarization device. The protective device contains two information-bearing elements. The first element is made in the form of at least one diffraction grating and/or a relief hologram with the first pictorial distribution of strokes and with the provision of microcracks located along the strokes. The second element is made in the form of at least one relief hologram with the second pictorial distribution of strokes. The second information-bearing element also contains a solid-state optical anisotropic layer based on the LCD material, made with the possibility of providing a picture of the spatial distribution of optical anisotropy while preserving the spatially-pictorial molecular-oriented ordered state of the LCD material, corresponding to the pattern of the distribution of stroke directions in at least one relief hologram of the opaque metallized diffraction region of the second element and at least one diffraction grating and/or relief hologram in the transparent demetallized optically anisotropic region of the first element.

EFFECT: increase in the accuracy of combining the elements of the device and its improved protective properties.

40 cl, 2 dwg