AU2001266211A1 - A security device - Google Patents
A security deviceInfo
- Publication number
- AU2001266211A1 AU2001266211A1 AU2001266211A AU2001266211A AU2001266211A1 AU 2001266211 A1 AU2001266211 A1 AU 2001266211A1 AU 2001266211 A AU2001266211 A AU 2001266211A AU 2001266211 A AU2001266211 A AU 2001266211A AU 2001266211 A1 AU2001266211 A1 AU 2001266211A1
- Authority
- AU
- Australia
- Prior art keywords
- reflection enhancing
- enhancing materials
- layer
- layers
- substrate
- 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.)
- Granted
Links
Description
A SECURITY DEVICE
The invention relates to a security device, for example for use on documents and articles of value such as bank notes and the like to reduce the risk of counterfeiting .
A common form of security device is an optically variable device, such as a hologram or diffraction grating. These devices are commonly formed as relief structures in a substrate, which is then provided with a reflective coating, for example a continuous or partial metallic layer to enhance the replay of the device. The device is then adhered to the article or document which is to be secured.
With the increased sophistication of counterfeiters, it is important to develop known devices so as to enhance their security.
Some examples of known security devices are described in US-A-5815292, US-A-5742411 , US-A-4662653 and EP-A- 0395410. In accordance with the present invention, a security device comprises a substrate formed with a surface relief defining an optically variable effect generating structure; and at least two different reflection enhancing materials on, or on the same side of the substrate with respect to, the surface relief, whereby the optically variable effect can be viewed against a background defined by the reflection enhancing materials.
We have devised a new type of security device which has a number of distinct advantages over the conventional technologies. For example, by using reflection enhancing materials with distinctly differing appearances (such as copper and aluminium) it is possible to form optically variable images, such as holograms, which will have their "rainbow" diffraction spectrum spatially modulated by the reflective hue of the underlying metallic pattern, to create a new and secure visual effect. These metallic
colours and replays are very difficult to match by dyeing or colouring material layers.
In particular, the invention leads to a security device which will, even to the untrained eye, have an aesthetic, distinct, and novel appearance when compared with a conventional device. This approach also presents a very high technological barrier for the counterfeiter to surmount and serves to distinguish the genuine hologram from a counterfeit image even in the case where the counterfeiter has managed to sufficiently reproduce the holographic effect/microstructure either optically or by mechanical replication.
Although the invention is primarily concerned with the generation of holograms, the surface relief can more generally define a diffraction grating, or even a coarser form of microstructure, for example regular triangulated features with sizes > 10 microns or randomised features which change in a visually significant way, the specular characteristics in certain areas. In some examples, the reflection enhancing materials define a common plane. Thus, the reflection enhancing materials may be laid down side by side, or one reflection enhancing material may be laid down in portions while the other reflection enhancing material is provided fully over the substrate and the one reflection enhancing material, so filling the gaps between the one reflection enhancing material .
In other examples, the reflection enhancing materials are provided in different layers, either in contact with one another or separated by one or more transparent intermediate layers. This latter approach leads to further advantages in that where these reflection enhancing layers are metals, the intermediate layer or layers can comprise a dielectric, one or both of the layers being formed as a pattern defining a rf resonant circuit, which can be remotely detected.
The device may also be verified by chemical or physical analysis.
The contacting of dissimilar metals also causes galvanic potentials to be established and these can be used to sense the presence of the layer. The magnitude of the potentials can be tailored by judicious choice of materials.
When the reflection enhancing materials are laid down in respective, different layers, the reflection enhancing material in the layer furthest from the surface relief must in general be visible through the layer containing the first reflection enhancing material (unless this further layer is covert) . This can be achieved by using a reflection enhancing material which is partially transparent, for example a high refractive index layer such as ZnS, or by providing the first reflective material in a partial manner, for example partially demetallising the layer to leave clear and opaque regions in defined patterns, e.g. dots. The reflection enhancing materials may also be laid down in patterns defining indicia, graphic elements, logos, crests, bar codes (ID and 2D) and the like which may or may not be related to or registered with the optically variable effect, such as a hologram, generated by the surface relief structure.
Typically, these reflection enhancing materials will comprise metals, such as aluminium and copper, but other metals could also be used such as tin, nichrome, silver, gold, nickel, stainless steel and also various alloys. When, for example, the copper is applied over an aluminium layer it provides protection from physical attack, copper being more durable than aluminium, and can also act as an electromagnetic shield should this property be required. Alternatively, as mentioned above, other materials such as high refractive index layers including ZnS could be used in conjunction with semi-conductors, for example silicon or
germanium, and other optically distinctive inorganic and organic films.
The reflection enhancing materials may be laid down in a variety of ways, and in preferred examples are at least in part in a predetermined pattern of for example dots or lines. For example, if the first reflection enhancing layer (e.g. aluminium) is formed with a fine array of dots/lines (too small to be individually discerned by the naked eye) then a continuous overlay of the second reflection enhancing layer (e.g. copper) will create a weighted two colour halftone or screen. By adjusting the relative screen weights of the two metals a range of colours/hues in the range aluminium-gold-bronze-copper could be formed. Of course by macro patterning the screen weight of the first layers (preferably in register with the holographic design) to vary between 100% (solid Aluminium) and 0% (solid copper) patterned graded hues could be formed.
Graded structures formed in this way will have a novel attractive appearance with the copper toning down the sometimes overpowering brightness or lustre of aluminium particularly when applied to more aesthetically traditional areas such as banknotes. The backing layer could also serve to increase the chemical durability and heat resistance of the device.
In some cases, at least one of the reflection enhancing materials will extend to an edge of the substrate. However, in the preferred approach, there is no reflective material in a border region extending along an edge of the substrate. This is particularly useful in embodiments which constitute transfer foils and the like so as to minimise problems such as edge flashing and minor mis-registration or alignment of hot stamping dies.
A further development would be to fabricate the fine screening of aluminium dots/lines such that their spacing or pitch matched that of a lenticular prism or microlens array which functions as the decoder. Therefore when the
lenticular array is placed over the bimetallic hologram, striking moire effects will be observed - these effects being orientation sensitive. This effect could be used to reveal clear silver/copper colour shifts in selected areas. This could be taken one step further and used to incorporate covert information (generically and rather loosely referred to within the industry as scambled indicia features) within the screened/metallisations. This is done by slightly changing the spacing or orientation of the dots/lines, within the localised regions that define the covert pattern (which could be alphanumeric characters, graphical features etc.). The level of change being sufficiently small that the localised covert pattern cannot be picked out by the naked eye however when the periodicity matched decoder is placed over the hologram then the covert pattern is clearly revealed. This approach has been used for some time with conventionally printed structures, for example as discussed in patent WO 97/20298 (i.e. scrambled indicia) . Its use with metallised layers is, however, novel .
The presence of a line structure of alternating materials, which have dissimilar radiation absorption characteristics, will also provide effects, which could be used to encode security indicia. Although the use of two reflection enhancing materials has been described, the invention is applicable to three or more such materials.
In an important embodiment , a further image may be provided using ink or the like between the surface relief and an adjacent one of the reflection enhancing materials. This is described in much more detail in WO-A-91/06925 incorporated herein by reference.
It will be understood that the security device can be used with a variety of documents and articles, but is particularly designed for use with documents of value, including visas, passports, licences, cheques, identity cards, plastic cards, banknotes, tickets, bonds, share
certificates, vouchers, passes, permits, electrostatic photocopies, electrostatic laser printed materials, brand authentication labels, serial numbering slips, quality control certificates, bills of lading and other shipping documentation, legal documents and tamper evident labels.
The device can also be used on/in features such as threads, tear tapes, self adhesive foils, hot stamping foils or other Brand Protection applications such as shrink sleeves . The device can be used to introduce barcodes or magnetic reading indicia amongst other machine readable type features. It could also be used with tamper evident features .
Some examples of security devices according to the invention will now be described with reference to the accompanying drawings in which :-
Figure 1 is a schematic, cross-section through one example of the device, not to scale;
Figure 2 is a schematic, cross-section through a second example;
Figure 3 is a plan view of an example based on Figure
2;
Figure 4 is a plan of an example including a covert feature; Figure 5 is a view similar to Figure 1 but illustrating a further example;
Figure 6 illustrates the appearance of a bar code; and,
Figure 7 is a plan view of a still further example. The device shown in Figure 1 comprises a lacquer or polymeric substrate 1 having a typical thickness of l-5μm, into one surface of which has been embossed an optically variable microstructure 2. The substrate 1 is supported on a carrier layer 3, for example polypropylene or PET with a typical thickness of 10-50μm and the interface between the two layers has been treated, for example, with corona
discharge or wax release, so that they can be detached in a controllable way.
The surface relief 2 is vacuum coated with an aluminium layer 4, typically 20-100nm thick, which is then partially demetallised in a designed pattern to render it partially transparent. The aluminium layer is then coated with a thicker layer of copper 5, typically 40-200nm, and finally a 0.5-20μm thick hot melt adhesive layer 6 (or a pressure sensitive adhesive for cold transfer) is provided on the copper layer 5.
In use, the device shown in Figure 1 with a hot melt adhesive 6 is applied to a document to be secured, and a hot stamping die is brought into engagement with the carrier 3, causing the adhesive 6 to be activated so as to adhere the device to the document, following which the carrier 3 is peeled away.
When the device is viewed through the lacquer layer 1, the viewer will see the hologram generated by the surface relief 2 in a conventional manner. However, that hologram will be viewed against a coloured background having a very distinctive appearance.
The example just described is in the form of a transfer structure but the invention is also applicable to hand applied labels. In that context, the carrier layer 3 would be omitted while the adhesive 6 would be a pressure sensitive adhesive.
As mentioned above, a variety of different types of device can be created.
Figure 2 illustrates an example in which the components having the same form as in Figure 1 are given the same reference numerals. The difference in this case is that a dielectric layer 7 has been inserted between the demetallised aluminium 4 and the copper layer 5. Typical dielectrics include 200nm thick zirconium dioxide or zinc sulphide. Alternatively, a semiconductor layer such as 50nm thick silicon could be used. The dielectric will be transparent so that on viewing the device, the hologram
generated by the surface relief 2 can be seen against the background defined by the aluminium layer 4 and the copper layer 5. However, the device shown in Figure 2 has the additional property that it can be detected electronically by virtue of the capacitance generated between the two metal layers 4,5. This will have a distinctive "signature" allowing the device to be identified.
In a further alternative (not shown) the copper layer 5 could be patterned to define a rf resonant circuit, again for electronic verification. Organic polymer coatings or films could be interposed between the demet aluminium 4 and the copper layer 5. These could be tinted, and/or contain fluorescent materials as more fully described in EP-A- 0497837. Figure 3 illustrates the appearance of a device constructed similar to Figure 2, the darkest areas corresponding to 100% copper and the lightest areas 100% aluminium. A wide variety of densities is used to vary the colours . Figure 4 illustrates a device using copper and aluminium and also including a covert feature 40 defining indicia "IN" and formed by using different line patterns. This could be viewed using a suitably formed line or dot screen. Figure 5 illustrates a further example which has the same constructions as shown in Figure 1 except with the addition of ink images schematically indicated at 10 which have been printed onto the surface relief 2. Typically, these ink images will be in the form of security indica and may have been provided using any known ink and as more fully described and explained in WO-A-91/06925.
An important form of image produced by the reflective layers 4,5 is a bar code. An example of a bar code is shown in Figure 6. The dark lines 12 are formed using copper while the intermediate "white" lines 14 are formed using aluminium. The feature is viewed under blue light when copper appears black and aluminium appears white.
In the embodiments described so far, the aluminium layer 4 is provided in a discontinuous manner while the copper layer 5 is generally continuous although could be discontinuous also. This means that the perimeter of the security device will be defined by metal and thus the shape of the device will be formed by the shape of the blocking/hot stamping die (in the case of hot transfer foils) or die-cutting head (in the case of hand applied labels) . However, much more intricately patterned metallic shapes or regions can be achieved by utilizing the various print based methods for achieving selective patterning of the metal layer (s) or selective removal of the metal layer (s) . In particular, the use also of a discontinuous, copper layer 5 is particularly important. In a further embodiment particularly useful from a manufacturing point of view, there will be no metal present
(copper or aluminium) within a border region of the device, for example within say 1mm of the perimeter/edge of the substrate. This facilitates effective transfer of images defined by intricately patterned regions of metal and minimises various problems as described above.
An example of this further embodiment is shown in Figure 7. A first reflection enhancing layer is visible in a region 40 while a second reflection enhancing layer is visible in a region 41. A border region 42 is transparent and defined by uncoated areas of the substrate 1 which have been transferred or applied to the final substrate 43.
In the preferred implementation of this embodiment of Figure 7, the first reflection enhancing layer in the region 40 is aluminium and the second reflection enhancing layer in the region 41 is copper or a high copper-content alloy.
Techniques for demetallising aluminium are well known in the art (see, for example, US5044707, US5142383, US5128779, US5145212), and normally involve the chemical etching of the deposits using sodium hydroxide solutions. This approach does not work well on copper-based alloys.
A variety of demetallisation processes may be used for patterning copper layers, as follows.
The copper layer may be chemically etched using acid solutions such as : Hydrochloric acid 50%v
Ferric chloride (40° Baume) 50%v
(Room temperature)
Or
Sulphuric acid (66° Baume) 5-10%v
Ferrous sulphate lOOg/litre
(40-60°C)
Other etchants may also be used such as nitric acid but generally the above systems are the most convenient to work with.
As with the techniques used for demetallising aluminium layers , the etching may be carried out by directly printing the etchant onto the surface, or preferably by printing an etchant resistant masking layer and then either immersing the web or spraying the etchants over its surface.
The areas where copper is not required may be precoated with mask composed of a solvent (e.g. water, alcohol) soluble material and then copper coated. In the latter case subsequent immersion in the appropriate solvent then causes the precoat or mask to dissolve and the copper on top of it to be dislodged. This approach has the advantage that non-corrosive materials may be used.
An alternative (but functionally inferior) approach is to print an opaque layer of (preferably white pigmented) ink onto the microstructure either prior to the first or the second reflection enhancing layer coating processes. In this case area 42 in Figure 5 is no longer a transparent area since the embossing layer has now been coated with an opaque ink.
Claims (21)
1. A security device comprising a substrate formed with a surface relief defining an optically variable effect generating structure; and at least two different reflection enhancing materials on, or on the same side of the substrate with respect to the surface relief, whereby the optically variable effect can be viewed against a background defined by the reflection enhancing materials.
2. A device according to claim 1, wherein the surface relief defines a holographic image generating microstructure .
3. A device according to claim 1 or claim 2, wherein the reflection enhancing materials define a common plane .
4. A device according to claim 1 or claim 2, wherein the reflection enhancing materials are providing in respective, different layers on the substrate.
5. A device according to claim 4, wherein one or more transparent layers are provided between the reflection enhancing layers.
6. A device according to claim 5, wherein the or each layer between the reflection enhancing material layers is a dielectric.
7. A device according to new claims 4 to 6, wherein the reflection enhancing material layer nearer the substrate is partially transparent.
8. A device according to any of the preceding claims, wherein at least two of the reflection enhancing materials are discontinuous.
9. A device according to any of the preceding claims, further comprising an ink layer between the surface relief and at least one of the reflection enhancing layers .
10. A device according to any of the preceding claims, wherein one or both of the reflection enhancing materials are provided at least in part in a predetermined pattern, such as a bar code, or indicia.
11. A device according to claim 10, wherein the predetermined pattern is defined by dots or lines having a regular periodicity.
12. A device according to claim 10 or claim 11, wherein at least one of the reflection enhancing materials is provided in a form so as to define a covert image, which is viewable with a microlens array, lenticular array, or other appropriate optical decoder matched to the periodicity.
13. A device according to any of claims 10 to 12, wherein at least one of the reflection enhancing materials is provided such that its optical density varies in one or more lateral dimensions.
14. A device according to any of the preceding claims, wherein no reflection enhancing material is provided on a border region of the substrate.
15. A device according to any of the preceding claims, wherein at least one of the reflection enhancing materials is a metal .
16. A device according to claim 15, wherein the metal is one of aluminium and copper or copper rich alloy.
17. A device according to claim 16, wherein the metal has been demetallised using an acidic solution based on hydrochloric, sulphuric or nitric acid.
18. A device according to any of claims 15 to 17, wherein the metal is provided in a pattern which defines a rf resonant circuit .
19. A device according to any of claims 15 to 18, wherein both reflection enhancing materials are metals separated by an insulating layer to define a capacitance.
20. A device according to any of the preceding claims, further comprising a printed image on the surface relief.
21. A document or article of value carrying a security device according to any of the preceding claims.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0015871.7A GB0015871D0 (en) | 2000-06-28 | 2000-06-28 | A security device |
GB0015871.7 | 2000-06-28 | ||
PCT/GB2001/002906 WO2002000446A1 (en) | 2000-06-28 | 2001-06-27 | A security device |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2001266211A1 true AU2001266211A1 (en) | 2002-03-28 |
AU2001266211B2 AU2001266211B2 (en) | 2004-03-04 |
Family
ID=9894604
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU6621101A Pending AU6621101A (en) | 2000-06-28 | 2001-06-27 | A security device |
AU2001266211A Ceased AU2001266211B2 (en) | 2000-06-28 | 2001-06-27 | A security device |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU6621101A Pending AU6621101A (en) | 2000-06-28 | 2001-06-27 | A security device |
Country Status (10)
Country | Link |
---|---|
US (1) | US6903850B2 (en) |
EP (1) | EP1294576B2 (en) |
JP (1) | JP4970695B2 (en) |
AT (1) | ATE407815T2 (en) |
AU (2) | AU6621101A (en) |
CA (1) | CA2412514A1 (en) |
CZ (1) | CZ298880B6 (en) |
DE (1) | DE60135747D1 (en) |
GB (1) | GB0015871D0 (en) |
WO (1) | WO2002000446A1 (en) |
Families Citing this family (108)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7047883B2 (en) | 2002-07-15 | 2006-05-23 | Jds Uniphase Corporation | Method and apparatus for orienting magnetic flakes |
US6987590B2 (en) * | 2003-09-18 | 2006-01-17 | Jds Uniphase Corporation | Patterned reflective optical structures |
US20070195392A1 (en) * | 1999-07-08 | 2007-08-23 | Jds Uniphase Corporation | Adhesive Chromagram And Method Of Forming Thereof |
US7667895B2 (en) * | 1999-07-08 | 2010-02-23 | Jds Uniphase Corporation | Patterned structures with optically variable effects |
EP1849621B1 (en) * | 2000-01-21 | 2014-04-16 | JDS Uniphase Corporation | Optically variable security devices |
US11768321B2 (en) | 2000-01-21 | 2023-09-26 | Viavi Solutions Inc. | Optically variable security devices |
GB0030675D0 (en) * | 2000-12-15 | 2001-01-31 | Rue De Int Ltd | Methods of creating high efficiency diffuse back-reflectors based on embossed surface relief |
US7625632B2 (en) * | 2002-07-15 | 2009-12-01 | Jds Uniphase Corporation | Alignable diffractive pigment flakes and method and apparatus for alignment and images formed therefrom |
US7063264B2 (en) | 2001-12-24 | 2006-06-20 | Digimarc Corporation | Covert variable information on identification documents and methods of making same |
JP2005512860A (en) | 2001-12-21 | 2005-05-12 | ギーゼッケ ウント デフリエント ゲーエムベーハー | Security element and method for producing the same |
DE10163381A1 (en) | 2001-12-21 | 2003-07-03 | Giesecke & Devrient Gmbh | Security paper and method and device for its production |
DE10226114A1 (en) | 2001-12-21 | 2003-07-03 | Giesecke & Devrient Gmbh | Security element for security papers and documents of value |
DE10226116A1 (en) * | 2001-12-21 | 2003-07-03 | Giesecke & Devrient Gmbh | Security element and process for its manufacture |
US7694887B2 (en) | 2001-12-24 | 2010-04-13 | L-1 Secure Credentialing, Inc. | Optically variable personalized indicia for identification documents |
US7815124B2 (en) * | 2002-04-09 | 2010-10-19 | L-1 Secure Credentialing, Inc. | Image processing techniques for printing identification cards and documents |
US7824029B2 (en) | 2002-05-10 | 2010-11-02 | L-1 Secure Credentialing, Inc. | Identification card printer-assembler for over the counter card issuing |
AT412392B (en) | 2002-05-14 | 2005-02-25 | Oebs Gmbh | VALUE DOCUMENT WITH AN OPTICAL SECURITY AREA |
JP4391063B2 (en) * | 2002-06-20 | 2009-12-24 | 大日本印刷株式会社 | Hidden pattern discrimination method by optical diffraction structure |
WO2004003668A1 (en) * | 2002-07-01 | 2004-01-08 | Toray Plastics (America), Inc. | Patterned deposition of refractive layers for high security holograms |
US11230127B2 (en) | 2002-07-15 | 2022-01-25 | Viavi Solutions Inc. | Method and apparatus for orienting magnetic flakes |
US20100208351A1 (en) * | 2002-07-15 | 2010-08-19 | Nofi Michael R | Selective and oriented assembly of platelet materials and functional additives |
US7934451B2 (en) * | 2002-07-15 | 2011-05-03 | Jds Uniphase Corporation | Apparatus for orienting magnetic flakes |
US7674501B2 (en) * | 2002-09-13 | 2010-03-09 | Jds Uniphase Corporation | Two-step method of coating an article for security printing by application of electric or magnetic field |
US9458324B2 (en) | 2002-09-13 | 2016-10-04 | Viava Solutions Inc. | Flakes with undulate borders and method of forming thereof |
US8025952B2 (en) | 2002-09-13 | 2011-09-27 | Jds Uniphase Corporation | Printed magnetic ink overt security image |
US9164575B2 (en) | 2002-09-13 | 2015-10-20 | Jds Uniphase Corporation | Provision of frames or borders around pigment flakes for covert security applications |
US7645510B2 (en) * | 2002-09-13 | 2010-01-12 | Jds Uniphase Corporation | Provision of frames or borders around opaque flakes for covert security applications |
US20070029394A1 (en) * | 2005-08-01 | 2007-02-08 | Wicker David M | Covert document system |
DE10254500B4 (en) * | 2002-11-22 | 2006-03-16 | Ovd Kinegram Ag | Optically variable element and its use |
WO2004049242A2 (en) | 2002-11-26 | 2004-06-10 | Digimarc Id Systems | Systems and methods for managing and detecting fraud in image databases used with identification documents |
EP1614064B1 (en) | 2003-04-16 | 2010-12-08 | L-1 Secure Credentialing, Inc. | Three dimensional data storage |
WO2004102195A1 (en) * | 2003-05-14 | 2004-11-25 | Index Pharmaceuticals Ab | Method for identifying tff2 regulating agents and agents identified using said method |
US7090913B2 (en) * | 2003-05-16 | 2006-08-15 | Eastman Kodak Company | Security device with specular reflective layer |
DE10328760B4 (en) * | 2003-06-25 | 2007-05-24 | Ovd Kinegram Ag | Optical security element |
DE10328759B4 (en) | 2003-06-25 | 2006-11-30 | Ovd Kinegram Ag | Optical security element and system for visualizing hidden information |
KR101110767B1 (en) | 2003-07-14 | 2012-02-24 | 플렉스 프로덕츠, 인코포레이티드 | Security products with overt and/or covert patterned layers and the method for producing the same |
US7550197B2 (en) * | 2003-08-14 | 2009-06-23 | Jds Uniphase Corporation | Non-toxic flakes for authentication of pharmaceutical articles |
GB0326576D0 (en) * | 2003-11-14 | 2003-12-17 | Printetch Ltd | Printing composition |
KR101089435B1 (en) * | 2003-11-21 | 2011-12-07 | 비쥬얼 피직스 엘엘씨 | Micro-optic security and image presentation system |
US8867134B2 (en) | 2003-11-21 | 2014-10-21 | Visual Physics, Llc | Optical system demonstrating improved resistance to optically degrading external effects |
US8773763B2 (en) | 2003-11-21 | 2014-07-08 | Visual Physics, Llc | Tamper indicating optical security device |
DE602004030484D1 (en) | 2003-12-10 | 2011-01-20 | Nippon Telegraph & Telephone | A method of producing a laminated holographic medium and a method of making a marking plate |
US7453171B2 (en) * | 2004-01-15 | 2008-11-18 | Comarco Wireless Technologies, Inc | DC power source determination circuitry for use with an adapter |
EA014334B1 (en) * | 2004-06-08 | 2010-10-29 | Смарт Хологрэмз Лимитед | Device for authentification of articles |
EP1652688A1 (en) * | 2004-10-29 | 2006-05-03 | Arjowiggins Security | Security device |
DE102005028162A1 (en) * | 2005-02-18 | 2006-12-28 | Giesecke & Devrient Gmbh | Security element for protecting valuable objects, e.g. documents, includes focusing components for enlarging views of microscopic structures as one of two authenication features |
TWI402106B (en) | 2005-04-06 | 2013-07-21 | Jds Uniphase Corp | Dynamic appearance-changing optical devices (dacod) printed in a shaped magnetic field including printable fresnel structures |
AU2006202315B2 (en) | 2005-06-17 | 2011-01-27 | Viavi Solutions Inc. | Covert security coating |
JP2009504094A (en) * | 2005-08-01 | 2009-01-29 | ドキュメント セキュリティ システムズ,インク. | Secret document system |
CA2564764C (en) | 2005-10-25 | 2014-05-13 | Jds Uniphase Corporation | Patterned optical structures with enhanced security feature |
JP2007148074A (en) * | 2005-11-29 | 2007-06-14 | Dainippon Printing Co Ltd | Light diffracting sheet |
AU2006249295A1 (en) | 2005-12-15 | 2007-07-05 | Jds Uniphase Corporation | Security device with metameric features using diffractive pigment flakes |
GB0600323D0 (en) * | 2006-01-09 | 2006-02-15 | Rue De Int Ltd | Improved optically variable magnetic stripe |
US7773337B2 (en) * | 2006-02-10 | 2010-08-10 | Seagate Technology Llc | Tamper evident tape with integrated EMI shielding |
JP4783943B2 (en) * | 2006-03-08 | 2011-09-28 | 独立行政法人 国立印刷局 | Hologram sheet and printing medium |
JP4783944B2 (en) * | 2006-03-08 | 2011-09-28 | 独立行政法人 国立印刷局 | Hologram sheet and printing medium |
CA2651986C (en) | 2006-05-12 | 2011-09-13 | Crane & Co., Inc. | A micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images |
US20070281177A1 (en) * | 2006-05-31 | 2007-12-06 | Cabot Corporation | Colored Reflective Features And Inks And Processes For Making Them |
US8790459B2 (en) * | 2006-05-31 | 2014-07-29 | Cabot Corporation | Colored reflective features and inks and processes for making them |
US20070281136A1 (en) * | 2006-05-31 | 2007-12-06 | Cabot Corporation | Ink jet printed reflective features and processes and inks for making them |
US9533523B2 (en) | 2006-05-31 | 2017-01-03 | Sicpa Holding Sa | Reflective features with co-planar elements and processes for making them |
US20070279718A1 (en) * | 2006-05-31 | 2007-12-06 | Cabot Corporation | Reflective features with co-planar elements and processes for making them |
US8070186B2 (en) * | 2006-05-31 | 2011-12-06 | Cabot Corporation | Printable reflective features formed from multiple inks and processes for making them |
TWI437059B (en) * | 2006-07-12 | 2014-05-11 | Jds Uniphase Corp | Stamping a coating of cured field aligned special effect flakes and image formed thereby |
US7812731B2 (en) * | 2006-12-22 | 2010-10-12 | Vigilan, Incorporated | Sensors and systems for detecting environmental conditions or changes |
US8502684B2 (en) | 2006-12-22 | 2013-08-06 | Geoffrey J. Bunza | Sensors and systems for detecting environmental conditions or changes |
US7790340B2 (en) * | 2007-04-20 | 2010-09-07 | Photronics, Inc. | Photomask with detector for optimizing an integrated circuit production process and method of manufacturing an integrated circuit using the same |
US7851110B2 (en) * | 2007-04-20 | 2010-12-14 | Photronics, Inc. | Secure photomask with blocking aperture |
US7943273B2 (en) * | 2007-04-20 | 2011-05-17 | Photronics, Inc. | Photomask with detector for optimizing an integrated circuit production process and method of manufacturing an integrated circuit using the same |
DE102007019837A1 (en) * | 2007-04-25 | 2008-11-13 | Hologram Industries Research Gmbh | Volume hologram, master for the production of the standard elements of the volume hologram and method for the subsequent hologram individualization when applied to personnel and value documents |
DE102007025907A1 (en) * | 2007-06-01 | 2008-12-11 | Hologram Industries Research Gmbh | Method for producing a multicolor volume hologram, document with such a hologram and volume hologram master |
GB2456500B (en) | 2007-10-23 | 2011-12-28 | Rue De Int Ltd | Improvements in security elements |
DE102007061827A1 (en) | 2007-12-20 | 2009-06-25 | Giesecke & Devrient Gmbh | Security element and method for its production |
DE102007061828A1 (en) | 2007-12-20 | 2009-06-25 | Giesecke & Devrient Gmbh | Security element and method for its production |
DE102008006533A1 (en) * | 2008-01-29 | 2009-07-30 | Giesecke & Devrient Gmbh | Security element with polarization feature |
JP2009193069A (en) | 2008-02-13 | 2009-08-27 | Jds Uniphase Corp | Medium for laser printing including optical special effect flake |
DE102008009296A1 (en) | 2008-02-15 | 2009-08-20 | Giesecke & Devrient Gmbh | Security element and method for its production |
DE102008013167A1 (en) | 2008-03-07 | 2009-09-10 | Giesecke & Devrient Gmbh | Security element and method for its production |
EP3644100A1 (en) * | 2009-03-19 | 2020-04-29 | Viavi Solutions Inc. | Patterning of a spacer layer in an interference filter |
US9275559B2 (en) * | 2009-08-24 | 2016-03-01 | Precision Dynamics Corporation | Identification medium configured for displaying visible and excitable indicia |
JP5365441B2 (en) * | 2009-09-16 | 2013-12-11 | 凸版印刷株式会社 | Judgment set, judgment sheet, latent image sheet and visualization sheet |
GB201003136D0 (en) | 2010-02-24 | 2010-04-14 | Rue De Int Ltd | Optically variable security device comprising a coloured cast cured hologram |
DE102010050031A1 (en) * | 2010-11-02 | 2012-05-03 | Ovd Kinegram Ag | Security element and method for producing a security element |
WO2012103441A1 (en) | 2011-01-28 | 2012-08-02 | Crane & Co., Inc | A laser marked device |
US10890692B2 (en) | 2011-08-19 | 2021-01-12 | Visual Physics, Llc | Optionally transferable optical system with a reduced thickness |
CN103814308A (en) * | 2011-09-23 | 2014-05-21 | 3M创新有限公司 | Retroreflective articles including security mark |
EP3415340B1 (en) | 2012-01-12 | 2022-10-19 | Viavi Solutions Inc. | Article with curved patterns formed of aligned pigment flakes |
AU2012100573B4 (en) | 2012-05-10 | 2013-03-28 | Innovia Security Pty Ltd | An optical security device |
JP6053932B2 (en) | 2012-08-17 | 2016-12-27 | ビジュアル フィジクス エルエルシー | The process of transferring the microstructure to the final substrate |
GB201301788D0 (en) | 2013-02-01 | 2013-03-20 | Rue De Int Ltd | Security devices and methods of manufacture thereof |
GB201301790D0 (en) | 2013-02-01 | 2013-03-20 | Rue De Int Ltd | Security devices and methods of manufacture thereof |
JP6410793B2 (en) | 2013-03-15 | 2018-10-24 | ビジュアル フィジクス エルエルシー | Optical security device |
WO2014169323A1 (en) * | 2013-04-19 | 2014-10-23 | Innovia Security Pty Ltd | Diffractive optical element security device for providing validation of a security document |
US9873281B2 (en) | 2013-06-13 | 2018-01-23 | Visual Physics, Llc | Single layer image projection film |
US10434812B2 (en) | 2014-03-27 | 2019-10-08 | Visual Physics, Llc | Optical device that produces flicker-like optical effects |
US10766292B2 (en) | 2014-03-27 | 2020-09-08 | Crane & Co., Inc. | Optical device that provides flicker-like optical effects |
FR3020309B1 (en) | 2014-04-29 | 2016-05-27 | Hologram Ind | OPTICAL SECURITY COMPONENT WITH REFLECTIVE EFFECT, MANUFACTURE OF SUCH A COMPONENT AND SECURE DOCUMENT EQUIPPED WITH SUCH A COMPONENT |
US9489604B2 (en) * | 2014-06-03 | 2016-11-08 | IE-9 Technology Corp. | Optically variable data storage device |
US11126902B2 (en) | 2014-06-03 | 2021-09-21 | IE-9 Technology Corp. | Optically variable data storage device |
EA026699B1 (en) * | 2014-07-07 | 2017-05-31 | Открытое Акционерное Общество "Научно-Производственное Объединение "Криптен" | Optical protection device |
BR112017000914B1 (en) | 2014-07-17 | 2022-03-03 | Visual Physics, Llc. | Improved polymeric sheet material for use in producing polymeric security documents such as banknotes |
MX2017003423A (en) | 2014-09-16 | 2017-11-22 | Crane Security Tech Inc | Secure lens layer. |
DE102015100280A1 (en) * | 2015-01-09 | 2016-07-14 | Ovd Kinegram Ag | Method for the production of security elements and security elements |
MX2017010258A (en) | 2015-02-11 | 2018-03-23 | Crane & Co Inc | Method for the surface application of a security device to a substrate. |
GB2549780B (en) * | 2016-04-29 | 2019-11-27 | De La Rue Int Ltd | Methods of manufacturing lens transfer structures |
GB2550122B (en) * | 2016-05-06 | 2020-12-23 | De La Rue Int Ltd | Security device and method |
US11590791B2 (en) | 2017-02-10 | 2023-02-28 | Crane & Co., Inc. | Machine-readable optical security device |
CN109152259A (en) * | 2017-06-27 | 2019-01-04 | 昇印光电(昆山)股份有限公司 | A kind of optical thin film, mold and electronic equipment cover board |
Family Cites Families (43)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3580657A (en) | 1968-05-14 | 1971-05-25 | Xerox Corp | Blazed surface hologram |
CH505394A (en) | 1970-08-05 | 1971-03-31 | Balzers Patent Beteilig Ag | Filters for lenses for generating optical images with diffraction phenomena |
US3708217A (en) | 1971-04-28 | 1973-01-02 | Sperry Rand Corp | Holographic non-isotropic diffusing screen |
US5171363A (en) | 1979-12-28 | 1992-12-15 | Flex Products, Inc. | Optically variable printing ink |
CH661368A5 (en) | 1984-01-03 | 1987-07-15 | Landis & Gyr Ag | Diffraction optical safety element. |
DE3527412A1 (en) † | 1985-07-31 | 1987-02-12 | Kurz Leonhard Fa | MULTI-LAYER FILM, ESPECIALLY HOT-IMPRESSION FILM AND METHOD FOR THE PRODUCTION THEREOF |
GB8619922D0 (en) † | 1986-08-15 | 1986-09-24 | Hewitt B | Composite holographic elements |
JPS6374674U (en) * | 1986-11-05 | 1988-05-18 | ||
GB2208016A (en) | 1987-08-13 | 1989-02-15 | Chubb Electronics Ltd | Data carriers bearing holographic optical elements |
GB8726883D0 (en) | 1987-11-17 | 1987-12-23 | Chubb Electronics Ltd | Data carriers |
US5128779A (en) | 1988-02-12 | 1992-07-07 | American Banknote Holographics, Inc. | Non-continuous holograms, methods of making them and articles incorporating them |
US5145212A (en) | 1988-02-12 | 1992-09-08 | American Banknote Holographics, Inc. | Non-continuous holograms, methods of making them and articles incorporating them |
GB8814232D0 (en) | 1988-06-15 | 1988-07-20 | Chubb Electronics Ltd | Data carriers |
GB8814233D0 (en) | 1988-06-15 | 1988-07-20 | Chubb Electronics Ltd | Data carriers |
US5278590A (en) * | 1989-04-26 | 1994-01-11 | Flex Products, Inc. | Transparent optically variable device |
GB8912750D0 (en) † | 1989-06-02 | 1989-07-19 | Portals Ltd | Security paper |
DE3932505C2 (en) † | 1989-09-28 | 2001-03-15 | Gao Ges Automation Org | Data carrier with an optically variable element |
GB8924111D0 (en) | 1989-10-26 | 1989-12-13 | Amblehurst Ltd | Optical device |
US5044707A (en) | 1990-01-25 | 1991-09-03 | American Bank Note Holographics, Inc. | Holograms with discontinuous metallization including alpha-numeric shapes |
US5142383A (en) | 1990-01-25 | 1992-08-25 | American Banknote Holographics, Inc. | Holograms with discontinuous metallization including alpha-numeric shapes |
US5332488A (en) * | 1991-08-27 | 1994-07-26 | Hitachi Magnetics Corporation | Surface treatment for iron-based permanent magnet including rare-earth element |
JP2561186B2 (en) † | 1991-09-11 | 1996-12-04 | 日本発条株式会社 | Object identification structure |
US6010721A (en) * | 1991-09-24 | 2000-01-04 | The Miriam Hospital | Glycyrrhetinic-acid-like factor |
JP3318006B2 (en) * | 1992-08-26 | 2002-08-26 | 大日本印刷株式会社 | Hybrid hologram |
JP3315731B2 (en) * | 1992-08-26 | 2002-08-19 | 大日本印刷株式会社 | Hybrid molded hologram and its manufacturing method |
JP3363485B2 (en) * | 1992-08-26 | 2003-01-08 | 大日本印刷株式会社 | Hybrid hologram |
GB9309673D0 (en) † | 1993-05-11 | 1993-06-23 | De La Rue Holographics Ltd | Security device |
JP3691848B2 (en) | 1993-11-01 | 2005-09-07 | モトローラ・インコーポレイテッド | Liquid crystal display consisting of reflective holographic optical elements |
US5877895A (en) | 1995-03-20 | 1999-03-02 | Catalina Coatings, Inc. | Multicolor interference coating |
US5757521A (en) † | 1995-05-11 | 1998-05-26 | Advanced Deposition Technologies, Inc. | Pattern metallized optical varying security devices |
US5659408A (en) | 1995-05-24 | 1997-08-19 | Polaroid Corporation | Reflective image-providing display viewed with holographically diffused ambient light |
US5708717A (en) | 1995-11-29 | 1998-01-13 | Alasia; Alfred | Digital anti-counterfeiting software method and apparatus |
US5815292A (en) * | 1996-02-21 | 1998-09-29 | Advanced Deposition Technologies, Inc. | Low cost diffraction images for high security application |
US5742411A (en) * | 1996-04-23 | 1998-04-21 | Advanced Deposition Technologies, Inc. | Security hologram with covert messaging |
US5812229A (en) | 1996-05-01 | 1998-09-22 | Motorola, Inc. | Holographic reflective color liquid crystal display device |
DE29622700U1 (en) † | 1996-05-20 | 1997-06-05 | Kurz Leonhard Fa | Laminating film |
US6104812A (en) * | 1998-01-12 | 2000-08-15 | Juratrade, Limited | Anti-counterfeiting method and apparatus using digital screening |
EP0953937A1 (en) † | 1998-04-30 | 1999-11-03 | Securency Pty. Ltd. | Security element to prevent counterfeiting of value documents |
GB9810399D0 (en) | 1998-05-14 | 1998-07-15 | Rue De Int Ltd | Holographic security device |
GB2338680B (en) † | 1998-06-25 | 2000-05-17 | Rue De Int Ltd | Improvementd in security documents and subtrates therefor |
GB2340281A (en) | 1998-08-04 | 2000-02-16 | Sharp Kk | A reflective liquid crystal display device |
US20010003035A1 (en) † | 1998-09-10 | 2001-06-07 | Robert G. Ozarski | Diffraction grating and fabrication technique for same |
US6761959B1 (en) † | 1999-07-08 | 2004-07-13 | Flex Products, Inc. | Diffractive surfaces with color shifting backgrounds |
-
2000
- 2000-06-28 GB GBGB0015871.7A patent/GB0015871D0/en not_active Ceased
-
2001
- 2001-06-27 DE DE60135747T patent/DE60135747D1/en not_active Expired - Lifetime
- 2001-06-27 CZ CZ20024259A patent/CZ298880B6/en not_active IP Right Cessation
- 2001-06-27 JP JP2002505209A patent/JP4970695B2/en not_active Expired - Lifetime
- 2001-06-27 US US10/297,391 patent/US6903850B2/en not_active Expired - Lifetime
- 2001-06-27 AU AU6621101A patent/AU6621101A/en active Pending
- 2001-06-27 EP EP01943674.0A patent/EP1294576B2/en not_active Expired - Lifetime
- 2001-06-27 AT AT01943674T patent/ATE407815T2/en active
- 2001-06-27 WO PCT/GB2001/002906 patent/WO2002000446A1/en active IP Right Grant
- 2001-06-27 CA CA002412514A patent/CA2412514A1/en not_active Abandoned
- 2001-06-27 AU AU2001266211A patent/AU2001266211B2/en not_active Ceased
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2001266211B2 (en) | A security device | |
AU2001266211A1 (en) | A security device | |
EP1198358B1 (en) | Security device | |
CA2414746C (en) | Security paper and document of value produced therefrom | |
EP2441593B1 (en) | Security element with achromatic features | |
EP2951029B1 (en) | Security devices and methods of manufacture thereof | |
RU2313456C2 (en) | Protective element with color kipp effect and magnetic properties, object with such a protective element, and method for manufacturing such protective element and such object | |
EP3445592B1 (en) | Security devices and methods of manufacture thereof | |
JP2005512859A (en) | Security elements for security papers and certificates | |
EP1549505A1 (en) | Embossed optically variable devices | |
EA015048B1 (en) | Security devices for security substrates | |
RU2341379C2 (en) | Images protected against forgery and shaped with metal, and also protection devices and documents protected with their help | |
JP5565251B2 (en) | Personal authentication medium |