CN100551717C

CN100551717C - Prevent the safe unit of photocopying

Info

Publication number: CN100551717C
Application number: CN 03812197
Authority: CN
Inventors: R·斯淘布; A·斯玲; W·R·托姆普金
Original assignee: OVD Kinegram AG
Current assignee: OVD Kinegram AG
Priority date: 2002-04-05
Filing date: 2003-04-03
Publication date: 2009-10-21
Anticipated expiration: 2023-04-03
Also published as: RU2004132235A; EP1492677B1; AU2003224033A8; CN1655953A; RU2286887C2; DE10216563B4; WO2003084765A2; AU2003224033A1; WO2003084765A3; EP1492677A2; DE10216563A1

Abstract

Safe unit (2) is cut into a plastics layered combination (1), and is fit to be attached on the substrate (9).Being embedded between the shaping layer (4) of layered combination (1) and the protective layer (7) is reflecting layer (10), the inside first and second structure (5,6) that has been shaped.Safe unit (2) has at least one security feature, and there is a macrostructure (10) lining in the reflecting layer on its surface, and/or be subdivided into first and second local surfaces (32,33) at least.First local surfaces (32) has first structure (5).Second structure (6) is shaped as second local surfaces (33).First and second structure (5,6) is around predetermined angle scope (ε) the intrinsic deflection incident light (11) of minute surface reflection direction, and comprises the item of information of can be visual but can not photocopying, because duplicator cecutiency in this angular region (ε).

Description

Prevent the safe unit of photocopying

The present invention relates to safe unit, relate in particular to a kind of safe unit that in layered combination, has the configuration of optics resulting structure.

This safe unit comprises a kind of picture on surface that contains the surface element of amalgamation as the photocopying protection, and its light correcting principle is formed in the plastics layered combination.Safe unit is used for verifying the authenticity of original paper, especially is fit to protection security and bill, bank note, payment device, ID card and various file, particularly prevents from it is done undelegated photocopying.The effect of security feature is the object that is provided to addressee indication with visual type, and to indicate this object be real but not duplicate in the mode of easy check.After circulating, can prevent with the sort of method unauthorized duplicate object, or at least extremely difficulty is duplicated.But point out that simulation black and white copying machine and the present technical merit of digital color copier make them can make in fact the copy of the file that can't distinguish with not protected element a little while.

This class secure element application the picture on surface of holographic and/or diffraction structure, can obtain understanding from heap file, representative example has EP0105099A1, EP0330738A1 and EP0375833A1.Picture on surface is distinguished with the activity effect in pattern brilliance and the pattern.Diffraction structure is embedded in the thin plastics of one deck, and the form with the marking or mark is attached to such as on the files such as bank note, bill or security, individual passport, the pass, visa, identity card mostly.The color photocopying part of this class safe unit shows multicolour pattern and does not have the activity effect, thereby if the addressee does not notice or illumination difference that then the color photocopying part can be obscured mutually with the safe unit original paper.

Know that from EP0522217 another kind prevents the security feature of uncommitted xcopy.The transfer belt that metallic luster is arranged is attached on the file, and this transfer belt is reproduced as black on duplicate, so form tangible contrast with reflection characteristic on the original paper, the concise messages that this public understands easily is enough to distinguish duplicate and original paper.Regrettably, duplicate can should protect in emulation, thereby can regard duplicate as original paper at illumination difference or in acting hurriedly in a messy situation.

EP0201323B1 has listed the various materials that can produce the layered combination of band safe unit.

The purpose of this invention is to provide a kind of cheap safe unit that is difficult to emulation and comprises the image that a kind of photocopier can't duplicate.

This purpose is realized by a kind of safe unit that is attached to the layered combination on the substrate that comprises; it has the layer of shaping; plastic protective layer and be embedded in the reflecting layer that is shaped between layer and the protective layer; wherein the optics resulting structure of security feature is formed in the layer that is shaped; this security feature has at least one at the minute surface macrostructure of subregion bending and/or be divided into the surface of first and second local surfaces at least; first local surfaces is taken by first structure; and second structure of colour killing is shaped in second local surfaces; the optics resulting structure of security feature is adapted at around the incident lights of 14 predetermined degree angular region (ε) intrinsic deflection parallel relation of minute surface reflection direction, and this security feature comprises that also one can be visual but item of information that can not photocopying.

The present invention has numerous advantages.

Basically in the curved mirror macrostructure of this angular region intrinsic deflection light or two or more basically in the local surfaces of this angular region intrinsic deflection light, make its optics item of information of in surperficial sub-assembly, encoding, and the latter can not photocopying, naked eyes but can be seen.

In this respect, colour killing structure be a kind of basically with the structure of Wavelength-independent ground deflection incident light.

The reflection of colour killing structure, diffraction or scatter incident light basically with Wavelength-independent, thereby in effective observation distance, extremely slight and negligible color effect do not occur or only occur to the beholder.Therefore, the colour killing structure example is macrostructure or bright optical grating construction in this way, and the cycle is 6 μ m or longer, and the profile degree of depth is preferably in 0.25 μ m zone.In addition, the cycle is that the structure of 3～6 μ m presents the colour killing performance variation relevant with the burr degree of depth.

The advantage of using the colour killing structure is, determines that angular region do not consider light fan-out effect, because optical texture is around minute surface reflection direction deflection incident light, thereby can guarantee that the light component beyond the predetermined angle scope is not deflected, and is visible during photocopying.

Claims have proposed all favourable configurations of the present invention.

The all embodiment of the present invention are shown in accompanying drawing, utilize accompanying drawing to make a detailed description below, wherein:

Fig. 1 illustrates the cross section of running through safe unit,

Fig. 2 illustrates the sectional view of copying equipment,

Fig. 3 illustrates the response function figure of copying equipment,

Fig. 4 illustrates a security feature,

Fig. 5 illustrates a macrostructure,

Fig. 6 illustrate band original paper safe unit file and

Fig. 7 illustrates the duplicate of file.

Fig. 1 illustrates the structure of the layered combination 1 that safe unit 2 is cut open.In layered combination 1; label 3 refers to outer cap rock; the 4th, first and

second structure

5,6 is formed in the shaping layer of the inside; 7 is protective layer; the 8th, adhered layer; be used for safe unit 2 is joined to file 9 as substrate, for example Miscellaneous Documents of bill or security, bank note, payment device, identity card or broad sense.

The groove of protective layer 7 first and

second structures

5,6 of filling, thereby the interface that is shaped between layer 4 and the protective layer 7 is the burr shape of first and second structure 5,6.For strengthening the boundary layer reflection, this boundary layer is the form in reflecting layer 10.Reflecting layer 10 comprises the high bright metal of skim, and as Al, Au, Cr, Te etc., layer thickness is 30～100 μ m.In the table 1 of above-mentioned EP0201323B1, listed the inorganic medium of high index of refraction, be suitable as reflecting layer 10.Can produce the additional color effect that attracts people's attention to interfere with layer as reflecting layer 10, its a plurality of layered portion are made up of other metal level and dielectric layer.It for example can be a kind of metal medium bilayer; the contiguous layer 4 that is shaped of its medium; metal level is in abutting connection with protective layer 7; it also can be a kind of three layers; the wherein transparent dielectric layer for example TiO2 of 100～150nm is enclosed in transparent the metal level for example Al of 5nm and reflective metal layer for example between the Al greater than 50nm, the wherein contiguous protective layer 7 of the opaque metal layer of reflection.

Layered combination 1 (not shown) on year paper tinsel of lengthy motion picture combines, and wherein earlier cap rock 3 is added to and carries on the paper tinsel, and order in accordance with regulations adds be shaped layer 4, reflecting layer 10, protective layer 7 and adhesion coating 8 then.If protective layer 7 is binders, just without adhesion coating 8.The burr of first and

second structure

5,6 can form before or after adding reflecting layer 10.At last, safe unit 2 is cut into layered combination 1 and is attached on the substrate 9, remove and unload paper tinsel.Because the cap rock 3 and the layer 4 that is shaped are transparent at least, so the beholder can see the optical effect of first and

second structure

5,6 by the cap rock 3 and the layer 4 that is shaped.

First and

second structure

5,6 is subdivided into first structure 5 and second structure 6, or is synthesized the macrostructure that other back will be discussed.For example, first structure 5 is mirror surface structures, such as lining up the diffraction grating that the smooth mirror surface parallel with layered combination 1 surface or any profile play coloured mirror effect, spatial frequency f greater than 2400 or/mm, and special colour killing optical grating construction.First structure 5 is pressed the reflection law reflection light 11 with parallel relation incident, is angle of reflection β between the minute surface reflection direction such as the incidence angle α between the direction of incident light 11 and layered combination 1 normal to a surface 12 equals to be included in normal 12 and folded light beam 13.The diffraction grating of high spatial frequency f＞2400 lines/mm, such as a part of visible spectrum in the incident light 11 only is diffracted into zero order of diffraction (order) with angle of reflection β.Second structure 6 is colour killing structures, is at most symmetry and the asymmetric zigzag optical grating construction of 300 lines/mm such as spatial frequency, and scattering faintly for example has the matt structure and the kinoform of individual features.

Second structure 6 by shown in direction 39 distinguish, grating vector relates to the local tilt angle gamma on the relative layered combination of this optical grating construction 1 surface in the stable region, γ is at most ± 7 °, is preferably ± 5 °.Fig. 1 illustrates the asymmetric optical grating construction as second structure 6 for example, and direction as shown 39 is towards the right side.

Matt structure is scattering into a scattering cone to incident light 11, and angle of flare is predetermined by the scattering properties of this tarnish structure, and the direction of reverberation 22 is as cone axis.Scattered light intensity is for example maximum on cone axis, along with the distance with cone axis increases and reduces, but wherein along still observed person's perception of light of scattering cone matrix direction deflection.Here be called as in the matt structure of " isotropism ", the cross section of cone and its axis normal is the rotation symmetry.Contrast with " isotropism " matt structure, be called as the composed component of the matt structure of " anisotropy " here, in safe unit 2 planes, a preferred orientations is arranged.In " anisotropy " matt structure, this cross section is reversed, and promptly is out of shape along preferred orientations ovally, and ellipse short shaft is parallel with preferred orientations.In " anisotropy " matt structure, the direction as shown 39 of this preferred orientations and same " anisotropy " matt structure connection all comprises 90 azimuths of spending.

" isotropism " of weak scattering and " anisotropy " matt structure or kinoform, at a narrow scattering cone intrinsic deflection incident light 11, angle of flare ε is 14 ° to the maximum, is preferably 10 °, and it is included between the direction of the

matrix

14,15 of scattering cone and folded light beam 13.For technical reason, the profile height of first and

second structure

5,6 that the layering combination layer is 1 li is limited to lifting changing value H less than 10 μ m, and preferable H value is 0.05～2 μ m.In order to overcome technical barrier, especially under the situation of macrostructure, the H value is not a fixed value in security feature 30, because the scope that helped partly according to the rules by the H value of first and

second structure

5,6 or macrostructure domination has different values.

Fig. 2 illustrates with vertical section and makes modern digital duplicator 16 and all function element thereof that colour or black and white are duplicated.Transparency glass plate 17 is used as the supporting member of file 9, and makes predetermined format, as A4, A3 etc.File 9 is placed on the glass plate 17, pastes safe unit 2 (Fig. 1) and turns to this glass, and file 9 passes through glass plate 17 exposures in fillet, and this fillet extends laterally accross glass plate 17 and file 9 respectively, and in copy operation, fillet moves along glass plate 17.Lighting device 18 comprises roller, linear light sorurce 19 and

focus lamp

20,21, can move (not pointing out) in the direction of arrows along glass plate 17 on the track 34 of roller below glass plate 17.The lighting device 18 of being furnished with roller, light source 19 and

focus lamp

20,21 extends perpendicular to the figure paper plane along width of glass sheet in Fig. 2, and

focus lamp

20,21 concentrates in the fillet by glass plate 17 white light that relative normal 12 (Fig. 1) sends light source 19 substantially symmetrically on file 9.According to the brand of duplicator 16, inciding the incidence angle that the light of file 9 relates to is 40～50 ° and-40～-50 °.Utilize three flat deflecting mirrors 23～25 to enter detector 26 at safe unit 2 and file 9 along the backscattered light 22 of the direction of normal 12.Deflecting mirror 23～25 that tilts and detector 26 are parallel to light source 19 on the whole length of fillet and

focus lamp

20,21 extends.In its longitudinal extent, detector 26 has the photoelectric detector 27 of a plurality of reception back-scattered lights 22 point-blank, and the quantity of unit length photoelectric detector 27 has determined the resolution capability of duplicator 16.Detector 26 is analyzed back-scattered light 22, produces fillet irradiated electric diagram picture on file 9.The analoging reproduction machine has similar guiding device to emission light and the back-scattered light 22 that is used to throw light on.

The curve of Fig. 3 has been drawn the response characteristic AF of duplicator 16 (Fig. 2), it and back-scattered light 22 (Fig. 2) and relevant with respect to the reflection of light angle θ of folded light beam 13 (Fig. 1) diffraction or scattering with arbitrary unit.Being directly adjacent to the minute surface reflection direction is the regional A of folded light beam 13 directions, and the structural design that extends to θ=15 ° 15 ° of duplicators 16 of angular range ε ≈ from θ=0 is predetermined.In regional A, duplicator 16 cecutiency reflect with the minute surface of avoiding detector 26 to receive from glass plate 17 and file 9.Area B comprises 15～75 ° angle of reflection, and duplicator 16 is worked in area B, and back-scattered light 22 is received detector 26.Duplicator 16 no longer detects the back-scattered light 22 from the 3rd zone C (angle of reflection θ＞75 °).Giving an example, is that the back-scattered light 22 on strong scattering surface concentrates on around 45 ° of the angle of reflection θ ≈ from blank sheet of paper.In duplicating, any flat speculum or reflector surface all are rendered into black.

Fig. 4 illustrates the safe unit 2 that is arranged on the file 9.Safe unit 2 has the picture on surface 28 of surface element 29, is furnished with trickle meticulous diffraction structure, minute surface and matt structure.During solar radiation, when rotation or inclination safe unit 2, surface element 29 is flash of light or flicker just, and the optics impression of picture on surface 28 is constantly changed.

With picture on surface 28 or replacement table picture on surface 28, safe unit 2 also comprises a security feature 30.In one embodiment, the surface 31 of this security feature 30 is subdivided into first and second

local surfaces

32 and 33 separately at least, and the former has one first structure 5 (Fig. 1), and the latter is occupied (Fig. 1) by one second structure 6.

Second structure 6 is colour killing structures, is selected from symmetry and asymmetric zigzag optical grating construction that spatial frequency is at most 300 lines/mm, matt structure of weak scattering and kinoform.

First structure 5 is a kind of structures that are parallel to the layered combination surface that are positioned to, be selected from level and smooth minute surface and spatial frequency diffraction grating greater than 2400 lines/mm, and when its direction as shown 39 (Fig. 1) when azimuth with the related direction as shown 39 of second structure 6 differs 25 ° at least, then be selected from zigzag colour killing optical grating construction and " anisotropy " matt structure.

It is favourable that two

local surfaces

32,33 have a public boundary, and wherein local surfaces direct neighbor and/or

local surfaces

32 or 33 are placed in respectively in another local surfaces 33 or 32.In another embodiment, a plurality of a kind of

local surfaces

32 or 33 are placed in respectively on another

local surfaces

33 or 32 that constitutes background, make a plurality of a kind of

local surfaces

32 and 33 constitute one section eye-catching visual information respectively, for example take the form of text and/or icon or image information.Therefore, security feature 30 is also very big, and surface area is at least 0.5cm2, and better for 1cm2, wherein smallest dimension is at least 0.5mm.

Safe unit 2 is cut into the layered combination 1 of plastics, is added to again on the file 9.First and second structure 5,6 (words that have) of security feature 30 and diffraction structure, minute surface and the matt structure of picture on surface 28 surface elements 29 all are configured as reflecting layer 10 (Fig. 1), and are embedded between shaping layer 4 and the protective layer 7.According to the structure of safe unit 2, reflecting layer 10 has macrostructure in the surface 31 of security feature 30, and/or reflecting layer 10 is subdivided into first and second

local surfaces

32,33 at least.First local surfaces 32 is taken by one first structure 5, and the latter is parallel to the surface of layered combination 1, along the minute surface reflection direction incident light 11 is deflected to reverberation 13 (Fig. 1).One second structure 6 is formed second local surfaces 33, and at the predetermined angular region intrinsic deflection incident light 11 of scattering cone, the angle of flare that centers on the minute surface reflection direction is ε (Fig. 1).

Fig. 5 illustrates the structure of the security feature 30 of a macrostructure 35.With first and second local surfaces 32 and 33 (Fig. 4) of discrete arrangement or replace these local surfaces, single surperficial 31, the macrostructure 35 of surface portion bending also insert security feature 30.Macrostructure 35 is embedded in the reflecting layer 10 that is shaped between layer 4 and the protective layer 7, partly has warp architecture 36 in predetermined surface.The profile of macrostructure 35 is very level and smooth in fine region, perhaps this profile kinoform of a matt structure or trickle meticulous diffraction grating that overlapping, and the spatial frequency of diffraction grating is greater than 2400 lines/mm.The profile of macrostructure 35 is function M (x, y) of coordinate x, y, has determined the surface 31 of security feature 30, wherein at least in the regional area of macrostructure 35, and Δ M (x, y) ≠ 0.Warp architecture 36 is followed known mathematical functions and for example border such as graphic character or letter or the form by function M (x, y) decision, and perhaps macrostructure 35 is a kind of from coin or the known relief pattern of embossment.With respect to the surface of layered combination 1 (Fig. 1), the tangent plane of macrostructure 35 does not all have local tilt γ greater than ± 7 ° at any point.In one embodiment, the reflecting layer 10 of macrostructure 35 is the interfere with layer form.

Therefore, macrostructure 35 has macroscopic optical effect, and the spacing that relates to respect to all consecutive points of the profile altitudinal belt extreme value of this macrostructure is at least 0.3mm.For technical reason, in layered combination 1, the structure 5,6 (Fig. 1) that preparation is shaped, 35 variate H are limited to about 10 μ m, and macrostructure 35 is at layer 4 internal shaping that are shaped, and the high mould value of type is H.As a result of the interrupted position 37 of Chu Xianing is not considered extreme value.

Fig. 6 illustrates the plane of file 9 original papers.In this embodiment, security feature 30 has the alphabetical OK as item of information, and it also has first local surfaces 32 with first structure 5 (Fig. 1) as a setting by forming with second local surfaces 33 of second structure 6 (Fig. 1).When the item of information of security feature 30 or second local surfaces 33 are used white light, with respect to bright background with first local surfaces 32 of first structure 5, be reflected into grey In the view of the beholder by minute surface, because second structure 6 of second local surfaces 33 makes the eyes of incident light 11 (Fig. 1) deflection by the beholder.

Just clear with reference to Fig. 1.When for simplicity's sake, not considering 1 transition of air stratification sub-assembly to the refraction action of light beam.First structure 5 that first local surfaces is 32 li is along the direction deflection of reverberation 13 light 11 with incidence angle α incident, and this moment, the azimuth of above-mentioned first structure 5 was unimportant.If light 11 is incident on the optical grating construction of second structure 6 that local tilt is γ, then incidence angle α will reduce this local tilt γ, because normal 12 has comprised this local tilt γ with surface perpendicular to the optical grating construction inclined plane.In asymmetric optical grating construction, local tilt is corresponding to showing off the angle.Optical grating construction is along reverberation direction deflection incident light 11, and in the case, angle of reflection also reduces local tilt with respect to surface normal, and reduces by two times γ value with respect to normal 12.Since inclination angle γ is at most ± 7 °, so differed at the most by the direction of the light of optical grating construction deflection and reverberation 13 ± 14 °.If the beholder arbitrarily rotates and tilts to have the file 9 (Fig. 6) of safe unit 30, the grating vector of the optical grating construction of its direction of observation and second structure 6 is in the isoplanar, because the direction of reverberation 13 is pointed to beholder's eyes, so second local surfaces 33 is suddenly brighter than the background of first local surfaces 32.If above-mentioned " isotropism " matt structure is used as second structure 6 of 33 li of second local surfaces, scattered light just is distributed in the scattering cone that

matrix

14,15 determines, and is irrelevant with the azimuth.In the direction of reverberation 13, the light 13 of light ratio first local surfaces 32 reflections of second local surfaces, 33 scatterings is more weak.In a certain zone of scattering cone, scattered light intensity is stronger than the scattered light intensity of minute surface, and promptly second local surfaces, 33 to the first local surfaces 32 are brighter.Scattered light intensity reduces rapidly towards scattering cone surface, thereby in scattering cone outside, second local surfaces 33 is darker than first local surfaces 32 once more.Strength Changes between the

local surfaces

32,33 of security feature 30 is exactly an authentication feature.

In the security feature 30 of another kind of structure, what arrange as first structure 5 32 li of first local surfaces is zigzag colour killing optical grating construction or " anisotropy " the matt structure with first direction as shown 39, and what be formed in 33 li of second local surfaces as second structure 6 is zigzag colour killing optical grating construction or " anisotropy " matt structure, wherein at least aspect the azimuth, its direction as shown 39 is different from first direction as shown 39.In one example, the zigzag colour killing optical grating construction of first structure 5 is mirror images of second structure 6.

Therefore, the surface brightness maximum with

local surfaces

32,33 of colour killing optical grating construction not only appears in azimuthal narrow angular region, and the colour killing optical grating construction is pressed pixel and arranged.In each pixel, the polygon of colour killing optical grating construction or circular trough have constant spatial frequency f.The grating vector of these optical grating constructions is radially indication outwardly from the pixel center.For example forms with the information of

local surfaces

32 and 33 expressions respectively, wherein the corresponding grating vector parallel orientation of each pixel or by the pattern orientation of being scheduled to by the square pixel that the length of side is at least 0.5mm.When rotating safe unit 2, predetermined pattern makes maximum surface brightness respectively in

local surfaces

32 and 33 activities.

Use various colour killing optical grating constructions in a large amount of another

local surfaces

32 and 33 on the background that is placed in a

local surfaces

33 and 32 respectively, can obtain another advantage of security feature 30.In one embodiment, in three

local surfaces

32 and 33, grating vector is oriented to be parallel with direction as shown 39 respectively.When safe unit 2 when the axis that is parallel to direction as shown 39 tilts,

local surfaces

32 and 33 obtains maximum surface brightness continuously.For example these three

local surfaces

32 and 33 have the colour killing optical grating construction that spatial frequency f is 160 lines/mm, three optical grating constructions show off angle or changing value difference, its value is 150nm, 250nm and 400nm.Otherwise if the colour killing optical grating construction relates to same profile and different direction as shown 39, then when safe unit 2 winding lines 12 rotated,

local surfaces

32 and 33 just obtained their maximum surface brightness continuously.In another embodiment, show off the angle and direction as shown 39 boths change to another local surfaces from a

local surfaces

32 and 33.

Fig. 7 illustrates the duplicate of original paper shown in Figure 6.Because duplicator 16 (Fig. 2) is in regional A and C (Fig. 3) deepening, so duplicator only copies in the picture on surface 28 (Fig. 5) light scattering or is diffracted into those surface elements 29 of area B (Fig. 3) lining.For example one of rectangular surface element 29 ' have oneself can be the diffraction grating of optical diffraction in the area B in Fig. 6, but its diffraction grating vector is not oriented orthogonal to the light-emitting section of duplicator 16 in the plane of glass plate 17 (Fig. 2), thereby surface element 29 ' do not satisfy copy condition.Yet, if the intensity of square surface element 29 ' backscattered light 22 (Fig. 2) is not really low, duplicator 16 can both with light secondary colour or this square surface element 29 of grey color reproduction '.By safe unit 2 is rotated in its plane, surface element 29 is differently directed on glass plate 17 (Fig. 2).Its diffraction grating vector in fact be oriented orthogonal to now the square surface element 29 of light-emitting section ', now can be along the direction of back-scattered light 22 diffraction incident light 11 (Fig. 1) fully; Conversely, the strength grade of other surface element 29 is lower, or is actually zero, thus picture on surface 28 (Fig. 6) duplicate the orientation that depends on the glass plate (Fig. 2) of duplicator 16.

Contrast with it, security feature 30 is in the effect difference of each azimuth direction, because first and second structure 5,6 (Fig. 1) of local surfaces 32,33 (Fig. 6), incident light 11 is deflected in regional A and the C, thereby when duplicating, the surface 31 of security feature 30 becomes black with monochromatic reconstruction, and is irrelevant with the azimuthal orientation of file 9 on the glass plate 17 of duplicator 16.Therefore, security feature 30 contains the item of information of can be visual but can not photocopying.The advantage of this security feature 30 is not rely on its azimuthal orientation with respect to duplicator 16.

In another embodiment of safe unit 2, surface element 29 for example extends with the form of narrow shape belt 38 on security feature 30, at least one surface element 29 is one of crooked shape, guilloching, web form, and surface 31 is divided into littler local surfaces 32,33.When safe unit 2 is in predetermined orientation, look like extremely bright lines with 38 the people who watches original paper, the live width with 38 has 0.05mm just much of that; Preferably, live width is 0.1～0.3mm.Utilization is with 38 can prevent that security feature 30 is directly imitated by homemade aluminium foil.

Claims

1. safe unit (2) that comprises the layered combination (1) that is attached on the substrate (9); described layered combination (1) comprises be shaped layer (4), plastic protective layer (7) and reflecting layer (10); reflecting layer (10) is embedded between the shaping layer (4) and protective layer (7) of layered combination (1); wherein first and second structure of security feature (30) (5,6) is shaped as reflecting layer (10); it is characterized in that

At least the one side (31) of security feature (30) has an optical information item, wherein reflecting layer (10) get minute surface macrostructure (35) form with smooth profile, the information relief image that it forms in regional area is bent, type height with respect to macrostructure (35) has all consecutive points of extreme value at least at a distance of 0.3mm, and with respect to the surface measurement of layered combination (1), the local tilt of last any point of macrostructure (35) and macrostructure (35) tangent plane (± γ) all not greater than 7 °, thereby in 14 ° of predetermined angle scopes (ε) of minute surface reflection direction (13), surface (31) with macrostructure (35) compatibly deflects into the light (11) with parallel relation incident on the surface of layered combination (1) by a certain angle [alpha] with respect to normal (12), make the optical information item can be visual and can not photocopying, the angle of reflection β that forms between wherein said minute surface reflection direction (13) and the normal (12) equals α.

2. safe unit as claimed in claim 1 (2) is characterized in that, the profile of macrostructure (35) structure that overlaps, this structure is selected from matt structure, kinoform and diffraction grating, diffraction grating play a part coloured mirror, and its spatial frequency (f) is greater than 2400 lines/mm.

3. safe unit (2) that comprises the layered combination (1) that is attached on the substrate (9); described layered combination (1) comprises the layer (4) that is shaped; plastic protective layer (7) and reflecting layer (10); this reflecting layer is embedded between the shaping layer (4) and protective layer (7) of layered combination (1); and be shaped first and second structures (5 of security feature (30) of the inside; 6); wherein at least one mask of security feature (30) has at least by first and second local surfaces (32; 33) the optical information item of Gou Chenging; it is characterized in that

First local surfaces (32) contains one of first structure (5), second local surfaces (33) contains one of second structure (6) of colour killing, second structure (6) is a mirror surface structure, the local tilt of second structure (6) of colour killing (± γ) at the most 7 °, and in 14 ° of angular regions (ε) of being scheduled to along minute surface reflection direction beam reflected by layered combination (1) surface, first and second structure (5,6) be suitable for with respect to normal (12) at an angle (α) deflect on layered combination (1) surface by the light (11) of parallel relation incident, make that the optical information item can be visual and can not photocopying.

4. safe unit as claimed in claim 3 (2) is characterized in that, first structure (5) is to be arranged to the level and smooth minute surface that is parallel to layered combination (1) surface.

5. as claim 3 or 4 described safe units (2), it is characterized in that first structure (5) is a diffraction grating, it is parallel to layered combination (1) surface, and any profile is arranged, and its spatial frequency (f) is greater than 2400 lines/mm, and is used as coloured mirror.

6. as claim 3 or 4 described safe units (2), it is characterized in that second structure (6) is the zigzag optical grating construction, the cycle is not less than 6 μ m, direction as shown (39) is corresponding to grating vector, and the angle of showing off of second structure (6) is local tilt (γ).

7. safe unit as claimed in claim 3 (2), it is characterized in that, first structure (5) and second structure (6) all are the zigzag optical grating constructions that is not less than 6 μ m the cycle, it is shown off the angle and has comprised local tilt (γ), and first and second structure (5,6) is different on corresponding to the azimuth of its direction as shown (39) of grating vector.

8. as claim 3 or 4 described safe units (2), it is characterized in that, second local surfaces (33) is divided into all pixels, in each pixel, the colour killing optical grating construction of sawtooth profile has polygon or circular groove, the spatial frequency of zigzag optical grating construction is 300 lines/mm at the most, and local tilt (γ) is as showing off the angle.

9. as claim 3 or 4 described safe units (2), it is characterized in that, second structure (6) is selected from the matt structure and the kinoform of weak scattering, and second structure (6) is scattered in incident light (11) in the narrow scattering cone in predetermined angular region (ε).

10. as claim 3 or 4 described safe units (2), it is characterized in that, go up a plurality of second local surfaces (33) that arrangement has second structure (6) in first local surfaces (32), and second structure (6) is in local tilt (γ) and/or upward different corresponding to the direction as shown (39) of grating vector with one of first structure (5).

11. as claim 1 or 3 described safe units (2); it is characterized in that; reflecting layer (10) is a kind of multilayer interfere with layer that comprises dielectric layer and metal level, wherein to the transparent layer of light (11) towards the layer (4) that is shaped, opaque metal level is towards protective layer (7).

12. safe unit as claimed in claim 11 (2) is characterized in that dielectric layer is transparent, comprises TiO ₂, thickness is 100～150nm.

13. safe unit as claimed in claim 12 (2) is characterized in that, being shaped has a transparent metal level between layer (4) and the dielectric layer.

14., it is characterized in that reflecting layer (10) are the metal levels that is selected from aluminium, gold, chromium and tellurium as claim 1 or 3 described safe units (2).

15., it is characterized in that the forming height of structure (5,6,35) deducts the modular function with mould value (H) as claim 1 or 3 described safe units (2), the number range of mould value (H) is 0.05～10 μ m.

16. as claim 1 or 3 described safe units (2), it is characterized in that, security feature (30) is surrounded by the surface element (29) of the different structure with optical diffraction effect that the parquets shape is arranged, and the parquets shape is arranged the picture on surface (28) of forming a kind of optically-variable.

17. the safe unit (2) as claim 16 is characterized in that, at least one line strip surface element (29) of picture on surface (28) is gone up with the form of band (38) at security feature (30) and is extended.