EP4408672A1 - Darstellungselement mit einem oberhalb und unterhalb des substrats schwebenden bild - Google Patents
Darstellungselement mit einem oberhalb und unterhalb des substrats schwebenden bildInfo
- Publication number
- EP4408672A1 EP4408672A1 EP22785921.2A EP22785921A EP4408672A1 EP 4408672 A1 EP4408672 A1 EP 4408672A1 EP 22785921 A EP22785921 A EP 22785921A EP 4408672 A1 EP4408672 A1 EP 4408672A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical elements
- display element
- grid
- element according
- 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.)
- Pending
Links
Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/50—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a three-dimensional [3D] volume, e.g. voxels
- G02B30/56—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a three-dimensional [3D] volume, e.g. voxels by projecting aerial or floating images
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
Definitions
- the invention relates to a display element having a substrate with an upper side and an underside, with a large number of optical elements being arranged in a surface area of the upper side.
- a display element according to ga things is known, for example, from WO 2012/048847 A1.
- This display element produces a floating effect in which, when the display element is illuminated, a light spot image is generated from a large number of light spots which appear to be floating above or below the surface area and which are arranged in the form of predetermined information or a motif.
- the optical elements are formed by refractive and/or reflective optical elements, with each light spot of the light spot image being assigned at least one refractive and/or reflective optical element which, when the display element is illuminated, contributes to generating the light spot assigned to it.
- a particular disadvantage here is that the floating effect is only weakly pronounced, since the large number of light spots appear to be floating only at a small distance above or below the surface area, and only has a low contrast between the light spots floating above or below the surface area.
- the invention is therefore based on the object of developing a generic display element in such a way that the disadvantages of the prior art are eliminated. This object is solved by the features of the independent claim. Developments of the invention are the subject matter of the dependent claims.
- some of the optical elements are arranged in a first grid and another part of the optical elements are arranged in a second grid, with the first grid adjoining the second grid.
- the optical elements of the first raster consist of a first type of optical elements and the optical elements of the second raster consist of a second type of optical elements, the first type of optical elements being different from the second type of optical elements.
- the optical elements of the first grid have a first focal plane forming a first grid of dots, for example a foreground subject
- the optical elements of the second grid have a second focal plane forming a second grid of dots, for example a background subject.
- the first light point grid has a different floating height or at a different distance from the upper side of the substrate than the second light point grid.
- the foreground motif particularly preferably appears to float above the display element and the background motif to lie below the display element.
- the rotated version can also be selected here, in which the foreground motif appears to float below the display element and the background motif appears to lie above the display element.
- a third or further grid of a third or further different type of optical elements with third or further motifs at different flying heights can also be provided, which adjoins the first and/or second grid.
- the optical elements of the first grid have a first distance from the underside of the substrate and the optical elements of the second grid have a second distance from the underside of the substrate, the first distance being different from the second distance is.
- the first distance preferably differs from the second distance by up to about 200 ⁇ m, particularly preferably up to about 100 ⁇ m and very particularly preferably by about 75 ⁇ m.
- the optical elements of the first grid are therefore in the same direction as the optical elements of the second grid offset from the underside of the substrate.
- the floating effect is intensified since the distance between the floating height of the first light grid and the floating height of the second light grid is increased and the foreground motif and background motif are therefore further apart in the z-direction.
- the first type of optical elements is inverted or mirrored by approximately 170° to 190° and preferably by 180° about the transverse axis with respect to the second type of optical elements.
- the second type of optical elements consists of the same optical elements as the first type of optical elements, for example Fresnel lenses or Fresnel mirrors, both types being only almost or completely inverted or mirrored by about 180° around the transverse axis.
- the fact that the first type of optical elements is different from the second type of optical elements also means that the first and the second type of optical elements are the same type of optical elements and these are inverted to one another.
- the first type of optical elements can, for example, have a convex structure made of optical elements and the second type of optical elements can have a concave structure of the same be optical elements.
- the transverse axis is understood to mean an axis which runs in the direction of the surface of the substrate, in contrast to the vertical axis which is perpendicular to the surface of the substrate.
- the lateral dimension of the first grid in the x and/or y direction is at least three times, preferably at least five times and particularly preferably at least ten times as large as the grid width of the light point grid of the first grid or the distance between adjacent ones Points of light or focal points of the optical elements of the first grid.
- the optical elements comprise curved mirrors, in particular concave mirrors or convex mirrors.
- the curved mirrors are preferably spherical, elliptical, rotationally symmetrical aspherical, non-rotationally symmetrical aspherical or channel-shaped, with the channels running in a straight line or curvilinearly in the latter case.
- the curved mirrors are particularly preferably formed at least partially by Fresnel mirrors.
- the design of the convex mirror as a Fresnel mirror has the particular advantage that the embossing heights and embossing depths can be reduced compared to simple convex mirrors.
- micro-mirror arrangements can also be used, for example, as described in DE 10 2009056 934 A1, in which individual facets can be arranged regularly or irregularly.
- the optical elements comprise lenses, in particular spherical, elliptical, rotationally symmetrical aspherical, non-rotationally symmetrical aspherical or cylindrical lenses.
- the lenses are particularly preferably at least partially formed by Fresnel lenses.
- the optical elements of the first grid are formed by curved mirrors and the optical elements of the second grid are formed by lenses.
- the optical elements of the first grid are formed by concave Fresnel mirrors and the optical elements of the second grid are formed by convex Fresnel mirrors and/or convex Fresnel lenses.
- the optical elements essentially have no optically diffractive effect.
- the optical elements have an extent of up to approximately 5 mm, preferably up to approximately 2 mm and particularly preferably of approximately 1 mm, in the lateral direction or in the xy direction relative to the upper side of the substrate.
- the optical elements have an extent of up to approximately 200 gm, preferably up to approximately 100 gm and particularly preferably of approximately 50 gm, in the vertical direction or in the z-direction relative to the upper side of the substrate.
- the optical elements according to the invention When the optical elements according to the invention are used on or in a substrate made of at least one plastic film or in a silver paint, lacquer layer or metallization, the optical elements can also have significantly smaller extents in the lateral and/or vertical direction and the difference between the first distance and the second distance can be significantly smaller.
- the respective values for the extent or the distances can be less than or equal to 1 ⁇ m.
- they must each be so large that the optical elements essentially have no diffractive effect and that there is a significantly increased contrast between the light spots hovering above or below the surface area compared to the prior art.
- the points of light may not have a "real" floating height at all, but perform an orthoparalactic movement, for example when tilting north-south in the x-direction from east to west in the y-direction a "rotating mirror" known from DE 102009 056934 A1 or a Fresnel lens with "saddle-shaped phase function” known from WO 2011/110185 A1.
- a "rotating mirror” known from DE 102009 056934 A1
- a Fresnel lens with "saddle-shaped phase function” known from WO 2011/110185 A1.
- a contour line is arranged between the first and the second grid, which is also curved, for example, or can show a corresponding curved effect on the basis of Fresnel structures.
- the production of the display element according to the invention takes place solely on the basis of film or, for example, also as blind embossing (e.g. steel engraving) in a silver color, a lacquer layer or metallization.
- the optical elements according to the invention can be introduced directly into the top side of the substrate or into the silver paint, lacquer layer or metallization which is applied to the top side of the substrate.
- the invention allows objects to be displayed with much clearer outlines than is possible with the comparatively "coarse-pixel” light spot images from WO 2012/048847 A1. It was surprisingly found that the essentially stationary transition between the two areas has the 3D effect or The subject of the invention thus allows an optically appealing representation of sharp-edged objects, which appear more attractive and have a higher resolution than the light spot images from the prior art without losing the depth effect: In the prior art, "entire" Fresnel lenses (or at least always the same Fresnel lens sections) and the resolution was limited by their size.
- the substrate particularly preferably consists of at least one plastic film or of paper made of cotton fibers, such as is used for banknotes, or of other natural fibers or of synthetic fibers or a mixture of natural and synthetic fibers. Furthermore, the substrate preferably consists of a combination of at least two different substrates arranged one above the other and connected to one another, a so-called hybrid.
- the substrate consists, for example, of a combination of plastic film-paper-plastic film, ie a substrate made of paper is covered on each of its two sides by a plastic film, or of a combination of paper-plastic film-paper, ie a substrate made of a plastic film is covered on each of its covered with paper on both sides.
- Documents of value for which a display element according to the invention can be used are, in particular, banknotes, stocks, bonds, certificates, vouchers, checks, high-quality admission tickets, but also other papers at risk of forgery, such as passports and other identification documents, and cards, such as credit or debit cards, whose card body has at least one layer of security paper, and also product security elements such as labels, seals, packaging, folding boxes, package inserts and the like.
- the simplified term value document includes all previously mentioned materials, documents and product security measures.
- top or bottom of the substrate are relative terms with respect to the viewer of the display element, where a viewer views the display element from the top surface of the substrate.
- these terms can also be referred to as “the one” and “the opposite” side and form the majority of the total surface area of the substrate.
- Explicitly not included with These terms are the side surfaces of a substrate, which are extremely small given a substrate thickness of only about one millimeter for card bodies or only fractions of a millimeter for banknotes and usually cannot be provided with a display element.
- the display element shows a motif, which is a pattern-shaped and visually perceptible display within the meaning of this invention. This can, for example, form an alphanumeric string of digits and/or letters, a graphic image, an image, text or other characters.
- the motif particularly preferably consists of positive and/or negative motifs. In the case of a positive motif, a motif element itself is applied to the substrate, whereas in the case of a negative motif the area surrounding the motif element is applied to the substrate.
- a positive motif is, for example, a dark-colored letter applied to the light-colored substrate.
- a negative motif is, for example, a dark-colored area applied to the light-colored substrate, which has an unprinted area in the form of a letter within the area.
- FIG. 1 shows a display element according to the invention in plan view
- Fig. 2 shows a sectional view of Fig. 1 along the section A-A in side view.
- FIG. 1 shows a plan view of a display element formed by a first array or first grid of a plurality of convex mirrors 2, each having the shape of a concave Fresnel mirror.
- the first grid is designed as an image motif 3 in the form of a square, which is illustrated in FIG. 1 by hatching for better representation.
- the area surrounding the image motif is formed by a second array or second grid of a large number of convex mirrors 1 which are inverted relative to the convex mirrors 2 or mirrored by 180° about the transverse axis, each of which is in the form of a convex Fresnel mirror or a convex Fresnel lens.
- the lateral dimension of the first grid is four times as large in the x-direction and in the y-direction as the grid width of the light point grid of the first grid or the distance between adjacent light points or focal points of the optical elements of the first grid or, to put it another way, as the diameter a single convex mirror 2.
- FIG. 2 shows a side view of a sectional view from FIG. 1 along the sectional area AA.
- the convex mirror 2 are on the top of the substrate and have a focal point 2.1.
- the convex mirror 1 have a focal point 1.1.
- the convex mirrors 1 are offset downwards in relation to the convex mirrors 2 in the direction of the underside of the substrate, the distance of the convex mirrors 2 from the underside of the substrate being approximately 75 gm greater than the distance of the convex mirrors 1 from the underside of the substrate.
- the selection of the concave and convex mirrors and the shifting of the convex mirror 1 in the direction of the underside of the substrate (or z-direction) allows a maximum distance between the focal points 1.1 and 2.1 to one another.
- the light spots 5 of the concave and convex mirror surfaces move synchronously in opposite directions in the direction of the arrows, so that a viewer 4 observes a particularly pronounced dynamic beat effect.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021004910.1A DE102021004910A1 (de) | 2021-09-29 | 2021-09-29 | Darstellungselement mit einem oberhalb und unterhalb des Substrats schwebenden Bild |
| PCT/EP2022/025440 WO2023051948A1 (de) | 2021-09-29 | 2022-09-22 | Darstellungselement mit einem oberhalb und unterhalb des substrats schwebenden bild |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4408672A1 true EP4408672A1 (de) | 2024-08-07 |
Family
ID=83598368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22785921.2A Pending EP4408672A1 (de) | 2021-09-29 | 2022-09-22 | Darstellungselement mit einem oberhalb und unterhalb des substrats schwebenden bild |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240385465A1 (de) |
| EP (1) | EP4408672A1 (de) |
| CN (1) | CN118019650A (de) |
| DE (1) | DE102021004910A1 (de) |
| WO (1) | WO2023051948A1 (de) |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359454A (en) * | 1992-08-18 | 1994-10-25 | Applied Physics Research, L.P. | Apparatus for providing autostereoscopic and dynamic images |
| BR0007172A (pt) * | 1999-09-30 | 2001-09-04 | Koninkl Philips Electronics Nv | Dispositivo lenticular, e, conjunto de dispositivos lenticulares |
| US6288842B1 (en) * | 2000-02-22 | 2001-09-11 | 3M Innovative Properties | Sheeting with composite image that floats |
| KR101225311B1 (ko) * | 2003-11-21 | 2013-01-22 | 비쥬얼 피직스 엘엘씨 | 마이크로-광학 보안 및 화상 연출 시스템 |
| US7261417B2 (en) * | 2004-02-13 | 2007-08-28 | Angstrom, Inc. | Three-dimensional integral imaging and display system using variable focal length lens |
| DE102005028162A1 (de) * | 2005-02-18 | 2006-12-28 | Giesecke & Devrient Gmbh | Sicherheitselement und Verfahren zu seiner Herstellung |
| BRPI0713906B1 (pt) * | 2006-06-28 | 2018-06-05 | Visual Physics, Llc. | Sistema micro-óptico de segurança e apresentação de imagem |
| DE102008009296A1 (de) * | 2008-02-15 | 2009-08-20 | Giesecke & Devrient Gmbh | Sicherheitselement und Verfahren zu seiner Herstellung |
| DE102008046511A1 (de) * | 2008-09-10 | 2010-03-11 | Giesecke & Devrient Gmbh | Darstellungsanordnung |
| FR2943800A1 (fr) | 2009-03-30 | 2010-10-01 | Arjowiggins Security | Element de securite comportant des structures reflechissantes elementaires. |
| DE102009022612A1 (de) | 2009-05-26 | 2010-12-02 | Giesecke & Devrient Gmbh | Sicherheitselement, Sicherheitssystem und Herstellungsverfahren dafür |
| DE102009056934A1 (de) | 2009-12-04 | 2011-06-09 | Giesecke & Devrient Gmbh | Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes |
| DE102010047250A1 (de) * | 2009-12-04 | 2011-06-09 | Giesecke & Devrient Gmbh | Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes |
| GB201003398D0 (en) * | 2010-03-01 | 2010-04-14 | Rue De Int Ltd | Optical device |
| EA017394B1 (ru) | 2010-03-09 | 2012-12-28 | Ооо "Центр Компьютерной Голографии" | Микрооптическая система формирования визуальных изображений |
| DE102010025775A1 (de) * | 2010-07-01 | 2012-01-05 | Giesecke & Devrient Gmbh | Sicherheitselement sowie Wertdokument mit einem solchen Sicherheitselement |
| DE102010048262A1 (de) * | 2010-10-12 | 2012-04-12 | Giesecke & Devrient Gmbh | Darstellungselement |
| FR2979734B1 (fr) * | 2011-09-02 | 2014-05-23 | Arjowiggins Security | Structure de securite comportant une structure optique reflechissante, et procede associe. |
| FR3019496A1 (fr) * | 2014-04-07 | 2015-10-09 | Hologram Ind | Composant optique de securite a effet reflectif, fabrication d'un tel composant et document securise equipe d'un tel composant |
| GB201413473D0 (en) * | 2014-07-30 | 2014-09-10 | Rue De Int Ltd | Security device and method of manufacture thereof |
| AU2016100402B4 (en) * | 2016-04-13 | 2017-08-17 | Ccl Secure Pty Ltd | Micro-optic device with integrated focusing element and image element structure |
| AU2016100401B4 (en) * | 2016-04-13 | 2017-02-09 | Ccl Secure Pty Ltd | Micro-optic device with double sided optical effect |
| DE102016013242A1 (de) * | 2016-11-07 | 2018-05-09 | Giesecke+Devrient Currency Technology Gmbh | Sicherheitselement mit optisch variablem Durchsichtselement |
| DE102017006421A1 (de) * | 2017-07-07 | 2019-01-10 | Giesecke+Devrient Currency Technology Gmbh | Optisch variable Sicherheitsanordnung |
-
2021
- 2021-09-29 DE DE102021004910.1A patent/DE102021004910A1/de not_active Withdrawn
-
2022
- 2022-09-22 CN CN202280065418.3A patent/CN118019650A/zh active Pending
- 2022-09-22 EP EP22785921.2A patent/EP4408672A1/de active Pending
- 2022-09-22 US US18/696,101 patent/US20240385465A1/en active Pending
- 2022-09-22 WO PCT/EP2022/025440 patent/WO2023051948A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021004910A1 (de) | 2023-03-30 |
| US20240385465A1 (en) | 2024-11-21 |
| WO2023051948A1 (de) | 2023-04-06 |
| CN118019650A (zh) | 2024-05-10 |
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