EP3033739A1 - Verfahren und vorrichtung zur prüfung eines sicherheitselements eines sicherheitsdokuments - Google Patents
Verfahren und vorrichtung zur prüfung eines sicherheitselements eines sicherheitsdokumentsInfo
- Publication number
- EP3033739A1 EP3033739A1 EP14755998.3A EP14755998A EP3033739A1 EP 3033739 A1 EP3033739 A1 EP 3033739A1 EP 14755998 A EP14755998 A EP 14755998A EP 3033739 A1 EP3033739 A1 EP 3033739A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intensity
- angle
- reflection
- substance
- polarization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- 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
- G07D7/003—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 security 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
-
- 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
- G07D7/121—Apparatus characterised by sensor details
Definitions
- the invention relates to a method and a device for testing a
- Value or security documents may contain one or more security elements, depending on a verification of a security element, e.g. the authenticity of the value or security document is verifiable. For example, To identify counterfeits of such documents, it is desirable to provide methods and apparatus for reliably testing such security elements.
- EP 1 748 903 B1 describes various effect pigments. These effect pigments can form a security element or be part of a security element.
- Machine-readable security element for security products The document describes optically variable, platelet-shaped effect pigments which have at least two and at most four optically clearly distinguishable discrete colors under at least two different illumination or viewing angles.
- the security element with at least one particulate substance with
- DE 10 2007 063 415 A1 discloses a method and a corresponding device for recognizing a product or information relating to the product.
- the method identifies a hidden coding carried by the product, the coding being given by a set of ellipsometric parameters, the method comprising the steps of:
- Verification system includes an optical system, a transport apparatus and an analyzer.
- the optical system comprises one or more light sources for generating a narrowband or broadband light beam.
- the transport apparatus cooperates with the light sources and is designed such that the object is positioned such that one or more light beams strike a section in which the security feature is to be arranged.
- the analysis device receives the light rays reflected or transmitted by the object and is adapted such that optical properties of the light rays at different angles and / or
- Wavelengths are analyzable to verify the authenticity of the object.
- Verification can be done depending on the effects produced by the optically variable effect pigments. For example, for example, a color shift effect generated by the optically variable effect pigments is available for verification.
- optically variable effect pigments especially the color shift effect
- the effect produced by optically variable effect pigments e.g. the color shift effect
- the optical verification methods which operate on the basis of the generated effect, can verify an optically variable effect pigment, although in fact another effect pigment is present, thereby causing a mis-verification.
- Electroluminescent pigments allow verification as a function of emitted electroluminescent radiation when such an electroluminescent pigment, e.g. by an electric field, is excited.
- Illuminate illumination parameters and to determine an intensity of polarized with a certain polarization portion of the reflected light from the security element, in particular at different angles of reflection. Depending on the intensity, it can then be concluded that there is an effect pigment in the security element and optionally a specific type of effect pigment.
- Proposed is a method for testing a security element of a
- the security element can be in or on the
- the security element can be at least one substance with optically variable
- the substance may in particular be a particulate, preferably a powdery substance.
- a particulate substance may in particular also comprise platelet-shaped particles.
- the substance may be present in the form of a pigment.
- the security element may contain so-called field displacement elements which form the substance with optically variable properties.
- Field displacement elements can e.g. of dielectric material with a suitably highly selected one
- the field strengths required for exciting the electroluminescence of electroluminescent pigments in said gaps, wherein the field displacement elements, in particular with regard to the size of the spaces left between them for the desired reinforcement effect can be suitably dimensioned.
- a particularly effective field compression in the gaps left by the field displacement elements can be achieved by forming the field displacement elements of electrically conductive material so that they form electrically isolated, so-called "floating" electrodes from their surroundings.
- Field displacement elements may have a lateral size of up to about 500 ⁇ , in particular a size between 2 ⁇ and 100 ⁇ .
- the electroluminescent pigments used For a specific influencing and focusing of the electric field that can be adapted to the electroluminescent pigments used, the
- Field displacement elements advantageously by printing technology, so for example, using a conventional printing process, such as gravure printing or screen printing applied to a support body of the security document.
- Security element forming marking layer to be incorporated.
- the proposed method is also suitable for testing a security element with an optically variable substance, which is not as
- Field displacement element is formed or includes such field displacement elements. It is also not absolutely necessary that the security element contains an electroluminescent substance, for example electroluminescent pigments.
- the substance with optically variable properties can also be referred to as a so-called effect pigment or comprise such effect pigments.
- the substance with optically variable properties can under different lighting and / or Viewing angles leave a different visually perceptible color and / or brightness impression. For different color impressions, this property can be called a color flop.
- substances which have or produce a color flop produce in the fabric produced therewith
- the optically variable substance may be optically clear under at least two different illumination or viewing angles at least two and at most four, but preferably at two different illumination or viewing angles two or below three different illumination or viewing angles
- the substance used according to the invention with the optically variable properties in the security element containing it is present in an oriented form, i. that they are almost parallel to the surfaces provided with the security element of the
- platelet-shaped effect pigments can be used as the optically variable substance.
- platelet-like effect pigments for example, the commercially available interference pigments, which are available under the names Iriodin®, Colorstream®, Xirallic®, Lustrepak®, Colorcrypt®, Colorcode® and Securalic® from Merck KGaA, Mearlin® from Mearl , Metallic effect pigments from Eckhard and goniochromatic (optically variable) effect pigments such as Variochrom® from BASF, Chromafflair® from Flex Products Inc., Helicone® from Wacker or holographic pigments from Spectratec and other similar commercially available pigments.
- enumeration is to be considered as illustrative and not restrictive.
- a security document is any document that is a physical entity that is against unauthorized production and / or corruption
- Security features is protected. Security features are features that make it difficult to falsify and / or duplicate compared to a simple copy at least. Physical entities that include or form a security feature may or may be referred to as security features
- a security document may include multiple security features and / or security elements. As defined herein, a security document is always a security element or includes such. Examples of security documents, which also include value documents that represent a value, include, for example, passports, identity cards,
- the proposed method comprises the following
- Security document in which the security element is arranged, illuminated with at least one predetermined illumination parameters. This can e.g. done by a light source.
- Illumination parameters here include e.g. an illumination angle.
- Illumination angle here denotes an incident or incidence angle of the light.
- This angle of incidence may be defined in an incident plane of light as an angle between an incident light and a normal vector of a surface of the security element or security document.
- a ray of light from the incoming light in this case runs in the plane of incidence which is oriented orthogonally to the previously explained surface of the security element or of the security document.
- a lighting parameter may be a wavelength of the incident light. Further, a lighting parameter may be a polarization state of the incident light. A polarization state can, for example, depending on a
- a lighting parameter can also be an intensity of the incident light.
- the at least one illumination parameter can be a user-adjustable illumination parameter.
- the light reflected by the security element is filtered into a first component having a first polarization.
- the first portion of the reflected light having a first polarization is also abbreviated to the first portion.
- a component or a component with a specific polarization is filtered out of the light reflected by the security element.
- Polarization angle of the first portion for example, in relation to a
- the reflection or Ausfallebene is oriented perpendicular to the previously explained surface of the security element or security document and a light beam of the reflected light in the reflection or Ausfallebene runs.
- the first portion may have a polarization angle of 90 °.
- Polarization angle also assume different values of 90 °. This will be further explained below.
- the filtering can in this case by a means for polarization filtering, in particular a so-called polarization filter, take place.
- a means for polarization filtering in particular a so-called polarization filter, take place.
- an intensity of the first portion of reflected light is determined, which is reflected at a reflection angle.
- Angle of reflection may here be an angle in a plane of reflection of the light as an angle between the reflected light and the normal vector of a surface of the light
- a light beam of the reflected light in this case runs in the reflection plane, which is orthogonal to the previously explained surface of the security element or the
- the reflection plane can also be referred to as a failure plane.
- the determination of the intensity takes place here for at least one, but preferably for several, mutually different, reflection angles.
- a verification of the presence of a substance with optically variable properties is carried out as a function of the intensity of the first portion.
- the intensity of the first component can be determined by a means for determining the intensity, for example an optical sensor.
- the type or the type of the substance is abbreviated as a kind.
- Verification of the security element also carried out depending on the identified type.
- One type characterizes a security element which consists of a predetermined material or a predetermined material composition. Also, the verification can be done depending on the angle of reflection, which can be quantified or determined for this purpose.
- the proposed method advantageously utilizes two effects produced by the optically variable substance.
- a polarization state of the incident light is changed by the substance having optically variable characteristics. This means that the polarization properties of the light reflected by the security element differ from the polarization properties of the incident light.
- This effect is similar to the known effect that under a material-specific Brewster angle mainly one of several polarization components of the incident light is reflected.
- a second effect is given by the interference of the reflected light rays caused by the substance with optically variable properties. The interference is dependent on a geometric size, in particular a layer thickness of the substance or constituents, in particular pigments, of the substance.
- the interference depends on orientations of the constituents of the substance with respect to an (idealized flat) surface of the security element or security document.
- the interference depends on the inhomogeneity of the surface of the security element. Since incident light can at least partially penetrate the substance with optically variable properties, the interference is also dependent on layers underlying this substance, for example paper layers, with respect to the irradiation direction.
- the relevant inhomogeneities of a surface of paper may be much greater than a thickness of interference layers and, for example, individual ones
- Pigment particles or particle agglomerates correspond.
- the substance with optically variable properties in or on the security document thus generates a scattering of the incident light.
- scattering effects which are also produced, for example, by inhomogeneity of the surface of the security element and layers lying below the security element, contribute to polarized light scattering.
- Security element reflected light having certain polarization properties, having a predetermined intensity at a certain angle of reflection.
- the above-explained change in the polarization properties may in particular be dependent on the nature of the substance with optically variable properties. Also, the change in the polarization properties may be dependent on the at least one illumination parameter.
- the presence of a substance with optically variable properties as a function of the intensity of the first portion can be verified, for example, if the intensity corresponds to a predetermined intensity or lies within a predetermined intensity interval. For example, the presence may be verified if the intensity of the first portion is greater than a predetermined intensity or less than a predetermined intensity or is within a predetermined intensity interval of a predetermined intensity.
- the predetermined intensity can in this case be determined, for example, in preliminary tests.
- preliminary tests and / or by simulation one or more types of substances with optically variable properties can be illuminated.
- Various test parameters can be set here. For example, different lighting parameters can be set. Alternatively or cumulatively
- an intensity of the first component can be determined for different polarization states of the first component.
- a polarization state can be described, for example, by a polarization angle.
- further adjustable parameters which influence the intensity of the first portion can be set.
- the type of substance, the set test parameters as well as the intensity of the first component detected in dependence on the set test parameters can then be determined e.g. in a memory device, e.g. in the form of a database.
- the inventively determined intensity of the first portion can then with
- the species can also be identified.
- the Art are identified as the type assigned to a stored intensity, if the intensity of the first component determined according to the invention, when tested with certain test parameters, does not deviate or only by a predetermined amount from this stored intensity, which was determined under the same test parameters.
- the verification of the type can be successful, for example, if the type identified according to the invention corresponds to a type to be expected for the tested document. Accordingly, verification of the type may not be successful if the species identified according to the invention does not meet the type expected for the tested document.
- the proposed method advantageously enables a reliable verification of at least one presence of a substance with optically variable properties.
- no excitation of electroluminescent pigments as well as no analysis of a color-tilting effect is necessary.
- the method comprises in particular the following steps:
- an intensity of the first portion of the reflected light is determined, which is reflected at an angle directed reflection.
- the angle of directed reflection corresponds in terms of magnitude to the previously explained angle of incidence, but has a different sign in relation to a common angular convention.
- an intensity of the first portion of the reflected light is determined, which is reflected under at least one further reflection angle, wherein the at least one further reflection angle is different from the angle directed reflection.
- the at least one further reflection angle is therefore selected differently from the angle of reflection.
- the at least one further reflection angle may be smaller or larger in magnitude than the angle of directed reflection.
- the at least one further reflection angle can in this case be the previously explained reflection angle.
- the intensity of the first portion can, as previously explained, be determined by a means for determining the intensity, for example an optical sensor. It is possible that the first proportion at different angles by the same means for Polarization filtering filtered and whose intensity is determined by the same means for detecting an intensity.
- the first portion is filtered at reflection at the angle of directed reflection by a first means for polarization filtering and whose intensity is determined by a first means for detecting an intensity, wherein the first portion at reflection at the at least one further angle through filtered another means for polarization filtering and its intensity by another means for
- Verification of the presence of a substance having optically variable properties occurs if the intensity of the first portion at reflection below the at least one further reflection angle is greater than the intensity of the first portion at reflection at the angle of directed reflection.
- the intensity of the first portion may be determined upon reflection among a plurality of further reflection angles, which are all different from the angle-directed reflection.
- the presence of a substance having optically variable properties can not be verified if the intensity of the first portion in reflection at the angle of directed reflection is greater than the intensity / intensities of the first portion in reflection below the at least one further reflection angle (s) is.
- the presence of a substance having optically variable properties may then be verified if the intensity of the first portion is greater than or less than the intensity of the first portion when reflected at the angle of reflection by at least one of those angle-reflection-different reflection angles or multiple such reflection angles is.
- the proposed method advantageously enables a reliable verification of at least one presence of a substance with optically variable Properties by a simple comparison of at least two intensities.
- the effect is used that the intensity of the reflected light in most materials or material compositions when reflected at the angle of directed reflection has an intensity maximum of the first portion. For example, it was possible to determine in experiments that materials which are used, for example, in a counterfeiting as a substance with optically variable properties, have an intensity maximum of the first component when reflected at the angle of directed reflection.
- the at least one reflection angle in particular the at least one further reflection angle, is selected as a characteristic scattering angle, the characteristic scattering angle being dependent on the at least one illumination parameter and the type of substance to be verified with optically variable properties.
- the effect is utilized that a specific substance having optically variable properties generates the above-explained polarized light scattering such that a maximum of the intensity of the first portion occurs under the substance-specific characteristic scattering angle.
- the at least one further reflection angle can be chosen in accordance with the substance-specific characteristic scattering angle. Is the specific substance actually in the
- Safety element containing, it is ensured with great certainty that the detected intensity of the first portion of reflection under the characteristic scattering angle is greater than the detected intensity at reflection under the angle of directed reflection. However, if the intensity of the first component detected under the characteristic scattering angle is smaller, then it can already be ruled out at this time that the specific substance is present in the security element. In a preferred embodiment, a particular substance having optically variable properties is identified if the intensity of the first portion is at reflection below the characteristic scattering angle and / or corresponds to a predetermined intensity.
- the intensity of the first component may be at reflection at a plurality of reflection angles, for example for a plurality of reflection angles of a predetermined angular interval, and thus an intensity profile over several
- Reflection angle can be determined. From this intensity course can a
- Reflection angle are determined under which the intensity of the first portion is maximum. Depending on this reflection angle of maximum intensity, the type of substance with optically variable properties can then be identified.
- the species may be characteristic to a stored one
- Spill angle assigned type identified if the inventively determined reflection angle during testing with certain test parameters not or only by a predetermined amount of this stored characteristic scattering angle, which was determined under the same test parameters deviates. This can be done for example by means of an appropriately designed evaluation.
- the respective substance-specific characteristic scattering angle can be stored for different test parameters. This information can
- the database explained above may contain, alternatively or cumulatively for different types of substances and, if appropriate, different test parameters, intensities of the first fraction which are below the
- characteristic scattering angle can be determined. This allows advantageously a timely identification of a specific substance with optically variable properties.
- the intensity of the first portion can be normalized to an intensity of the incident light. This advantageously makes it possible to reliably determine the intensity even with varying or fluctuating intensities of the incident light.
- Illuminated illumination parameters and a reflected light from the security element in a first portion with a first polarization are filtered. Then one can
- Determining an intensity of the first portion at reflection below at least the previously explained characteristic scattering angle A verification of a presence and optionally a verification of a specific type of a specific substance with optically variable properties can take place if the intensity of the first portion corresponds to a predetermined intensity. This advantageously allows a reliable intensity-based verification of a
- Presence as well as identification of a specific substance with optically variable properties.
- the light reflected by the security element is divided into the first portion and a further portion having a polarization orthogonal to the first polarization, wherein the verification of the presence of a substance with optically variable properties and / or an identification of a particular type of substance with Optically variable properties in addition depending on an intensity of the further share takes place.
- the intensity of the further portion can also be determined. In particular, this can be done for the light reflected at the angle of reflection and for the light reflected at this angle directed reflection different reflection angle light. In this case, it is possible to verify the presence of a substance having optically variable properties as a function of a difference between the intensity of the first fraction and the intensity of the further fraction. The difference can be
- an identification of a specific type of substance with optically variable properties can additionally take place as a function of an intensity of the further fraction.
- the intensity of the further portion may be characteristic of a particular type of substance with optically variable properties.
- the difference, in particular the ratio, of the intensity of the first portion to the intensity of the further portion may be characteristic of a particular type of substance.
- the characteristic intensity of the further portion can, according to the previous explanations, also be stored in a corresponding database.
- Security document a lighting of the security element with at least one predetermined illumination parameters done. Then a filtering of the
- Security element reflected light in a first portion with a first polarization and in another portion with a polarization orthogonal to the first polarization respectively. Then, a determination of an intensity of the first portion and a determination of an intensity of the further portion can take place. This can be done in particular for light, which under the previously explained characteristic
- Properties may be, for example, if the intensity of the first portion and the intensity of the further portion differ by more than a predetermined amount. For example, the presence can be verified if a ratio of the intensity of the first fraction to the intensity of the further fraction is greater than one
- a particular type of substance having optically variable properties can be identified as a function of the intensity of the first and further portions.
- both the intensity of the first portion and the intensity of the further portion may be characteristic of a particular type of substance.
- the difference, in particular a ratio, of the intensity of the first portion to the intensity of the further portion may be characteristic of the particular type of substance. This may be the case in particular for given test parameters, in particular for the characteristic scattering angle explained above.
- an angle between a polarization direction of the first component and a reflection plane is selected as a characteristic polarization angle, wherein the characteristic polarization angle is at least dependent on the at least one illumination parameter and the type of substance to be verified with optically variable properties.
- the angle between the polarization direction of the first component and the reflection plane is selected such that an intensity of the first component compared to the intensities of the components with the remaining polarization directions is maximum.
- Lighting parameters and different types of substances with optically variable properties are determined in each case the angle between the polarization direction of the first portion and the reflection plane, below which the first portion has the maximum intensity. This can, e.g. stored in the previously discussed database, as a characteristic polarization angle. Also, the angle between the direction of polarization of the first component and the reflection plane can be one of the test parameters already explained above.
- Polarization filtering be arranged such that the reflected light is filtered such that the polarization direction of the first portion and the reflection plane include the characteristic polarization angle.
- the characteristic polarization angle is also substance-specific, this advantageously results in an increase in the reliability of the identification of a specific type of substance with optically variable properties.
- the security element is illuminated with linearly polarized light. This results in an advantageous manner compared to elliptically polarized light, inexpensive measuring device.
- the security element may, as explained above, the substance with optically variable properties as well as an electroluminescent substance, in particular electroluminescent pigments included.
- the substance with optically variable properties can contain or form field displacement elements.
- the Security element with an alternating electric field for exciting the electroluminescent pigments are acted upon. After that, an emitted luminescent light or an emitted luminescent radiation can be detected.
- the method according to the invention can be carried out only if emitted luminescence radiation is detected and / or if properties of the luminescence radiation correspond to predetermined properties.
- the inventive method can be carried out only if the electroluminescent substance has been successfully verified.
- the test according to the invention is carried out only if a presence (of a certain type) of an electroluminescent substance is detected. If the verification of the electroluminescent substance is unsuccessful, the process can be terminated, with the method according to the invention not being carried out for testing.
- the method proposed according to the invention may first be carried out for testing, whereby a further verification of the electroluminescent substance takes place only after successful verification of the substance with the optically variable properties.
- the security element can be acted upon by the alternating electric field for exciting the electroluminescent pigments.
- the emitted luminescent light or the emitted luminescent radiation can be detected.
- Verification of the electroluminescent substance may be e.g. take place if emitted luminescence radiation is detected and / or if properties of the luminescent radiation correspond to predetermined properties. If no successful verification of the substance with the optically variable properties, so no verification of the electroluminescent substance is performed.
- the device comprises at least one light source for illuminating the
- the light source can be adjustable here.
- illumination parameters of the light source can be adjustable.
- illumination parameters of the light source can be adjustable.
- Light source generated light can be adjusted.
- the device comprises, in addition to the light source, further optical elements, for example optical filters, modulators and means for beam guidance, wherein illumination parameters of the light generated by the light source can be adjusted by means of these optical elements.
- illumination parameters of the light generated by the light source can be adjusted by means of these optical elements.
- a polarization state of the incident light can be adjusted by a polarization filter.
- the device comprises at least one means for the polarization filtering of the light reflected by the security element.
- the means for polarization filtering By means of the means for polarization filtering, a first portion of the reflected light can be filtered with a first polarization.
- the means for polarization filtering can be designed and / or arranged, in particular aligned, such that a polarization direction of the first portion corresponds to the characteristic polarization angle explained above.
- the device comprises at least a first means for detecting an intensity of the first portion.
- the device comprises at least one evaluation device, e.g. a trained as a microprocessor evaluation.
- This data and / or signal technology can be connected to the means for detecting an intensity.
- an intensity of the first portion of reflected light which is reflected at a reflection angle, can be determined for at least one reflection angle.
- the evaluation device By means of the evaluation device, a presence of a substance with optically variable properties as a function of the intensity of the first portion can be verified.
- the device advantageously makes it possible to carry out one of the previously explained methods.
- an intensity of the first portion of reflected light can be determined, which is at an angle reflected reflection.
- an intensity of the first portion of reflected light can be determined which is reflected under at least one further reflection angle, this further reflection angle being different from the angle of directed reflection.
- a presence of a substance with optically variable properties can then be verified if the intensity of the first component is greater than the intensity of the first component in the case of reflection under the angle of directed reflection under the at least one further reflection angle.
- the means for polarization filtering as well as the first means for detecting an intensity can be designed and / or arranged such that only under the angle directed reflection of the first portion is filtered and its intensity is detected.
- the first means for detecting an intensity it is also possible to determine an intensity of the first component in the case of reflection under at least one further reflection angle, which differs from the angle of reflection. This can be a
- the device can be a suitable adjusting device for adjusting the arrangement
- the first means for detecting an intensity and / or the means for polarization filtering in particular the position and / or orientation, of the first means for detecting an intensity and / or the means for polarization filtering.
- the intensity of the first component can be determined upon reflection under the at least one further reflection angle.
- the device may also comprise a further means for polarization filtering.
- the further means for detecting an intensity and / or the further means for polarization filtering can in this case be designed and / or arranged such that the first component is filtered exclusively from light which is reflected under the at least one further reflection angle and its intensity is determined.
- the first means for detecting an intensity and / or the at least one further means for detecting an intensity can in this case be spatially fixedly installed. This means that a position and / or orientation of the corresponding means for
- the proposed device allows this advantageously to carry out one of the previously explained methods.
- At least one reception angle of the first means for detecting an intensity can be set. This means that a relative position and / or relative orientation of the first means for detecting the security element can be changed. Thus, for example, a position and / or orientation of the first means for detecting an intensity and / or a position and / or orientation of the security element can be changed.
- the reception angle can be selected such that a desired reflection angle is set.
- the device comprises at least one further means for detecting an intensity of the first portion, wherein a receiving angle of the at least one further means for detecting an intensity is adjustable.
- a relative position and / or relative orientation of the further means for detecting an intensity can be changed to the security element.
- Polarization filtering and / or the other means for polarization filtering can be changed.
- a receiving angle of these means for polarization filtering can be adjusted. This advantageously makes it possible to detect intensities of the first component for a plurality of reception angles and thus reflection angles.
- Polarization filtering from the light reflected by the security element additionally a further portion filterable with a polarization orthogonal to the first polarization.
- the device may comprise a means for detecting an intensity of the further portion.
- Polarization filtering as a polarization beam splitter or as a polarizing filter, in particular as a polarizing film, be formed.
- Fig. 1 is a schematic representation of the operation of a
- FIG. 3 is a schematic representation of a device according to the invention in a second embodiment
- FIG. 4 shows a schematic representation of a device according to the invention in a third embodiment
- 5 is a schematic representation of a device according to the invention in a fourth embodiment
- 6 is a schematic representation of a device according to the invention in a fifth embodiment
- FIG. 7 is a perspective view of a device according to the invention.
- Fig. 8 is a longitudinal section through the device shown in Fig. 7 and
- FIG 9 shows a longitudinal section through a further device according to the invention.
- a device 1 according to the invention is schematically illustrated in a first embodiment.
- the device 1 comprises a light source 2.
- the light source 2 emits light, which is exemplified by a light beam 3, with an angle of incidence ⁇ 0 on a security element 4, which may be part of a security document, not shown.
- the security element 4 contains a substance 5 with optically variable properties, which is designed in particular as an effect pigment.
- electroluminescent pigments 6 are arranged.
- the substance 5 serves as a field displacement element for field concentration in order to stimulate the electroluminescence of the electroluminescent pigments 6.
- the light beam 3 comprises a first portion ELp which has a plane of polarization which extends in the plane of incidence.
- the light beam 3 has a further portion ELs whose polarization plane is oriented perpendicular to the plane of incidence.
- ELp and ELs can also denote arbitrary orthogonal polarization states.
- the light beam 3 in this case has a predetermined wavelength and a predetermined polarization state.
- the device 1 further comprises a polarization beam splitter 10, a first one
- Light sensor 1 1 and a second light sensor 12 are in this case arranged such that light, which is reflected at a predetermined reflection angle cp R and exemplified by a reflected light beam 9, is filtered and received ,
- the reflection angle cp R is as an angle between the normal direction 7, which is perpendicular to the surface 8 of the security element 4 and the non-illustrated
- Security document is oriented, and the reflected light beam 9 defined, wherein the reflected light beam 9 extends in a reflection plane, which is also perpendicular to the surface 8 of the security element 4 and the not shown
- Security document is oriented and in the straight lines which are parallel to the normal direction 7, are arranged.
- the reflected light includes a first portion RLp having a polarization direction that extends in the reflection plane.
- the reflected light also contains a further component RLs with a polarization direction perpendicular to the polarization direction of the first component RLp.
- the polarization beam splitter 10 the first portion RLp and the further portion RLs from the reflected light beam 9 is filtered, wherein an intensity I (see Fig. 2) of the first portion RLp by the first light sensor 1 1 and an intensity I of the further portion RLs is determined by the second light sensor 12.
- Reflection angle cp R is set. For each of these reflection angles cp R , the intensities I of the first component RLp and the further component RLs can then be determined.
- intensities for a predetermined number of, e.g. B. equidistant, reflection angles cp R are detected in an angular interval of 0 ° to 90 °. It may also be possible to determine a maximum intensity I of the first component RLp and the corresponding reflection angle cp R.
- This corresponding reflection angle cp R can also be referred to as a characteristic scattering angle ⁇ 2 (see FIG. 3) which is substance-specific.
- the characteristic scattering angle ⁇ 2 may be dependent on a wavelength of the incident light.
- the characteristic scattering angle ⁇ 2 can also depend on the properties of the
- Security elements 4 in particular of a surface orientation and / or roughness of the security element 4, his.
- the presence of a substance 5 can for example be verified by a position and orientation of the polarization beam splitter 10 and the light sensors 1 1, 12 is set such that the reflected light at an angle ⁇ (see Fig. 3) reflected reflection and whose intensity I is detected.
- the angle of directed reflection ⁇ corresponds in terms of magnitude to the angle of incidence ⁇ 0 , but is oriented in the relation to the normal direction 7 opposite to the angle of incidence ⁇ 0 .
- Light sensors 1 1, 12 are set such that the reflected light is reflected at a further reflection angle cp R , which is different from the angle ⁇ directed reflection. In this case too, intensities I of the different polarized components RLp, RLs of the reflected light can be detected. The presence of the
- Substance 5 can be verified in this case, if the intensity I of the first portion RLp of the reflected light, which is reflected at the angle ⁇ reflection reflection is smaller than the intensity of the first portion RLp of the reflected light, which is below the further reflection angle cp R is reflected.
- Ratio the intensity I of the first portion RLp and the intensity I of the further portion RLs at one or more reflection angles cp R to determine.
- Difference over several reflection angle cp R corresponds to a predetermined course or differs only by a predetermined small amount thereof.
- a position and orientation of the polarization beam splitter 10 and of the light sensors 11, 12, in particular multiply, can be changed until the difference, for example the difference or the ratio, between the intensity I of the first component RLp and the further component RLs is maximum.
- Reflection angle cp R and / or the corresponding polarization angle of the first portion which can be adjusted by changing the orientation of the polarization beam splitter 10 may be substance-specific, so characteristic of a particular type of substance 5. Depending on the corresponding scattering angle cp R and / or Corresponding polarization angle of the first portion RLp thus the presence and a kind of a specific substance 5 can thus be determined.
- FIG. 2 shows by way of example an intensity profile of an intensity I of the first component RLp and of the further component RLs (see FIG. 1) for three different types of substances 5a, 5b, 5c for different reflection angles cp R.
- the intensity profiles of the intensity I of the first component RLp each have a global maximum in an angular range of 10 ° to 90 °.
- a first substance 5a occurs Maximum at a reflection angle cp R of 60 °.
- the maximum occurs at a reflection angle cp R 50 °.
- the maximum occurs at a reflection angle cp R of 65 °.
- the aforementioned angles of maximum intensity I correspond to characteristic scattering angles ⁇ 2 (see FIG. 3) of the various substances 5 a, 5 b, 5 c and are thus substance-specific.
- Intensity curves of the further portion RLs (see FIG. 1) of the various substances 5a, 5b, 5c are shown by dashed lines over different reflection angles cp R. These are approximately constant for different reflection angles cp R and have no or only a difficult to identify global maximum. However, it can be seen hereby that a difference between intensities I of the first components R Lp and the intensities I of the further components R Ls of the substances 5 a, 5 b, 5 c is also maximal for the corresponding characteristic scattering angle ⁇ 2 .
- FIG. 3 another embodiment of a proposed device 1 is shown schematically. This corresponds, unless otherwise explained, the device 1 shown in Fig. 1.
- the device 1 shown in FIG. 3 comprises a polarizing filter 13, through which a desired polarization filter 13 is provided
- Polarization state of the incident light beam 3 is set.
- the device comprises a wave plate 14, e.g. can be formed as ⁇ / 4-plate.
- the device 1 comprises a beam splitter 15, which filters out a predetermined portion 17 of the incident light beam 3 from the incident light beam 3.
- the predetermined proportion 17 may be, for example, 5%.
- the predetermined portion 17 is detected by a light sensor 16, which may be formed for example as a photodiode, and determines its intensity. This allows a standardization of
- Light beams 9a, 9b to an intensity of the incident light beam 3.
- a verification regardless of different intensities, in particular also be carried out independently of intensity fluctuations of the incident light beam.
- the incident light beam 3 in this case has a predetermined wavelength, a predetermined polarization state and a predetermined angle of incidence ⁇ 0 .
- the device 1 comprises a first polarization beam splitter 10a and a further polarization beam splitter 10b.
- the device comprises a first light sensor 1 1 a, a second light sensor 12 a, a third light sensor 1 1 b and a fourth light sensor 12 b.
- the first polarization beam splitter 10a and the first and the second light sensor 11a, 12a are arranged and configured in the device 1 in such a way that a first reflected light beam 9a, which is reflected by the security element 4 at an angle , ⁇ , is filtered and the intensities are filtered a first portion RLp and a further portion RLs of this first reflected light beam 9a are detected.
- the first reflected light beam 9a which is reflected by the security element 4 at an angle , ⁇ , is filtered and the intensities are filtered a first portion RLp and a further portion RLs of this first reflected light beam 9a are detected.
- Polarization beam splitter 10a is here corresponding to that shown in Fig. 1
- Polarization beam splitter 10 is formed.
- the first light sensor 11a detects the intensity of the first component RLp of the first reflected light beam 9a and the second light sensor 12a detects the intensity I of the further component RLs of the first reflected light beam 9a.
- Light sensor 12b are in this case arranged and formed in the apparatus 1 such that a further reflected light beam 9b, which is reflected at a characteristic scattering angle ⁇ 2 of a substance 5 to be verified (see FIG. 1), is filtered and the
- Intensities I of the first portion RLp and the further portion RLs are detected.
- the intensity of the first portion RLp of the further reflected light beam 9b is detected by the third light sensor 11b and the intensity I of the further portion RLs of the further reflected light beam 9b is detected by the fourth light sensor 12b.
- the device 1 shown in FIG. 3 serves in particular for the verification of a specific type of substance 5 (see FIG. 1). Accordingly corresponds to
- Reflection angle cp R (see Fig. 1) of the further reflected light beam 9b the characteristic scattering angle ⁇ 2 , which is specific to the type of substance 5 to be verified.
- FIG. 4 shows a device 1 according to the invention in a further embodiment.
- the device shown in FIG. 4 a first segmented light sensor 18 and a further segmented light sensor 19.
- the first segmented light sensor 18 has a first detection segment 18a and a further detection segment 18b.
- the further segmented light sensor 19 has a first one
- Detection segment 19a and another detection segment 19b Various polarization filters 20a, 20b, 21a, 21b are arranged in front of the detection segments 18a, 19b in the beam direction of reflected light beams 9a, 9b such that the first segment 18a of the first segmented light sensor 18 has an intensity I of a first portion RLp of a first reflected light beam 9a detected, wherein the first reflected light beam 9a is reflected at the angle ⁇ directed reflection.
- the first polarization filter 20a filters out the first component RLp from the first reflected light beam 9a.
- the further polarization filter 20b filters out a further portion RLs from the first reflected light beam 9a, wherein its intensity I is detected by the further detection segment 18b of the first segmented light sensor 18.
- a first portion RLp of a further reflected light beam 9b is filtered by a further polarization filter 21a, wherein the intensity I of this first portion RLp is detected by the first detection segment 19a of the further segmented light sensor 19.
- the intensity I of a further portion RLs of the further reflected light beam 9b is detected by the further detection segment 19b of the further segmented light sensor 19, wherein the further portion RLs by the further polarization filter 21 b from the further reflected light beam 9b
- the further reflected light beam 9b is in this case under one for a particular type of substance 5 (see FIG. 1) of the security element 4
- FIG. 5 shows a device 1 according to the invention in a further embodiment.
- the device 1 instead of light sensors 1 1 a, 1 1 b, 12 a, 12 b, 18, 19, the device 1 comprises a flat light sensor arrangement 22, which is designed as a CCD sensor and comprises a plurality of light sensors.
- polarization filters which are arranged in the beam direction of reflected light beams 9a, 9b in front of the light sensor array 22 that individual light sensors of the light sensor array 22 intensities I different parts RLp, RLs of the reflected light beams 9a, 9b detect.
- a reflection angle cp R of the reflected light beam 9a, 9b whose respective intensity I is determined may be determined depending on a position of the corresponding light sensors in the light sensor array 22.
- FIG. 5 shows that light sensors (not shown) of the light sensor arrangement 22 detect intensities I of components R Lp, R Ls of a first reflected light beam 9 a, which is reflected by the security element 4 at the angle ⁇ 1. Accordingly, further light sensors detect intensities I of fractions RLp, RLs of a further reflected light beam 9b which is reflected by the security element 4 at a characteristic scattering angle ⁇ 2 , the characteristic scattering angle ⁇ 2 being substance-specific for a specific type of substance 5 (see FIG. 1). is.
- FIG. 6 shows a further embodiment of a device 1 according to the invention.
- the device 1 shown in FIG. 6 comprises a third segmented light sensor 23.
- This segmented light sensor 23 has a first detection segment 23a and a further detection segment 23b.
- Polarizing filters 24a, 24b are arranged in the beam direction of a third reflected light beam 9c in front of the detection segments 23a, 23b such that an intensity I of a first component RLp is reflected by the first detection segment 23a and an intensity I of a further component RLs of the third by the further detection segment 23b Beam 9c is detectable.
- the third segmented light sensor 23 can serve to detect intensities I of portions R Lp, R Ls of a light beam 9 c reflected at a further angle ⁇ 3 , whereby a reliability of the verification can be increased.
- FIG. 6 also shows that the light source 2 irradiates a first light beam 3a with a first wavelength and a second light beam 3b with a wavelength different from the first wavelength onto the security element 4.
- characteristic scattering angle ⁇ 2 can be wavelength-dependent, z. B.
- the reflection angle ⁇ 2 shown in Fig. 6 represent the substance-specific characteristic scattering angle in the case of irradiation of light having the first wavelength, wherein the Further reflection angle ⁇ 3 represents a substance-specific characteristic scattering angle in the case of an irradiation of light with the further wavelength.
- the device 1 shown in Fig. 6 thus enables the illumination of the
- Security elements with two mutually different wavelengths wherein the detection of intensities I of shares RLp, RLs of reflected light beams 9b, 9c are made possible, which represent under illumination with the corresponding wavelength respectively characteristic scattering angles. This advantageously allows a further increase in the reliability of a test of the security element 4.
- the light source 2 may irradiate a first light beam 3a having a first polarization and a second light beam 3b having a polarization different from the first polarization on the security element 4.
- the polarization states of the incident light beam 3 can be modulated or changed with a time offset. In this case, the measurement data evaluation, ie the evaluation of the intensities I of the portions of the / reflected
- Light beam / light beams 9a, 9b, 9c, are synchronized with change of the polarization state of the incident light beam 3.
- FIG. 7 shows a perspective view of a device 1 according to the invention.
- the device 1 comprises a housing 25.
- the housing 25 are in the housing 25.
- Security element 4 is arranged and has an internal volume 27 (see FIG. 8), which is open towards the security element 4.
- the passage openings 26a, 26b, 26c connect the inner volume 27 with an outer volume 28.
- a light source 2 is arranged, the z. B. emitted in Fig. 1 light beam 3 emitted.
- Polarizing filter 13 and a wave plate 14 are arranged.
- a first segmented light sensor 18 is arranged in a second passage opening 26b. This includes, as already described in the explanation of FIG. 4, a first detection segment 18 a and another detection segment 18 b, the
- polarization filters 20a, 20b Arranged in the beam direction of a first reflected light beam 9a (see FIG. 4) in front of the detection segments 18a, 18b are polarization filters 20a, 20b which enable the detection of intensities I of different components RLp, RLs described with reference to FIG.
- a further segmented light sensor 19 is arranged, which is formed according to the explanations made to FIG. 4.
- the passage openings 26a, 26b, 26c are in this case arranged in the housing 1 such that a first reflected light beam 9a is received by the first segmented light sensor 18, the reflection directed from the angle ⁇ Security element 4 is reflected. Accordingly, by the further segmented light sensor 19 arranged in the third passage opening 26c, a further reflected light beam 9b is received, which is reflected by the security element 4 under the characteristic scattering angle ⁇ 2 .
- the first through hole 26a is here arranged and oriented so that light having a predetermined incident angle ⁇ is 0 irradiated to the security element. 4
- FIG. 8 shows a longitudinal section through the device 1 shown in FIG. 7.
- the inner volume 27 is shown, which is penetrated by both the incident light 3, and the reflected light 9a, 9b.
- FIG. 9 shows a longitudinal section through a further device 1 according to the invention.
- the inner volume 27 is shown, which is penetrated by both the incident light 3, and the reflected light 9a, 9b.
- a light source 2 is connected via a polarization-maintaining light guide 29 to a light extraction device 30 arranged in or on the first passage opening 26 a, the light being directed to the light source Generation of the light beam 3 is passed through the light guide 29 to Lichtauskopplungseinnchtung 30 and is coupled there out of the light guide 29 as a light beam 3.
- the light beams 9a, 9b reflected by the through-holes 26b, 26c are illuminated by light-emitting devices 31, 32 respectively in or on these
- openings 26b, 26c are arranged, coupled into further polarization-maintaining optical fibers 33, 34.
- the reflected light is passed through the further optical fibers 33, 34 to a light sensor arrangement 22 and via further
- Light outcoupling device 35, 36 from the other optical fibers 33, 34 coupled. It is shown that by the light extraction means 35, 36
- light for illuminating the security element 4 is guided at least partially via a light guide 29 from a light source 2 to the security element 4.
- light reflected by the security element can be conducted at least partially via a further optical waveguide 33, 34 from the security element 4 to a light sensor.
- the illustrated device 1 advantageously allows a free
- the light guides 29, 33, 34 may be designed, for example, as optical fibers or glass fibers. LIST OF REFERENCE NUMBERS
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Abstract
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DE201310216308 DE102013216308A1 (de) | 2013-08-16 | 2013-08-16 | Verfahren und Vorrichtung zur Prüfung eines Sicherheitselements eines Sicherheitsdokuments |
PCT/EP2014/067402 WO2015022394A1 (de) | 2013-08-16 | 2014-08-14 | Verfahren und vorrichtung zur prüfung eines sicherheitselements eines sicherheitsdokuments |
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EP3033739A1 true EP3033739A1 (de) | 2016-06-22 |
EP3033739B1 EP3033739B1 (de) | 2019-10-09 |
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EP14755998.3A Active EP3033739B1 (de) | 2013-08-16 | 2014-08-14 | Verfahren und vorrichtung zur prüfung eines sicherheitselements eines sicherheitsdokuments |
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US (1) | US10109130B2 (de) |
EP (1) | EP3033739B1 (de) |
JP (1) | JP6482556B2 (de) |
CN (1) | CN105453145B (de) |
DE (1) | DE102013216308A1 (de) |
WO (1) | WO2015022394A1 (de) |
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JP2020017076A (ja) * | 2018-07-25 | 2020-01-30 | グローリー株式会社 | 紙葉類処理装置および紙葉類処理方法 |
DE102018122497A1 (de) * | 2018-09-14 | 2020-03-19 | Bundesdruckerei Gmbh | Dokumentenleser zum optischen Erfassen eines Identifikationsdokumentes |
BR112021016866A2 (pt) * | 2019-02-28 | 2021-11-03 | Sicpa Holding Sa | Método para autenticar uma marca magneticamente induzida com um dispositivo portátil |
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CH653459A5 (de) * | 1981-04-16 | 1985-12-31 | Landis & Gyr Ag | Dokument mit einem sicherheitsfaden und verfahren zur echtheitspruefung desselben. |
US4526466A (en) * | 1983-09-01 | 1985-07-02 | Rca Corporation | Technique for verifying genuineness of authenticating device |
JPS62276685A (ja) * | 1986-05-26 | 1987-12-01 | 日本金銭機械株式会社 | 光学式紙幣鑑別装置 |
CN1153099C (zh) | 1998-08-27 | 2004-06-09 | 日石三菱株式会社 | 真正性识别系统及真正性识别薄膜的使用方法 |
US6473165B1 (en) | 2000-01-21 | 2002-10-29 | Flex Products, Inc. | Automated verification systems and methods for use with optical interference devices |
JP2001307172A (ja) * | 2000-04-21 | 2001-11-02 | Topcon Corp | カード真偽判定装置 |
GB0025096D0 (en) | 2000-10-13 | 2000-11-29 | Bank Of England | Detection of printing and coating media |
US20030042438A1 (en) | 2001-08-31 | 2003-03-06 | Lawandy Nabil M. | Methods and apparatus for sensing degree of soiling of currency, and the presence of foreign material |
DE10234431A1 (de) * | 2002-07-29 | 2004-02-12 | Giesecke & Devrient Gmbh | Vorrichtung und Verfahren zur Bearbeitung von Wertdokumenten |
JP4062200B2 (ja) * | 2003-08-19 | 2008-03-19 | 富士電機リテイルシステムズ株式会社 | 紙葉類の鑑別装置および鑑別方法 |
DE102004025373A1 (de) | 2004-05-24 | 2005-12-15 | Merck Patent Gmbh | Maschinenlesbares Sicherheitselement für Sicherheitserzeugnisse |
ITPC20050045A1 (it) * | 2005-08-04 | 2007-02-05 | Numerouno Ricerche Srl | Metodo e dispositivo per la rilevazione di documenti e banconote false |
JP2007276444A (ja) | 2006-03-17 | 2007-10-25 | Ricoh Co Ltd | 識別装置および識別媒体 |
DE102007063415B4 (de) * | 2007-12-18 | 2014-12-04 | BAM Bundesanstalt für Materialforschung und -prüfung | Verfahren und Vorrichtung zum Erkennen eines Erzeugnisses |
WO2010071956A1 (en) | 2008-12-22 | 2010-07-01 | Canadian Bank Note Company, Limited | Improved printing of tactile marks for the visually impaired |
DE102009012299A1 (de) | 2009-03-11 | 2010-09-16 | Giesecke & Devrient Gmbh | Sicherheitselement |
DE102009017708B3 (de) | 2009-04-14 | 2010-11-04 | Bundesdruckerei Gmbh | Verifikationsvorrichtung und Verfahren zum Verifizieren beugender und/oder reflektierender Sicherheitsmerkmale von Sicherheitsdokumenten |
MY161574A (en) | 2010-06-29 | 2017-04-28 | Sicpa Holding Sa | Method and device for measuring optical properties of an optically variable marking applied to an object |
-
2013
- 2013-08-16 DE DE201310216308 patent/DE102013216308A1/de active Pending
-
2014
- 2014-08-14 CN CN201480045242.0A patent/CN105453145B/zh active Active
- 2014-08-14 WO PCT/EP2014/067402 patent/WO2015022394A1/de active Application Filing
- 2014-08-14 US US14/912,144 patent/US10109130B2/en active Active
- 2014-08-14 JP JP2016533922A patent/JP6482556B2/ja active Active
- 2014-08-14 EP EP14755998.3A patent/EP3033739B1/de active Active
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Publication number | Publication date |
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JP6482556B2 (ja) | 2019-03-13 |
US20160203665A1 (en) | 2016-07-14 |
WO2015022394A1 (de) | 2015-02-19 |
CN105453145A (zh) | 2016-03-30 |
EP3033739B1 (de) | 2019-10-09 |
DE102013216308A1 (de) | 2015-02-19 |
CN105453145B (zh) | 2019-03-29 |
US10109130B2 (en) | 2018-10-23 |
JP2016528501A (ja) | 2016-09-15 |
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