CN104011742A - Security device - Google Patents

Security device Download PDF

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Publication number
CN104011742A
CN104011742A CN201280063039.7A CN201280063039A CN104011742A CN 104011742 A CN104011742 A CN 104011742A CN 201280063039 A CN201280063039 A CN 201280063039A CN 104011742 A CN104011742 A CN 104011742A
Authority
CN
China
Prior art keywords
image
substrate
array
image component
visible
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
Application number
CN201280063039.7A
Other languages
Chinese (zh)
Other versions
CN104011742B (en
Inventor
加里·费尔利斯·鲍尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CCL Security Pty Ltd
Original Assignee
Yi Nuoweiya Safe Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR1159424A external-priority patent/FR2966269A1/en
Application filed by Yi Nuoweiya Safe Corp filed Critical Yi Nuoweiya Safe Corp
Publication of CN104011742A publication Critical patent/CN104011742A/en
Application granted granted Critical
Publication of CN104011742B publication Critical patent/CN104011742B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1847—Manufacturing methods
    • G02B5/1852—Manufacturing methods using mechanical means, e.g. ruling with diamond tool, moulding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G02B5/188—Plurality of such optical elements formed in or on a supporting substrate
    • G02B5/1885—Arranged as a periodic array
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Facsimile Heads (AREA)
  • Printing Methods (AREA)

Abstract

An optical security device (10; 700) is provided which includes a transparent or translucent substrate (15; 705), at least one first array of repeating elements (20; 720) in or on a first side (16; 706) of the substrate (15; 705), at least one second array of repeating elements (30; 730) on a second side of the substrate. The second array of repeating elements (20; 720) is substantially in register with the first array of elements (30; 730), whereby a first image (130; 725) is visible when viewing the device from the first side, and a second image (200; 735) is visible when viewing the device from the second side. The brightness or colour levels of repeating image elements (30; 720, 730) on at least one side of the substrate may be modulated region-wise to produce a greyscale or coloured image. In one embodiment, the first array of repeating elements in or on a first side of the substrate is an array of focussing elements (20), and the second array of repeating elements in or on the second side of the substrate is an array of image elements (30) having substantially identical shape to each other, such that, when viewing the device from the first side, a magnified image including at least one magnified version of the image element shape is visible, and when viewing the device from the second side, the greyscale or coloured image is visible. In another embodiment, the repeating elements of both the first and second arrays are partially or fully opaque image elements (720; 730) which respectively form the first and second images (725; 735).

Description

Safety feature
Technical field
The present invention relates to a kind of optical safety device for secure file and manufacture method thereof.
Definition
Secure file
As used in this article, term secure file comprises all types of securities and token, and documentation of identity, it includes but not limited to following: such as currency item, credit card, check, passport, the I.D. of currency and coins, securities and share prove, pilot's certificate, contract, travel document, badge and admission ticket, births & deaths and marriage certificate and academic record list such as air ticket and train ticket.
Transparent window and half window
As used in this article, term window refers in secure file and Comparatively speaking transparent or semi-transparent area pellucida, the opaque region substantially of application of printed art thereon.Window can be completely transparent to can make optical transmission substantially unaffected, or window can be can make light transmission but can not make by this window region clearly see the partially transparent of object or part translucent.
By save at least one opaque layer in the region that forms window region, window region can be formed in polymkeric substance secure file, and this polymkeric substance secure file has at least one layer of transparent polymeric material and is applied at least one or more opaque layer of one side of transparent polymer substrate.If opaque layer is applied to the two sides of transparent substrates, can form complete transparent window by the opaque layer of saving on the two sides of transparent substrates in window region.
Partially transparent or translucent areas (hereinafter referred to as " half window ") can not be completely transparent to make " half window " by the opaque layer of only saving in the one side of the secure file in window region, but can make can to make some light pass the in the situation that of cannot clearly observing object by half window, and be formed in the polymkeric substance secure file that two sides all has opaque layer.
As an alternative, be inserted into the embolus of the transparent plastic material in otch or adopt the recess in paper or transparent plastic substrate to form transparency window mouth region or translucent half-window mouth region by employing, thereby can form substrate by the opaque material substantially such as paper or compo.
Opaque layer
One or more opaque layer can be applied to transparent substrates to increase the opacity of secure file.Opaque layer is L t<L 0layer, wherein, L 0the amount that incides the light on file, and L tit is the amount that sees through the light of file.Opaque layer can comprise any or multiple opaque coating in various opaque coatings.For example, opaque coating can comprise the pigment in bonding agent or the carrier that is dispersed in hot activation crosslinked polymeric materials, such as titania.As an alternative, the substrate of transparent plastic material can be clipped in paper or its partially or substantially between the opaque layer of opaque material, can print subsequently or adopt other modes to apply mark for this opaque layer.
Focus size or Focus width H
As the land used that makes in the text, term focus size (or Focus width) refers to light that scioptics the reflect size distributing for how much with the point of certain viewing angles and object plane intersection, is often referred to effective diameter or effective width.Can calculate according to theory, light track simulation or infer focus size according to actual measurement.
Focal distance f
In this manual, while use when the lenticule about in lens arra, focal length means from lenticular summit to distributing the distance of position of given focus (referring to T.Miyashita by location maximum power density when collimated telescope during from the lens side incident of array, 46, the 5391 pages of " Standardization for microlenses and microlens arrays " (2007) Japanese Journal of Applied Physics).
Detect thickness t
Detect thickness is that the summit of the lenslet the one side of transparent or translucent material is to the surperficial distance being provided with thereon on the opposite face of trnaslucent materials of the image component substantially overlapping with object plane.
Lens frequency and spacing
The lens frequency of lens arra is crossing the quantity to the lenslet in set a distance on lens arra surface.Spacing is the distance from the summit of a lenslet to the summit of adjacent lenslet.In uniform lens arra, spacing and lens frequency have inverse relation.
Lens width W
The width of the lenslet in microlens array is the distance from an edge of lenslet to the opposite edges of lenslet.Having in the lens arra of semisphere or semicircle cylindricality lenslet, width equals the diameter of lenslet.
Radius of curvature R
The radius-of-curvature of lenslet is the distance from the point of the lip-deep normal to lens surface of lens and line (lens axis) intersection on the vertical summit that extends through lenslet.
Sag (sag) height s
The sag height of lenslet or surface sag s are the distances of the point from summit to the axis intersecting with the line of shortest length that extends through axis from the edge-perpendicular of lenslet.
Refractive index n
The refractive index n of medium is the ratio of the light velocity in the light velocity and the medium in vacuum.According to Si Nieer (Snell) law, the refractive index n of lens is determined the amount that the light ray of arrival lens surface is refracted:
n 1*Sin(α)＝n*Sin(θ)
Wherein, α is the angle between incident ray and the normal at incidence point place of lens surface place, and θ is the angle between refracted ray and the normal at incidence point place, and n 1that the refractive index of air is (as approximate n 1can get 1).
Conic constant P
Conic constant P be the amount of quafric curve portion is described and for geometrical optics with nominated ball (P=1), oval (0<P<1, or P>1), para-curve (P=0) and hyperbolic curve (P<0) lens.The conic constant that some lists of references represent with alphabetical K.Pass between K and P is K=P-1.
Blade space angle
The blade space angle of lens is the whole visual angles that formed by lens.
Abbe number
Estimating of dispersion (refractive index being with the variation of wavelength) that Abbe number transparent or translucent material is material.Selection for the suitable Abbe number of lens can contribute to minimize aberration.
Background technology
The present invention seeks to provide a kind of safety feature, and this safety feature has attracting outward appearance, can manufacture economically, and the anti-counterfeiting of enhancing is also provided simultaneously.
In order to produce optically variable effects, be known that the lenticular array adopting in the respective array that is arranged to focus on identical microimage.Can obtain surprising especially effect by the slight misregistration of lenticule and microimage, thereby produce a series of More (moir é) striped.Moire fringe shows as the form of the microimage of amplified version.Be called as this effect of " More's amplification " by the people such as Hutley (Pure and Applied Optics3,133-142 page, 1994) and Amidror (" The Theory of the Moire Phenomenon ", Kluwer, Dordrecht, 2000) be previously described.
Transparent or trnaslucent materials makes this substrate be suitable as the carrier for the above-mentioned type device as the purposes of the substrate for safety feature or secure file.For example, microimage can be applied to the one side of substrate, and lenticule be applied to the opposite face of substrate, thereby make it serve as optical interval part, for example, at US5, described in 712,731.
Produce and show that the safety feature of More's enlarge-effect or the alternative mode of secure file are the independent screens that microlens array form is set.This screen can be element independently, maybe can be combined into a part for safety feature or secure file and aim at microimage, by file being folded to other positions that are located on file.
Summary of the invention
According to a first aspect of the invention, provide a kind of optical safety device, having comprised:
Transparent or translucent substrate,
At least one first repeat element array in the first surface of substrate or on first surface,
At least one second repeat element array on second of substrate,
Wherein, at least one second repeat element array is aimed at at least one first element arrays substantially,
And wherein, when from first surface finder, the first image is visible, and when from second finder, the second image is visible.
Preferably, the repeat element at least one face of substrate is by area modulation according to the brightness of the corresponding region of input gray level or colored image or color grade.
In one embodiment, the repeat element at least one face of substrate can be amplitude modulation(PAM).In another embodiment, the rugosity of the repeat element at least one face of substrate or surface area can be modulated.
In the first image and the second image can be one of at least optically-variable.In one embodiment, the first image can be that Optical Variable Imaging and the second image can be the immutable images of optics.
In another embodiment, both immutable images of optics of the first image and the second image.
Optical safety device can be included in two or more repeat element arrays at least one face of substrate or at least one face.
Repeat element at least one face of substrate can be impression element.In one embodiment, the impression element at least one face of substrate forms multiimage element.In this case, each impression image component has the degree of depth, and the degree of depth is preferably by area modulation.
Repeat element at least one face of substrate can be printing images element.In another embodiment, the repeat element on the two sides of substrate is printing images element.
Repeat element at least one face of substrate can be diffraction or the sub-wavelength structure that forms image component.Diffraction or sub-wavelength structure can be surrounded by non-diffraction background.
In another embodiment, repeat element at least one face of substrate is to be included the non-diffraction image component that the background area of diffraction or sub-wavelength grate structure surrounds, and the background area of image on this face of substrate shows coloured optical variable effect.
In a preferred embodiment, at least one first repeat element array in the first surface of substrate or on first surface is focusing element array, and at least one second repeat element array in second of substrate or on second is the image component array with substantially mutually the same shape, wherein, the image component of at least one the second array is by area modulation according to the brightness of the corresponding region of input gray level or colored image or color grade, make when from first surface finder, the enlarged image that comprises the image component shape of at least one amplified version is visible, and when from second finder, gray scale or colored image are visible.
According to second aspect, the invention provides a kind of optical safety device, comprising:
Transparent or translucent substrate,
Focusing element array in the first surface of substrate or on first surface, and
There is substantially mutually the same shape and be disposed at least one the multiimage element arrays in second of substrate or on second,
Wherein, multiimage element arrays is aimed at focusing element array substantially,
And wherein, image component be according to the brightness of the corresponding region of input gray level or colored image or color grade by area modulation,
Make when from first surface finder, comprise that the enlarged image of the image component shape of at least one amplified version is visible, and when from second finder, gray scale or colored image are visible.
Preferably, image component is amplitude modulation(PAM).In the preferred form of the present invention, carry out amplitude modulation(PAM) by rugosity or the surface area of line that changes image component.
As an alternative, image component can be warbled.For example, multiimage element can have substantially the same integral cycle with focusing element array, but in some regions, can save multiimage element to produce the variation of brightness when second of facilities for observation.But this can cause the slight decline of enlarged image quality improve the contrast for observing gray scale or colored image.
Therefore when from first surface finder, the effect being produced by safety feature comprises More's enlarge-effect, simultaneously when from opposite face finder, device (for clear area unexpectedly) produces the immutable image of diverse optical effect such as optics (for example, portrait).With respect to known safety feature, this combination of two dissimilar optical effects in the same area of device provides more easily the security feature of identification and the security of enhancing.
For example, because the image component array that can use in the single surface of device and be applied in single manufacturing step (, by impression) produces two kinds of different effects, so this device has also increased the easness of manufacturing.
In a specific preferred embodiment, enlarged image is that Optical Variable Imaging and gray scale or colored image are the immutable images of optics.
Can produce monochromatic macro-scale image by the interaction of diffraction and non-diffraction element.Utilizing under the condition of multiple or diffused light source illumination, negative (contrast inversion) that in reflection, image is shown as input picture represent, and image is shown as the just expression of input picture in transmission.Conventionally the pure diffraction instrument under this lighting condition will produce the very light image of low diffraction efficiency, and image is too light and can not identify in some cases.
Optical safety device can comprise two or more multiimage element arrays.Therefore, for example, in the time of first area from first surface finder, an enlarged image can be visible, and in the time of second area from first surface finder, second different enlarged image is visible simultaneously.When from second finder, the gray scale of tone or colored image are visible.Therefore additional another repeat element array has increased the complicacy of installing the effects visible producing, and has also increased the difficulty of forging.
In a preferred embodiment, be arranged in the Focus width of concentrating element of second object plane of locating of device approximately identical with the width of image component or at 20% of the width of image component.This allows to use the larger image component with given substrate thickness, and the enlarged image effect of expecting is provided simultaneously.
Preferably, control the magnification of the image component in enlarged image by the pitch difference between focusing element array and image component array and/or rotating deviation.
In one embodiment, image component is impression image component, but image component can also be printing images element.Can reach higher resolution because adopt impression to process, when from first surface finder, cause enlarged image more clearly, so impression image component is particularly preferred.In a method that amplitude modulation(PAM) is applied to image component, each impression image component has the degree of depth, and this degree of depth is by area modulation.
If suppose that the resolution of printing the image component under concentrating element to be contained in is enough high, can also use printing technology.
In a specific preferred embodiment, image component comprises the diffraction or the long optical grating element of wavelet that are surrounded by non-diffraction background area, and wherein, enlarged image shows coloured optical variable effect.As an alternative, image component can be to be included the non-diffraction image component that the background area of diffraction or the long optical grating element of wavelet surrounds, and wherein, the background area of enlarged image shows coloured optical variable effect.
" wavelet long " or zero order light grid element are only under zero utmost point diffraction of the illumination of the light of setted wavelength, to produce the surface relief of Zero-order diffractive of light or the micromechanism of burying.Conventionally, the cycle of this zero level structure is less than the lambda1-wavelength of expectation.For this reason, Zero-order diffractive grating is sometimes also referred to as sub-wave length grating.
The use of the long image component of diffraction or wavelet (or non-diffraction image component) in diffraction background has advantageously provided the device that produces significant visual effect under mirror-reflection and diffusion or low-light level condition.
Concentrating element can be refractive micro lenses.As an alternative, concentrating element can be Fresnel (Fresnel) lens, diffraction zone plate or photon screen.For example, as at US7,368,744 ground of describing, exemplary photon screen be therein a series of holes along the Fresnel region of Fresnel region plate by pseudorandom distribute.
In another preferred embodiment of a first aspect of the present invention, at least one in first surface or on first surface the first repeat element array is the image component that forms the first image, and at least one second array in second or on second is the image component that forms the second image, image component one of at least in the first repeat element array and the second repeat element array is opaque at least partly, thereby in the time of finder from the reflection of first surface, the first image is visible, and in the time of finder from the reflection of second, the second image is visible.
According to a third aspect of the invention we, provide a kind of optical safety device, having comprised:
Transparent or translucent substrate,
At least one first multiimage element arrays of formation the first image in the first surface of substrate or on first surface,
At least one second multiimage element arrays of formation the second image on second of substrate,
Wherein, at least one second multiimage element arrays is aimed at at least one first multiimage element arrays substantially, and
At least one first multiimage element arrays and/or at least one the second multiimage element arrays are opaque at least partly,
Thereby in the time of finder from the reflection of first surface, the first image is visible, and in the time of finder from the reflection of second, the second image is visible.
Preferably, the image component of the first image component array and the second image component array is all opaque at least partly.Image component one of at least in array can be completely opaque.In one embodiment, the image component one of at least in array is the opaque and partially transparent of part, and to make the first image and the second image combining to form the 3rd image, when observe safety feature in transmission time, the 3rd image is visible.
Image component one of at least in the first array and the second array can be by the colored image element of area modulation according to the color of the corresponding region of input colored image or brightness degree.
As an alternative, or in addition, the image component one of at least in the first array and the second array can be by the gray level image element of area modulation according to the brightness degree of the corresponding region of input gray level image.
Image component at least one side of substrate can be printing images element.Image component on the two sides of substrate can be printing images element.As an alternative, the image component at least one side of substrate can be impression image component.In other embodiments, the image component at least one side of substrate can be diffraction structure or sub-wavelength structure.
In another embodiment, multiimage element at least one side of substrate is to be included the non-diffraction image component that the background area of diffraction or sub-wavelength grate structure surrounds, wherein, when from this face finder, the background area of visible image shows coloured optical variable effect.
In the fourth embodiment of the present invention, a kind of method of manufacturing safety feature is provided, comprise the steps:
In first surface transparent or translucent substrate or form at least one first repeat element array on first surface; And
In second of substrate or on second, form at least one second repeat element array,
Wherein, at least one second repeat element array is aimed at at least one first repeat element array substantially,
Make when from first surface finder, the first image is visible, and when from second finder, the second image is visible.
Preferably, the method comprises the step of according to the brightness of input gray level or colored image or color grade, the repeat element at least one side of substrate being carried out area modulation.
The method is preferably incorporated in the upper printing of at least one side repeat element of substrate to form the step of multiimage element.In one embodiment, the method is included on the two sides of substrate and prints repeat element to form the step of multiimage element.Can use various printing processes with printing multiimage element, comprise hectographic printing, flexographic printing, intaglio printing and drum-type printing.Simultan printing is particularly preferred printing process, and the method can be for form multiimage element simultaneously on the relative face of substrate.
The method can be included in the upper step of repeat element as diffraction image element that form of at least one side of substrate.
The method can be included in the step of the upper impression of at least one side repeat element of substrate.
In particularly preferred method, the step that forms the step of at least one the first repeat element array and form at least one the second image component array is carried out substantially simultaneously.
Aspect the 5th, the invention provides a kind of method of manufacturing safety feature, comprise the steps:
In first surface transparent or translucent substrate or form focusing element array on first surface; And
That formation has a substantially mutually the same shape and be arranged in substrate second in or second at least one multiimage element arrays,
Wherein, multiimage element arrays is aimed at focusing element array substantially,
And wherein, image component be according to the brightness degree of the corresponding region of input gray level or colored image by area modulation,
Make when from first surface finder, the image component shape of at least one amplified version is visible, and when from second finder, gray scale or colored image are visible.
The method can also comprise the step that can impress radiation curable ink and be applied to first surface and/or second.
Preferably, the method also comprise by impression concentrating element is formed on to the step in the impressed radiation curable ink in first surface.The method can also comprise by impression image component is formed on to the step in the impressed radiation curable ink in second.
Can impress radiation curable ink
The term using in literary composition can impress radiation curable ink and refer to any ink, coating or other coatings, its can in printing process, be applied in substrate and in the time that it is softening, can be stamped to form embossment structure and by radiation curing to fix printable embossment structure.There is not solidification process before being stamped can impress radiation curable ink, but can or with imprint step, solidification process occur substantially after impression simultaneously.Preferably by ultraviolet (UV) radiation, radiation curable ink is cured.As an alternative, radiation curable ink can solidify such as electron beam or X ray by other forms of radiation.
Transparent or the translucent ink that radiation curable ink is preferably formed by transparent resin material.This transparent or translucent ink is specially adapted to print printing opacity safety element such as sub-wave length grating, transmission diffraction grating and lens arrangement.
In a particularly preferred embodiment, transparent or translucent ink preferably comprises that acrylic UV curing transparent can impress coating or coating.
Can obtain this UV from different manufacturers coating material solidified, comprise Kingfisher ink company limited, product ultraviolet ray type UVF-203 or similar.As an alternative, radiation curing can embossing coating can for example, based on other compounds, nitrocellulose.
Have been found that the radiation curable ink and the coating that in literary composition, use are specially adapted to comprise the impression micromechanism such as the diffraction structure of diffraction grating and hologram, and lenticule and lens arra.But they also can be stamped out larger embossment structure, such as non-diffraction optics variable device.
Preferably in the substantially the same time, ink is impressed and be cured by ultraviolet ray (UV) radiation.In particularly preferred embodiment, in intaglio printing process, apply and impress radiation curable ink in the substantially the same time.
Preferably, in order to be applicable to intaglio printing, the viscosity of radiation curable ink drops on from approximately 20 centipoises to the scope of approximately 175 centipoises substantially, and more preferably from approximately 30 centipoises to the scope of approximately 150 centipoises.Can be by measuring definite viscosity of time of discharging coating from Zahn cup #2.With the viscosity of sample of discharging for 20 seconds be 30 centipoises, and with the viscosity of the sample of discharge in 63 seconds be 150 centipoises.
For some polymeric substrates, need to before applying radiation curable ink, apply middle layer to improve the clinging power of the stamping structure being formed by ink to substrate to substrate.Middle layer preferably includes prime coat, and more preferably prime coat comprises polyethyleneimine.Prime coat can also comprise crosslinking chemical, for example multi-functional isocyanates.The example that is applicable to other priming paint of the present invention comprises: hydroxyl stops polymkeric substance; Hydroxyl terminated polyester base co-polymer; Be cross-linked or uncrosslinked hydroxylation acrylate; Polyurethane; And UV solidifies negative ion or cationic acrylate.The example of suitable crosslinking chemical comprises: isocyanates; Polyaziridine; Zirconium-containing compound; Aluminium acetylacetonate; Melamine; And carbodiimides.
For different substrates and embossed ink structure, the type of priming paint can be different.Preferably, select substantially not affect the priming paint of the optical characteristics of embossed ink structure.
Preferably, sequentially carry out the step that forms focusing element array and the step that forms image component array.But, in certain embodiments, for example, in the time applying concentrating element and image component by impression, can carry out these steps simultaneously.
Method can also comprise the step that printable radiation curable ink is cured.Preferably, this step is carried out with imprint step substantially simultaneously.
In a preferred embodiment, image component comprises the diffraction or the long optical grating element of wavelet that are surrounded by non-diffraction background area.As an alternative, image component can be to be included the non-diffraction image component that the background area of diffraction or the long optical grating element of wavelet surrounds.
Can by using the printing of image component shape be stamped into diffraction or the background of the long optical grating element of wavelet on form image component as non-diffraction structure.As an alternative, can be by diffraction or the long optical grating element of wavelet be stamped in non-diffraction background to form image component.
On the other hand, provide a kind of safety feature that comprises according to the present invention first, second or the third aspect, or according to the present invention the 4th or the secure file of the safety feature of the 5th aspect manufacturing.This safety feature can be formed on or be applied in the window of secure file.
Brief description of the drawings
Preferred embodiment of the present invention is described with reference to the accompanying drawings, in the accompanying drawings:
Fig. 1 is the sectional view of an embodiment of safety arrangement in accordance with the present invention;
Fig. 2 shows the safety feature as Fig. 1 of a part for secure file;
Fig. 3 shows and a series of images element using together with safety feature according to an embodiment of the invention;
Fig. 4 shows the image component of Fig. 3 observed by the array of concentrating element;
Fig. 5 and Fig. 6 show the modification of the embodiment of Fig. 3 and Fig. 4;
Fig. 7 shows image component and is printed on another embodiment of safety feature wherein;
Fig. 8 shows the immutable image of optics of seeing from the observer of the safety feature of focusing element array opposite side observation Fig. 3; And
Fig. 9 shows and is applicable to manufacture according to the embodiment of the equipment of the safety feature of above-described embodiment or secure file;
Figure 10 shows the schematic sectional view of safety feature according to another embodiment of the present invention;
Figure 11 is the schematic sectional view in file window with the secure file of the safety feature of Figure 10;
Figure 12 shows the secure file in the time observing from the reflection of first surface with the visible Figure 11 of the first image;
Figure 13 shows the secure file in the time observing from the reflection of second with the visible Figure 11 of the second image;
Figure 14 shows the safety feature of secure file and the zoomed-in view of window region of Figure 12;
Figure 15 shows the safety feature of secure file and the zoomed-in view of window region of Figure 13; And
Figure 16 shows the revision for execution example with visible the 3rd Figure 12 of image and the secure file of Figure 15 in the time observing in transmission.
Embodiment
Figure 1 illustrates the partial cross section with safety feature 10 transparent or translucent substrate 15, this substrate 15 has first surface 16 and second 17.The array of concentrating element is formed on first surface 16 with the form of part spherical microlens 20, and the array of corresponding multiimage element 30 is formed on second 17.
Concentrating element 20 can be formed directly in the surface of first surface 16 of substrate 15, is applied in the impressed radiation curable ink of first surface 16 by intaglio printing but be for example preferably formed on.
Image component 30 can be to be for example applied to the surperficial printing images element of second 17 by flexographic printing.But preferably, image component is to be applied to and to be stamped into the impression image component that can impress in radiation curable ink and ink solidification is formed on second 17, by embossment structure array by impressing radiation curable ink.
Fig. 2 is the partial cross section that comprises the secure file 100 of safety feature 10.Secure file comprises the transparent or translucent substrate 105 with first surface 106 and second 107.The layer of opaque ink 108, opaque ink 109 is applied to respectively first surface 106 except the residing window area of safety feature 10 and second 107.Preferably, apply opaque ink 108,109 form safety feature 10 in window area before, to be easier to that safety feature 10 is aimed at window area.
Referring now to Fig. 3, Fig. 4 and Fig. 8, show the more details of safety feature 10.Generate the array of the image component 30 of second 17 that is applied to device 10 by the input picture 200 of establishment shake or halftone version.In the example depicted in fig. 8, each pixel of monochrome bit Figure 200 maps in three brightness degrees, and each brightness degree is corresponding to the rugosity (amplitude modulation(PAM)) of the specific line of the image component as shown in the zoomed-in view in the region 211,212,213 of the image component array 210 on right side.In the embodiment of alternative, can modulate according to the brightness degree of input picture 200 space distribution of (frequency modulation (PFM)) image component 30 in second 17 of substrate, but amplitude modulation(PAM) is preferred.
Each image-region 211,212,213 comprises pixel 25, and pixel 25 is the square area with the size corresponding with the size of overlapping part sphere lens 20.Pixel 25 will be generally the magnitude of 45 square microns to 65 square microns, but it should be noted that and can select greater or lesser size to be applicable to specific application.Also will recognize, pixel is not necessarily foursquare, but in many application, selects for convenience's sake square pixel.
Image-region 211 is corresponding with a part for the brightest area of input picture 200, and similarly comprises and produce the reflected light of maximum or the impression image component 30 of transmitted light, has the rugosity of maximum line.Time highlights that image-region 212 is positioned at image 200 divides, and therefore compared with image component 30, the rugosity of the line of the image component 31 of image-region 212 reduces slightly.Similarly, the image-region 213 that is positioned at the black region of input picture 200 has the image component 32 of the rugosity minimum of its line.
Image component 30,31,32 all has substantially the same shape, and the rugosity difference of its line only.The rugosity of line can be modulated to the degree that the resolution of the process for applying image component allows.For flexographic printing, minimum resolution is approximately 7 microns.For moulding process, minimum resolution is limited by the electron beam for creating impression block (master) or the resolution of other processes, and can be nanometer scale.Because moulding process allows the meticulousr classification between the rugosity of line, and thereby allow meticulousr brightness degree, thereby between different colours or luminance area, produce the effect seamlessly transitting, so moulding process is preferred.
When the spacing of two arrays is slightly different or rotatably when misalignment, the array of the array of lens 20 and image component 30, image component 31, image component 32 can produce More's enlarged image.For the magnification of the lens arra of cycle a and the image component array of cycle b by a 2/ Δ provides, and wherein, Δ=a-b is pitch difference.If the cycle a of lens arra and pattern matrix is identical, but its axis each other in θ angle, magnification is approximately 1/ (1-cos θ) so.
3 × 3 grids of the pixel 25 in Fig. 3 comprise three image components 30,31 and 32.Each image component 30,31 or 32 is the impression that surrounded by the region 35,36 or 37 of surface relief structure that comprises impression respectively or the non-diffraction element of printing.Surface relief structure in background area 35, background area 36 and background area 37 can have identical parameter (degree of depth of impression, spatial frequency, curvature, position angle) each other, if or need, surface relief parameter can change.
Also will recognize, and can form image component 30 to image component 32 by the not region of impression of pixel 25, and that is to say, except having the region on border of shape of image component 30,31 or 32, whole pixel 25 is stamped.
Surface relief structure can be the bright background area changing with viewing angle to produce it of diffraction.As an alternative, surface relief structure can be long (zero level) grating of wavelet all in all viewing angles with particular color.Advantageously, sub-wavelength structure also produces strong polarization effect conventionally, and thereby the position angle that changes for example, embossment structure between () pixel can cause the further authentication feature that can observe under polarisation filter.
The optical effect being produced by the device 10 of Fig. 1, Fig. 3, Fig. 4 and Fig. 8 is as follows.
In the time of first surface 16 finder 10 from substrate 15, due to the More's enlarge-effect being produced by lens 20, see single image element 30, image component 31, the image component 32 of version 130 at least one amplification and rotation.Although image component 30, image component 31, image component 32 are incomplete same, but the rugosity that can make its line differs enough little degree, the collective effect that the single image element by being sampled by lens 20 is produced is single sampled images " on average ".Image can also show as on the plane that floats over device 10 or under, and/or along with made device 10 recede and turn forward or tilt by observer, picture showing goes out to show positive parallax (orthoparallactic) motion.If use diffraction background area 35, diffraction background area 36 and diffraction background area 37, enlarged image 130 can also have bright color and optically-variable background.
In the time of second 17 finder 10 from substrate 15, single image element 30,31,32 is not exaggerated, and its size is too little and can not be perceived by naked eyes, (preferably 150 microns or less magnitude, more preferably be less than 70 microns, to such an extent as to the viewing distance perception of 20 centimetres less than), jointly produce the effect of monochrome or colored image 200.
Therefore, in the time observing from first surface 16 transparent or translucent substrate 15, device 10 instead intuitively produces the image that floats or move optically-variable, that amplify, and in the time observing from transparent or translucent substrate 15 second 17, device 10 produces that optics are immutable, the monochromatic or panchromatic image of tone.
Fig. 5 and Fig. 6 show the alternative embodiment that the impression image component 40,41 and 42 in pixel 25 is wherein surrounded by non-diffraction region 45.Image component 40,41 is different with 42 rugosity, and in the present embodiment, also comprises the long surface relief structure of diffraction or wavelet.Surface relief structure can have identical parameter (degree of depth of impression, spatial frequency, curvature, position angle) in each image component, or parameter can change from pixel to pixel or between the different rugosity of image component.In the time that scioptics 20 are observed, the embodiment of Fig. 5 and Fig. 6 produces the single image element 40,41,42 of version 140 at least one amplification and rotation according to the color of the single image element being sampled, and it is also coloured.For Fig. 3 and 4, in the time observing from transparent or translucent substrate 15 second 17, the device in Fig. 5 and Fig. 6 shows that optics is as shown in Figure 8 immutable, tone is monochromatic or full-colour image.
Fig. 7 shows a part of the another embodiment of the device producing by flexographic printing, and wherein, 3 × 3 grids of pixel 25 comprise the image component 50,51,52 by flexographic printing point 60 forms and diffracted background area 55,56,57 surrounds respectively.The shape of image component 50,51,52 substantially the same (shape of letter " A "), but the quantity difference of its flexographic printing point formed.
For the embodiment of Fig. 3 and Fig. 5, in the time observing from transparent or translucent substrate 15 second 17, device shows that optics is as shown in Figure 8 immutable, tone is monochromatic or full-colour image.
Referring now to Fig. 9, show for the manufacture of the embodiment of equipment of secure file that comprises the above-mentioned type device.
Printing and Embosser 500 schematically illustrated in Fig. 9 comprise feed unit 502, and this feed unit 502 is for supplying with sheet form base 501 to comprising each printing of opacification station (station) 504, the first printing station 506, impression station 510, the second printing station 606, the second impression station 610 and the 3rd printing station 514 and impressing station.
Substrate 501 is preferably made up of the polymeric material substantial transparent such as biaxial polypropylene (BOPP) or translucent, and can be supplied to continuously opacification station 504 from the material roller 503 at feed unit 502.Opacification station 504 comprises at least opacification device of one side at least one opaque layer being applied to substrate 501.Opacification device is preferably the form of printing element, and for example one or more photogravure roller 505 is for being applied to one or more opaque ink coating the one or both sides of substrate.But opacification station 504 likely can comprise that the opacification device of laminated units form is for being applied to one or more platy layer of at least part of opaque material such as paper or other fibrous materials at least one side of transparent substrates.
Preferably, be arranged as at least one opaque layer of saving on substrate one or both sides to form window district or half-window district at least one region at the opacification device 505 at 504 places, opacification station.
The first printing station 506 comprises the printing equipment 507,508 that is applied to substrate 501 for impressing radiation curable ink.Printing equipment can comprise at least one printing cylinder 507, for example photogravure roller, and the milky white transparent substrates of feeding between printing cylinder 507 and corresponding cylinder on opposite face in substrate or roller 508.
Arrange that printing equipment 507, printing equipment 508 are to be applied to radiation curable ink the first surface 16 that will impress at 510 places, impression station the substrate 501 of lens 20 thereon.Lens can be applied in the window region that the region by saving the opaque ink applying in 504 places, opacification station forms.
Impression station 510 comprises the imprinting apparatus that is preferably plate cylinder 511 and impression cylinder 512 forms.Imprinting apparatus 511,512 comprises and is arranged as the impression partial in the time of the nip of substrate through plate cylinder 511 and impression cylinder 512, the not same district of substrate being impressed.
Impression station 510 can also comprise radiation curing device 513, this radiation curing device 513 for substantially with ink impress to the while or almost immediately after ink is impressed, is cured impressing radiation curable ink, to form lens 20.As an alternative, independent curing station can be set.Radiation curing device preferably includes ultraviolet (UV) solidified cell for UV cured printing ink is cured, but can use the solidified cell of other types, for example, can use X ray or electron beam (EB) solidified cell for X ray or EB radiation curable ink.
The second printing station 606 comprises the printing equipment of second 17 607,608 that is applied to substrate 501 for impressing radiation curable ink.Printing equipment can comprise at least one printing cylinder 607, for example photogravure roller, and the milky white transparent substrates of feeding between printing cylinder 607 and corresponding cylinder on opposite face 16 in substrate 501 or roller 608.Printing equipment 607,608 is arranged as directly radiation curable ink being applied in the region of relative and aligning to second 17 of substrate 501 with lens 20.If lens 20 are applied to window area, radiation curable ink is applied to the window area on the opposite face of substrate 501.
Impression station 610 comprises the imprinting apparatus that is preferably plate cylinder 611 and impression cylinder 612 forms.Plate cylinder 611 carries the structure of image component 30 to 32 and/or image component 40 to 42, and if use impression background area 35 to 37,45 or impression background area 55 to 57, plate cylinder 611 also carries the structure of those background areas.After substrate 501 is through impression station 610, substrate 501 carries the array of lens arrangement 20 on its first surface 16, and with the image component 30 to 32 of array lens 20 substantial registration or the corresponding array of image component 40 to 42.
Impression station 610 can also comprise radiation curing device 613, this radiation curing device 613 for substantially with ink is impressed simultaneously or almost immediately after ink is impressed, be cured impressing radiation curable ink, to form solidified imprinting image component 30 to 32 or solidified imprinting image component 40 to 42.
Also will recognize, if use printing images element 50 to 52, the second printing station 606 and the second impression station 610 can replace with printing station, for example flexographic printing station.
The 3rd printing station 514 comprises the printing equipment for print characteristics being applied to substrate.Printing equipment preferably includes the printing cylinder 516 such as intaglio plate, hectograph or gravure cylinder, and can be for various print characteristics are applied to substrate.For example, can be for applying the security feature of printing at the printing cylinder 516 at the second printing station 514 places, make its with impression safety element aims at, adjacent or surround impress safety element.
In the operation of equipment, supply with transparent substrates 501 from feed unit 502 by opacification station 504, in opacification station 504, at least one opaque layer is applied at least one side of substrate 501.Then, at least part of opaque substrate 501 is fed by the first printing station 506, in the first printing station 506, can impress radiation curable ink and be applied to district to be imprinted (for example, window region) to form lens 20.
Then, substrate 501 is fed by impression and stands 510, in impression station 510, the ink area previously having applied is impressed on the first surface 16 in substrate 501, form lenticule 20.Then, preferably by radiation, radiation curable ink is cured to fix impression lens 20 at 510 places, impression station.
Substrate 501 feeding is aimed at impression lens 20 with formation on second 17 of substrate 501 substantially by the second printing station 606 and the second impression station 610 in order impression image component 30 to 32 or impression image component 40 to 42.
Equipment 500 can also comprise for by more printing or impression feature are applied to more printing station or the impression station (not shown) of substrate 501.
Also can make opacification erect-position after impression station 510, and at least one side that this opacification station is applied to substrate 501 by least one opaque layer except the region at impression lens 20 and impression image component 30 to 32 or impression image component 40 to 42 is to form window.
In certain embodiments, can impress on the two sides of substrate in addition simultaneously, lens 20 and image component 30 to 32 or 40 to 42 while of image component substantial registration are formed on the opposite face of substrate.
Figure 10 to Figure 16 shows according to the present invention when producing the safety feature of different images and the another embodiment of secure file from the reflection of the opposite face of device and while observation in transmission.
Figure 10 illustrates the partial cross section with safety feature 700 transparent or translucent substrate 705, transparent or translucent substrate 705 has first surface 706 and second 707.For the first array 712 of the repeat element of image component 720 forms is formed on first surface 706, and for the second array 713 of the repeat element of image component 730 forms is formed on second 707, substantially aim at the image component 730 of the first array 713.
The image component 720,730 of the first array 712 and the second array 713 is preferably formed as fine rule or point, and between point, has and allow light transmission by interval 721,722 transparent or translucent substrate.In the situation that using line, line can be straight, bending, wavy or adopt other shapes.When using when some, preferably circle of point, but also can adopt other rule or irregular shapes.In each case, the image component 730 of the second array 713 is preferably substantially the same with the shape of the image component 720 of the first array 712, and substantial registration.
The image component the 720, the 730th of the first array 712 and the second array 713, coloured or gray level image element, the color of the respective regions of its or gray level image coloured according to input or brightness degree are by area modulation.
Figure 11 is the partial cross section that comprises the secure file 800 of safety feature 700.Secure file comprises the transparent or translucent substrate 805 with first surface 806 and second 807.The layer of opaque ink 808,809 is applied to respectively first surface 806 except the residing window area 810 of safety feature 700 and second 807.Preferably, apply opaque ink 808,809 form safety feature 700 in window 710 before, safety feature 700 is aimed at window being easier to.
Figure 12 and 13 shows the secure file 800 in the time observing from first surface 806 and second 's 807 reflection respectively.Figure 14 and Figure 15 show respectively the view of the window area 810 of the secure file shown in Figure 12 and Figure 13 and the amplification of safety feature 700.
Image component the 720, the 730th, opaque at least partly.Therefore, in the time observing safety feature 700 along the direction that is substantially perpendicular to base plane from the reflection of first surface 806, only the image component 720 of the first array 712 is visible, and the first coloured or gray level image 725 therefore being formed by image component 720 as shown in Figure 12 and Figure 14 is visible.Similarly, in the time observing safety feature 700 along the direction that is substantially perpendicular to base plane from the reflection of second 807, only the image component 730 of the first array 713 is visible, and the first coloured or gray level image 735 therefore being formed by image component 730 as shown in Figure 13 and Figure 15 is visible.
Only, as example, it is the simple black white image 725 of four jiaos of star shape that Figure 12 and Figure 14 show.Can form such image by the opaque white image element that forms the opaque black image element of star shape and the background of formation star.Figure 13 and Figure 15 show by opaque gray line or point are formed to star shape and opaque white wire or point are formed to the simple gray image 735 for octagonal star shape that the background of star forms.But, can form more complicated gray level image by the area modulation of the brightness degree of more complicated gray level image element according to the brightness degree of the respective regions of input gray level image.
Also can have and have the colored image element of colo(u)r streak or the color of point or the area modulation of brightness degree to form coloured or multicolor image by use according to color or the brightness degree of the respective regions of input colored image.
When using on two sides substantially when complete opaque image component, in reflection and transmission the first image only from first surface, and reflect and transmission in the second image only from second.In other embodiments, such as shown in figure 16, can by use and partially transparent opaque in part or translucent first surface and second upper image component on one of be at least visible one or more appended drawings picture to allow optical transmission in being formed on transmission.For example, if it is completely opaque forming the image component 720 of the first array of four jiaos of starriness images 725, and the image component 730 of the second array that forms octagonal star 735 is the opaque and partially transparent of part, in the time of finder from the transmission of second, the 3rd image 740 of the combination that comprises four jiaos of stars 725 and octagonal star 735 is visible, as shown in figure 16.
The image component 720,730 of one or two in the first array and the second array can be to be for example applied to the surface of substrate or the printing images element on multiple surfaces by flexographic printing or Simultan printing.As an alternative, the image component 720,730 of one or two in the first array and the second array can be impression image component.Can be applied to substrate, the array of embossment structure is stamped into and can impresses radiation curable ink and make ink solidification form impression image component by impressing radiation curable ink.For example, translucent coloured radiation curable ink can be used to form the impression image component of partially transparent, therefore, in transmission combination image from least one side.
In another amendment, the image component at least one side of substrate is diffraction image element.Can form Optical Variable Imaging by diffraction image element, and printing images element forms the immutable image of optics conventionally.In one embodiment, the image component of the first array can be printing images to form the immutable image of optics, and the image component of the second array can be that diffraction image element is to form Optical Variable Imaging.
In another embodiment, the image component at least one side of substrate is the non-diffraction image component that diffracted or sub-wavelength grate structure surrounds, to make showing coloured optical variable effect from the background area of the visible synthetic image of this face of substrate.
The surface that can be applied to by impressing radiation curable ink substrate, is stamped into radiation curable ink by required diffraction or sub-wavelength structure, and makes ink solidification form diffraction image element or diffraction or sub-wavelength structure.
Can be for the manufacture of the secure file that comprises impression or diffraction image element or structure for the manufacture of the equipment being similar to reference to the described secure file of Fig. 9.In the time that the image component on the first array and the second array is printed element, can uses and there is more simply the installing with the first printing station of alternate figures 9 and the second printing station and impression station 506,510,606 and 610 of Simultan printing station.

Claims (46)

1. an optical safety device, comprising:
Transparent or translucent substrate,
At least one first repeat element array in the first surface of described substrate or on first surface,
At least one second repeat element array on second of described substrate,
Wherein, described at least one second repeat element array is aimed at at least one first element arrays substantially,
And wherein, in the time observing described device from described first surface, the first image is visible, and in the time observing described device from described second, the second image is visible.
2. optical safety device according to claim 1, wherein, the repeat element at least one side of described substrate is by area modulation according to the brightness of the corresponding region of input gray level or colored image or color grade.
3. optical safety device according to claim 2, wherein, the described repeat element at least one side of described substrate is amplitude modulation(PAM).
4. optical safety device according to claim 3, wherein, rugosity or the surface area of described repeat element are modulated.
5. according to optical safety device in any one of the preceding claims wherein, wherein, described the first image is that Optical Variable Imaging and described the second image are the immutable images of optics.
6. according to optical safety device in any one of the preceding claims wherein, wherein, described the first image and described the second image are the immutable images of optics.
7. according to optical safety device in any one of the preceding claims wherein, be included at least one side of described substrate or two or more repeat element arrays in one side at least.
8. according to optical safety device in any one of the preceding claims wherein, wherein, the described repeat element at least one side of described substrate is impression image component.
9. optical safety device according to claim 8, wherein, each impression image component has the degree of depth, and the described degree of depth is by area modulation.
10. according to optical safety device in any one of the preceding claims wherein, wherein, the described repeat element at least one side of described substrate is printing images element.
11. according to optical safety device in any one of the preceding claims wherein, and wherein, the described repeat element at least one side of described substrate is diffraction image element.
12. according to optical safety device in any one of the preceding claims wherein, wherein, described repeat element at least one side of described substrate is to be included the non-diffraction image component that the background area of diffraction or sub-wavelength grate structure surrounds, and the background area of image on described of described substrate shows coloured optical variable effect.
13. according to optical safety device in any one of the preceding claims wherein, wherein
Described at least one first repeat element array in the first surface of described substrate or on first surface is focusing element array, and
Described at least one second repeat element array in second of described substrate or on second is the image component array substantially with mutually the same shape,
And wherein, the image component of at least one the second array be according to the brightness degree of the corresponding region of input gray level or colored image by area modulation,
Make, in the time observing described device from described first surface, comprise that the enlarged image of the described image component shape of at least one amplified version is visible, and in the time observing described device from described second, described gray scale or colored image to be visible.
14. 1 kinds of optical safety devices, comprising:
Transparent or translucent substrate,
Focusing element array in the first surface of described substrate or on first surface, and
Substantially there is mutually the same shape and be disposed at least one the multiimage element arrays in second of described substrate or on second,
Wherein, described multiimage element arrays is aimed at described focusing element array substantially,
And wherein, described image component be according to the brightness degree of the corresponding region of input gray level or colored image by area modulation,
Make, in the time observing described device from described first surface, comprise that the enlarged image of the described image component shape of at least one amplified version is visible, and in the time observing described device from described second, described gray scale or colored image to be visible.
15. according to the optical safety device described in claim 13 or 14, wherein, be arranged in the Focus width of described concentrating element of second object plane of locating of described device approximately identical with the width of described image component or at 20% of the width of described image component.
16. optical safety devices according to claim 14, wherein, described image component is to be included the non-diffraction image component that the background area of diffraction or sub-wavelength grate structure surrounds, and the background area of described enlarged image shows coloured optical variable effect.
17. optical safety devices according to claim 14, wherein, described image component comprises the diffraction or the sub-wavelength grate structure that are surrounded by non-diffraction background area, and described enlarged image shows coloured optical variable effect.
18. according to claim 13 to the optical safety device described in any one in 17, and wherein, described concentrating element is refractive micro lenses.
19. according to claim 13 to the optical safety device described in any one in 17, and wherein, described concentrating element is Fresnel Lenses, diffraction zone plate or photon screen.
20. according to the optical safety device described in any one in claim 1 to 12, wherein, at least one first repeat element array in described first surface or on described first surface is the image component that forms the first image, at least one second array in described second or on described second is the image component that forms the second image, described image component one of at least in described the first repeat element array and described the second repeat element array is opaque at least partly, thereby when observe described device from the reflection of described first surface time, described the first image is visible, and when observe described device from the reflection of described second time, described the second image is visible.
21. 1 kinds of optical safety devices, comprising:
Transparent or translucent substrate,
At least one first multiimage element arrays of formation the first image in the first surface of described substrate or on first surface,
At least one second multiimage element arrays of formation the second image on second of described substrate,
Wherein, described at least one second multiimage element arrays is aimed at described at least one first multiimage element arrays substantially, and
Described at least one first multiimage element arrays and/or described at least one second multiimage element arrays are opaque at least partly,
Thereby when observe described device from the reflection of described first surface time, described the first image is visible, and when observe described device from the reflection of described second time, described the second image is visible.
22. according to the optical safety device described in claim 20 or 21, and wherein, the image component one of at least in the first array and the second array is completely opaque.
23. according to the optical safety device described in any one in claim 20 to 22, wherein, image component one of at least in the first repeat array and the second repeat array is the opaque and partially transparent of part, make described the first image and described the second image combining to form the 3rd image, when observe described safety feature in transmission time, described the 3rd image is visible.
24. according to the optical safety device described in any one in claim 20 to 23, wherein, the image component one of at least in the first array and the second array is by the colored image element of area modulation according to the color of the corresponding region of input colored image or brightness degree.
25. according to the optical safety device described in any one in claim 20 to 24, and wherein, the image component one of at least in the first array and the second array is by the gray level image element of area modulation according to the brightness degree of the corresponding region of input gray level image.
26. according to the optical safety device described in any one in claim 20 to 25, and wherein, the described image component at least one side of described substrate is printing images element.
27. according to the optical safety device described in any one in claim 20 to 26, and wherein, the described image component at least one side of described substrate is impression image component.
28. according to the optical safety device described in any one in claim 20 to 27, and wherein, the described image component at least one side of described substrate is diffraction structure or sub-wavelength structure.
29. according to the optical safety device described in any one in claim 20 to 27, wherein, described multiimage element at least one side of described substrate is to be included the non-diffraction image component that the background area of diffraction or sub-wavelength grate structure surrounds, wherein, in the time observing described device from described, the background area of visible image shows coloured optical variable effect.
Manufacture the method for safety feature, comprise the steps: for 30. 1 kinds
In first surface transparent or translucent substrate or form at least one first repeat element array on first surface; And
In second of described substrate or on second, form at least one second repeat element array,
Wherein, described at least one second repeat element array is aimed at described at least one first repeat element array substantially,
Make in the time observing described device from described first surface, the first image is visible, and in the time observing described device from described second, the second image is visible.
31. methods according to claim 30, comprise the step of according to the brightness of input gray level or colored image or color grade, the described repeat element at least one side of described substrate being carried out area modulation.
32. according to the method described in claim 30 or 31, is included in the described repeat element of the upper printing of at least one side of described substrate to form the step of multiimage element.
33. methods according to claim 32, are included on the two sides of described substrate and print described repeat element to form the step of multiimage element.
34. methods according to claim 33, wherein, are used Simultan to print to form described multiimage element.
35. according to the method described in any one in claim 30 to 32, is included in the upper step of described repeat element as diffraction image element that form of at least one side of described substrate.
36. according to the method described in any one in claim 30 to 32 or 35, is included in the step of the described repeat element of the upper impression of at least one side of described substrate.
37. according to the method described in any one in claim 30 to 35, and wherein, the step that forms the step of described at least one the first repeat element array and form at least one the second image component array is carried out substantially simultaneously.
Manufacture the method for safety feature, comprise the steps: for 38. 1 kinds
In first surface transparent or translucent substrate or form focusing element array on first surface; And
In second of described substrate or on second, form at least one the multiimage element arrays being substantially of similar shape each other,
Wherein, described multiimage element arrays is aimed at described focusing element array substantially,
And wherein, described image component be according to the brightness of the corresponding region of input gray level or colored image or color grade by area modulation,
Make, in the time observing described device from described first surface, comprise that the enlarged image of the described image component shape of at least one amplified version is visible, and in the time observing described device from described second, described gray scale or colored image to be visible.
39. according to the method described in claim 38, also comprises the step that can impress radiation curable ink and be applied to described first surface and/or described second.
40. according to the method described in claim 39, also comprises described concentrating element is stamped into the step in the impressed radiation curable ink on described first surface.
41. according to the method described in claim 39 or 40, also comprises described image component is stamped into the described step impressing in radiation curable ink on described second.
42. according to the method described in any one in claim 39 to 41, also comprises and impresses to described the step that cured printing ink is cured.
43. according to the method described in claim 42, and wherein, described curing schedule is carried out with described imprint step substantially simultaneously.
44. 1 kinds comprise according to the safety feature described in any one in claim 1 to 29 or according to the secure file of the safety feature of any one manufacturing in claim 30 to 43.
45. according to the secure file described in claim 44, and wherein, described safety feature is formed in the window of described secure file, or described safety feature is applied to the window of described secure file.
46. according to the secure file described in claim 45, has transparent or translucent substrate, and wherein, applies at least one opaque layer and form at least one side of described window by the described substrate except the region of described window.
CN201280063039.7A 2011-10-19 2012-10-17 Security device Expired - Fee Related CN104011742B (en)

Applications Claiming Priority (3)

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FR1159424 2011-10-19
FR1159424A FR2966269A1 (en) 2010-10-19 2011-10-19 Optical safety device for use in safety document, has image elements modulated by regions along brilliance levels of corresponding regions of gray-level input image or color input image to view gray-level input image or color input image
PCT/AU2012/001255 WO2013056299A1 (en) 2011-10-19 2012-10-17 Security device

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GB (1) GB2513729A (en)
MX (1) MX337442B (en)
WO (1) WO2013056299A1 (en)

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GB201407098D0 (en) 2014-06-04
BR112014009513A2 (en) 2019-09-24
MX2014004574A (en) 2015-01-26
WO2013056299A1 (en) 2013-04-25
AU2012325669A1 (en) 2014-05-29
CN104011742B (en) 2017-04-26
CH707318B1 (en) 2017-07-14
GB2513729A (en) 2014-11-05
MX337442B (en) 2016-03-03

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