BACKGROUND
[0001] This invention relates generally to secure identification documents and method for
making such identification documents. More particularly, this invention relates to
an identification document comprising an anti-counterfeiting element that allows detecting
a fraudulent modification of an existing official personalization or a completely
falsified document.
[0002] Identification documents are associated with secure applications, such as for example
driving licenses, identity cards, membership cards, badges or passes, passports, discount
cards, banking cards, money cards, multi-application cards, and other papers of value;
and security documents such as bank notes. Such documents are widely used, they may
comprise an electronic module or not. If they comprise an electronic module, they
can function either with contact and/or without contacts depending on the application
to which they are intended. They may take the shape of card or a booklet or something
else. Such identification documents are graphically personalized. Personalized information
is personal data of the card's owner, i.e for example his photo, his name, his birth
date, his social security number, his biometric information such as his fingerprint
for example, a validity date, an identification number allocated to him etc... This
personalized information is printed onto the surface of the document, or into one
or more constitution layers of the document. Because of the value and importance associated
with each of these data carriers, they are often the subject of unauthorized copying
and alterations, and forgeries.
[0003] To prevent such activities from being carried out on these documents, different types
of visual and touchable security features have been added to them. Document
DE 10 2006 021 961 A1 discloses one of said visual security features. Another one of these security features
consists in providing a see-though portion into the structure of the document, said
see-through portion comprising security markings and/or personal data of the legitimate
holder, that are for example laser-engraved into the material constituting the see-through
portion. Generally, such see-through portion is made in polycarbonate comprising carbon
particles that are sensitive to laser beam, so that they burn and blacken under the
laser beam. Such see-though portion are difficult to scan and therefore to copy. Moreover,
due to the fact that the security markings are laser engraved into the material constituting
the see-through portion, they are impossible to remove by scratching or by attacking
with chemical solvents or the like. However, a drawback of such security feature relates
to the fact that an infringer can still modify the markings inside the see-through
portion, by laser engraving, even if it is difficult, it is not impossible.
[0004] Another existing security feature consists in providing on at least one of the main
surfaces of the identification document, an optically variable security element, which
comprises at least two security markings and/or images. Such security feature is also
called "CLI/MLI image" (acronym for "Change Laser Image/ Multiple Laser Image). Said
markings are decomposed and interleaved, to create a complex image that is printed
into the document. Then, a filter is placed over this complex image, said filter being
arranged so that it enables to visualize each marking at a respective particular angle
by tilting the document. Such filter can be made either with micro-lens or with printed
pattern, which in the simplest case can comprise just parallel lines.
[0005] Figure 1 shows an example of such existing printed filter over a complex image in
a cross-sectional view. The filter 4 comprises parallel lines 6 that are printed onto
an upper layer 2 at least translucent. In fact, the filter comprises a set of substantially
opaque lines 6 that are parallel and clear gaps 5 between opaque lines 6. The period
P of the filter is defined by the sum of the line width L and the gap width G. The
gap width G essentially defines the resolution requirements for the markings to be
revealed. A complex image 3 is printed onto a layer underneath, for example a core
layer 1. The complex image, or security pattern, comprises in this example two markings
A and B decomposed into bands that are interleaved. The printing of the complex image
and the filter can be made either by laser engraving or by conventional printing process
such as inkjet or offset or silkscreen etc... Each security markings A and B is decomposed
into bands that are spaced from a distance P from each other, and each band A of one
security marking is interleaved with two bands of the other security marking B, and
reciprocally. The distance P between each band of each security marking must be substantially
the same as the period P of the filter layer 4. Then, when tilting the document, such
that only one marking A or B is seen through the clear gaps 5 of the filter layer
4, this marking is seen clearly. In the figure 1, one can see that marking A can be
viewed when tilting the document at viewing angle VA, while marking B can be viewed
when tilting the document at viewing angle VB.
[0006] However, even if these optically variable security elements are difficult to copy
because impossible to scan, they may still be falsified. Indeed, an infringer can
arrive to change the variable data viewed through the filter, or to remove the part
of the document comprising the optically variable security feature and to replace
it by another part comprising another falsified optically variable element. Moreover
such security feature necessitates complex software for computing the complex image,
and it necessitates also the use of a filter material that has to be well registrated
with the computed complex image, in order to achieve the required effect. Consequently,
such a security feature is relatively complex and expensive to implement.
[0007] Considering the above, a problem intended to be solved by the invention, is to propose
an identification document comprising an anti-counterfeiting element able to display
different data and/or images when tilting the document, so that it protects the personalization
against counterfeiting, said anti-counterfeiting element being very difficult to modify
or to copy, and impossible to remove without destroying the material, while being
easy to create.
SUMMARY
[0008] The solution of the invention to this problem relates to the fact that said anti-counterfeiting
element is created in three-dimensions through the thickness and depth of an at least
translucent portion of the document, as claimed in one or several of the following
claims 1 to 9.
[0009] Thus, the fact to create different data and/or images to be revealed depending on
the tilt angle of the document, in three dimensions, so that the data and/or image
is not printed at only one depth of the at least translucent portion, but through
the thickness at different depths, it becomes much more difficult to reproduce it
or to modify it , because it necessitates to accurately control the depth to which
the modification is to be made.
[0010] Each data and/or image to be revealed at a predetermined tilting angle is created
into a predetermined plan, through the thickness and depth of the at least translucent
portion, and comprises pixels, each pixel being arranged at predetermined location
into said plan.
[0011] In a preferred embodiment, the pixels are formed by bubbles that are created into
the material of said at least translucent portion.
[0012] Such bubbles are very advantageous because it becomes impossible to remove them without
destroying the material. Moreover, they enable to prevent the fraudulent creation
of additional bubbles under existing bubbles, because the existing bubbles interfere
on the laser beam used to create such bubbles.
[0013] According to another aspect, the invention relates also to a method for manufacturing
a secure identification document comprising an anti-counterfeiting element able to
display different data and/or images when tilting the document, said anti-counterfeiting
element being created in predetermined locations that are arranged in different planes,
said planes being placed at different angles. The method is particularly remarkable
in that it comprises following steps :
- for each data and/or image to be revealed, defining a respective plan through the
thickness and depth of an at least translucent portion,
- in each plan, computing amongst several potential locations, the location of each
pixel of the data and/or image to be revealed, each location inside said plan being
more or less deep into the at least translucent portion,
- creating each pixel at each computed location, starting from bottom to the top of
the at least translucent portion.
[0014] According to a further embodiment, the method comprises following additional step:
for each thickness of the at least translucent portion, moving each computed location
of each pixel of each data and/or image to be revealed, along lines of potential locations
into transversal plans that intersect defined plans, in order to create a common set
of pixels able to display each data and/or image depending on the tilt angle of the
document.
[0015] The pixels are advantageously formed by bubbles that are created by means of a laser
beam with short focal distance.
BRIEF DESCRIPTION OF DRAWINGS
[0016] Other particularities and advantages of the invention will be better understood with
the help of the description below, which has been provided as an illustrative and
non limitative example by reference to the enclosed figures that represent:
Figure 1, already described, is a cross-sectional view of an existing printed filter
over a complex image able to reveal different sets of data or images when tilting
the document and viewed through the printed filter,
Figure 2, a schematic perspective view of an identification document comprising an
anti-counterfeiting element according to a first embodiment of the invention,
Figure 3, schemas illustrating the steps of construction of an anti-counterfeiting
element according to the embodiment of figure 2,
Figure 4A to 4C, schemas illustrating the steps of construction of an anti-counterfeiting
element according to a second embodiment of the invention,
Figure 5, a schematic perspective view of an identification document comprising the
anti-counterfeiting element according to the second embodiment and made according
to the manufacturing steps illustrated in figures 4A to 4C.
DETAILED DESCRIPTION
[0017] Hereafter, an embodiment of the present invention will be described in the context
of identity (ID) card and a method for producing it. However, it is to be understood
that the invention is usable with any data carrier that includes, but is not limited
to, a driving license, a badge or pass, a passport, a discount card, a membership
card, a banking card, a credit card, a money card, a multi-application card, and other
security documents and papers of value that are to be provided with information or
data in such a way that they cannot be easily imitated by common means. Such identification
documents may take indifferently the shape of card, or booklet, or something else.
[0018] Figure 2 shows a schematic perspective view of an identification card 10. The card
comprises for example a body 20 made either of only one layer, by molding for example,
or of several layers attached together by means of lamination or glue or other conventional
process. The card body 20 is preferably protected from external stresses by two overlay
layers 21, 22 that cover each main surface of the body. These overlays are preferably
transparent, or at least translucent, in order to let visible some information 26
printed onto at least one main surface of the body. Such information 26 can be linked
to the personal information of the legitimate holder of the identity card, such as
his name and/or his birth date and/or his address and/or his photography and/or a
biometric information such as his finger print etc...
[0019] The card body 20 can be either opaque, or at least translucent and at the most transparent.
If the body is completely opaque, it is necessary to provide a portion 23, inside
the card body 20, which is at least translucent and at the most transparent. Such
translucent portion 23 enables to create a security marking inside, which acts as
an anti-counterfeiting element, i.e. that allows detecting a fraudulent modification
of an existing document or a completely falsified document.
[0020] In order to increase the security of such document, the anti-counterfeiting element,
which is provided inside the at least translucent portion 23, is created in three
dimensions through the thickness and depth of the portion 23. In fact, the different
data and/or images that are intended to be viewed through the at least translucent
portion 23 are created in predetermined locations that are arranged in different plans
through the thickness and depth of the portion.
[0021] In the example of figure 2, two different information are able to be viewed through
the portion 23 depending on the tilting angle of the card around the tilting axis
A-A, which is for example perpendicular to front longitudinal edge E of the document.
At a first angle α1, information "02" is viewed, while at a second angle α2 information
"13" is viewed. For that, each character that composes the information to be revealed
at a particular angle, is created into a particular plan 24, 25 through the thickness
T and depth D of the at least translucent portion 23. In the example of figure 2,
each character "0" and "2" of the first information "02" to be displayed is created
in each parallel plan 24a and 24b, while each character "1" and "3" of the second
information "13" to be revealed is created in each other parallel plan 25a, 25b. In
the example of figure 2, only two different data are to be revealed when tilting the
document, but it is only for simplification and of course it is possible to display
more than two different data when tilting the document. In this case, each different
data to be displayed is created into one different plan 24, 25 through the thickness
T and depth D of the portion 23. The data to be revealed can be indifferently text
and/or number and/or logo and/or image and/ or photography, or the like... Moreover,
such data can be linked to the personal information of the legitimate holder of the
ID card. In this later case, each data and/or image to be displayed, when tilting
the identification document, is variable from one document to another.
[0022] Each plan 24, 25 contains several potential locations 27 (shown in figure 3) for
creating each point or pixel that will compose one character. Amongst these potential
locations 27, some of them are transformed in order to change the appearance of the
material of the at least translucent portion 23, so that each point or pixel that
composes each character of the information to be revealed becomes visible. For that,
the material can be changed at predetermined locations into each plan 24, 25, by using
a laser beam for example. Such laser beam can either burn the material constituting
the portion 23, so that black points can be obtained for each pixel of each character
to display, or it can create bubbles inside the material by material ablation or sublimation.
In order to change the material with great precision, a laser beam with short focal
distance is preferred, such as a picosecond YAG laser for example, with a short focal
distance of typically few centimeters. For example, focale distance can be reduced
to 5 cm. YAG laser used can have a short pulse duration, typically 10 ps, pulse energy
can vary from 0 up to 200µJ at a repetition rate of 50KHz for standard YAG laser functioning
at 1064nm with maximum power of 10W, while the pulse energy can be around 100µJ at
a repetition rate of 50KHz for YAG laser functioning at 532 nm wavelength with a maximum
power of 5W. But such example is not limitative and it is also possible to use for
example nanosecond laser, which is less expensive than picosencond laser.
[0023] For creating the bubbles or black points in a predetermined depth inside the portion
23, or inside the at least translucent card body if such card body is used, the card
is tilted or moved in order to change its position compare to the focal distance of
the laser beam.
[0024] The thus created bubbles that are trapped inside the thickness of the document may
be of different nature. They can be for example filled with a gas resulting from the
combustion of the constitution material. Thus, they can be filed for example by a
carbonic gas, which forms due to the presence of carbon particles in the constituting
material 23, or by a chlorine gas for example, due to the combustion of PVC when this
material is used in the constitution of the at least translucent portion 23, or the
at least translucent body 20, in case no see-through portion 23 is used but only an
at least translucent card body. Moreover, such bubbles are not limited to spherical
shape, but can be of any three-dimensional shape, which is representative of a change
of the visual appearance of the constitution material. In a further example, such
three-dimensional shape can be not filled by a gas but can offer an optical distortion,
such that it appears with a different coloration into the at least translucent material.
[0025] Such bubbles present some advantages. Namely, if an attempt is made by an infringer
to modify the information to be revealed when tilting the document, by means of a
laser beam through the thickness of the at least translucent portion 23, then the
existing bubbles will interfere onto the laser beam which will be diffracted, so that
fraudulent modification will appear to be different than the original anti-counterfeiting
element and fraud will appear immediately to naked eyes.
[0026] In the schema of figure 2, one can define a plan P1(YOY') perpendicular to the two
plans 24,(XOY) and 25 (XOY') Such transversal plan P1, which is parallel to front
edge E surface, can be with other relative angles, which must be around the 90° compare
to plans 24 (XOY) and 25 (XOY'). This plan P1 provides the alignment of the bubbles
of one of the lines, of a logo or text or other items to be revealed by tiliting the
card. By duplicating the plan P1 using other plans parallel to P1, across the plans
24 and 25, through the thickness T of the portion 23, and at separated distance of
pixels size, the different lines of the different items to be created are defined.
[0027] In order to explain how the different locations of the pixels constituting each character
to be displayed are predetermined, i.e. the locations of each bubble to create, figure
3 shows an example where the thickness T of the at least translucent portion 23 has
been theoretically divided into 7 parts numbered A to G, corresponding respectively
to the relative plans P1/A to P1/G . All these parts are intended to be pilled together,
and when pilled they reveal the information to be displayed at a particular tilt angle
of the document.
[0028] As it has already been explained, each part A to G corresponds to the plans P1/A
to P1/G, which corresponds respectively to each line of pixels, of data and/or image
to be revealed, that have to be created in plans 24 (XOY) and 25 (XOY'). The intersection
of the plan P1/A to P1/G with the plans 24 (XOY) and 25 (XOY') provides respectively
the line OY and OY', on which the pixels of the Line A to Line G, of the data and/or
images to be revealed, that have to be created.
[0029] Thus, on part A, one can see, on the left part of the drawing, that at first intersection
of the transversal plan P1/A and the surface 24a corresponding to first top line OY
of plan XOY 24a, there are three locations for bubbles to create (in dark) amongst
potential locations 27 (schematized by all the circles). This corresponds to the creation
of the dark pixels of character "0" on Line A. In a same manner, the intersection
of the transversal plan P1/A and the surface 25a corresponding to first top line OY'
of plan XO'Y' 25a, reveals only one location for bubbles to create (in dark) amongst
potential locations 27 (schematized by all the circles). This corresponds to the creation
of the only dark pixel of character "1" on Line A. In a similar way, on the right
part of the drawing, first intersection of the transversal plan P1/A and surface 24b
corresponding to first top line OY of plan XOY 24b, there are three locations for
bubbles to create (in dark), corresponding to the three dark pixels of the character
"2" on Line A, while first intersection of the transversal plan P1/A and surface 25b
corresponding to first top line OY' of plan XOY' 25b, there are three locations for
bubbles to create (in dark), corresponding to the three dark pixels of the character
"3" on Line A. These steps of computing are repeated for each thickness T of portion
23, using plan P1/A to P1/G in correspondence to the characters line A to Line G,
i.e. for each line OY and OY' of each plan XOY and XOY', until bottom lines OY, OY'
(Line G, part G). Then, all the computed bubbles are created inside the at least translucent
material, by using a laser beam with short focal distance. For that, for each thickness
of the at least translucent portion, bubbles are created in such a manner that the
deepest are first created, until the surface of the at least translucent portion.
[0030] Then, when all the plans P1/A to P1/G are pilled together, all the created bubbles
on surface 24a, by means of transversal plans P1 corresponding to all the lines OY
of plan XOY, are intended to reveal "0", while all the created bubbles on first surface
24b are intended to reveal "2". In the same manner, all the created bubbles on surface
25a, by means of transversal plans P1" corresponding to all the lines OY' of plan
XOY', are intended to reveal "1", while surface 25b is intended to reveal "3".
[0031] In the illustrated example, when all the parts are pilled together, the markings
that are created in each parallel plan 24 reveal first information "02" when tilting
the document at a first angle, "0" being located in first plan 24a, while "2" is located
in second parallel plan 24b; and second information "13" appears when tilting the
document at a second angle , "1" being created in first plan 25a, while "3" being
created in second parallel plan 25b. Planes 24 and 25 are in fact inclined compare
to the main surfaces of the document and extend through the thickness T and depth
D of the at least translucent portion 23.
[0032] Creation of data and/or images, comprising bubble for each pixel of a character to
display is preferred compare to a black burned point. Indeed, in such case, the bubbles
are created inside the thickness of the at least translucent portion 23 from the bottom
to the top of the portion, in order to render impossible the counterfeiting possibilities
by modification. Namely, it is impossible to create an additional bubble deeper than
an existing bubble, the existing bubble making interference for the laser beam, and
causing particularly a diffraction phenomenon.
[0033] A second and more complex embodiment, also called "encrypted embodiment" in the following
description, compare to the first simple embodiment, is illustrated in figures 4A
to 4C and 5. Instead of creating several sets of bubbles, each set being intended
to reveal each information to be displayed as in the first embodiment, this encrypted
embodiment consists in finding a common location for only one common set of bubbles,
which is intended to reveal at least two different data and/or images depending on
the tilt angle of the document. For implementing such encrypted embodiment, the first
simplest embodiment defines the starting point for computing the locations of the
common set of bubbles.
[0034] Figure 4A shows two different plans 24 and 25, into which are theoretically created
the bubbles, according to the simplest first embodiment, for displaying respectively
the figure "0" and the figure "1" depending on the tilt angle of the document around
a tilting axis A-A. In figure 4A, plans 24 (XOY) and 25 (XOY') are a little bit shifted
from theoretical axis OX, in order to show the two figures "0" and "1" to be revealed.
Moreover, the figures are shown such that first front lines OY and OY' on the drawing
are the bottom lines (i.e. the characters line G in the portion 23, compare to explanations
given with figure 3).
[0035] First plan 24 is called plan XOY. The schema illustrates a number of bubbles. Amongst
these schematic bubbles, the clear circles 27 schematize potential locations of bubbles
into the plan XOY, while the dark bubbles schematize the theoretical locations of
the bubbles created in the plan XOY according to the first simplest embodiment, according
to which each information to be revealed is created into one plan. In this first plan
24 XOY, one can see that the dark bubbles are located, so that they draw the figure
"0". In the same manner, the second plan 25, also called plan XOY', comprises dark
bubbles that are located in locations, so that they draw the figure "1".
[0036] Figure 4B schematizes the view on the bottom edge, opposite to front longitudinal
edge E of the document (front edge E is shown in figure 5). This surface of bottom
edge comprises a transversal plan P1 having a triangle shape, whose sides corresponds
respectively to lines OY and OY' of the two plans XOY and XOY' . In fact, at each
thickness T into the translucent portion 23, there is a surface, parallel to the surface
of front longitudinal edge E, that comprises a transversal plan P1 having a triangle
shape, whose sides corresponds to each line OY and OY' of the plans XOY and XOY'.
This transversal plan P1 is the same as the first embodiment and figure 3.
[0037] For the purpose of computation of the common locations of the common set of bubbles
in this second embodiment, a second transversal plan P2, symmetrical to the first
P1 compare to the base of triangle, is created. Then, for each thickness T of the
at least translucent portion, i.e. for each line OY, or OY' of each plan XOY, XOY',
the location of bubbles to be created for each information to be revealed is moved
into the lozenge formed by the two transversal plans P1, P2, in order to obtain common
locations of bubbles, defining a common set of bubbles, for the 2 characters to be
displayed "0" and "1". This is schematized in figure 4C for the first line OY of the
plan XOY and the first line OY' of the plan XOY', said first line being at the bottom
of the portion 23. In figure 4C, potential locations into the lozenge are schematized
by clear bubbles, while theoretical bubbles for creating different sets of bubbles
for each information to be revealed "0" and "1" according to first embodiment are
schematized by a bold circle, and the common new set of bubbles, according to the
encrypted embodiment, intended to display the two characters "0" and "1", depending
on the tilt angle of the document is schematized by dark bubbles. The new locations
of bubbles have to be into the viewing axes of the two transversal planes P1 and P2.
Figure 4C illustrates that the bottom line OY for drawing the "0" comprises theoretically
three bubbles (bold encircled), while the bottom line OY' for drawing the "1" comprises
theoretically five bubbles (bold encircled). In this case, the common set of bubbles
comprises only five bubbles and not eight, i.e. the greatest number of bubbles between
the two lines OY and OY' of the two plans at the same thickness T. These locations
of bubbles are moved towards the arrows along lines of potential locations 27 of bubbles
into the lozenge of the transversal plans P1, P2 that intersect the two planes XOY
and XOY' , so that there is more than one possibility to locate the common set of
bubbles. Some of the possible possibilities are shown in figure 4C. Then, these steps
are repeated for all the lines OY and OY' of the different plans XOY and XOY', at
different thicknesses T of the at least translucent portion 23, from the deepest pixels
until the pixels near the surface of the at least translucent portion.
[0038] Figure 5 shows a schematic perspective view of an identification document according
to this second encrypted embodiment. The at least translucent portion 23 comprises
a common set 28 of bubbles that does not seem to draw anything particularly. However,
when tilting the document around the axis A-A perpendicular to the front longitudinal
edge E of the document (along plan XOZ), then some interesting information appear
and disappear depending on the tilt angle. In the illustrated example, a first character
"0" appears at a first angle α1, while a second character "5" appears at a second
angle α2. Before the first angle, a deformed "0" still appears, while between the
two angles one can see a deformed information between a "0" and a "5" and after the
second angle α2 a deformed "5" appears.
[0039] All plans used for the realization of the different detailed embodiments that have
been described can be not necessary perpendicular between each other and can be placed
at different angles of a traditional 3D system comprising axes X, Y,Z and constituted
by the borders of the body of the document 10.
[0040] The detailed embodiments that have been described are not limited to those and other
embodiments apply without departing the scope of the invention. Particularly, the
embodiments have been described for only two different information, but the invention
applies also for such embodiments intended to reveal more than two different information
depending on the tilt angle. Moreover, the described embodiments comprise an at least
translucent portion 23, but the invention applies also for document whose the whole
core is at least translucent and at the most transparent.
[0041] Bubbles that are created through the thickness of the translucent portion are easy
to produce with an appropriate laser beam and appropriate computing software.
[0042] Moreover, it is possible to create information to be displayed that can be variable
from one document to another, depending on personalization data. Indeed, it is possible
to create two or more different data and/or images, through the thickness and depth
of the translucent portion, said data and/or images being linked to the personalization
information of the legitimate holder of the document.
[0043] Such laser security feature has to be made from the deepest part to the surface of
the transparent portion, in order to limit the counterfeiting possibilities. Indeed,
it is impossible to create an additional bubble deeper than an existing bubble, the
existing bubble interfering on the laser beam and causing particularly a diffraction
phenomenon.
[0044] Moreover, such security feature is difficult to copy or modify because placement
possibilities are difficult to compute. Finally, concerning the second encrypted embodiment,
adding a bubble, in order to modify a first data and/or image, implies to modify the
second data and/or image to be revealed. Consequently, the second encrypted embodiment
is much more difficult to modify.
1. Identification document comprising an anti-counterfeiting element able to display
different data and/or images when tilting the document, characterized in that said anti-counterfeiting element is created in predetermined locations that are arranged
in different planes through the thickness (T) and depth (D) of an at least translucent
portion (23, 20) of the document, characterized in that said planes are placed at different angles, and each data and/or image to be revealed
at a predetermined tilt angle is created into one of said plans (24 (XOY); 25(XOY')),
and comprises pixels, each pixel being arranged at predetermined location into said
plan (24 (XOY); 25(XOY')).
2. Identification document according to claim 1, wherein the whole body (20) of the document
defines said at least translucent portion.
3. Identification document according to anyone of preceding claims, wherein the pixels
are formed by bubbles that are created into the material of said at least translucent
portion (23, 20).
4. Identification document according to anyone of preceding claims, wherein at least
one data and/or image to be revealed at a predetermined tilting angle is linked to
personalized information of the legitimate holder of the document.
5. Method for manufacturing a secure identification document comprising an anti-counterfeiting
element able to display different data and/or images when tilting the document, said
anti-counterfeiting element is created in predetermined locations that are arranged
in different planes, said planes being placed at different angles
characterized in that said method comprises the following steps :
- for each data and/or image to be revealed, defining a respective plan (24 (XOY);
25(XOY')) through the thickness (T) and depth (D) of an at least translucent portion
(23, 20),
- in each plan (24 (XOY); 25(XOY')), computing amongst several potential locations
(27), the location of each pixel of each data and/or image to be revealed, each location
inside said plan being more or less deep into the at least translucent portion (23,
20),
- creating each pixel at each computed location, starting from bottom to the top of
the at least translucent portion (23, 20).
6. Method according to claim 5, wherein the computing step consists in building several
transversal plans (P1/A to P1/G) that intersect each defined plan (24 (XOY); 25(XOY')),
through the thickness (T) of the at least translucent portion (23, 20), and at separated
distance of pixel size, each built plan (P1/A to P1/G) providing the lines of the
pixels to be created at each thickness (T) for each line (OY, OY') of each defined
plan (24 (XOY); 25(XOY')).
7. Method according to claim 6, wherein it comprises following additional step: for each
thickness (T) of the at least translucent portion (23, 20), moving each computed location
of each pixel, of each data and/or image to be revealed, along lines of potential
locations (27) into transversal plans (P1, P2) that intersect the defined plans (24
(XOY); 25(XOY')), in order to create a common set (28) of pixels able to display each
data and/or image depending on the tilt angle of the document.
8. Method according to anyone of claims 5 to 7, wherein the step of creation of pixels
consists in creating bubbles in place of pixels, by means of a laser beam with short
focal distance.
9. Method according to anyone of claims 5 to 8, wherein the step of computing the locations
of pixels of the data and/or images to display consists in computing, for each thickness
(T) of the at least translucent portion (23, 20), said locations, so that when all
the computed locations are pilled, they form the data and/or images to be displayed.
1. Ausweisdokument, umfassend ein fälschungssicheres Element, das bei Neigung des Dokuments
verschiedene Daten und/oder Bilder anzeigen kann, dadurch gekennzeichnet, dass dieses fälschungssichere Element an vorgegebenen Stellen erzeugt wird, die in verschiedenen
Schichten durch die Dicke (T) und Tiefe (D) eines zumindest transluzenten Bereiches
(23, 20) des Dokuments hindurch angeordnet sind, dadurch gekennzeichnet, dass diese Schichten in verschiedenen Winkeln positioniert sind und jedes bei einem vorgegebenen
Neigungswinkel anzuzeigendes Daten-Item und/oder Bild in einer dieser Schichten (24
(XOY); 25(XOY')) erzeugt wird und Pixel umfasst, wobei jedes Pixel an einer vorgegebenen
Stelle in dieser Schicht (24 (XOY); 25(XOY')) angeordnet wird.
2. Ausweisdokument nach Anspruch 1, wobei der gesamte Körper (20) des Dokuments den zumindest
transluzenten Bereich definiert.
3. Ausweisdokument nach einem der vorhergehenden Ansprüche, wobei die Pixel durch Blasen
gebildet werden, die im Material des zumindest transluzenten Bereiches (23, 20) erzeugt
werden.
4. Ausweisdokument nach einem der vorhergehenden Ansprüche, wobei mindestens ein bei
einem vorgegebenen Neigungswinkel anzuzeigendes Daten-Item und/oder Bild mit personenbezogenen
Informationen des rechtmäßigen Inhabers des Dokuments verbunden ist.
5. Verfahren zur Herstellung eines sicheren Ausweisdokuments, das ein fälschungssicheres
Element umfasst, das bei Neigung des Dokuments verschiedene Daten und/oder Bilder
anzeigen kann, wobei dieses fälschungssichere Element an vorgegebenen Stellen erzeugt
wird, die in verschiedenen Schichten angeordnet sind, wobei diese Schichten in verschiedenen
Winkeln positioniert sind,
dadurch gekennzeichnet, dass dieses
Verfahren die folgenden Schritte umfasst:
- für jedes zu offenbarendes Daten-Item und/oder Bild Festlegung einer entsprechenden
Schicht (24 (XOY); 25(XOY')) durch die Dicke (T) und Tiefe (D) eines zumindest transluzenten
Bereiches (23, 20) hindurch,
- in jeder Schicht (24 (XOY); 25(XOY')) Berechnung der Stelle eines jeden Pixels von
jedem anzuzeigenden Daten-Item und/oder Bild aus mehreren potenziellen Stellen (27),
wobei sich jede Stelle innerhalb dieser Schicht mehr oder weniger tief in dem zumindest
transluzenten Bereich (23, 20) befindet.
- Erzeugung jedes Pixels an jeder berechneten Stelle von unten nach oben im zumindest
transluzenten Bereich (23, 20).
6. Verfahren nach Anspruch 5, wobei der Berechnungsschritt aus dem Aufbau mehrerer transversaler
Schichten (P1/A bis P1/G) besteht, die jede festgelegte Schicht (24 (XOY); 25(XOY'))
durch die Dicke (T) des zumindest transluzenten Bereiches (23, 20) hindurch und einem
Trennungsabstand von Pixelgröße kreuzen, wobei jede erstellte Schicht (P1/A bis P1/G)
die Linien der zu erzeugenden Pixel an jeder Dicke (T) für jede Linie (OY, OY') von
jeder festgelegten Schicht (24 (XOY); 25(XOY')) vorgibt.
7. Verfahren nach Anspruch 6, wobei dieses den folgenden zusätzlichen Schritt umfasst:
für jede Dicke (T) des zumindest transluzenten Bereiches (23, 20) Bewegung jeder berechneten
Stelle von jedem Pixel der anzuzeigenden Daten-Items und/oder Bilder entlang der Linien
der potenziellen Stellen (27) in transversalen Schichten (P1, P2), die sich mit den
festgelegten Schichten (24 (XOY); 25(XOY')) überschneiden, um ein gemeinsames Pixel-Set
(28) zu erzeugen, das je nach Neigungswinkel des Dokuments alle Daten und/oder Bilder
anzeigen kann.
8. Verfahren nach einem der Ansprüche 5 bis 7, wobei der Schritt der Pixelerzeugung darin
besteht, mithilfe eines Laserstrahls mit kurzer Brennweite Blasen statt Pixel zu erzeugen.
9. Verfahren nach einem der Ansprüche 5 bis 8, wobei der Schritt der Berechnung der Pixelstellen
der anzuzeigenden Daten und/oder Bilder darin besteht, die Stellen für jede Dicke
(T) des zumindest transluzenten Bereiches (23, 20) zu berechnen, sodass bei der Übereinanderlegung
aller berechneten Stellen die anzuzeigenden Daten und/oder Bilder gebildet werden.
1. Document d'identification comprenant un élément anti-contrefaçon capable d'afficher
différentes données et/ou images lorsqu'on penche le document, caractérisé en ce que ledit élément anti-contrefaçon est créé à des emplacements prédéterminés qui sont
agencés dans des plans différents au moyen de l'épaisseur (T) et de la profondeur
(D) d'au moins une partie translucide (23, 20) du document, caractérisé en ce que lesdits plans sont placés à divers angles, et chaque donnée et/ou image devant être
révélée à un angle d'inclinaison prédéterminé est créée dans l'un desdits plans (24
(XOY) ; 25(XOY')) et comprend des pixels, chaque pixel étant agencé à un emplacement
prédéterminé dans ledit plan (24 (XOY) ; 25(XOY')).
2. Document d'identification selon la revendication 1, dans lequel l'ensemble du corps
(20) du document définit ladite partie translucide.
3. Document d'identification selon l'une des revendications précédentes, dans lequel
les pixels sont formés par des bulles qui sont créées dans le matériau de ladite partie
translucide (23, 20).
4. Document d'identification selon l'une des revendications précédentes, dans lequel
au moins une donnée et/ou image devant être révélée à un angle d'inclinaison prédéterminé
est reliée à une information personnalisée du titulaire légitime du document.
5. Procédé de fabrication d'un document d'identification sécurisé comprenant un élément
anti-contrefaçon capable d'afficher différentes données et/ou images lorsqu'on penche
le document,
caractérisé en ce que ledit élément anti-contrefaçon est créé à des emplacements prédéterminés qui sont
agencés dans des plans différents, lesdits plans étant placés à divers angles,
caractérisé en ce que
le procédé comprend les étapes suivantes :
- pour chaque donnée et/ou image devant être révélée, la définition d'un plan respectif
(24 (XOY) ; 25(XOY')) au moyen de l'épaisseur (T) et de la profondeur (D) d'au moins
une partie translucide (23, 20),
- dans chaque plan (24 (XOY) ; 25(XOY')), le calcul parmi plusieurs emplacements potentiels
(27), de l'emplacement de chaque pixel de chaque donnée et/ou image devant être révélée,
chaque emplacement à l'intérieur dudit plan étant situé plus ou moins profondément
dans ladite partie translucide (23, 20),
- la création de chaque pixel à chaque emplacement calculé, en partant du bas pour
remonter vers le haut de ladite partie translucide (23, 20).
6. Procédé selon la revendication 5, dans lequel l'étape de calcul consiste à construire
plusieurs plans transversaux (P1/A à P1/G) qui s'entrecoupent avec chaque plan défini
(24 (XOY) ; 25(XOY')), au moyen de l'épaisseur (T) de ladite partie translucide (23,
20), et à une distance d'éloignement équivalente à la taille d'un pixel, chaque plan
construit (P1/A à P1/G) fournissant les lignes des pixels à créer à chaque épaisseur
(T) pour chaque ligne (OY, OY') de chaque plan défini (24 (XOY) ; 25(XOY')).
7. Procédé selon la revendication 6, dans lequel l'étape supplémentaire suivante est
incluse : pour chaque épaisseur (T) de ladite partie translucide (23, 20), le déplacement
de chaque emplacement calculé de chaque pixel, de chaque donnée et/ou image devant
être révélée, le long des lignes des emplacements potentiels (27) dans des plans transversaux
(P1, P2) qui s'entrecoupent avec les plans définis (24 (XOY) ; 25(XOY')), afin de
créer un ensemble commun (28) de pixels capable d'afficher chaque donnée et/ou image
en fonction de l'angle d'inclinaison du document.
8. Procédé selon l'une des revendications 5 à 7, dans lequel l'étape de création des
pixels consiste à créer des bulles à la place des pixels, au moyen d'un faisceau laser
à courte distance focale.
9. Procédé selon l'une des revendications 5 à 8, dans lequel l'étape de calcul des emplacements
des pixels des données et/ou des images à afficher consiste à calculer lesdits emplacements
pour chaque épaisseur (T) de ladite partie translucide (23, 20), de sorte que lorsque
tous les emplacements calculés sont empilés, ils forment les données et/ou images
à afficher.