CN1283154A

CN1283154A - Security feature for security document or document of value with fractal laminate system

Info

Publication number: CN1283154A
Application number: CN98812557A
Authority: CN
Inventors: 拉尔夫·堡格斯坦迪特
Original assignee: Bundesdruckerei GmbH
Current assignee: Bundesdruckerei GmbH
Priority date: 1997-11-11
Filing date: 1998-10-10
Publication date: 2001-02-07
Also published as: WO1999024265A1; CA2309960A1; EP1030786B1; JP2002516766A; DE19749789A1; HUP0100158A2; IL136038A0; KR20010031973A; PL340404A1; ATE218447T1; EP1030786A1; DE59804359D1

Abstract

A security feature for security documents or documents of value, comprising a transparent body (2) provided with devices for representing graphical information according to an angle (18, 19, 20) between the direction of illumination and the direction of observation. Said devices consist of almost overlapping laminae (7, 8) arranged in the form of steps in said body. Preferably, the lamellae are fractally embodied and arranged in the body (2) in ascending order.

Description

Have fractal laminate system and be used for the safety label of assignment or secure file

The present invention relates to a kind of by the described safety label that is used for assignment or secure file of claim 1 preamble and a kind of its manufacture method.

For assignment and secure file, the prior art that safety label is set is so-called multiple holographic.What here relate to is a kind of holographic that the observer is produced different images from different lines of vision.Known in addition film or the so-called interfering layer in the transparent body usually.Related in this interfering layer is the thin optical layers that produces the image or the color effects that depend on the visual angle.

The variable developing of also known what is called, related here is lens arra, they can be located on the secure file printing or produce the different images that depends on viewing angle above the safety label and according to the line of vision on these lens.

The shortcoming that these mentioned technology exist is that holographic and interfering layer can only show under various lighting conditions after a fashion.In addition, in other words holographic and interfering layer wavelength dispersion, depend on that the visual angle produces different color fringes in white light when observing.

The said lens array needs complicated production technology and certain limited substrate thickness.

Therefore the objective of the invention is to further develop the safety label of the described type of preface, it can produce different image informations with inexpensive manner more with simpler under different visual angles.

The present invention reaches the purpose that is proposed by the described technical regulation of claim 1 feature.

The important feature of the present invention is, arranges each other the almost thin slice of overlap joint in a transparent body, their substantially stairstepping take the cross section of this transparent body with rising.Preferably use the thin slice that rises gradually of fritter.

That is to say that theoretical foundation of the present invention is, transparent substrate is cut apart by opaque thin slice system again, and in such a way, promptly the certain above it line of vision of this substrate looks like transparently, and this moment is if line of vision changes and can see opaque thin slice system and to stop and have an X-rayed by substrate.

If line of vision remains unchanged and rotate substrate below eyes, then substrate depends on that it is transparent or black that corner looks, because substrate passes with its lighttight thin slice block vision in opaque thin slice system under the situation of blackening.

Therefore, rotate substrate and will produce a kind of chiaroscuro effect.

By further design code of the present invention, be not that all thin slices form a straight line in its side edge, but every thin slice is divided into the branch thin slice of the stepped rising in many front and back, just makes the fritter thin slice, they take the cross section of substrate.

By the thin slice system being subdivided into again the advantage that the fritter thin slice brings be, the conversion of bright/dark principle (transparent and black contrast) is being taken place in a flash, that is to say that thin slice separates out with higher iteration rank, guarantee that thus light and shade is changed suddenly when rotating substrate, that is convert other elements to from pictorial element.Therefore perfect condition when a piece thin slice dissolve for the sub-thin slice of fritter be will not have the interstage when finishing with sufficiently high iteration rank.

More than explanation, this transparent substrate can be created by arranging the fritter thin slice, at certain visual angle for example in whole observed value scopes of 90 ° substrate look it is that full impregnated is bright, and, carry out then unexpected conversion and from then on half-convergency play this substrate seems it just no longer is transparent when being rotated further.

Therefore for example having an angle in ideal conditions is 0-90 °, and substrate looks this moment be transparent, is to be a slice dark when seeing this substrate in 91 ° to 180 ° scope when angle.

By further developing of technical regulation of the present invention, regulation, in this transparent substrate, just there is not single thin slice system, that is not only single thus thin slice system guarantees the conversion of light and shade and can provide light and shade information whereby, but has a plurality of cooperative thin slice system in this substrate.

As the front has illustrated, there is one 0-90 ° scope, this moment, first thin slice system was transparent.Now another thin slice system is located in the substrate, make it to look it is that this second thin slice system seems it but is opaque in the light and spacious and transparent angular range in first thin slice system, therefore, in this 0-90 ° range of view angles, can show two kinds of different image informations altogether, that is the image information of first thin slice system (it becomes clear), and under this bright state, when people are 0-90 ° when seeing through this substrate when constant and seeing keeping the visual angle, the image information of second thin slice system looks it is dark.

These thin slice systems can arrangement arranged side by side and/or overlapping up and down.They can be overlapping or be present in the zone separately.

Just explanation above can produce shaded-image when the thin slice with a linearity is divided into one by one the fritter thin slice again.Self-evident, not only can provide light and shade information by the present invention, and can stipulate, also can with the letter formed by straightway one by one again morsel replace and cut apart single linear straightway (monolithic thin slice) again.So, can see for example alphabetical A at first visual angle in substrate inside by transparent substrate itself, along with substrate further turn to another visual angle the time letter A suddenly disappear and demonstrate letter b.

This point if in transparent substrate by overlapping with just can accomplish by making up two different thin slice systems.

Be suitable in transmitted light and/or reverberation, using by thin slice of the present invention system.

Invention object of the present invention is not only drawn by the content of each individual event claim, and by each claim acquisition of combination mutually.

All (comprise summary) in this file disclosed explanation and feature, drawn especially in the accompanying drawings stereochemical structure, all as the important claim of the present invention, and they are individual events or to combine compared with prior art all be novel.

Further specify the present invention by means of only having described a kind of accompanying drawing of implementing approach below.By accompanying drawing and explanation other inventive features and advantages important as can be seen thereof to the present invention.

Wherein:

Fig. 1 substrate and at the schematic diagram that is not subdivided into thin slice simple arrangement under the situation of fritter;

The thin slice of compared to Figure 1 altered substrate of Fig. 2 and morsel;

Fig. 3 a represents continuous straightway, and it constitutes the side by thin slice shown in Figure 1;

Fig. 3 b presses first angle straightway of thin slice shown in the subdivision graph 3a again;

Fig. 3 c is by the twice of this angle straightway shown in the subdivision graph 3b again;

Fig. 3 d is by three times of this angle straightways shown in the subdivision graph 3c again;

Fig. 4 schematically illustrates the light and shade conversion when changing line of vision.

Fig. 1 represents a substrate, that is the transparent body 2, and it has represented three (rough each other partition distance is arranged)

thin slices

6,7,8 altogether.Here, this matrix has two spaced-apart longitudinal sides 3 and here is provided with and longitudinal side narrow side 26 at an angle of 90.In addition, coverage rate 5 defined under matrix reached by last coverage rate 4.What that is to say that it relates to a kind of general plate should be transparent body 2.

Now, at the internal placement of this body

thin slice

6,7,8 parallel to each other, between thin slice,

form space

12,13.

Every thin slice determines by longitudinal edge 9, and the longitudinal edge 9 too body longitudinal edge that is parallel to narrow side 26 extends, and in addition, the face of every thin slice 6-8 also is parallel to the narrow side 26 of this plate body and extends.Each is determined the narrow side of every thin slice by a straightway 1, and it is in substantially parallel relationship to the narrow side of this matrix and extends.

Observing if pass this transparent body along the direction of arrow 10 now, so can see by the space 12 between the

thin slice

6,7,8, because cannot see thin slice itself along this direction, is transparent so this matrix looks.

Otherwise if see matrix 2 along the direction of arrow 11 (or edge direction in contrast), then opaque

thin slice

6,7,8 stops sight lines to pass through matrix; Matrix 2 looks deceives.

Therefore, can provide bright/dark information according to line of vision, this information depends on the position of thin slice and quantity thereof etc.

If will be subdivided into a plurality of straightway 1b, just convertible this straightway 1 by the straightway 1 of Fig. 3 a now by Fig. 3 b.

The present invention is based on following understanding, that is, system can realize surprising projection property by (fritter) thin slice.Fractal laminate system constitutes by a kind of variation of reusing straightway 1 shown in Fig. 3 a.Fig. 3 d has represented a kind of thin slice system as an example, and it forms by a straightway 1 being repeated to be divided into N part and rotating an angle θ.Fig. 3 b to 3d has represented the different iteration rank (Iterations stufen) of structure.Although it is more and more thinner that thin slice is got, the desired degree of depth of thin slice system (D) does not obviously increase.The thin slice system of Fig. 3 d for 0 ° and+any angle between 90 ° nearly all is opaque, and nearly all is transparent (see figure 4) for any angle between 0 ° and-90 °.For little angle θ and big N, the difference between " opaque " and " transparent " increases along with the iteration degree and goes to zero.Can constitute some images by this fritter thin slice, they manifest under the angle of strict regulations and disappear.Can prove on the mathematics that fractal laminate system can be designed as, they form an image desired to this space angle from the parallel projection of any space angle.

The thin slice system can generate (boring) or realizes with similar approach by exposure, inscription, impression, extrusion machinery ground in substrate.They can be designed for perspective or overlook (back lighting or reflection) and observe.Color by appropriate selection substrate and thin slice can realize colored safety label.

Advantage compared with prior art of the present invention is;

-wonderful the effect that can clearly examine;

The structure of-very difficult " reading " thin slice system;

This thin slice system of-more difficult readjustment.

Further develop middle regulation of the present invention, the multilayer of these thin slice systems is in the plane of substrate different depth, and regulation also, can see the image effect that depends on angle in transmitted light.

Can in another kind of form of implementation, stipulate equally, in reverberation, can see the image effect that depends on angle.

The application of fritter

thin slice

14,15,16,17 in substrate shown in Figure 2 shown in Fig. 2 presentation graphs 3d.

By this figure as seen, thin slice 14-17 is constituting under the situation in

space

12,13 closely and is being classified to and stepped each other order is arranged, wherein, when in the scope between direction of arrow 21-22 from above when observing matrix 2

space

12,13 allow by these fritter thin slices perspectives.Then opposite in the scope between direction of arrow 11-22, this matrix 2 looks it is dark.

Also explanation is represented angle θ with label 18 in Fig. 3 b, doubles with respect to angle 18 by the angle 19 of Fig. 3 c, and is three times of angle 18 at the angle 20 of Fig. 3 d.

Fig. 4 schematically illustrates, and depends on direction of observation 23, has a bright district 24 from+90 ° to 0 ° at angular range, then has a dark region 25 from 0 ° to+90 ° at angular range.

Therefore, adopt given technical regulation can make extraordinary safety label, this safety label can be combined in assignment and the secure file easily false proofly.This type of transparent body can be located in the window-like fragment of this important and secure file and can observe at transmitted light or in reverberation.

Symbol table 1 straightway 16 14 fritter thin slices 2 matrixes 15 fritter thin slices 3 longitudinal sides 16 fritter thin slices, 4 coverage rates, 17 fritter thin slices, 5 coverage rates, 18 angles, 6 thin slices, 19 angles, 7 thin slices, 20 angles, 8 thin slices, 21 directions of arrow, (bright district) 9 longitudinal edges, 22 directions of arrow, (transition zone) 10 directions of arrow, (bright direction) 23 direction of observations, 11 directions of arrow, 13 spaces, 25 dark spaces, 12 spaces, (dark space) 24 clear zones, 26 narrow sides

Claims

1. the safety label that is used for assignment or secure file, comprise a transparent body, it is provided with some devices, and these devices show a kind of image information according to the angle between illumination direction and direction of observation, it is characterized by: these devices are by the mutual almost thin slice (6-8 of overlap joint; 14-17) form, thin slice is arranged in the matrix (2) substantially steppedly.

2. according to the described safety label of claim 1, it is characterized by: thin slice (14-17) is designed to fritter and is arranged in the matrix (2) gradually with rising.

3. according to claim 1 or 2 described safety labels, it is characterized by: the multilayer of thin slice (14-17) is overlapping up and down or be arranged in side by side in the matrix (2).

4. according to the described safety label of claim 3, it is characterized by: some thin slices (14-17) layer takes different zone in the matrix (2).

5. according to claim 3 or 4 described safety labels, it is characterized by: some thin slices (14-16) layer form an angle with each other.

6. according to the described safety label of one of all claims in prostatitis, it is characterized by: it is applicable to transmitted light and/or reverberation.

7. the method for making by one of all claims in prostatitis described safety label comprises the following steps:

-preparation one transparent body (2);

-play the iteration flake structure by start line;

-by light, impression, coating or mechanical treatment this flake structure is imprinted in matrix (2).

8. it is characterized by in accordance with the method for claim 7: use laser.