CN104245346B - Optically variable security element - Google Patents
Optically variable security element Download PDFInfo
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- CN104245346B CN104245346B CN201380019304.6A CN201380019304A CN104245346B CN 104245346 B CN104245346 B CN 104245346B CN 201380019304 A CN201380019304 A CN 201380019304A CN 104245346 B CN104245346 B CN 104245346B
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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
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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
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/43—Marking by removal of material
- B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
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- Finance (AREA)
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- General Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Credit Cards Or The Like (AREA)
Abstract
The present invention relates to a kind of optically variable security element (12) for cheque paper, value document and other data medium, have: the carrier (20) of substantially transparent, there are first and second first type surfaces (22,24) of location toward each other；The device of microlens (26), is positioned on first first type surface (22) of described carrier；Laser-sensitive recording layer (30), it is arranged on second first type surface (24) of described carrier, including first and second sublayers (32 being arranged in above another, 34), wherein, described first sublayer (32) is arranged between described carrier (20) and described second sublayer (34)；By laser emission act in described laser-sensitive recording layer produce multiple micropores (40), each micropore (40) distributes to microlens (26), and when watching Security element from certain viewing angles, described micropore is visible via the microlens (26) being associated, wherein, the plurality of micropore includes multiple first and multiple second micropore (42, 44), wherein said first micropore (42) is present in described first sublayer (32), and do not pass through described recording layer (30), described second micropore (44) is through having the first sublayer and the second sublayer (32, 34) recording layer (30), and wherein, the diameter of described first micropore (42) is more than the diameter of described second micropore (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 manufacturing 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) are generally of Security element; described Security element allows to confirm the verity of data medium, and functions simultaneously as the safeguard procedures to unauthorized copying.
The Security element with the effect depending on visual angle has effect in protection verity, because they even can not be replicated by state-of-the-art photocopier.At this, Security element has optically variable element, and with different view, beholder is presented different image impression by optically variable element, and shows such as other color or brightness impression and/or other pictorial pattern according to visual angle.
Such as, the ID card of the such as credit card or personal identity card individualizes by laser engraving for a long time.In individualized by laser engraving, to expect that the form suitably guided laser bundle of labelling can irreversibly change the optical properties of base material.This laser labelling makes can be combined personalization and the Security element of data medium, and is more freely bonded in dimensional printed chart picture than conventional personalized (than method for numbering serial as is known).
Document EP0219012A1 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 so that when tilting identity card, presents different information segment.
Summary of the invention
Based on this, the purpose of the present invention is to provide the Security element of a kind of the above-mentioned type with attracting visual appearance and high anti-counterfeiting.
This purpose is realized by the feature of independent claims.The development example of the present invention is the theme of dependent claims.
According to the present invention, general Security element includes:
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, and including the first and second stacking sublayers, the first sublayer is arranged between substrate and the second sublayer；
-by laser emission act in laser-sensitive recording layer produce multiple micropores, each micropore is associated with microlens, and when from certain viewing angles viewing Security element time, described micropore is visible via the microlens being associated；
-the plurality of micropore includes multiple first and multiple second micropore, and the first micropore is present in the first sublayer, and will not pass through recording layer, and the second micropore is by having the first sublayer and the recording layer of the second sublayer；And
The diameter of the-the first micropore is more than the diameter of the second micropore.
The lens being smaller in size than discernable by eye rate are called microlens.Microlens preferably develops into sphere or aspheric, and such as in banknote, it is advantageous to has between 5 μm and 10 μm, be preferably between 10 μm and 50 μm, particularly preferably diameter between 15 μm and 20 μm.Applying for card, microlens also can be bigger, and has such as diameter between 100 μm and 300 μm.In the design, microlens also can develop into cylindrical lens.
The diameter of the first micropore preferably bigger 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 results in the notable contrast differences of reflecting effect fruit or transmission light effect, as explained in.
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.For notable contrast differences, for instance, bigger 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 respectively less than the microlens being associated.At this, micropore is smaller than 1.0 or less than 0.5 with the area ratio of the microlens being associated, 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, for instance 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 appropriate particularly with the first bigger micropore.
Although the first micropore is at least different from the second micropore in their size with their shape (if desired), but the first micropore itself is advantageously respectively provided with identical shape and size, and the second micropore is also such.
First micropore advantageously generates the first pattern of figure, character or coding form, when watching Security element from the first preselected view direction under reflected light, first pattern is appreciable, second micropore forms the second pattern of figure, character or coding form, when watching Security element from the second preselected view direction in transmitted light, the second pattern is appreciable.First and second patterns are usually different, but can also be identical.It addition, the first and second view directions preferably difference, but can also be identical.
In expedients, the first and second micropores are arranged independently of one another.In the expedients that other is similar, being fully located at least partially in the first micropore of the second micropore.Such as, the second micropore more than 50%, more than 75% or all second micropores can be fully located in the first micropore.So, it is possible to producing " pattern in pattern ", wherein, transmission light pattern manifests in reflected light pattern.Such as, Security element may be included in decorations chapter that is visible under reflection light and that formed by the first micropore, therein, when switch to watch in transmitted light time, the second micropore the mark formed is visible.In this case, it is advantageous to 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 somewhat seeing afterwards, under reflection light or transmission light, micropore can be perceived from the corresponding view direction introducing micropore.At this, as it has been described above, the first micropore can all perceive from the first view direction, the second micropore can all perceive from the second different view directions.
But, also can introduce the first micropore group from a direction, introduce another the first micropore group from other direction.So, the first micropore the first pattern displaying formed goes out tilted image or alternate images, and their subimage is formed by the first different micropore groups.It addition, the embodiment with more than two incoming direction or direction change continuously is possible.Or or extraly, in the same manner, it is possible to introduce the second micropore from two or more different directions.
Can be associated on meaning from the different visible pattern parts of view direction or subimage, for instance as handspring book (flip-book), and illustrate the image sequence advanced before beholder when Security element tilts.If introducing angle change and visual angle consecutive variations thus, then pattern presents when Security element tilts transparency and brightness thus change continuously.
First and second sublayers of recording layer are advantageously formed by metal level, for instance the layer constructed by the alloy (such as made of Al-Cu alloy) of aluminum, 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 aluminum 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, for instance formed by the aluminum of gas deposition or silver layer.
Advantageously, the first and/or second sublayer is opaque, and when its absorbance is under visible light less than 1%, 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 not including other layer.
But, it is also contemplated that other layers one or more are arranged in the embodiment between the first and second sublayers of recording layer.Especially, may be present between the first and second sublayers through one or more layers of laser, for instance the dielectric layer being made up of SiO2 (silicon dioxide).This additional layer can use such as producing particular color and/or gamut effect, and/or serves as bonding enhancement layer.In addition, described sublayer similarly can be constituted by the multiple individual courses including neutral line equally.
Illustrated by as discussed, the diameter of the micropore in identical recordings layer or surface area difference allow the two kinds of discrete appearance encoding Security element under lower for reflection light viewing to transmission light to be encoded.Summarizing 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 because their small size.Accordingly, because the high reflectance of the second sublayer, the first micropore the first pattern formed is under reflected light by perception well, and the second pattern remains hidden.
In transmitted light, sufficient light also extends through the second smaller micropore, with can the second pattern of being formed by described second micropore of perception, and the first pattern being made up of the first micropore being present in the first sublayer remains hidden due to the opacity of the second sublayer.
It is present in the first micropore in the first sublayer preferably without extending in the second sublayer.But, if it practice, direct one of the first and second sublayers are positioned at above another stacking, then owing to producing reason, it is harmless that hole somewhat extends in the second sublayer (that is, less than the 1/10 of layer thickness or be even less than 1/20).Important is only that the rest layers thickness of the second sublayer has sufficiently high reflectance and sufficiently high opacity.
In the Advantageous developments example of the present invention, Security element includes micro-optic graphic display unit simultaneously, especially More's amplifying device, More's type micro-optic amplifying device or modulus amplifying device.The ultimate principle of this micro-optic graphic display unit is illustrated at document WO2009/000528A1, and the disclosure of the document is as being incorporated by this specification.In this case, Security element preferably has the pattern image being divided into multiple unit between substrate and recording layer, being provided with the imaging region of predetermined background patterns in each cell, microlens device forms the microlens grid rebuilding background patterns when viewing graphic pattern image according to the imaging region arranged in the cells.
Pattern image is advantageously rendered as and is arranged between substrate and recording layer and imprints the relief pattern in enamelled coating (embossinglacquerlayer).At this, especially can be set to, the first and second sublayers, along the relief printing plate of impressing enamelled coating, namely have essentially identical relief pattern.
In a modified example of the present invention, microlens device can have translucent cover layer and/or exist only in the cover layer in some regions.But, currently, it is preferable that microlens device does not damage or eliminates the applied layer of microlens optical effect.
Present invention additionally comprises data medium, be especially value document, 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 especially be arranged among the window area of data medium or through hole or on.
Present invention additionally comprises a kind of manufacture method for the optically variable security element of cheque paper, value document and other data medium, wherein:
-the substantially transparent substrate with the first and second relative first type surfaces is provided, the device being 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, described laser-sensitive recording layer includes the first and second stacking sublayers, and described first sublayer is arranged between described substrate and described second sublayer；
-producing multiple micropore by acting in described laser-sensitive recording layer of laser emission, each micropore is associated with microlens, and when watching Security element from certain viewing angles, described micropore is visible via the microlens being associated；
-the plurality of micropore includes multiple first and multiple second micropore, produces described first micropore that will not pass through described recording layer in described first sublayer, and described second micropore produces into by having the first sublayer and the recording layer of the second sublayer；And
The diameter of the first micropore of-production is more 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 the first step, first sublayer with multiple first micropore only producing laser-sensitive recording layer on the second first type surface of described substrate is acted on by laser emission, 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 includes:
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；
-printing layer, is especially ink layer, arranges on the recording layer；
-by laser emission act in described laser-sensitive recording layer produce multiple micropores, each micropore is associated with microlens, and when watching Security element from certain viewing angles, described micropore is visible via the microlens being associated, and each micropore is less than the microlens being associated；
-at least one gap area of being produced in the recording layer by the effect of laser emission, the size being sized larger than described microlens of at least one gap area described；
-at least one gap area described forms the first pattern of figure, character or coding form, and when viewing Security element under reflecting light and transmission light, described first pattern is perceived as the outward appearance with printing layer；And
-described microlens forms the second pattern of figure, character or coding form, only when watching Security element from preselected view direction in transmitted light, 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 auxiliary device, can be seen via microlens by naked eyes typically without when amplifying.Its minimum dimension is typically larger than 0.5mm, is generally several millimeters.Printing layer material can but be not necessarily required to penetrate in micropore and/or gap area.Microlens device is preferably without damaging or eliminating the applied layer of microlens optical effect.Recording layer can be such as thick for 50nm aluminium lamination, has printing layer, for instance the red enamelled coating of solvent-borne type of impressing.Security element can be applied to the data medium in transmitted light with specific transmission, such as bank-note paper.In expedients, Security element 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 and the advantage of the present invention are described, in accompanying drawing, it does not have be drawn to scale to improve their definition.
In accompanying drawing:
Fig. 1 is the schematic diagram of the banknote of creative optically variable security element, and optically variable security element is arranged on the through hole of banknote；
Fig. 2 schematically shows the cross section of the Rotating fields of the Security element according to the present invention；
(a) and (b) of Fig. 3 illustrates two intermediate steps of the Security element manufacturing Fig. 2；
Fig. 4 is when watching in the past, the visual appearance of the Security element of Fig. 2, a () and (b) illustrates that (c) and (d) illustrates in transmitted light from the outward appearance of two view directions under reflected 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) under reflected light and in transmitted light (b).
Detailed description of the invention
Currently use the example of the Security element for banknote so that the present invention to be described.For this, Fig. 1 illustrates the schematic diagram of the banknote 10 of creative optically variable security element 12, and optically variable security element is arranged 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 reflection light and transmission 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 attensity and high resolution.
Fig. 2 schematically shows the cross section of the Rotating fields of the Security element 12 according to the present invention, it is only necessary to a part of Rotating fields illustrates shown principle of work and power.
Security element 12 includes the substrate 20 of substantially transparent, and it is generally formed by transparent plastic paillon foil, for instance polyethylene terephthalate (PET) paillon foil of about 20 μ m-thick.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 is formed on the surface of substrate foil and have preselected symmetric two dimension Bravias lattice.Such as, the Bravias lattice of microlens 26 can have hexagon grid symmetry, or also has low-symmetry, such as the 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 perceives thus without by naked eyes.The thickness of substrate 20 and the curvature coordination with one another of microlens 26 so that the focal length of microlens 26 is approximately equivalent to the thickness of substrate 20.
Being provided with the laser-sensitive recording layer 30 being made up of two stacking sublayers on the second first type surface 24 of substrate 20, the first sublayer 32 is 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 reflectance of 90% or bigger.For this, in example shown embodiment, the first sublayer 32 is formed by 100nm thick copper layer, and the second sublayer 34 is formed by 50nm thickness aluminium lamination, and succeedingly vapour deposition is on the substrate 20 for they.
Additionally, multiple circular micropores 40 are introduced in recording layer 30 by the effect of laser emission.At this, a part (hereinafter referred to as the first micropore 42) for micropore exists only in the first sublayer 32, and will not pass through recording layer 30.Another part (hereinafter referred to as the second micropore 44) of micropore is by having the recording layer 30 of the first and second sublayers 32,34.
Multiple first micropores 42 collectively form the first pattern 46, in the exemplary embodiment for mark " G+D ", and can perception the first pattern (Fig. 4 (b)) when watching Security element from the first preselected view direction under reflected light.Multiple second micropores 44 collectively form the second pattern 48, are alphabetical to " PL " in the exemplary embodiment, can perception the 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 thus (6 μm/4 μm)=1.5 times of the diameter of the second micropore 44.Correspondingly, the surface area of the first micropore 42 is that (6 μm/4 μm) 2=2.25 times of the surface area of the second micropore 44 are big.So, on the one hand, be accomplished that, it is only capable of seeing the first pattern 46 under reflected light, and it cannot be seen that the second pattern 48.On the other hand, by the high reflectance of the first big micropore 42 and the second sublayer 34, it is determined that the bright outward appearance of the first pattern.
The observability that first and second patterns only select view direction from particular pre-selected is to produce the direct result of micropore via microlens 26.Referring to Fig. 3, in order to manufacture Security element 12, first preferably the layers of copper 32 that 100nm is thick is applied to the second first type surface of substrate 20 in vacuum vapor deposition process, to this, applies the thick aluminium lamination 34 of 50nm.In these layer thickness situations, cover layer 32 and aluminium lamination 34 are opaque.And, aluminium lamination 34 presents the extra high reflectance more 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 is focused on recording layer 30 by microlens 26, as shown in the reference number 52 of Fig. 3 (a).At this, laser energy or laser power are chosen to the first sublayer 32 and the second sublayer 34 both of which is ablated so that produce have 2 to 4 μ m diameter and by circle second micropore 44 of recording layer.At this, laser beam travels across the region, surface of the second pattern 48 so that whole second micropore 44 forms the second pattern 48.
Then, then clash into the substrate of coating with laser emission along the view direction 54 of expectation after a while of the first pattern from microlens 26 side.Laser emission is focused 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, it is chosen to substantially only ablation the first sublayer 32, without ablation the second sublayer 34.In order to produce the larger surface area of the first micropore 42, for instance, the direction of illumination of laser can about expectation view direction 54 to become round shape to tilt by a small margin.So, circle first micropore with the diameter of 3 to 8 μm is produced.Additionally, laser beam travels across the surface of the first pattern 46 so that whole first micropore 42 forms the first pattern 46.
Via the method, it may be achieved, each micropore 42,44 is associated with microlens 26, via microlens 26, generates micropore 42,44 when laser light strikes, via microlens, due to the reversibility of light path, can see that micropore when watching Security element subsequently.
In an alternative method modified example, not shown at this, in order to manufacture Security element 12, first preferably the layers of copper 32 that 100nm is thick 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:YVO4Or the radiation of fibre laser) clash into the substrate being coated with layers of copper 32.Microlens 26 focuses on laser emission in 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 larger surface area of the first micropore 42, for instance, the direction of illumination of laser can about expectation view direction 54 to become round shape to tilt by a small margin.At this, laser beam travels across the region, surface of the first pattern 46 so that whole first micropore 42 forms the first pattern 46.
Afterwards, aluminium lamination 34 thick for 50nm is applied to (preferably gas deposition to) layers of copper 32.Then, clash into the substrate of coating with laser emission along the view direction 50 of expectation after a while of the second pattern 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 so that generates circle the second micropore 44 (having the diameter of 2 to 4 μm) by whole recording layer 30.At this, laser beam travels across the surface of the second pattern 48 so that whole second micropore 44 forms 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 so generated, (namely Fig. 4 (a) and 4 (b) illustrate under reflected light, when reflection) 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 from view direction 54 (Fig. 3 (b)) via microlens 26, thus observes the second following sublayer 34.Relatively larger surface area due to the high reflectance of the second sublayer 34 and the first micropore 42, from direction 54, in the coppery background front of the first sublayer 32, the first pattern (mark " G+D ") is visible brightly with good contrast and silver color, as shown in Fig. 4 (b).
Never being 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 outside micropore 42 via microlens 26.Due to the surface area that they are fairly small 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 thus presents uniform copper surface, 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, unrelated with view direction, due to multiple second micropores 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 substantially introduced when utilizing laser beam to produce described micropore.Therefore, from view direction 50 (Fig. 3 (a)), when transmission, the second micropore the second pattern (letter string " PL ") formed is visible ray under the dark background of metal recording layer 30, as shown in Fig. 4 (d).
Never being 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 outside micropore 44 via microlens 26.Both first and second sublayers are opaque so that 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 reflection light and transmission light are rare and unexpected for beholder, thus cause that the vision with high attensity and resolution attracts and 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).
The second penetrating micropore 44 under reflected light, it is only capable of from rear seeing silver color the second sublayer 34, because due to their small size, can not be perceived under reflected light.Therefore, under reflected light, beholder can be seen that uniform silver metal layer 34 from rear, as shown in Fig. 5 (a).
When watching in transmitted light, via multiple second micropores 44, Security element 12 appears to be 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 is gathered on the second micropore 44, thus obtaining wide range, wherein, micropore 44 the second pattern 48 formed appears to be bright from rear.
First micropore 42 will not pass through recording layer 30 so that due to opaque second sublayer 34, can not perceive the first pattern 46 in transmitted light from rear.In a word, beholder thus sees the bright letter string " PL " under dark background in wide range, as shown in Fig. 5 (b).Due to when watching from rear, second pattern appears to be mirror image reversal, so the pattern of specular is preferably chosen as the second pattern, or mirror image neutrality pattern, namely the pattern that sentience is not affected by mirror image, such as geometrical pattern, building, technology or natural pattern.
In a modified example, the first and/or second micropore introduce angle and visual angle thus can in the size range of the first or second pattern 46,48 on one or even two direction in space consecutive variations.This consecutive variations can such as realize via the deflection system being suitable for for laser emission.When tilting Security element, under reflecting light or transmission light during viewing, the brightness of the first or second pattern 46,48 then changes continuously.
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 (29)
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, and including the first and second stacking sublayers, described first sublayer is arranged between described substrate and described second sublayer；
-by laser emission act in described laser-sensitive recording layer produce multiple micropores, each micropore is associated with microlens, and when from certain viewing angles viewing Security element time, described micropore is visible via the microlens being associated；
-the plurality of micropore includes multiple first and multiple second micropore, and described first micropore is present in described first sublayer, and will not pass through described recording layer, and described second micropore is by having the first sublayer and the recording layer of the second sublayer；And
The diameter of-described first micropore is more than the diameter of described second micropore.
2. Security element as claimed in claim 1, it is characterised in that microlens develops into sphere or aspheric.
3. Security element as claimed in claim 1 or 2, it is characterised in that the diameter of described first micropore is than the diameter big more than 10% of described second micropore.
4. Security element as claimed in claim 3, it is characterised in that the diameter of described first micropore is than the diameter big more than 20% of described second micropore.
5. Security element as claimed in claim 4, it is characterised in that the diameter of described first micropore is than the diameter big more than 30% of described second micropore.
6. Security element as claimed in claim 1 or 2, it is characterised in that the diameter of the first micropore is not more than 4 times of the second micro-pore diameter.
7. Security element as claimed in claim 6, it is characterised in that the diameter of the first micropore is not more than 3 times of the second micro-pore diameter.
8. 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.
9. Security element as claimed in claim 1 or 2, it is characterized in that, utilizing laser emission to introduce in described recording layer via microlens device by the first and/or second micropore from different directions, when watching from corresponding view direction, described micropore is appreciable under reflection light or transmission light.
10. Security element as claimed in claim 1 or 2, it is characterised in that the first and second micropores are all circular or pattern form.
11. Security element as claimed in claim 1 or 2, it is characterised in that described micropore is respectively less than the microlens being associated.
12. Security element as claimed in claim 1 or 2, it is characterised in that the area ratio of micropore and the microlens being associated is less than 1.0 or less than 0.5 or is even less than 0.2.
13. Security element as claimed in claim 1 or 2, it is characterised in that described second micropore be positioned at described first micropore more than 50%.
14. Security element as claimed in claim 13, it is characterised in that described second micropore be positioned at described first micropore more than 75%.
15. Security element as claimed in claim 1 or 2, it is characterised in that the first and second sublayers of recording layer are formed by metal level.
16. Security element as claimed in claim 15, it is characterised in that the layer that the first and second sublayers of recording layer are constructed by the alloy of aluminum, copper, silver, gold, chromium, nickel, tungsten, palladium or these metals is formed.
17. Security element as claimed in claim 1 or 2, it is characterised in that described first and second sublayers are formed by the metal level with different colours.
18. Security element as claimed in claim 1 or 2, it is characterised in that described second sublayer is formed by the high reflection metal level with 90% or more high reflectance.
19. Security element as claimed in claim 1 or 2, it is characterised in that the first and/or second sublayer is opaque.
20. Security element as claimed in claim 1 or 2, it is characterized in that, it is provided with pattern image between described substrate and described recording layer, described pattern image is divided into multiple unit, being provided with the imaging region of predetermined background patterns in each cell, microlens device forms the microlens grid rebuilding background patterns when viewing graphic pattern image according to the imaging region arranged in the cells.
21. Security element as claimed in claim 20, it is characterised in that described pattern image is rendered as the relief pattern in the impressing enamelled coating between described substrate and described recording layer.
22. Security element as claimed in claim 21, it is characterised in that described first and second sublayers are along the relief printing plate of described impressing enamelled coating.
23. Security element as claimed in claim 1 or 2, it is characterised in that described microlens device has semi-transparent overlays and/or exists only in the cover layer in some regions.
24. Security element as claimed in claim 1 or 2, it is characterised in that described microlens device does not damage or eliminates the applied layer of microlens optical effect.
25. the data medium of the Security element having as described in any one of claim 1 to 24.
26. data medium as claimed in claim 25, it is characterised in that described Security element be arranged among the window area of described data medium or through hole or on.
27. the method manufacturing the optically variable security element being used for cheque paper, value document and other data medium, wherein:
-the substantially transparent substrate with the first and second relative first type surfaces is provided, the device being 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, described laser-sensitive recording layer includes the first and second stacking sublayers, and described first sublayer is arranged between described substrate and described second sublayer；
-producing multiple micropore by acting in described laser-sensitive recording layer of laser emission, each micropore is associated with microlens, and when watching Security element from certain viewing angles, described each micropore is visible via the microlens being associated；
-the plurality of micropore includes multiple first and multiple second micropore, produces described first micropore that will not pass through described recording layer in described first sublayer, and described second micropore produces into by having the first sublayer and the recording layer of the second sublayer；And
The diameter of the first micropore of-production is more than the diameter of the second micropore.
28. method as claimed in claim 27, it is characterised 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.
29. the method as described in claim 27 or 28, it is characterized in that, in the first step, first sublayer with multiple first micropore only producing laser-sensitive recording layer on the second first type surface of described substrate is acted on by laser emission, in the second step, being arranged in described first sublayer by the second sublayer of described laser-sensitive recording layer, described second micropore produces 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 CN104245346A (en) | 2014-12-24 |
| CN104245346B true CN104245346B (en) | 2016-07-06 |
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| 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) |
Families Citing this family (16)
| 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 |
| DE102015006793A1 (en) * | 2015-05-27 | 2016-12-01 | Giesecke & Devrient Gmbh | Optically variable security element |
| GB2539390B (en) * | 2015-06-10 | 2018-07-25 | De La Rue Int Ltd | Security devices and methods of manufacture thereof |
| CN105096738A (en) * | 2015-09-11 | 2015-11-25 | 武汉威杜信息科技有限公司 | Anti-counterfeiting method |
| DE102015015991A1 (en) | 2015-12-10 | 2017-06-14 | Giesecke & Devrient Gmbh | Security element with lenticular image |
| DE102016002451A1 (en) * | 2016-02-29 | 2017-08-31 | Giesecke & Devrient Gmbh | Embossing plate, manufacturing process and embossed security element |
| DE102016013242A1 (en) * | 2016-11-07 | 2018-05-09 | Giesecke+Devrient Currency Technology Gmbh | Safety element with optically variable translucent element |
| CN106652767B (en) * | 2017-01-19 | 2019-03-19 | 福州固钛光电科技有限公司 | A kind of anti-fake material and preparation method thereof |
| WO2019107065A1 (en) * | 2017-11-30 | 2019-06-06 | 富士フイルム株式会社 | Security element and security system |
| JP2021529688A (en) * | 2018-07-03 | 2021-11-04 | クレイン アンド カンパニー、 インコーポレイテッド | Security documents with security devices that show improved harvesting resistance |
| DE102018005705A1 (en) * | 2018-07-19 | 2020-01-23 | Giesecke+Devrient Currency Technology Gmbh | Security element with lenticular image |
| DE102018005697A1 (en) * | 2018-07-19 | 2020-01-23 | Giesecke+Devrient Currency Technology Gmbh | Security element with lenticular image |
| DE102018127628A1 (en) * | 2018-11-06 | 2020-05-07 | Bundesdruckerei Gmbh | Security element with structurally assigned structural elements in different layers |
| 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 |
| 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 |
| 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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| CN1224507A (en) * | 1996-01-17 | 1999-07-28 | 布鲁斯·A·罗森塔尔 | Lenticular optical system |
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| EP0219012B1 (en) | 1985-10-15 | 1993-01-20 | GAO Gesellschaft für Automation und Organisation mbH | Data carrier with an optical authenticity feature, and method of making and checking the data carrier |
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| DE102006005000B4 (en) * | 2006-02-01 | 2016-05-04 | Ovd Kinegram Ag | Multi-layer body with microlens arrangement |
| DE102007029203A1 (en) | 2007-06-25 | 2009-01-08 | Giesecke & Devrient Gmbh | security element |
| DE102009060191A1 (en) * | 2009-12-23 | 2011-06-30 | Giesecke & Devrient GmbH, 81677 | Method for producing a micro-optical representation arrangement |
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- 2012-04-18 DE DE102012007747A patent/DE102012007747A1/en not_active Withdrawn
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2013
- 2013-04-16 IN IN2263KON2014 patent/IN2014KN02263A/en unknown
- 2013-04-16 CN CN201380019304.6A patent/CN104245346B/en active Active
- 2013-04-16 EP EP13717173.2A patent/EP2838737B1/en active Active
- 2013-04-16 TW TW102113532A patent/TWI574211B/en not_active IP Right Cessation
- 2013-04-16 AU AU2013248632A patent/AU2013248632B2/en active Active
- 2013-04-16 WO PCT/EP2013/001127 patent/WO2013156149A1/en active Application Filing
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2017
- 2017-02-03 AU AU2017200729A patent/AU2017200729A1/en not_active Abandoned
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| CN1224507A (en) * | 1996-01-17 | 1999-07-28 | 布鲁斯·A·罗森塔尔 | Lenticular optical system |
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| CN101678698A (en) * | 2007-03-12 | 2010-03-24 | 金雅拓公司 | Secure identification document and method for producing it |
| CN102177029A (en) * | 2008-08-08 | 2011-09-07 | 德国捷德有限公司 | Safety element having incident and transmitted light information |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2838737A1 (en) | 2015-02-25 |
| AU2013248632A1 (en) | 2014-11-06 |
| DE102012007747A1 (en) | 2013-10-24 |
| TW201344588A (en) | 2013-11-01 |
| AU2017200729A1 (en) | 2017-02-23 |
| IN2014KN02263A (en) | 2015-05-01 |
| TWI574211B (en) | 2017-03-11 |
| CN104245346A (en) | 2014-12-24 |
| AU2013248632B2 (en) | 2016-11-03 |
| EP2838737B1 (en) | 2017-12-13 |
| WO2013156149A1 (en) | 2013-10-24 |
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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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