EP2637875A1

EP2637875A1 - Optically variable security device for a valuable document

Info

Publication number: EP2637875A1
Application number: EP11779701.9A
Authority: EP
Inventors: Julien Gillot; Xavier Borde
Original assignee: Oberthur Fiduciaire SAS
Current assignee: Oberthur Fiduciaire SAS
Priority date: 2010-11-10
Filing date: 2011-11-10
Publication date: 2013-09-18
Anticipated expiration: 2031-11-10
Also published as: CA2816384C; AU2011328044A1; FR2967089B1; WO2012062871A1; FR2967089A1; RU2013126541A; BR112013011614A2; AU2011328044B2; CN102463768A; CN102463768B; CA2816384A1; BR112013011614B1; ES2742778T3; RU2586812C2; EP2637875B1

Abstract

This security device comprises a security component (16) which comprises at least first (Z1) and second (Z2) zones that respectively produce first and second optical effects that each have at least two characteristic aspects in different observation configurations of the component (16). More precisely, the device comprises an image (18) which is at least partially in relief and is obtained by deformation of said component (16) and of said backing (10) to which said component (16) is affixed, this image (18) comprising at least a first and a second graphic element (20; 22) and extending at least partially in the two zones (Z1, Z2), and at least said first (20) and second (22) graphic elements of the image (18) are respectively revealed in the first (Z1) and second (Z2) zones by the appearance of at least one of the two aspects of the first and second optical effects, respectively.

Description

Optically variable security device for a document-value

The present invention relates to the technical field of security elements for securities documents, such as fiduciary documents or similar.

For the purposes of the invention, "fiduciary document" means all documents such as banknotes, checks, bank cards, used to transmit a sum of money.

"Assimilated document" means any document issued by an administration of the State to prove the identity of a person, of his rights to drive a vehicle, such as in particular the identity card, the passport, Permit to drive, etc. By this expression is also meant any document used to authenticate an object of value such as for example a label affixed to a luxury garment. We also hear any document used to authenticate the payment of a tax such as tax stamps.

In the field of securities documents, in particular banknotes, it is known to affix one or more security components of varied nature to protect these documents from counterfeiting.

To date, there is a strong demand for security documents comprising one or more security components easily identifiable with the naked eye while being particularly complex to reproduce, with a simple observation. Such security components are also referred to as "first level security".

Generally, such a security component produces an optical effect consisting of one or more optical animations, such as contrast sets, color changes, optical illusions, and so on.

Already known from the state of the art, in particular from the international application WO 01/036213, a security optical component comprising a film embossed with a first zone producing a rainbow effect according to a first orientation of the component relative to a lighting direction, and a second area producing a color effect of a first color in a first orientation of the component and a second color different for an orientation perpendicular to this first orientation.

The complexity of making such a component generally lies in a combination of various printing techniques that are difficult to reproduce with consumer copying equipment (scanner, laser or color ink jet printers, etc.) and / or standard printing equipment.

The state of the art can also be illustrated by the documents commented below.

EP 1 902 855 discloses a security document comprising a leaf area with a first region of a first color and a second region of a second color. Under these, see beyond these extends a security means such as a hologram. Thus, the hologram is partially visible through the first and second regions of different colors.

WO 2008/1 54541 relates to an authentication product such as a tag. A first part of this product has a intaglio printing inked with a latent image, while the second consists of a hologram.

No. 6,088,161 relates to a support having a surface with diffractive submicron relief structures. This consists of a series of parallel but non-contiguous nets. The diffraction effect is homogeneous in each net but different on contiguous nets.

Finally, WO 95/23350 describes a diffractive surface with elements of shiny appearance that "turn on" in turn according to the orientation of the observation. These elements are included in a hologram.

The object of the present invention is to provide a security device, for example of the first level, improving the properties of components already known while being very difficult to reproduce to ensure a great difficulty of counterfeiting.

For this purpose, the subject of the invention is, in particular, a security device comprising a support and, on the latter, a security component. for document-value comprising at least first and second zones respectively producing first and second optical effects each capable of presenting at least two characteristic aspects according to distinct observation configurations of the component, characterized in that it comprises an image at least partially in relief obtained by deformation of said component and said support on which said component is affixed, this image comprising at least a first and a second graphic element and extending at least partially in the two zones and at least partially said first and second graphic elements of the image are respectively revealed in the first and second zones with the appearance of at least one of the two aspects respectively of the first and second optical effects.

The image, the effects and the relief play a combined role. Thus, according to the invention, the image acts in synergy with the generated optical effects to produce a play of shadow and light, or even of colors, by concentrating, scattering or diffracting light from a light source.

The invention proposes to take advantage of the light variations obtained to scramble, reveal partially or entirely security information according to different configurations of observation of the component.

Thus, depending on the optical observation configuration of the component, one of the optical effects is preferentially combined with one of the parts of the image to produce an ignition or extinguishing effect of the part concerned.

In a preferred embodiment of the invention, the image is configured so that the first and second elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.

Thus, the appearance of a first aspect related to one of the optical effects allows the revelation of one of the graphic elements while the appearance of a second aspect allows its disappearance or dissimulation. By change of observation configuration, it is then possible to reveal or hide information contained for example in the graphic element in question. In a preferred embodiment of the invention, in the same observation configuration, the first graphic element is revealed and the second graphic element is hidden. The information contained in the graphic elements can thus be partially revealed in the same observation configuration.

The above-mentioned relief makes it possible to act in combination with the optical effects by locally modifying their optical reflection and diffusion properties.

For example, the relief is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency, etc.

Preferably, the depth of relief is between 5 and 150 micrometers and the rel ief is real ized by deform ation of su pportport (embossing).

A safety device according to the invention may further comprise one or other of the features according to which:

- one of the optical effects has at least three distinct characteristic aspects, a third graphic element of the image is revealed by the appearance of this third aspect in at least one of the two areas;

the relief is formed by printing of the dry stamp type;

the relief is formed by embossing during a heat transfer or cold transfer step of a marking film presenting the zones respectively producing first and second optical effects;

the image is formed at least partially by a single or multiple latent image;

- At least one of the optical effects acting in at least one preferred direction, the image comprises at least one frame oriented in a remarkable direction coinciding substantially with the preferred direction of action of the optical effect; the image comprises a background, the background has a frame oriented in a first direction remarkable and at least one of the graphic elements has a frame oriented in a second direction remarkable;

the frame of the bottom and the frame of the graphic element are oriented in the same remarkable direction and are offset relative to each other in a direction perpendicular to the remarkable direction;

the frames being periodic of identical period, the frames are shifted with respect to each other by at least half a period; the graphic element has at least two frames oriented in two distinct distinct directions;

the frames of the image are formed in relief;

at least one of the optical effects is generated by a diffractive grating having at least one preferred direction of diffraction;

at least one of the effects produces at least one rainbow characteristic;

at least one of the effects produces at least one metallized characteristic aspect (aluminum, copper, gold, etc.);

at least one of the effects produces a first color appearance of a first color and a second color appearance of a second color;

at least one of the effects is generated by a diffraction color subtraction filter;

at least one of the effects is generated by a volume hologram producing an animation effect capable of simulating a displacement of a part of the image according to an observation configuration of the component;

the part of the image able to move is positioned in register with another part of the image so that the two parts come to complement each other according to an orientation of the component;

the two zones of the structure together form a repeating pattern, for example arranged alternately.

The invention also relates to a document-value, such as a bank note comprising a security device according to the invention.

BRIEF DESCRIPTION OF THE FIGURES

Other characteristics and advantages of the invention will become apparent in the light of the description which follows, made with reference to the appended drawings in which:

FIG. 1 represents a document-value such as a bank note comprising a security component according to a first embodiment of the invention;

FIGS. 2A and 2B show the security component of FIG. 1 according to two different points of view;

Fig. 2C shows a detail view of part of the image;

FIGS. 3A to 3C show the security component according to a second embodiment of the invention according to three different points of view respectively;

Figure 3D shows a detail view of part of the image;

FIG. 4 represents the security component according to a third embodiment of the invention; and FIGS. 5A to 5C show the security component according to a fourth embodiment of the invention according to three different points of view respectively. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION FIG. 1 shows a document-value. This document value is designated by the general reference 10. In the example described, the document-value 10 is a banknote. Alternatively, the document 10 may be a passport, a driver's license or any other document that may require security.

The document 10 comprises a support 12, made of a material comprising for example essentially paper, plastic or a mixture of both. Of course, the invention is not limited to a particular material for the support. The support material may also have a multilayer structure, if necessary comprising several layers laminated together.

As illustrated in Figure 1, the document 10 further comprises a security component 16 according to a first embodiment of the invention. The component 16 according to this first embodiment is illustrated in detail in FIGS. 2A and 2B.

According to the invention, the security component 16 comprises first Z1 and second Z2 zones respectively producing first and second optical effects. The first and second optical effects may each have at least two characteristic aspects according to distinct observation configurations of the component 16. In the example illustrated, the two aspects are well differentiated, which makes it easy for an observer to distinguish them. .

Within the meaning of the invention, an observation configuration is defined by a set of observation parameters such as, for example, an orientation of the component 16 with respect to an observation direction, a relative position of a light source , the size of the source, the emission wavelengths of the source, its transmission power, etc. Thus, the first effect for example has a first aspect according to first and second observation configurations (FIG. 2A) and a second aspect according to a third observation configuration (FIG. 2B). For example, the first and second configurations respectively correspond to observation directions 24A, 24B angularly separated by a quarter of a turn, for example inclined at an angle of 45 ° relative to the plane comprising the component 16. The third configuration corresponds to a shading observation schematized by reference 24C.

In the example described and illustrated by the figures, the optical effects vary in particular according to predefined orientations of the component 1 6 relative to a light source S diagrammatically represented in the figures by a sun and more precisely with respect to a direction of illumination ( not shown in the figures).

Of course, the light source S can emit a directional or diffuse beam. Although the invention is not limited thereto, it is particularly well suited to be used with a diffuse visible (eg white) polychromatic light illuminating the security component.

Of course, alternatively, the light source S may comprise a spectrum of wavelength outside the visible range (conventionally defined between 0.4 and 0.7 micrometers), for example in the ultraviolet spectrum of length spectrum. wave less than 0.4 micrometers or the infrared range of wavelength spectrum beyond 0.7 micrometers. In this case, it is usually necessary to use a specific detector to observe the optical security.

For example, the optical effects each act in at least one preferred direction, the orientation of which depends for example on the main illumination direction of the source S.

In the example described, the first optical effect associated with zone Z1 is generated by a diffractive grating producing at least a first rainbow characteristic appearance according to at least one grazing observation direction.

24C (FIG. 2B) and at least one second non-diffractive aspect, for example dull gray, according to at least one other direction of observation, for example in the direction 24A or 24B (Figure 2A).

Thus, preferably, the first optical effect has at least one preferred direction of action which is linked, in the case of a diffractive grating, notably to the direction of a diffraction order of this grating. The observation direction 24C is determined in this example, in particular by the lighting direction of the component 16 and for example coincides substantially with a direction of a diffraction order of the grating.

Thus, the diffractive grating preferably has at least one preferred direction of diffraction which determines the observation direction 24A and 24B of the rainbow aspect of the first effect. This diffraction direction is itself defined for example with respect to the reference illumination direction of the source S.

In a manner known per se, a diffractive grating is generally formed by a regular arrangement of identical diffracting elements. Each of the elements diffracts the incident light in all directions and each diffracted beam in one direction interferes with the other diffracting beams in the same direction. The network makes it possible to produce a chromatic dispersion at the origin of the rainbow appearance observable according to at least one observation direction.

In the example described, the network comprises a plurality of lines extending in a longitudinal direction which determines the preferred direction of diffraction.

In this first embodiment, the second effect associated with the zone Z2 produces a first color appearance of a first observable color according to one of the configurations and a second color aspect of a second color observable according to the other of the configurations. In the example described, the first color is green and the second color is red.

Preferably, the second optical effect associated with the second zone Z2 is generated by a diffraction color subtraction filter. This second optical effect is produced for example by a diffraction grating structure having predefined network parameters so that the diffractive structure is configured to separate an incident polychromatic light into at least one pair of angularly adjacent adjacent reflected beams and contrasting colors.

In the case of this second optical effect with a color change, the diffractive grating preferably has two preferred directions of action corresponding to each of the contrasting colors. In addition, the red and green color beams are preferably spaced angularly, for example at a 90 ° angle.

In other words, to observe the color change of the zone Z2, the component 16 must be turned by a quarter of a turn, or a rotation of a quarter turn of the observation direction 24A of the component 16 towards the observation direction 24B (FIG. 2A).

In addition, the second optical effect has, for example, a third non-diffractive aspect in a third observation configuration corresponding to the shading observation 24C (FIG. 2B).

By network parameter is meant, for example, a number of lines per unit length, a physical profile of the network structure, a line orientation of the network, etc.

According to the invention, the security component 16 comprises an image 18 which extends at least partially in the two zones Z1 and Z2.

Throughout the application, the term "relief image obtained by deformation of the component and the support on which said component is affixed", a graphical representation formed of one or more graphic elements which, in the latter case , can be separated from each other.

In this example, the component 16 has a generally parallelepipedal shape and the zones Z1 and Z2 extend over the entire surface of the component 16. However, in a variant, the zones Z1 and Z2 may occupy only partially the surface of the component 16 .

In the examples described in this application, the first and second zones Z1 and Z2 are arranged between them to form an alternating pattern, for example oblique hatching as illustrated in FIGS. different figures. In the example illustrated in the figures, the zones Z1 and Z2 are adjacent. However, in a variant not shown in the figures, the zones Z1 and Z2 may be spatially spaced or overlap partially. Of course, in another variant, the arrangement of zones Z1 and Z2 can be varied: for example, the zones can form concentric disks, nestings of geometric shapes, etc.

According to the invention, the image 18 is structurally configured to act with the first and second optical effects. Thus, in accordance with the invention, the image 18 acts in such a way that at least the first 20 and second 22 graphic elements of the image 18 are respectively revealed in the first and second zones Z1 and Z2. The revelation of the elements 20 and 22 is linked in particular with the appearance of at least one of the two aspects respectively of the first and second optical effects.

For example, graphical elements 20 or 22 include alphanumeric characters. In a non-illustrated variant, the graphic elements include micro-lettering, geometric figures, drawings, portraits, etc.

In the example described, to act with the optical effects, the image 18 is formed at least partially in relief. Preferably, the relief of the image 18 is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency, etc.

In these conditions, this relief, in addition to being perceived visually, is also visually, which reinforces the security of the component.

For example, the relief is formed by dry stamp printing. For this embossing, it is possible to use, for example, a conventional inkless intaglio printing process for dry embossing.

Thus, the deformation of the surface by means of a plate engraved with different frames, different lines, with reserve (unframed areas) or latent image (perpendicular frame for example to the overall background frame) makes it possible to reflect light rays incidentally. very different than if they hit a plan element. Thanks to these deformations, we manage to make the zones Z1 and Z2 more mate (less brilliant) by the implementation of the "dry stamp" and thus to reinforce the extinguishing / lighting effect of the optical effects in an effect synergy.

Preferably, the image 18 comprises at least one frame oriented in a remarkable direction chosen according to at least one of the preferred directions of action of the optical effect considered to obtain an optical synergy. For example, the remarkable direction substantially coincides with at least one of the preferred directions of the optical effect considered.

Those skilled in the art will easily find a relative orientation of the frame of the image with respect to one of the preferred directions of action of the optical effect considered to offer an optimal optical synergy.

For example, the image 18 is formed at least partially by a latent image, preferably of simple type. The latent image is arranged in register with the first optical effect for example. The orientation of the screened part is for example 90 ° with respect to the frame of the diffractive grating producing the first optical effect or possibly parallel to this frame.

In the first embodiment illustrated by FIGS. 2A and 2B, the image 18 is formed by a positive-negative effect type relief. For example, the image 18 is generated by an engraved engraving plate (not shown) or an embossing plate or other engraved tool. Alternatively, the image may comprise a non-rasterized background and at least one of the graphic elements may have at least one raster part oriented in a remarkable direction.

In the example, the background or the background of the image 18 is framed while the graphic elements 20 and 22 are unframed as shown in FIG. 2C. To form this image 18, the etched plate comprises a screen portion to form the background and a non-screened portion of substantially planar surface to form the graphic elements. The background frame defines a remarkable orientation direction of this frame corresponding to the orientation of the lines 23 of the frame. In this first embodiment, the first graphic element 20 forms a first character string "TECH" extending in the first zone Z1 and the second graphic element 22 forms a second character string "DCBE" extending in the second zone Z2.

The back ground is formed for example by a plurality of engraved lines, and is as illustrated in detail in FIG. 2C and the remarkable direction of this frame corresponds to the orientation of the lines 23. Preferably, this remarkable direction is aligned substantially with the preferred direction of action of the optical effect considered.

According to a first orientation of the component 16 illustrated in FIG. 2A, the first zone Z1 has a non diffractive dull appearance while the second zone Z2 has a colored appearance of a first color, for example green. The first character string 20 does not appear in this orientation while the second string 22 is revealed by the color appearance of the second optical effect and gives the impression of lighting.

When the observer rotates a quarter of a turn in his plane as illustrated in FIG. 2A, in the direction 24B, the positions of the source S and the component 16 remaining unchanged, the first zone Z1 retains its dull, non-diffracting aspect. . On the other hand, the second zone Z2 changes color very markedly, for example from green to red so the characters "DCBE" remain visible but change color from green to red.

When the direction of observation, corresponding for example in grazing observation 24C, coincides with one of the preferred directions of the first optical effect, the background weave acts in combination with the first optical effect (Figure 2B). The first optical effect produced in this direction of grazing observation, a rainbow aspect which will have the effect of revealing the first character string "TECH" (FIG. 2B) thanks to the particular relief structure of the picture 18 in the Z1 area.

The first graphic element 20 of the image 18 then becomes visible by the action of the raster background during the appearance of the rainbow appearance while the second graphical element 22 of the image 18 is hardly perceptible to the naked eye or almost invisible.

Preferably, the image 18 is configured so that the first 20 and second 22 elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.

Thus, in this first embodiment, the first element 20 is scrambled with the appearance of the non-diffractive appearance of the first optical effect and the same is true of the second element 22 which is also scrambled with the extinction of the color the second optical effect.

Moreover, in this first embodiment, in the same observation configuration, for example that illustrated in FIG. 2B, the first graphic element 20 is revealed and the second graphic element 22 is hidden, contrary to the observation configurations illustrated on FIG. Figure 2A.

FIGS. 3A to 3D show an optical component 16 according to a second embodiment. In these figures, the elements similar to Figures 1 to 2C bear identical references.

In this second embodiment, the image 18 is a multiple latent image. For example, the image 18 includes a bottom 28 having a frame oriented in a first direction (FIG. 3D).

In addition, preferably, one of the graphic elements has at least one frame oriented in a remarkable direction. Thus, at least one of the graphic elements 20 or 22 has a frame oriented in a second remarkable direction 32 distinct from the first direction 30.

In a variant not illustrated in the figures, the frame of the bottom 28 and the frame of the graphic element 20 or 22 are oriented in the same remarkable direction and are offset relative to each other in a direction substantially transverse to this remarkable direction. For example, the frames are periodic of the same period and the offset between the two frames corresponds to half a period. In the example illustrated in FIG. 3D, the graphic element 22 comprises a first raster portion 22A oriented in a second direction 32 remarkable distinct from the first 30 and a second portion 22B raster oriented in a third remarkable direction 34 distinct from the first 30 and second 32 remarkable directions. In addition, the second 32 and third 34 directions are perpendicular to each other.

For example, the second graphical element 22 includes a first character string "DCBE" and a second character string "TECH". Thus, in this embodiment, the bottom 28 of the image 18 has a frame oriented in a first remarkable direction 30, the first chain "DCBE" has a frame oriented in the second remarkable direction 32 and the second chain "TECH" has a frame oriented in the third remarkable direction 34.

In addition, preferably, the second optical effect associated with the zone Z2 acts in at least two preferred directions. These directions are for example spaced angularly from each other by a quarter turn.

For example, in the first observation configuration illustrated in FIG. 3A, defined in particular by an observation direction 26A, the first optical effect of the zone Z1 has a rainbow appearance and the second optical effect of the zone Z2 has a dull non-diffracting appearance.

In this configuration, the first graphical element "DCBE" of the first zone Z1 is revealed by the appearance of the rainbow aspect of the first optical effect. For example, the first graphic element "DCBE" has a frame oriented in a remarkable direction corresponding to one of the preferred directions of the second optical effect. On the other hand, the second graphic element 22 is concealed by appearance of the non diffractive dull aspect of the second optical effect.

In a second observation configuration illustrated in FIG. 3B, in particular defined by the direction 26B, the second optical effect has a first color appearance of a first color, for example green. The first character string "DCBE" of the graphic element 22 having a frame oriented in the second remarkable direction 32 coinciding substantially with the first preferred direction of action of the second optical effect is revealed. The other character string "TECH" of the same graphical element 22 is on the other hand scrambled because it has a frame oriented in the third remarkable direction 34 which does not coincide with the preferred direction of the second optical effect.

Finally, in a third observation configuration illustrated in FIG. 3C, in particular defined by the observation direction 26C, the second optical effect has a second colored appearance of a second color, for example red. The first graphic element 20 of the image 18 present in the zone Z1 is still scrambled because the first optical effect always has in this direction of observation a dull non-diffracting aspect. On the other hand, in this configuration, the second character string "TECH" of the second graphic element 22 is revealed by the red coloration of the second optical effect.

There is shown a third embodiment in FIG. 4.

In this third embodiment, the image 18 comprises a third graphic element 28. This third graphic element 28 is printed for example in offset, flexographic, screen printing, letterpress, intaglio with or without ink, etc. The third graphic element 28 is invariant regardless of the observation configuration of the component 16. Preferably, this third graphic element 28 is arranged in registration with respect to the other graphic elements so that it complements the other elements. graphs 20 or 22 for example to provide information. For example, in this figure, there is shown the graphic element 22 and the graphic element 28 positioned in register with respect to one another in the second zone Z2.

There is shown a fourth embodiment of the invention in FIGS. 5A to 5C. In this fourth embodiment, the first zone Z1 has, for example, one of the optical effects described above, for example the first optical effect. Alternatively, the first zone Z1 may comprise the second optical effect described above.

In this embodiment, the second zone Z2 generates a volume hologram producing an animation effect capable of simulating a displacement of a part of the image according to an orientation of the component 16.

Thus, as illustrated in FIG. 5A, according to a first orientation, the first graphic element 20 appears and the character string "TECH" is revealed for example by the rainbow aspect of the first optical effect.

According to a second orientation of the component 16 illustrated in FIG. 5B, the second graphic element 22 is revealed. This second graphic element 22 gives the impression of moving by varying the inclination of the component 16 according to the arrows indicated in the figure.

Preferably, as shown in FIG. 5C, the part of the image able to move is positioned in register with another part of the image so that the two parts come to complement each other according to a component orientation. Thus, in this orientation, the graphic element 20 is simultaneously revealed with the graphic element 22 and the two elements are complemented by a slight inclination of the component 16.

The main aspects of operation of a component according to the invention will now be described with reference for example to the first embodiment of the invention illustrated in FIGS. 2A to 2C.

An observer wishes to authenticate the document-value, that is to say the banknote 10. For this, it causes a rotation of the banknote 10 so as to observe various aspects produced by the optical effects. Depending on the appearance generated by the optical effects, graphic elements appear or disappear with the movements caused by the observer. The observer then quickly authenticates the document-value all the more easily as the appearance changes of the optical effects are well marked. Moreover, because of the complexity of implementation, such a document-value is difficult to falsify.

Although the invention has been described by way of example with reference to the accompanying figures, it is understood that many modifications may come to the mind of those skilled in the art without departing from the scope of the present invention. Other optical effects may be implemented within the scope of this invention. Thus, at least one of the effects can produce a metallized characteristic appearance, for example of alumina, copper or gold type.

Claims

1. Document-value security device (1 0) comprising a support (12) and, on the latter, a security component (16) comprising at least first (Z1) and second (Z2) zones respectively producing first and second optical effects each having at least two characteristic aspects according to distinct observation configurations of the component (16), characterized in that it comprises an image (18) at least partially in relief obtained by deformation of said component (16) and said support (10) on which said component (16) is affixed, said image comprising at least first and second graphic elements (20; 22), and extending at least partially in both zones (Z1, Z2) and at least said first (20) and second (22) graphic elements of the image (18) are respectively revealed in the first (Z1) and second (Z2) zones with the appearance of at least one of the two aspects respectively first and second optical effects.

2. Device according to the preceding claim, wherein the image (18) is configured so that the first (20) and second (22) elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.

3. Device according to the preceding claim, wherein, in the same observation configuration, the first graphic element (20) is revealed and the second graphic element (22) is concealed.

4. Apparatus according to any one of the preceding claims, wherein one of the optical effects has at least three distinct characteristic aspects, a third graphic element of the image (18) is revealed by the appearance of this third aspect in at least one of the two zones (Z1, 72).

5. Device according to any one of the preceding claims, wherein the image (18) is formed at least partially in relief, without ink.

6. Device according to the preceding claim, wherein the relief of the image (18) is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency.

7. Device according to claim 5 or 6, wherein the relief is formed by printing dry stamp type.

8. Device according to any one of the preceding claims, wherein the image (18) is formed at least partially by a latent image of single or multiple type.

9. Device according to any one of the preceding claims, wherein, at least one of the optical effects acting in at least one preferred direction, the image (18) comprises at least one frame oriented in a remarkable direction chosen relative to to the preferred direction of action of the optical effect to obtain an optical synergy.

Apparatus according to any one of the preceding claims, wherein the image (18) comprises a bottom (28), the bottom (28) has a frame oriented in a first direction (30) and at least one graphic elements (22, 22A, 22B) have at least one frame oriented in a second remarkable direction (32, 34).

1 1. A device according to any one of the preceding claims, wherein the graphic element (22, 22A, 22B) has at least two fields oriented in two distinct, distinct directions.

12. Device according to any one of claims 9 to 11, wherein the frames of the image (18) are formed in relief.

13. A device according to any one of the preceding embodiments, wherein at least one of the optical effects is generated by a diffractive grating having at least one preferred direction of diffraction, corresponding, for example to a diffraction order of the network.

14. Device according to the preceding claim, wherein at least one of the effects produces at least one rainbow characteristic appearance.

15. A device according to any one of the preceding claims, wherein at least one of the effects produces a first aspect. colored of a first color and a second colored appearance of a second color.

Apparatus according to any one of the preceding claims, wherein at least one of the effects is generated by a diffraction color subtraction filter.

Device according to any one of the preceding claims, in which at least one of the effects is generated by a volume hologram producing an animation effect capable of simulating a displacement of a part of the image (18) by according to an observation configuration of the component (16).

18. Device according to the preceding claim, wherein the portion of the image (18) able to move is positioned in register with another part of the image (18) so that the two parts come complete each other between them according to an orientation of the component (16).

19. Device according to any one of the preceding claims, wherein the two zones (Z1, Z2) together form a pattern, for example the two zones are arranged alternately.

20. Device according to one of the preceding claims, characterized in that the relief of the image (18) is formed by embossing during a heat transfer step or cold a marking film having said zones (Z1 Z2) respectively producing said optical effects.

21. Document-value (10), such as a banknote, characterized in that it incorporates a security device according to any one of the preceding claims.