DE212014000112U1 - Secure identification component - Google Patents

Abstract

Multilayer, secure identification component (10) comprising a transparency region (5) and at the transparency region: - a personalizable layer (22) sensitive to laser marking and intended to receive identification information (6), - a semi-reflective element ( 4) comprising a diffractive optical component in the zeroth order of diffraction of the DID type and disposed on the back side (V) of the component relative to the personalisable layer (22) such that the identification information (6) is reflected in front of the Component and in transmission at the same time on the front and on the back of the component can be checked.

Description

FIELD OF THE INVENTION

The present invention relates to the field of security marking. In particular, it relates to a secure identification component having a transparency window and identification information (tag) in this transparency window. The secure identification component is for example a plastic or composite component, for example a card of the type of identity card, credit card or driver's license or a plastic sheet for a passport.

STATE OF THE ART

It is common in the identification components of the type of cards to have a good reading contrast to perform an identification of the identification elements on an opaque background and advantageously on a light background, this bright background is obtained by inserting an opaque layer, such as a white layer. The tag has identification information, such as alphanumeric characters or a photo. The marking is made, for example, by laser engraving in a layer of suitable material or by printing.

In order to carry out a check on the front and back of the components, secure identification components have appeared which have a transparency window on which the identification information is marked. The 1 thus provides an example of an identity card 100 This is a transparency window 101 and a mark in the form of a photo 102 , having. The readability of the identification information engraved on the window is greatly reduced due to the loss of contrast between the black of the engraved information and the color of the background, which appears dark at the transparency area due to the lack of the opaque layer.

The patent application WO 2013 / 038361A1 describes a card of the type of identity card, which has a multi-layered structure and transmission windows on both sides of a substrate made of thermoplastic material. At each of the transmission windows, a patch or insert is placed, such as a patch of paper, on which a security element is placed, allowing control on each of the 2 sides of the card.

The patent application EP 1 935 663 also describes a multilayer card with a transparency window on which personalized information can be engraved by laser engraving. The technique described in this document is to recognize the information engraved with the laser by giving it a different aspect depending on the observation side, in particular by using a developer and a filter on both sides of the layer containing the Information is inserted, these elements react to specific wavelengths.

The present invention provides a secure identification component, wherein the identification data at the transparency region can be inspected in reflection with a higher contrast to the components described in the prior art, being in transmission at the same time on the front and on the back the component are visible.

BRIEF SUMMARY OF THE INVENTION

• – eine personalisierbare Schicht, die dazu bestimmt ist, Identifikationsinformationen zu empfangen,
• – ein halbreflektierendes Element, das auf der Rückseite der Komponente relativ zu der personalisierbaren Schicht derart angeordnet ist, dass die Identifikationsinformationen in Reflexion auf der Vorderseite der Komponente und in Transmission zugleich auf der Vorder- und auf der Rückseite der Komponente überprüft werden können.

The invention relates to a multilayer, secure identification component comprising a transparency region and to the transparency region:

• A personalizable layer intended to receive identification information,
• A semi-reflective element disposed on the back side of the component relative to the personalisable layer such that the identification information can be checked in reflection on the front of the component and in transmission at the same time on the front and back of the component.

The identification component thus described makes it possible to enhance the reading contrast of the identification information when observed in reflection in the daylight and also allows control in transmission of the same information on the two sides of the component by means of a single semi-reflective element.

Advantageously, the properties of the semi-reflective element can also be observed on the back of the component in reflection or in diffraction.

In one embodiment, the semi-reflective element has additional properties for securing the document, such as color effects that are variable by azimuthal rotation of the component.

Advantageously, the semi-reflective element is between two transparent layers encapsulated. In the present specification, a layer is called transparent if its transmission at normal incidence is higher than 60%, preferably higher than 80%.

Advantageously, the thickness of the semi-reflective element is less than 15 microns, preferably less than 7 microns.

The dimensions of the semi-reflective element are not related to the dimension of the transparency region: the semi-reflective element may have smaller, larger or the same dimensions.

According to one embodiment, the transparency range has a transmission at normal incidence in the visible range of more than 60%, preferably more than 80%. In one embodiment, the semi-reflective element allows reflection in the visible range at a given angle of greater than 20%, preferably greater than 40%, preferably greater than 60%.

The semi-reflective element may be suitable for observation in mirror reflection (in the zeroth order of diffraction) or for observation at a given angle of inclination corresponding, for example, to a diffraction order in the case of a diffractive element.

In one embodiment, the semi-reflective element comprises an optical index layer of the high index or thin metallization layer or partial metallization layer type.

In one embodiment, the semi-reflective element comprises a diffractive element, such as a diffraction grating, and more particularly an asymmetric grating, and preferably an achromatic asymmetric grating which focuses the diffracted light in the zeroth diffraction order.

In one embodiment, the semi-reflective element is a phase hologram (or volume hologram), for example, recorded in a photopolymer layer; such an element has a diffraction efficiency under the diffraction conditions of over 60% and advantageously over 80%, allowing maximum contrast with the identification information.

According to one embodiment, the semi-reflective element has a diffractive optical component in the zeroth DID diffraction order.

In one embodiment, the semi-reflective element comprises two DID type components that form complementary patterns.

Advantageously, the layer intended to receive identification information is a layer which is sensitive to laser marking, for example a polycarbonate layer.

Also disclosed in the present document is a method for producing a multilayer, secure identification component as described above.

• – die Anordnung von Schichten einen Transparenzbereich aufweist,
• – eine der Schichten eine personalisierbare Schicht ist, die dazu bestimmt ist, Identifikationsinformationen an dem Transparenzbereich zu empfangen; und eine der Schichten ein halbreflektierendes Element an dem Transparenzbereich aufweist, sodass das halbreflektierende Element auf der Rückseite der Komponente relativ zu der personalisierbaren Schicht angeordnet ist.

The method comprises stacking an array of layers, wherein:

• The arrangement of layers has a transparency region,
• One of the layers is a personalisable layer intended to receive identification information at the transparency area; and one of the layers has a semi-reflective element on the transparency region such that the semi-reflective element is disposed on the backside of the component relative to the personalisable layer.

According to a variant of the method, the layer which carries the semi-reflective element is also the personalisable layer which is intended to receive identification information.

According to a variant of the method, the layer which is intended to receive identification information is a layer that is sensitive to laser marking.

According to a variant, the method further comprises the entry of identification data, for example by printing or by laser marking.

BRIEF DESCRIPTION OF THE FIGURES

Other features and advantages of the invention will be better understood upon reading the following description, which is illustrated by the following figures:

1 Fig. 13 is a view of a prior art secured card type identification component;

2 is an example of a secure identification component according to the invention (sectional view);

3 to 5 are examples of secure identification components according to the invention (sectional view);

6A . 6B are views of an identification component observed from the front and the back (observation in reflection);

7A . 7B are views of an identification component observed from the front and the back (observation in transmission);

8A . 8B are views of an identification component observed from the front and the back (observation in reflection) with a DID type semi-reflecting element;

9 is an example of an identification component secured by the method of the invention.

In the figures, like elements are designated by like reference numerals.

DETAILED DESCRIPTION

The figures are shown for purposes of illustration and are not representative of either the scales or the shapes of the actual components.

The 2 describes a first example of a secure identification component 10 according to the invention, for example, a multi-layer card of the type of identity card, which has a front (R) and a back (V). It has an arrangement of layers 2 of which a customizable layer contains a set of identification data 6 carries (which are indicated in the figure with dashed lines). In the 2 the arrangement of the layers after stacking and fusing is shown so that the layers appear like a homogeneous block. The layers are for example made of polycarbonate, wherein one of the layers is a personalisable layer, which is carbon-loaded, for example, in order to be engraved by laser after stacking and fusing of the layers. The secured component 10 also has a semi-reflective element 4 on that in a transparency area 5 the arrangement of the layers is arranged on the back relative to the personalisable layer. The semi-reflective element is advantageously encapsulated between two layers.

The semi-reflective element 4 is, for example, a semi-reflective layer which can be observed in direct reflection, for example, a layer having an optical index different from that of the adjacent layers, for example, a high refractive index layer; alternatively, the semi-reflective layer may be a thin metallization layer or a partial metallization layer (ie, discontinuous in a dot matrix, for example).

The semi-reflective element 4 may also be a diffractive element that can be observed at a diffraction angle other than the specular reflection angle, such as a diffraction grating, and particularly an asymmetric grating, and particularly an achromatic asymmetric grating that focuses the diffracted light in the zeroth diffraction order.

In one embodiment, the semi-reflective element 4 a photopolymer layer in which a phase grating (or volume hologram) is recorded, which has the peculiarity of having a high diffraction efficiency (> 60% and> 80%, respectively).

In one embodiment, the semi-reflective element is 4 a diffractive optical component in the zeroth diffraction order of the type DID after the abbreviation of the English term "Diffractive Identification Device" and as in the application of the patent FR 2 838 202 described in the name of the Applicant. Such a component comprises a layer of transparent high refractive index dielectric material encapsulated between two low index layers and patterned to form a sub-wavelength grating. Such a component behaves like a structured waveguide, which makes it possible to generate resonances of guided modes with different wavelengths as a function of the polarization, the angle of incidence and the azimuth. The principle of such an effect is also in the published patent application FR 2 509 873 described. In direct reflection (zero-order diffraction), such a component behaves like a colored mirror whose color varies with the direction of observation.

An element of the type DID has the advantage of having a very high transmission at normal incidence (typically greater than 80% or greater than 90%) and a reflection near 40% in direct reflection. Such an element will in this way be able to increase the contrast of the visible identification information in specular reflection on the front side of the component and at the same time make it possible to visualize this information in transmission on the rear side of the component.

In one embodiment, the semi-reflective element will be able to have two DID type components that form complementary patterns to create a simple pattern that can be controlled on the back side (see 8A . 8B ).

The 3 to 5 illustrate embodiments of multilayered components according to the present description.

The secured component 10 has an array of layers (generally called structural layers) that comprise a card core 21 For example, made of polycarbonate, a layer 22 which is sensitive to laser marking (identification information is indicated by dashed lines in the figure), a transparent protective layer 23 , a semi-reflective contrast element 4 (wider or less wide than the transparency area).

Generally, at least one of the layers of the stack is opaque, such as the card core 11 while the other layers are transparent. The transparency area 5 in this case corresponds to an area in which a transparency window is formed in the opaque layer. For example, in the case of a layer which is opaque by printing, the transparency window is an unprinted area of the card. Alternatively, an opening may be formed in the opaque card, for example the card core.

Like this in the 3 to 5 is visible, the semi-reflective element 4 be arranged on one or the other of the layers of the arrangement of layers, provided this on the back (V) each time relative to the personalisable layer 22 is arranged. The semi-reflective element, which is generally itself formed of one or more layers, is advantageously encapsulated between two layers such that it is protected.

• – das Bilden des halbreflektierenden Elements auf einer der Strukturschichten, wobei die Strukturschicht in einem Beispiel die personalisierbare Schicht sein kann; das Bilden kann direkt durch Auftragen der Schicht oder der Schichten, die das halbreflektierende Element bildet oder bilden, auf der Strukturschicht erfolgen (beispielsweise im Fall des Druckens von einer Schicht mit hohem Index). Vorteilhafterweise kann beispielsweise in dem Fall eines halbreflektierenden Elements, das eine strukturierte Schicht aufweist, das Bilden in 2 Schritten erfolgen: Bilden des halbreflektierenden Elements auf einer Trägerfolie, dann Übertragen auf die Strukturschicht, beispielsweise durch Wärmeübertragung.
• – Stapeln und Verschmelzen der Schichten derart, dass sich das halbreflektierende Element auf der Rückseite der gesicherten Komponente relativ zu der personalisierbaren Schicht befindet.

A method for producing a secured component, as in 3 to 5 described, advantageously has the following:

• Forming the semi-reflective element on one of the structural layers, the structural layer in one example being the personalizable layer; The forming can be done directly by applying the layer or layers forming or forming the semi-reflective element to the structural layer (for example, in the case of printing from a high-index layer). Advantageously, for example, in the case of a semi-reflective element having a patterned layer, the formation can be done in 2 steps: forming the semi-reflective element on a carrier film, then transferring to the structural layer, for example by heat transfer.
• Stacking and fusing of the layers such that the semi-reflective element is located on the back of the secured component relative to the personalisable layer.

The 6 to 8th illustrate front / rear views of the secured components in which the semi-reflective element is a DID-type component.

The 6A and 6B thus provide a secure component 200 For example, a multi-layer card of the type of ID card, which is observed in direct reflection respectively on the front and the back of the component. The 7A and 7B make the same component 200 which is observed in transmission at normal incidence on the front and the back, respectively. As in the example of the prior art in 1 shown, assigns the component 200 a transparency area 201 and a mark in the form of a photo 202 on.

Compared to the component of the prior art, the photograph 202 on the front of the card and in direct reflection ( 6A ) are observed with a much higher contrast. In fact, the semi-reflective element DID arranged under the identification information allows the light to be reflected on the whole transparency window, except in the places where the identification data is entered, in this case the photograph 202 that appear opaque. Thus, compared to a window that would be completely transparent and through which the surroundings of the location of the observation of the component could be seen, which is generally dark, becomes a bright colored background 203 created, of which the identification information (opaque) clearly highlight.

On the back of the card ( 6B ) the photo is no longer visible in direct reflection because the light is partially reflected by the semi-reflective element. The contrasted observation of the identification information in direct reflection on the back of the card and that in direct reflection on the back are no longer visible, represents a first level of authentication of the component.

On the other hand, as in the 7A and 7B becomes clear, the identification information in transmission simultaneously visible on the front and on the back of the component, which represents a second level of identification.

The 8A and 8B illustrate the observation in direct reflection in the particular case that the semi-reflective element has two DID type components that form complementary patterns. As in the previous example, the photo is 202 visible in direct reflection only on the back of the component. However, in this example, each of the DIDs provides a different colored, light background 204 . 205 to build. For example, the DIDs are chosen such that the respective subwavelength gratings are oriented vertically so that by azimuthal rotation of the component a permutation of the colors between the regions 204 and 205 can be observed.

The 9 describes a view of identity card type identity document obtained by a method according to the present description. The map 300 has a certain amount of printed personalization information on its front, including a photo, for example 310 and alphanumeric characters 311 , Incidentally, the map shows, as in the example of 6 and 7 , a transparency area 301 (here oval) with a photo 302 which is engraved, for example, in a suitable personalisable layer with the laser. There is also a DID type semi-reflective element in the transparency area, which allows direct reflection to create a bright, colored background 303 to build. The photo in the transparency area allows authentication of the card with the naked eye. The DID type semi-reflective element located in the transparency window enhances authentication. It does not modify the view of the photo in transmission. It allows to increase the contrast in reflection.

Although the secured component according to the invention has been described by a number of embodiments, they have various embodiments, changes, and improvements that will be apparent to those skilled in the art, it being understood that these various embodiments, changes, and improvements are part of the scope of the Invention are as defined by the claims that follow.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2013/038361 A1 [0004]
• EP 1935663 [0005]
• FR 2838202 [0041]
• FR 2509873 [0041]

Claims (2)

Multi-layered, secure identification component ( 10 ), comprising a transparency area ( 5 ) and at the transparency area: a personalizable layer ( 22 ) which is sensitive to laser marking and which is intended to store identification information ( 6 ), - a semi-reflective element ( 4 ) comprising a diffractive optical component in the zeroth order of diffraction of the type DID and that on the rear side (V) of the component relative to the personalisable layer ( 22 ) is arranged such that the identification information ( 6 ) in reflection on the front of the component and in transmission at the same time on the front and on the back of the component can be checked. A multi-layered, secure identification component according to claim 1, wherein the semi-reflective element ( 4 ) comprises two diffractive optical components in the zeroth diffraction order of the DID type, which form additional patterns.

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