CN104245346A - Optically variable security element - Google Patents
Optically variable security element Download PDFInfo
- Publication number
- CN104245346A CN104245346A CN201380019304.6A CN201380019304A CN104245346A CN 104245346 A CN104245346 A CN 104245346A CN 201380019304 A CN201380019304 A CN 201380019304A CN 104245346 A CN104245346 A CN 104245346A
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- China
- Prior art keywords
- micropore
- security element
- microlens
- recording layer
- sublayer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/346—Perforations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/43—Marking by removal of material
- B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
Abstract
The invention relates to an optically variable security element (12) for security papers, documents of value and other data carriers, having a substantially transparent carrier (20) with first and second main surfaces (22, 24) located opposite one another, having an arrangement of microlenses (26) on the first main surface (22) of the carrier, having a laser-sensitive recording layer (30), which is arranged on the second main surface (24) of the carrier and contains first and second sub-layers (32, 34) arranged one above the other, wherein the first sub-layer (32) is arranged between the carrier (20) and the second sub-layer (34), and having a multiplicity of microholes (40) which are generated in the laser-sensitive recording layer by the action of laser radiation and of which each microhole (40) is assigned to a microlens (26) and, with the security elements being viewed from a certain viewing angle, can be seen through the associated microlens (26), wherein the multiplicity of microholes comprise a multiplicity of first and a multiplicity of second microholes (42, 44) wherein the first microholes (42) are present in the first sub-layer (32), and do not pass through the recording layer (30), and the second microholes (44) pass through the recording layer (30) with the first and second sub-layer (32, 34), and wherein the diameter of the first microholes (42) is larger than the diameter of the second microholes (44).
Description
Technical field
The present invention relates to a kind of optically variable security element for cheque paper, value document and other data medium, a kind of method for the manufacture of this Security element and a kind of data medium with this Security element.
Background technology
In order to protect; data medium (such as value document or identification document) and other valuables (such as brand objects) have Security element usually; described Security element allows the authenticity of authentication data carrier, and serves as the safeguard procedures to unauthorized copying simultaneously.
The Security element with the effect depending on visual angle has effect, because they even can not be copied by state-of-the-art duplicator in protection authenticity.At this, Security element has optically variable element, and from different visual angles, optically variable element presents different image impression to beholder, and according to visual angle indication example as other color or brightness impression and/or other pictorial pattern.
Such as, the ID card of such as credit card or personal identity card individualizes by laser engraving for a long time.By laser engraving individualized in, to expect that the form marked suitably guides laser beam irreversibly can change the optical properties of base material.This laser labelling makes personalization and the Security element of data medium capable of being combined, and more freely they is incorporated in printing images than conventional personalized (than method for numbering serial as is known).
Document EP0 219 012 A1 describes a kind of identity card with part lens lattice.Via this lens pattern, information segment utilizes laser to inscribe in identity card with different angles.Therefore, these information segments also can only be perceived with described angle, make, when inclination identity card, to present different information segment.
Summary of the invention
Based on this, the object of the present invention is to provide a kind of Security element with the above-mentioned type of attracting visual appearance and high anti-counterfeiting.
This object is realized by the feature of independent claims.Development example of the present invention is the theme of dependent claims.
According to the present invention, general Security element comprises:
The substrate of-substantially transparent, has the first and second relative first type surfaces;
-the device that is made up of microlens, is arranged on the first first type surface of substrate;
-laser-sensitive recording layer, is arranged on the second first type surface of substrate, comprises the first and second stacking sublayers, and the first sublayer is arranged between substrate and the second sublayer;
-acting in laser-sensitive recording layer by laser emission the multiple micropores produced, each micropore is associated with microlens, and when from certain viewing angles viewing Security element, described micropore is visible via the microlens be associated;
-described multiple micropore comprises multiple first and multiple second micropore, and the first micropore is present in the first sublayer, and can not pass through recording layer, and the second micropore is by having the recording layer of the first sublayer and the second sublayer; And
The diameter of the-the first micropore is greater than the diameter of the second micropore.
The lens that size is less than discernable by eye rate are called microlens.Microlens preferably develops into sphere or aspheric, and such as in banknote, advantageously has the diameter between 5 μm and 10 μm, preferably between 10 μm and 50 μm, particularly preferably between 15 μm and 20 μm.For card application, microlens also can be larger, and have the diameter such as between 100 μm and 300 μm.In the design, microlens also can develop into cylindrical lens.
The diameter of the first micropore preferably larger than the diameter of the second micropore more than 10%, especially more than 20%, particularly preferably more than 30%.But the diameter of the first micropore is suitably not more than 4 times of the second micro-pore diameter, is especially not more than 3 times.Due to the amplification effect of microlens, even if the minute differences of the hole dimension of the first and second micropores also can cause the remarkable contrast differences of reverberation effect or transmitted light effect, as hereafter will explained in detail.
In advantageous embodiment, the diameter of the second micropore is between 2 μm and 4 μm, and the diameter of the first micropore is between 3 μm and 8 μm.In order to remarkable contrast differences, such as, larger than the diameter of the second micropore 0.5 μm to 4 μm of the diameter of the first micropore.
In advantageous embodiment, micropore is all less than the microlens be associated.At this, micropore and the area ratio of the microlens be associated can be less than 1.0 or be less than 0.5, are less than 0.2 or be even less than 0.1.
In simple designs, the first and second micropores all develop into circular or linear.But, also the first and/or second micropore can be developed into pattern form, such as geometry, such as square, triangle or star, or micro-character style, such as alphabetical, digital etc., so that extra hiding anti-counterfeiting characteristic is incorporated in Security element.The development example of pattern form is especially appropriate for the first larger micropore.
Although the first micropore is at least different from the second micropore in their size and their shape (if desired), the first micropore itself is advantageously all of similar shape and size, and the second micropore is also like this.
First micropore advantageously generates the first pattern of figure, character or coding form, when under reflected light from the first preselected view direction viewing Security element, first pattern is appreciable, second micropore forms the second pattern of figure, character or coding form, when in transmitted light from the second preselected view direction viewing Security element, the second pattern is appreciable.First and second patterns are normally different, but also can be identical.In addition, the first and second view directions are preferably different, but also can be identical.
In expedients, the first and second micropores are arranged independently of one another.In the expedients that other is similar, the second micropore be positioned at the first micropore completely at least partially.Such as, the second micropore more than 50%, the first micropore can be positioned at completely more than 75% or all second micropores.So, can produce " pattern in pattern ", wherein, transmitted light pattern manifests in reflected light pattern.Such as, Security element can comprise the visible under reflected light and decorations chapter formed by the first micropore, therein, when switch to watch in transmitted light time, the mark formed by the second micropore is visible.In this case, advantageously the first and second view directions are chosen to identical.
In advantageous embodiment, laser emission is utilized to be introduced in recording layer by the first and/or second micropore via microlens device from different directions.When seeing a little afterwards, under reverberation or transmitted light, micropore can be perceived from the corresponding view direction introducing micropore.At this, as mentioned above, the first micropore can all perceive from the first view direction, and the second micropore can all perceive from the second different view direction.
But, also can introduce the first micropore group from a direction, introduce another the first micropore group from other direction.So, the first pattern displaying formed by the first micropore goes out tilted image or alternate images, and their subgraph is formed by the first different micropore groups.In addition, the embodiment had more than two incoming directions or direction change is continuously possible.Or or extraly, in the same manner, also can introduce the second micropore from two or more different directions.
Can be associated in meaning from the visible pattern part of different view direction or subgraph, such as, as handspring book (flip-book), and illustrate the image sequence of advancing before beholder when Security element tilts.If introduce angle change and visual angle consecutive variations thus, then the transparency that pattern presents when Security element tilts and brightness thus change continuously.
First and second sublayers of recording layer are advantageously formed by metal level, and the layer such as constructed by the alloy (such as made of Al-Cu alloy) of aluminium, copper, silver, gold, chromium, nickel, tungsten, palladium or these metals is formed.First and second sublayers are advantageously formed by the metal level with different colours, such as aluminium and copper.In order to ensure the extra high visibility of reflected light pattern, the second sublayer is advantageously formed by the high reflecting metal layer with 90% or more high reflectance, such as, formed by the aluminium of gas deposition or silver layer.
Advantageously, the first and/or second sublayer is opaque, and when its transmissivity is less than 1% under visible light, when being especially less than 0.1%, this layer is called opaque.
In expedients, recording layer is made up of the first and second sublayers, so do not comprise other layer.
But, also can imagine the embodiment between the first and second sublayers that other layer one or more be arranged in recording layer.Especially, the one or more layers through laser can be present between the first and second sublayers, the dielectric layer be such as made up of SiO2 (silica).This additional layer can use such as generation of particular color and/or gamut effect, and/or serves as bonding enhancement layer.In addition, described sublayer similarly can be formed by the multiple individual courses comprising neutral line equally.
As illustrated more in detail below, the diameter of the micropore in identical recordings layer or surface area difference allow two kinds of discrete appearance of encode false-proof element under lower for reverberation viewing to transmitted light to encode.Summarize simply, when watching under reflected light, beholder sees the second sublayer of high reflection via sizable first micropore, and the second less micropore is non under reflected light, especially due to their small size.Therefore, due to the high reflectance of the second sublayer, the first pattern formed by the first micropore is under reflected light by perception well, and the second pattern keeps hiding.
In transmitted light, sufficient light is also through the second smaller micropore, and with can the second pattern of being formed by described second micropore of perception, and the first pattern be made up of the first micropore be present in the first sublayer keeps hiding due to the opacity of the second sublayer.
The first micropore be present in the first sublayer preferably can not extend in the second sublayer.But in fact, if direct one of the first and second sublayers are positioned at above another stacking, then due to production reason, hole extends into that (that is, to be less than 1/10 of layer thickness or to be even less than 1/20) in the second sublayer be harmless a little.Important only, the rest layers thickness of the second sublayer has sufficiently high reflectivity and sufficiently high opacity.
In Advantageous developments example of the present invention, Security element comprises micro-optics graphic display unit simultaneously, especially More's amplifying device, More's type micro-optics amplifying device or modulus amplifying device.The general principle of this micro-optics graphic display unit is illustrated at document WO2009/000528 A1, and the disclosure of the document is incorporated to this description as quoting.In this case, Security element preferably has the pattern image being divided into multiple unit between substrate and recording layer, be furnished with the imaging region of predetermined background patterns in each cell, when microlens device is formed in viewing graphic pattern image, rebuild the microlens grid of background patterns according to the imaging region arranged in the cells, which.
Pattern image is advantageously rendered as the relief pattern being arranged in and impressing between substrate and recording layer in enamelled coating (embossing lacquer layer).At this, especially can be arranged to, the first and second sublayers, along the relief printing plate of impression enamelled coating, namely have substantially identical relief pattern.
In a modified example of the present invention, the cover layer that microlens device can have translucent cover layer and/or exist only in some regions.But current, preferably, microlens device does not damage or eliminates the applied layer of microlens optical effect.
The present invention also comprises data medium, is especially value document, and such as banknote, passport, certificate, identity card etc., it has the Security element of described type.In an Advantageous variants example of the present invention, Security element can be especially arranged among the window area of data medium or through hole or on.
The present invention also comprises the method for a kind of manufacture for the optically variable security element of cheque paper, value document and other data medium, wherein:
-provide the substantially transparent substrate with the first and second relative first type surfaces, by the Plant arrangement that is made up of microlens on the first first type surface of described substrate;
-laser-sensitive recording layer is arranged on the second first type surface of described substrate, described laser-sensitive recording layer comprises the first and second stacking sublayers, and described first sublayer is arranged between described substrate and described second sublayer;
-produce multiple micropore by acting in described laser-sensitive recording layer of laser emission, each micropore is associated with microlens, and when from certain viewing angles viewing Security element, described micropore is visible via the microlens be associated;
-described multiple micropore comprises multiple first and multiple second micropore, and producing in described first sublayer can not by described first micropore of described recording layer, and described second micropore is produced into the recording layer by having the first sublayer and the second sublayer; And
The diameter of the first micropore of-production is greater than the diameter of the second micropore.
In an Advantageous developments example of the method, laser emission is utilized to be introduced in recording layer by the first and/or second micropore via microlens device from different directions.
In a favorable method modified example, in a first step, by second first type surface acting on described substrate of laser emission only being produced first sublayer with multiple first micropore of laser-sensitive recording layer, in the second step, second sublayer of described laser-sensitive recording layer is arranged in described first sublayer, described second micropore is produced into the recording layer by having the first and second sublayers.
Another optically variable security element for cheque paper, value document and other data medium comprises:
The substrate of-substantially transparent, has the first and second relative first type surfaces;
-the device that is made up of microlens, is arranged on the first first type surface of described substrate;
-laser-sensitive recording layer is especially metal level, is arranged on the second first type surface of described substrate;
-printed layers is especially ink layer, arranges on the recording layer;
-act on by laser emission the multiple micropores produced in described laser-sensitive recording layer, each micropore is associated with microlens, and when from certain viewing angles viewing Security element, described micropore is visible via the microlens be associated, and each micropore is less than the microlens be associated;
-at least one gap area of being produced in the recording layer by the effect of laser emission, the size of at least one gap area described is greater than the size of described microlens;
-at least one gap area described forms the first pattern of figure, character or coding form, and when watching Security element under reverberation and transmitted light, described first pattern is perceived as the outward appearance with printed layers; And
-described microlens forms the second pattern of figure, character or coding form, only when in transmitted light from preselected view direction viewing Security element, second pattern described in ability perception, from this view direction, described second pattern and described first pattern complementary are to form complete pattern.
At least one gap area described forms naked eyes visible pattern, and it is not having servicing unit, can be seen when especially not amplifying by naked eyes via microlens.Its minimum dimension is greater than 0.5mm usually, is generally several millimeters.The material of printed layers can but and nonessentially to penetrate in micropore and/or gap area.Microlens device does not preferably damage or eliminates the applied layer of microlens optical effect.Recording layer can be the aluminium lamination that such as 50nm is thick, has printed layers, the red enamelled coating of the solvent-borne type such as impressed.Security element can be applied to the data medium in transmitted light with specific transmission, such as bank-note paper.In expedients, Security element to be arranged among the window area of data medium or through hole or on.
Accompanying drawing explanation
Below with reference to the accompanying drawings other exemplary embodiment of the present invention and advantage are described, in accompanying drawing, do not carry out the definition drawing to improve them in proportion.
In accompanying drawing:
Fig. 1 is the schematic diagram of the banknote of creative optically variable security element, and optically variable security arrangements of elements is on the through hole of banknote;
Fig. 2 schematically shows the cross section of the Rotating fields according to Security element of the present invention;
(a) and (b) of Fig. 3 illustrates two intermediate steps of the Security element of shop drawings 2;
Fig. 4 is when watching in the past, the visual appearance of the Security element of Fig. 2, a () and (b) illustrates under reflected light from the outward appearance of two view directions, (c) and (d) illustrates in transmitted light from the outward appearance of two view directions; And
Fig. 5 is when from rear viewing, the visual appearance of the Security element of Fig. 2 (a) and (b) in transmitted light under reflected light.
Detailed description of the invention
The example that present use is used for the Security element of banknote illustrates the present invention.For this reason, Fig. 1 illustrates the schematic diagram of the banknote 10 of creative optically variable security element 12, and optically variable security arrangements of elements is on the through hole 14 of banknote 10.In transmitted light, independent of view direction, Security element 12 is shown as translucent in subregion, and in each situation of reverberation and transmitted light, can from its front and the viewing of its rear because of its application on opening 14.
For each direction in these different view directions, Security element 12 shows different visual appearance, and this causes high attention value and high resolution.
Fig. 2 schematically shows the cross section of the Rotating fields according to Security element 12 of the present invention, only needs a part of Rotating fields so that the shown principle of work and power to be described.
Security element 12 comprises the substrate 20 of substantially transparent, and it is formed by transparent plastic paillon foil usually, such as about 20 μm of thick PETG (PET) paillon foils.Substrate 20 has the first and second relative first type surfaces, and the first first type surface 22 has the device of microlens 26.In example shown embodiment, microlens 26 is arranged with the formal rule of microlens grid, and formation has preselected symmetric two-dimentional Bravias lattice on the surface of substrate foil.Such as, the Bravias lattice of microlens 26 can have hexagon grid symmetry, or also has low-symmetry, the such as symmetry of parallelogram grid.
In the exemplary embodiment, the microlens 26 of sphere or aspheric design preferably has the diameter between 15 μm and 30 μm, and can not be perceived by naked eyes thus.The thickness of substrate 20 and the curvature coordination with one another of microlens 26, make the focal length of microlens 26 substantially be equivalent to the thickness of substrate 20.
Second first type surface 24 of substrate 20 is furnished with laser-sensitive recording layer 30, first sublayer 32 be made up of two stacking sublayers be arranged between substrate 20 and the second sublayer 34.First and second sublayers 32,34 are preferably formed by the metal level of different colours, and the second sublayer presents the extra high reflectivity of 90% or larger.For this reason, in example shown embodiment, the first sublayer 32 is formed by 100nm thick copper layer, and the second sublayer 34 is formed by the thick aluminium lamination of 50nm, and their adjoining land vapour depositions on the substrate 20.
In addition, by the effect of laser emission, multiple circular micropore 40 is introduced in recording layer 30.At this, a part (being hereafter called the first micropore 42) for micropore exists only in the first sublayer 32, and can not pass through recording layer 30.Another part (being hereafter called the second micropore 44) of micropore is by having the recording layer 30 of the first and second sublayers 32,34.
Multiple first micropore 42 forms the first pattern 46 together, is mark " G+D " in the exemplary embodiment, can perception first pattern (Fig. 4 (b)) when watching Security element from the first preselected view direction under reflected light.Multiple second micropore 44 forms the second pattern 48 together, is alphabetical to " PL " in the exemplary embodiment, can perception second pattern (Fig. 5 (b)) when watching Security element from the second preselected view direction in transmitted light.
At this, the first micropore 42 presents the diameter of 6 μm, and the second micropore presents the diameter of only 4 μm.The diameter of the first micropore 42 is (6 μm/4 μm)=1.5 times of the diameter of the second micropore 44 thus.Correspondingly, the surface area of the first micropore 42 is that (6 μm/4 μm) 2=2.25 of the surface area of the second micropore 44 is doubly large.So, on the one hand, realization, only can see the first pattern 46 under reflected light, and can not see the second pattern 48.On the other hand, by the high reflectance of the first large micropore 42 and the second sublayer 34, the bright outward appearance of the first pattern is determined.
The observability that first and second patterns only select view direction from particular pre-selected produces the direct result of micropore.See Fig. 3, in order to manufacture Security element 12, first preferably layers of copper 32 thick for 100nm being applied to the second first type surface of substrate 20 in vacuum vapor deposition process, to this, applying the aluminium lamination 34 that 50nm is thick.In these layer thickness situations, cover layer 32 and aluminium lamination 34 are opaque.And aluminium lamination 34 presents the extra high reflectivity being greater than 90%.
Then, clash into the substrate of coating with laser emission (radiation of such as Nd:YAG, Nd:YVO4 or fibre laser) along the view direction of expectation after a while 50 of the second pattern from microlens 26 side.Laser emission focuses on recording layer 30 by microlens 26, as shown in the reference number 52 of Fig. 3 (a).At this, it is all ablated that laser energy or laser power are chosen to both the first sublayer 32 and the second sublayer 34, makes to produce to have 2 to 4 μm of diameters and by circle second micropore 44 of recording layer.At this, laser beam was advanced the surf zone of the second pattern 48, made whole second micropore 44 form the second pattern 48.
Then, then clash into along the view direction 54 of expectation after a while of the first pattern the substrate applied with laser emission from microlens 26 side.Laser emission focuses on recording layer 30 by microlens 26, as shown in the reference number 56 of Fig. 3 (b).For laser energy or laser power, in this step, be chosen to substantially only ablation first sublayer 32, and can not ablation second sublayer 34.In order to produce the more high surface area of the first micropore 42, such as, the direction of illumination of laser can tilt to become round shape by a small margin about expectation view direction 54.So, circle first micropore with the diameter of 3 to 8 μm is produced.In addition, laser beam was advanced the surface of the first pattern 46, made whole first micropore 42 form the first pattern 46.
Via the method, attainable, each micropore 42,44 is associated with microlens 26, via microlens 26, generate micropore 42,44 when laser light strikes, via microlens, due to the invertibity of light path, micropore can be seen when watching Security element subsequently.
In an alternative modified example, not shown at this, in order to manufacture Security element 12, first preferably layers of copper 32 thick for 100nm is applied to the second first type surface of substrate 20 in vacuum vapor deposition process.Then, along the view direction of expectation after a while 54 of the first pattern from microlens 26 side laser emission (such as Nd:YAG, Nd:YVO
4or the radiation of fibre laser) clash into the substrate being coated with layers of copper 32.Microlens 26 laser focusing radiation on the first sublayer 32.At this, it is ablated that laser energy or laser power are chosen to the first sublayer 32, produces circle first micropore with the diameter of 3 to 8 μm.In order to produce the more high surface area of the first micropore 42, such as, the direction of illumination of laser can tilt to become round shape by a small margin about expectation view direction 54.At this, laser beam was advanced the surf zone of the first pattern 46, made whole first micropore 42 form the first pattern 46.
Afterwards, aluminium lamination 34 thick for 50nm is applied to (preferably gas deposition to) layers of copper 32.Then, the view direction 50 of expectation after a while along the second pattern clashes into the substrate applied with laser emission from microlens 26 side.Laser emission is gathered on recording layer 30 by microlens 26.At this, it is ablated that laser energy or laser power are chosen to both the first sublayer 32 and the second sublayer 34, makes to generate circle second micropore 44 (having the diameter of 2 to 4 μm) by whole recording layer 30.At this, laser beam was advanced the surface of the second pattern 48, made whole second micropore 44 form the second pattern 48.
Fig. 4 illustrates when from the first first type surface 22 side (front) viewing, the visual appearance of the Security element 12 of generation like this, (namely Fig. 4 (a) and 4 (b) illustrate under reflected light, when reflecting) from the outward appearance of two view directions, Fig. 4 (c) and 4 (d) illustrate in transmitted light (that is, when transmission) outward appearance from two view directions.
Under reflected light, beholder observes the micropore 42 of the first sublayer 32 via microlens 26 from view direction 54 (Fig. 3 (b)), observes the second sublayer 34 below thus.Due to the high reflectance of the second sublayer 34 and the larger surface area of the first micropore 42, from direction 54, in the coppery background front of the first sublayer 32, the first pattern (mark " G+D ") with good contrast and silver color visible brightly, as shown in Fig. 4 (b).
Never be equivalent to another view direction of the preselected view direction 54 of the first pattern, the first micropore 42 is invisible under reflected light, because in this case, beholder observes the position being positioned at the first sublayer 32 of micropore 42 outside via microlens 26.Due to the surface area that they are quite little under reflected light, the second micropore 44 is not easily seen or according to can not be perceived.Generally, from this view direction, Security element 12 presents uniform copper surface thus, as shown in Fig. 4 (a).By tilting forward and back Security element 12, under reflected light, beholder can switch between Fig. 4 (a) and the outward appearance of 4 (b).
In transmitted light, have nothing to do with view direction, due to multiple second micropore 44, recording layer 30 is translucent.Under this view direction, owing to watching micropore 44 via microlens 26, so in every case, glitter via micropore 44 from the angle that the light of rear incidence is introduced when utilizing laser beam to produce described micropore substantially.Therefore, from view direction 50 (Fig. 3 (a)), when transmission, the second pattern (alphabetic string " PL ") formed by the second micropore is visible ray under the dark background of metal recording layer 30, as shown in Fig. 4 (d).
Never be equivalent to another view direction of the preselected view direction 50 of the second pattern, the second micropore 44 is invisible in transmitted light, because in this case, beholder observes the position being positioned at the first or second sublayer of micropore 44 outside via microlens 26.Both first and second sublayers are opaque, make from this view direction, and Security element 12 presents uniform dark surface, as shown in Fig. 4 (c).By tilting forward and back Security element 12, in transmitted light, beholder can switch between Fig. 4 (c) and the outward appearance of 4 (d).
Different outward appearances under reverberation and transmitted light are for being rare and unexpected beholder, and the vision causing thus having high attention value and resolution is that attract with the obvious overall marking.
Fig. 5 illustrates that the visual appearance of Security element 12, Fig. 5 (a) illustrates outward appearance under reflected light, and Fig. 5 (b) illustrates outward appearance in transmitted light when watching from the second first type surface 24 side (rear).
Under reflected light, only can see silver color second sublayer 34 from rear, because due to their small size, the second penetrating micropore 44 can not be perceived under reflected light.Therefore, under reflected light, beholder can see uniform silver metal layer 34 from afterwards, as shown in Fig. 5 (a).
When watching in transmitted light, via multiple second micropore 44, Security element 12 looks it is translucent in polarizers of big angle scope.Compared with watching with from front, when watching from rear, cannot see the second micropore 44 via microlens 26.Definitely, the light from the first first type surface 22 incidence collected by microlens 26, and be gathered on the second micropore 44, thus obtain wide range, and wherein, the second pattern 48 formed by micropore 44 looks it is bright from rear.
First micropore 42 can not pass through recording layer 30, makes, due to opaque second sublayer 34, can not perceive the first pattern 46 in transmitted light from rear.In a word, beholder sees the bright alphabetic string " PL " under dark background thus in wide range, as shown in Fig. 5 (b).Due to when watching from rear, second pattern looks it is mirror image reversal, so the pattern of specular is preferably selected as the second pattern, or the neutral pattern of mirror image, namely sentience is not by the pattern that mirror image affects, such as geometrical pattern, building, technology or natural pattern.
In a modified example, the introducing angle of the first and/or second micropore and visual angle thus can at one or even consecutive variations on two direction in spaces in the size range of the first or second pattern 46,48.This consecutive variations can such as realize via the deflection system be applicable to for laser emission.When inclination Security element, when watching under reverberation or transmitted light, the brightness of the first or second pattern 46,48 then continuously changes.
List of parts
10 banknotes
12 Security elements
14 openings
20 support members
22,24 first type surfaces
26 microlenses
30 recording layers
32,34 first and second sublayers
40 micropores
42,44 first and second micropores
46,48 first and second patterns
50 view directions
52 laser emissions focused on
54 view directions
56 laser emissions focused on
Claims (21)
1., for an optically variable security element for cheque paper, value document and other data medium, have:
The substrate of-substantially transparent, has the first and second relative first type surfaces;
-the device that is made up of microlens, is arranged on the first first type surface of described substrate;
-laser-sensitive recording layer, is arranged on the second first type surface of described substrate, comprises the first and second stacking sublayers, and described first sublayer is arranged between described substrate and described second sublayer;
-acting on by laser emission the multiple micropores produced in described laser-sensitive recording layer, each micropore is associated with microlens, and when from certain viewing angles viewing Security element, described micropore is visible via the microlens be associated;
-described multiple micropore comprises multiple first and multiple second micropore, and described first micropore is present in described first sublayer, and can not pass through described recording layer, and described second micropore is by having the recording layer of the first sublayer and the second sublayer; And
The diameter of-described first micropore is greater than the diameter of described second micropore.
2. Security element as claimed in claim 1, is characterized in that, the diameter of described first micropore is larger than the diameter of described second micropore more than 10%, especially more than 20%, particularly preferably more than 30%.
3. Security element as claimed in claim 1 or 2, it is characterized in that, described first micropore forms the first pattern of figure, character or coding form, when watching described Security element from the first preselected view direction under reflected light, described first pattern is appreciable, described second micropore forms the second pattern of figure, character or coding form, and when watching described Security element from the second preselected view direction in transmitted light, described second pattern is appreciable.
4. the Security element as described in any one of claims 1 to 3, it is characterized in that, laser emission is utilized to introduce in described recording layer via microlens device by the first and/or second micropore from different directions, when from corresponding view direction viewing, described micropore is appreciable under reverberation or transmitted light.
5. the Security element as described in any one of Claims 1-4, is characterized in that, the first and second micropores are all circular or pattern form.
6. the Security element as described in any one of claim 1 to 5, is characterized in that, described micropore is all less than the microlens be associated.
7. the Security element as described in any one of claim 1 to 6, is characterized in that, micropore and the area ratio of the microlens be associated are less than 1.0 or be less than 0.5 or be even less than 0.2.
8. the Security element as described in any one of claim 1 to 7, is characterized in that, described second micropore more than 50%, preferably more than 75% be positioned at described first micropore.
9. the Security element as described in any one of claim 1 to 8, is characterized in that, described first and second sublayers are formed by the metal level with different colours.
10. the Security element as described in any one of claim 1 to 9, is characterized in that, described second sublayer is formed by the high reflection metal level with 90% or more high reflectance.
11. Security elements as described in any one of claim 1 to 10, it is characterized in that, the first and/or second sublayer is opaque.
12. Security elements as described in any one of claim 1 to 11, it is characterized in that, pattern image is provided with between described substrate and described recording layer, described pattern image is divided into multiple unit, be furnished with the imaging region of predetermined background patterns in each cell, when microlens device is formed in viewing graphic pattern image, rebuild the microlens grid of background patterns according to the imaging region arranged in the cells, which.
13. Security elements as claimed in claim 12, it is characterized in that, described pattern image is rendered as the relief pattern in the impression enamelled coating between described substrate and described recording layer.
14. Security elements as claimed in claim 13, it is characterized in that, described first and second sublayers are along the relief printing plate of described impression enamelled coating.
15. Security elements as described in any one of claim 1 to 14, it is characterized in that, described microlens device has semi-transparent overlays and/or exists only in the cover layer in some regions.
16. Security elements as described in any one of claim 1 to 14, it is characterized in that, described microlens device does not damage or eliminates the applied layer of microlens optical effect.
17. 1 kinds of data mediums with the Security element as described in any one of claim 1 to 16.
18. data mediums as claimed in claim 17, is characterized in that, described Security element to be arranged among the window area of described data medium or through hole or on.
19. 1 kinds of manufactures are used for the method for the optically variable security element of cheque paper, value document and other data medium, wherein:
-provide the substantially transparent substrate with the first and second relative first type surfaces, by the Plant arrangement that is made up of microlens on the first first type surface of described substrate;
-laser-sensitive recording layer is arranged on the second first type surface of described substrate, described laser-sensitive recording layer comprises the first and second stacking sublayers, and described first sublayer is arranged between described substrate and described second sublayer;
-produce multiple micropore by acting in described laser-sensitive recording layer of laser emission, each micropore is associated with microlens, and when from certain viewing angles viewing Security element, described each micropore is visible via the microlens be associated;
-described multiple micropore comprises multiple first and multiple second micropore, and producing in described first sublayer can not by described first micropore of described recording layer, and described second micropore is produced into the recording layer by having the first sublayer and the second sublayer; And
The diameter of the first micropore of-production is greater than the diameter of the second micropore.
20. methods as claimed in claim 19, is characterized in that, utilize laser emission to be introduced in recording layer by the described first and/or second micropore via microlens device from different directions.
21. methods as described in claim 19 or 20, it is characterized in that, in a first step, by second first type surface acting on described substrate of laser emission only being produced first sublayer with multiple first micropore of laser-sensitive recording layer, in the second step, be arranged in second sublayer of described laser-sensitive recording layer on described first sublayer, described second micropore is produced into the recording layer by having the first and second sublayers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012007747.5 | 2012-04-18 | ||
| DE102012007747A DE102012007747A1 (en) | 2012-04-18 | 2012-04-18 | Optically variable security element |
| PCT/EP2013/001127 WO2013156149A1 (en) | 2012-04-18 | 2013-04-16 | Optically variable security element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104245346A true CN104245346A (en) | 2014-12-24 |
| CN104245346B CN104245346B (en) | 2016-07-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380019304.6A Active CN104245346B (en) | 2012-04-18 | 2013-04-16 | Optically variable security element |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2838737B1 (en) |
| CN (1) | CN104245346B (en) |
| AU (2) | AU2013248632B2 (en) |
| DE (1) | DE102012007747A1 (en) |
| IN (1) | IN2014KN02263A (en) |
| TW (1) | TWI574211B (en) |
| WO (1) | WO2013156149A1 (en) |
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| CN105096738A (en) * | 2015-09-11 | 2015-11-25 | 武汉威杜信息科技有限公司 | Anti-counterfeiting method |
| CN106652767A (en) * | 2017-01-19 | 2017-05-10 | 福州固钛光电科技有限公司 | Anti-counterfeiting material and preparation method thereof |
| CN107921810A (en) * | 2015-05-27 | 2018-04-17 | 捷德货币技术有限责任公司 | The Security element of optically-variable |
| CN108367586A (en) * | 2015-12-10 | 2018-08-03 | 捷德货币技术有限责任公司 | Security element with lenticular image |
| CN108698432A (en) * | 2016-02-29 | 2018-10-23 | 捷德货币技术有限责任公司 | Matrixes for embossing, manufacturing method and the security element imprinted out |
| CN109863036A (en) * | 2016-11-07 | 2019-06-07 | 捷德货币技术有限责任公司 | The Security element of perspective element with optically-variable |
| CN110774795A (en) * | 2019-10-12 | 2020-02-11 | 中国人民银行印制科学技术研究所 | Security element and method for producing a security element |
| CN110789248A (en) * | 2019-10-12 | 2020-02-14 | 中国人民银行印制科学技术研究所 | Encrypted anti-counterfeiting element |
| CN111295291A (en) * | 2017-11-30 | 2020-06-16 | 富士胶片株式会社 | Security element and security system |
| CN112334320A (en) * | 2018-07-03 | 2021-02-05 | 克瑞尼股份有限公司 | Security document with attached security device exhibiting improved cut resistance |
| CN112423993A (en) * | 2018-07-19 | 2021-02-26 | 捷德货币技术有限责任公司 | Security element comprising a lenticular image |
| CN112585014A (en) * | 2018-07-19 | 2021-03-30 | 捷德货币技术有限责任公司 | Security element comprising a lenticular image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014004700A1 (en) | 2014-03-31 | 2015-10-01 | Giesecke & Devrient Gmbh | Security element with a lenticular image |
| GB2549215B (en) | 2015-06-10 | 2018-07-25 | De La Rue Int Ltd | Security devices and methods of manufacture thereof |
| DE102018127628A1 (en) * | 2018-11-06 | 2020-05-07 | Bundesdruckerei Gmbh | Security element with structurally assigned structural elements in different layers |
| FR3116761B1 (en) * | 2020-11-30 | 2024-02-09 | Idemia France | Custom image formed from a metal layer and a lenticular array |
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| CN107921810A (en) * | 2015-05-27 | 2018-04-17 | 捷德货币技术有限责任公司 | The Security element of optically-variable |
| CN105096738A (en) * | 2015-09-11 | 2015-11-25 | 武汉威杜信息科技有限公司 | Anti-counterfeiting method |
| CN108367586B (en) * | 2015-12-10 | 2020-07-17 | 捷德货币技术有限责任公司 | Security element with lenticular image |
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| CN108698432A (en) * | 2016-02-29 | 2018-10-23 | 捷德货币技术有限责任公司 | Matrixes for embossing, manufacturing method and the security element imprinted out |
| CN108698432B (en) * | 2016-02-29 | 2020-07-21 | 捷德货币技术有限责任公司 | Embossed sheet, method of manufacture and embossed security element |
| CN109863036A (en) * | 2016-11-07 | 2019-06-07 | 捷德货币技术有限责任公司 | The Security element of perspective element with optically-variable |
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| CN111295291A (en) * | 2017-11-30 | 2020-06-16 | 富士胶片株式会社 | Security element and security system |
| CN111295291B (en) * | 2017-11-30 | 2021-05-07 | 富士胶片株式会社 | Security element and security system |
| CN112334320A (en) * | 2018-07-03 | 2021-02-05 | 克瑞尼股份有限公司 | Security document with attached security device exhibiting improved cut resistance |
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| CN110789248A (en) * | 2019-10-12 | 2020-02-14 | 中国人民银行印制科学技术研究所 | Encrypted anti-counterfeiting element |
| CN110774795A (en) * | 2019-10-12 | 2020-02-11 | 中国人民银行印制科学技术研究所 | Security element and method for producing a security element |
| CN110774795B (en) * | 2019-10-12 | 2021-06-08 | 中钞印制技术研究院有限公司 | Security element and method for producing a security element |
| CN110789248B (en) * | 2019-10-12 | 2021-06-08 | 中钞印制技术研究院有限公司 | Encrypted anti-counterfeiting element |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI574211B (en) | 2017-03-11 |
| IN2014KN02263A (en) | 2015-05-01 |
| WO2013156149A1 (en) | 2013-10-24 |
| CN104245346B (en) | 2016-07-06 |
| TW201344588A (en) | 2013-11-01 |
| AU2017200729A1 (en) | 2017-02-23 |
| DE102012007747A1 (en) | 2013-10-24 |
| AU2013248632B2 (en) | 2016-11-03 |
| EP2838737A1 (en) | 2015-02-25 |
| EP2838737B1 (en) | 2017-12-13 |
| AU2013248632A1 (en) | 2014-11-06 |
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Effective date of registration: 20180321 Address after: Munich, Germany Patentee after: Jiejia German currency Technology Co., Ltd. Address before: Munich, Germany Patentee before: Giesecke & Devrient GmbH |
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