Information card

 

(57) Abstract:

Usage: protection, securities, identity, credit, cheque and other information cards from copying and counterfeiting. The inventive information card includes a substrate, a micro-relief and applied to the microrelief of a transparent layer with a flat outer surface. The transparent layer is made in the form of a mosaic of areas with different refractive indices. In some of the areas he made in the form of figures, inscriptions, drawings and other images, in which he has a refractive index different from the refractive index of the transparent areas of the layer deposited near or around the above-mentioned images. Metallized reflective layer is made with a microrelief or applied on the skin, performed on the substrate, and located between the substrate and the transparent layer. The directional dispersion of white light by the micro-relief and a transparent layer allows you to observe the directions of observation , different colors of shapes, signatures, drawings and other images transparent layer on the background of other colors neighboring areas transparent layers having different refractive indices. 1 C.p. f-crystals, 3 ill.

The image copying and counterfeiting, as well as advertising, computer science, applied and decorative art.

Known holographic micro-relief, executed in the form of a sinusoidal profile, covered with a metal reflective layer [1]. Lack of microrelief is that to change the diffraction characteristics of different areas of the microrelief need to make changes to the characteristics of the microrelief in these areas.

Known information card [2], containing a substrate, a metallic reflective layer and a transparent layer and a reflective layer formed of the skin. It is formed in the form of alternating with a period of 1-10 μm recesses and protrusions size of 0.3 to 3.0 μm. The disadvantage is that to create shapes, text, picture and other images information cards, on the reflective layer or on the substrate formed the relief, i.e. large-scale protrusions and depressions or large area with light reflecting layer or without it.

Known optical device containing a wafer (substrate), the microrelief and a transparent layer, deposited on the surface micro-relief flat outer surface [3] is a prototype. Plate-substrate the neck, different from the refractive index of the plate. The plate can be made reflecting light when applied to the micro-reflecting layer. The microrelief is made in the form of a phase grating with a rectangular profile of stroke and the period of the order of 1-10 microns. The lack of plate is that to create a new diffraction characteristics of different areas of the plate, in these areas, change the orientation and period of the strokes of the diffraction grating, i.e., the direction of microrelief and characteristics of the microrelief, and a transparent layer with a flat outer surface is applied to the copy protection, if this is different from the plate of refractive index transparent layer is carried out to save the diffraction properties of the plate.

The objective of the invention is to improve the quality of the information card by increasing its information capacity, i.e., increase its protection against copying and counterfeiting. The technical result of this task is to create a color effect of the emergence of the information content of the card when observing at right angles to the surface of the information card. When you change the angle information of the content CT is tereasa pad, the microrelief and a transparent layer deposited on the micro-relief flat outer surface, contains a transparent layer made in some areas in the figures, inscriptions, drawings and other images, in which he has a refractive index different from the refractive indices of the neighboring or surrounding areas transparent layer, i.e., contains a transparent layer in the form of a mosaic of areas with different refractive indices.

The invention consists also in the fact that the information card contains a metallized reflective layer made with microrelief or applied on the skin, performed on the substrate, which is located between the substrate and the transparent layer.

The substrate is designed to run on it microrelief or fastening on her metallized reflective layer made with microrelief. A transparent layer deposited on the surface to protect the surface from copying and counterfeiting, as well as other physical and chemical effects. A transparent layer deposited on the surface of the information card with the micro-relief in the form of figures, inscriptions, drawings and other flat surfaces images, is invisible in nanesennyi on the surface of the information card with microrelief, near or around the figures, inscriptions, drawings and other flat surface images with a refractive index that is different from their refractive index, allows the eye of the observer to see these figures, inscriptions, drawings in the diffraction orders of the microrelief different from zero, i.e., to see the information on the card in a single color or multiple colors on a background of another color or several other colors.

The microrelief is a diffraction grating, which disperses feed it aimed solar (white) light. A transparent layer on the surface micro-relief flat external surface is a diffraction grating transmissive micro inscribed in the microrelief of the substrate or the micro reflective layer. The diffraction characteristics of the transparent layer, in addition to the characteristics of the micro-relief, also depend on the refractive index of the transparent layer, with a transparent layer modifies the diffraction characteristics of the micro-relief of the substrate or surface reflective layer. On the surface microrelief of the transparent layer with different refractive indices create areas with different diffraction characteristic is geometricheskoi optics (angle of incidence equals the angle of reflection, i.e. in the zero order diffraction) the information content of the card is not visible, because no change in direction of light (i.e., diffraction) no and all areas reflect light equally. But in other areas (non-zero orders of diffraction) microrelief decomposes white light into a spectrum of colors. While the field of information cards with different refractive index transparent layer decompose white light into a spectrum of colors in different ways. At each point on the surface of the information card, the eye of the observer sees only one color, which varies sharply at the boundary of regions with different refractive index transparent layer. I.e. these areas are illuminated with different colors and border change color. This allows you to see the content of the information card. The fact that different areas of the transparent layer have different refractive index, makes up and fake information cards, as different sets of refractive indices increase its information capacity.

In Fig. 1 shows an information card with a transparent substrate and a sinusoidal profile of the microrelief of Fig.2 - information card with sotoo the United reflective layer.

In Fig. 1, 2, 3, depicts the directional scattering white (solar) light microrelief information cards in various areas of the transparent layer with different refractive indices. Here 1 is the direction of the white light on the information card, 2 - base, 3-micro, 4 - area transparent layer with the same refractive index and a flat outer surface, 5 - area transparent layer with a different refractive index and a flat outer surface, 6 - reflective layer deposited on the surface microrelief, 7 - reflective layer made from a micro, 8 - layer of glue. In Fig.1 profile of the microrelief sine wave, Fig. 2 microrelief has a rectangular profile, in Fig.3 microrelief has a triangular profile. In the drawings indicate the direction of light scattering in various areas of the transparent layer. Solid line shows the direction of propagation of the light in the zero order diffraction when mirroring or direct passing, which is not visible content information cards. The dotted lines show the extreme directions of propagation of different colors of light in a diffraction order other than zero.) - Rev. in a lower direction red light, other colors are in between. The designations shown the direction of observation of the colors of the surface of the information card.

There is an information card as follows. White light from the sun or lamp falls on the information card and dirigeret on the microrelief rotting in the color range in orders of diffraction different from zero. Passing through the transparent layer, deposited on the surface of the microrelief, the light feels more diffraction-dependent refractive index transparent layer. In the transparent areas of the layer with different refractive indices in one direction observations apply different colors of diffracted light. So in Fig.1 in the direction of the Central region information cards visible green, and two extreme areas visible violet. In Fig. 2 in the direction of the Central region is visible violet and extreme areas visible red. In Fig. 3 in the direction of the Central region is visible orange, and the outer region visible green.

The proposed solution creates a new level of protection and allows to improve the quality of information cards by increasing its info is the refractive index of information fields, i.e. create a color effect of the emergence of the information content of the card when observing at right angles to the surface of the information card. In this case, modifying the angle of observation, the information on the card changes its color.

Literature

1. Optical holography./ Edited Caulfield, M., Mir, 1982, S. 202, T. 1.

2. Patent USSR N 1799331, class B 44 F 1/00, from 25.12.90, Gulyakov, Meters and other Information card.

3. RF patent N 2004003, CL G 02 B 5/18, from 02.03.92, agesin C. F. and other Optical device to create light effects.

1. Information card containing the substrate, the micro-relief and applied to the microrelief of a transparent layer with a flat outer surface, wherein the transparent layer is made in the form of a mosaic of areas with different refractive indices, in some of the areas he made in the form of figures, inscriptions, drawings and other images, in which he has a refractive index different from the refractive index of the transparent areas of the layer deposited near or around the above images.

2. Card under item 1, characterized in that it contains a metallic reflective layer made from m acronym layer.

 

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