WO2016079174A1 - Procédé et dispositif de détection de lumière rayonnée ainsi que procédé de production - Google Patents

Procédé et dispositif de détection de lumière rayonnée ainsi que procédé de production Download PDF

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Publication number
WO2016079174A1
WO2016079174A1 PCT/EP2015/076950 EP2015076950W WO2016079174A1 WO 2016079174 A1 WO2016079174 A1 WO 2016079174A1 EP 2015076950 W EP2015076950 W EP 2015076950W WO 2016079174 A1 WO2016079174 A1 WO 2016079174A1
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WO
WIPO (PCT)
Prior art keywords
light
channel
outlet opening
light channel
inlet opening
Prior art date
Application number
PCT/EP2015/076950
Other languages
German (de)
English (en)
Inventor
Lazar KULIKOVSKY
Manfred Paeschke
Olga Kulikovska
Markus Tietke
Original Assignee
Bundesdruckerei Gmbh
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
Application filed by Bundesdruckerei Gmbh filed Critical Bundesdruckerei Gmbh
Priority to EP15800747.6A priority Critical patent/EP3221853B1/fr
Publication of WO2016079174A1 publication Critical patent/WO2016079174A1/fr

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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
    • G07D7/06—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

Definitions

  • the invention relates to a device and a method for detecting light which is emitted by a security document, and to a method for producing such a device.
  • Optical systems which are used for detecting the radiated light regularly consist of a plurality of lenses which image the surface or a subregion of the surface of the security document into a detector plane of an optical sensor.
  • the light intensity that is the amount of light per detector surface
  • the measuring distance e.g. a distance between an entrance surface of the optical
  • the aperture designates a diameter of an inlet opening of the optical system, in particular the diameter of an entrance lens.
  • the entrance surface may be equal to the detector surface, in particular when light from the surface directly, so without radiating through further optical element, strikes the detector.
  • each lens of the optical system causes low reflections and thus light losses.
  • Another disadvantage is the high construction costs and the high space requirement of these optical systems with lenses.
  • the technical problem is to provide a device and a method for detecting emitted light of a security document and a method for producing such a device, which allow detection of a desired amount of light, but at the same time a space requirement, weight, construction costs and light losses and positioning sensitivity reduce.
  • a light channel with a free body shape can be provided, wherein the free body shape is selected such that a surface of the security document to be imaged having a predetermined geometry is imaged by the light channel of the device onto an optical sensor, in particular on its active surface, with a predetermined geometry.
  • the light emitted, reflected or scattered from the surface to be imaged can be directed completely or in large part through the light channel onto the active surface.
  • Proposed is a device for detecting emitted light of a security document.
  • the light from the security document is a device for detecting emitted light of a security document.
  • the emitted light may denote diffused light, reflected light, transmitted light or emitted light.
  • a security document can be any document that has a
  • 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 be referred to as security features.
  • a security document may include multiple security features and / or security elements. As defined herein, a security document can always be a security element. Examples of security documents, which also include value documents representing a value, include, for example, passports, identity cards, driving licenses, identity cards, access control cards, health insurance cards, banknotes, postage stamps, bank cards, credit cards,
  • the security document can in this case in particular light-scattering
  • Electroluminescent radiation when such luminance-sensitive element e.g. by light and / or an electric field is excited.
  • the device may in particular be part of a device for checking the authenticity of the security document.
  • a device for checking the authenticity of the security document Such a device enables a verification of the authenticity of the security document, in particular by an evaluation of
  • the device comprises at least one light guide body.
  • the light-guiding body may be formed as a coated glass body or comprise such.
  • the light guide body can be made as a solid profile with at least one, e.g. be formed with air or another transparent material filled, Lichtleitkanal.
  • the light guide body has at least one light channel or forms such.
  • the light channel has an inlet opening and at least one first outlet opening.
  • the inlet opening and the first outlet opening are thus connected by the light channel.
  • the inlet opening here denotes an opening through which the light emitted by the security document enters the light channel.
  • the outlet opening accordingly designates an opening through which the light which has entered and is radiated through the light channel can exit or exit the light channel.
  • the light channel enclosing wall surface or enclosing wall surfaces are formed completely reflective. This means that no light can escape from the light channel through the wall surface (s).
  • the wall surface (s) can be designed to be mirror-like.
  • the light guide body is formed lens-free. This means that the light guide body does not comprise a lens or an optically equivalent element.
  • the light guide body does not comprise a lens or optically equivalent element which serves for optical imaging and / or light bundling.
  • the feature that the light guide is formed lens-free mean that the light channel is formed such that a direction of the through
  • Inlet opening in the light channel entering light is changed exclusively by reflection on the wall surfaces.
  • the feature that the light guide body is formed lens-free mean that a refraction
  • Beam focusing and / or beam scattering of the light entering through the inlet opening in the light channel is carried out exclusively by reflection on the wall surfaces. It can therefore no optical element for changing the beam direction of the light, the
  • Refraction be arranged for beam focusing and / or beam scattering in and / or along the light channel.
  • the light guide body is formed lens-free, but does not necessarily exclude that one or more optical elements, e.g. Mirror or beam splitter to be covered by the light guide body. However, such optical elements do not serve for light bundling and / or optical imaging.
  • the inlet opening and / or the first outlet opening can / can be formed lens-free. This means that at the inlet and / or the
  • the light channel can be in direct optical communication with an environment via the inlet opening. This can mean that light is changed without change
  • the light channel via the outlet opening can be in direct optical connection with an environment or with an optical sensor explained in more detail below. This may mean that light can radiate out of the light channel into the environment or onto the optical sensor without changing properties.
  • the light guide body can be formed without imaging elements, the light guide body not comprising an element for optical imaging.
  • this does not rule out that a beam guide for detecting light is performed by the light guide body.
  • Security document emitted light and through the light channel, for. can be passed to an optical sensor. Subsequently, properties of the light detected by the optical sensor can be determined and evaluated. In order to determine these properties, no optical imaging of the surface or a subarea thereof is required. In particular, optical imaging is not required if only the amount or intensity of the light emitted from areas of the surface of the security document is to be detected.
  • the proposed device advantageously enables loss-free detection of the radiated light, wherein construction costs and a space requirement due to the unnecessary lenses are minimized.
  • the light channel is designed as a free-form body.
  • a design of the free-form body, in particular the formation of the inlet and outlet opening, depending on a geometry and position of a radiating surface (surface to be imaged) and in dependence on a geometry of an active surface of an optical sensor can be selected.
  • the inlet opening can be at any geometry and / or position of the radiating Surface and the exit opening are adapted to the geometry of the active surface of a sensor.
  • an inlet opening may be rectangular and an outlet opening may be circular or vice versa.
  • the light channel in particular the geometric shape of the free-form body and the geometry of the inlet and outlet opening, can be chosen such that a surface of the security document to be imaged with a predetermined geometry through the light channel of the device to an optical sensor, in particular on its active surface, is imaged with a predetermined geometry.
  • the area to be imaged can be rectangular, square, circular or oval.
  • the active surface may in particular be rectangular or square. Again, other geometric shapes are conceivable.
  • the light channel thus formed can radiate the light emitted from the surface to be imaged, e.g. emitted, reflected or scattered light or a predetermined percentage, e.g. more than 90% or more than 95% of which are directed by the light channel to the active surface.
  • the shape of the light channel can thus be selected depending on the geometry of the surface to be imaged and the active surface of the desired optical sensor. As a result, a reliable optical detection of a surface to be imaged with a predetermined geometry and with a desired optical sensor can advantageously take place. If an optical sensor with a predetermined geometry is to be used, the shape of the light channel can advantageously provide good optical detection for various surfaces to be imaged. Thus, a flexible adaptation of the optical detection can take place.
  • a freeform body may in particular have an asymmetrical shape or an irregular contour.
  • the device comprises at least one optical sensor, wherein the optical sensor is arranged in or at the first outlet opening.
  • the optical sensor can in this case comprise or have an active surface, wherein the optical sensor can generate an output signal as a function of the light radiating or incident on this active surface.
  • the arrangement of the optical sensor at or in the first exit opening may mean that the light directed through the light channel towards the first exit opening and / or the exit light from the first exit opening is completely or at least a predetermined proportion, e.g. at least 90%, on the active surface radiates or falls.
  • the active surface may in this case have a predetermined geometry and / or predetermined dimensions.
  • a geometry of the outlet opening and / or dimensions of the outlet opening may correspond to the geometry or dimension of the active area.
  • the active surface may be arranged at the outlet opening also within the light channel. This can e.g. mean that the light channel encloses the active surface of the optical sensor at its outlet opening.
  • the light channel encloses the active surface of the optical sensor at its outlet opening.
  • Wall surface of the light channel and the active surface no or a predetermined
  • the wall surface of the light channel can be arranged at the first outlet opening flush with edges of the active surface.
  • the light channel can be in direct optical communication with the active surface of the optical sensor via the exit opening. In this case, it may be possible that no light exits the first outlet opening into an environment.
  • the optical sensor in particular its active surface, can also be arranged outside the first outlet opening.
  • the light channel has at least one branching into a first sub-channel with the first outlet opening and at least one further sub-channel with a further outlet opening.
  • the light channel may comprise a main channel section between the inlet opening and the branch.
  • the light channel may comprise a first part-channel section between the branch and the first outlet opening.
  • the light channel may comprise a further partial channel section between the branch and the further outlet opening.
  • the light channel in particular at least one of the sub-channels or the main channel section, have a further branch.
  • the device comprises a beam splitter which splits light, in particular from the main channel section, in a predetermined ratio onto the first sub-channel and the at least one further sub-channel, e.g. redirects or radiates into them.
  • the beam splitter may be located at / in front of the branch.
  • the beam splitter can direct light from a main channel section of the light channel in a predetermined ratio into the first sub-channel and into the at least one further sub-channel.
  • the predetermined ratio may be a light amount ratio or
  • the ratio may vary depending on the light characteristics to be detected and / or the sensitivity of optical sensors to the
  • the predetermined ratio may be 1: 1.
  • the predetermined ratio may be 1: 1.
  • the beam splitter denotes an optical element, by means of which a beam direction of at least part of the light radiated onto the beam splitter is changed.
  • a beam direction of a first portion of this light can not be changed by the beam splitter, wherein a beam direction of the remaining portion is changed by the beam splitter.
  • the branching is designed such that the light at the branch, in particular the light from the main channel section, is split in a predetermined ratio onto the first and the at least one further sub-channel.
  • the branch may be formed such that the light from a main portion of the light channel radiates in a predetermined ratio in the first sub-channel and in the at least one further sub-channel.
  • the predetermined ratio may in turn denote a light quantity or light intensity ratio.
  • the ratio is 1: 1.
  • the branching can be achieved by a suitable design and / or a suitable geometric course of the branching.
  • Wall surface / s be provided.
  • the device comprises at least one further optical sensor, wherein the at least one further optical sensor is arranged in or at the first outlet opening or in or at the at least one further outlet opening.
  • the first and the further optical sensor can be arranged in or at the first outlet opening.
  • the two optical sensors can be used to detect and optionally determine mutually different properties of the light.
  • the first and the further optical sensor may be arranged spatially adjacent to one another in or at the first outlet opening.
  • the arrangement of the optical sensors on or in the first outlet opening may mean that the light conducted through the light channel towards the first outlet opening and / or the light emerging from the first outlet opening is completely or at least at a predetermined proportion, eg at least 90% the entirety of the active surfaces radiates or falls.
  • the active surfaces can be arranged inside or outside the light channel. Preferably, no or only a predetermined (small) distance between edges of the active surfaces of the two sensors may be present.
  • the active surfaces may be arranged such that the light directed towards the first outlet opening radiates in a predetermined ratio, in particular in equal or unequal parts, to the active surfaces.
  • the light channel encloses the active surfaces of the optical sensors at its first outlet opening. In this case, no or a predetermined (small) distance may be present between the wall surface of the light channel and the active surfaces. If there is no distance, then the wall surface of the light channel can be arranged flush with the active surfaces at the first outlet opening. Thus, the light channel may be in direct optical communication with the active surfaces of the optical sensors via the exit aperture.
  • the further optical sensor is arranged spatially separated from the first optical sensor. This advantageously reduces mutual interference of the optical sensors by the disadvantageous
  • Output signal of the sensors can be falsified.
  • the further optical sensor can be arranged on or in the further outlet opening such that the light guided through the light channel to the further outlet opening and / or that from the further outlet opening
  • the further optical sensor can in this case within or au ßercher the other
  • Subchannel be arranged. Furthermore, a geometry and / or dimension of the further outlet opening can be adapted to the geometry and / or dimension of the active surface of the further optical sensor. Reference is made to the corresponding previous statements.
  • the first optical sensor is a spectral sensor and the at least one further sensor is a light quantity sensor.
  • a cross section of the light channel decreases from the inlet opening towards the at least one outlet opening.
  • the cross section may in this case designate a cross-sectional area or a, in particular maximum, diameter of the light channel.
  • the cross section of the light channel increases from the inlet opening towards the at least one outlet opening.
  • the light channel has sections with a constant cross section.
  • a size of the cross section may, for example, be detected along a central axis of the light channel.
  • the cross-section may be e.g. non-permanent, especially sudden, continuous or differentiable change.
  • a cross section of the inlet opening may be larger or smaller than a cross section of the at least one outlet opening. This advantageously results in a desired concentration or a desired distribution of the light irradiated into the light channel.
  • At least a portion of the light channel in particular the entire light channel, frusto-conical or truncated pyramid shaped.
  • at least one subsection of the at least one subchannel, in particular the entire subchannel may be frusto-conical or truncated pyramidal. This does not exclude that at least one further subsection of the light channel and / or the at least one subchannel is cylindrical or cuboidal. This results in an advantageous manner as simple as possible mechanical production of the light guide body.
  • the light channel is designed such that a back reflection-free propagation of the light from the inlet opening to the at least one outlet opening takes place.
  • a direction of the light introduced through the inlet opening in the light channel is only changed in such a way that the beam direction in each section of the light channel comprises a portion which is oriented parallel to a center line or central axis of the light channel and in the direction of the outlet opening, is oriented in particular from the inlet opening to the outlet opening.
  • the beam direction has a further portion transverse to this center line or central axis. However, it is essential that the beam direction has no or an only negligible proportion in a direction which is oriented parallel to the center line or central axis and in the direction of the inlet opening.
  • the light channel is formed such that an intensity of the in the
  • Propagation of the light from the inlet to the at least one outlet opening back-reflected radiation is less than a predetermined threshold.
  • the intensity of the back-reflected radiation may be less than or equal to 10% of the intensity of the light irradiated through the inlet opening.
  • a wall surface inclination and / or a length of the light channel and / or at least one subchannel is / are selected such that the back reflection-free propagation is ensured as a function of a dimension of the inlet opening and a dimension of the outlet opening.
  • the outlet opening designates the inlet opening of the respective channel section, that is to say, for example, of the previously explained main channel section or
  • the dimension of the inlet opening in dependence on a dimension of the surface to be detected of the security document and / or a desired or necessary distance of the inlet opening of this surface and a desired angle of incidence of the radiated from the surface to be detected light on the Entry opening to be determined.
  • the angle of incidence may in this case be an angle relative to a line which is oriented perpendicular to the inlet opening, in particular an angle relative to an optical axis of the inlet opening.
  • the dimension of the outlet opening may be dependent on the dimension of the active surface of the optical sensor.
  • the dimension of the outlet opening may be dependent on the dimension of the active surface of the optical sensor.
  • Outlet opening correspond to the dimension of the active area or to a
  • predetermined (small) dimension greater than the dimension of the active surface.
  • the wall surface slope may be given relative to a central axis or centerline of the light channel. If the (sub) channel has a curvature or a kink, the wall surface inclination can be given relative to a tangent to the central axis or center line. However, it is also possible that in this case the
  • Wall surface inclination is given relative to the optical axis of the inlet opening of the light channel or an inlet opening of a sub-channel.
  • the center line of the inlet opening in this case denotes a perpendicular to an inlet surface oriented line, which
  • Inlet surface intersects in the geometric center.
  • the wall surface slope may vary along the light channel, especially within a predetermined pitch interval. This may mean that the
  • Wall surface inclination along the light channel and / or the at least one sub-channel is greater than or equal to a predetermined minimum inclination and / or less than or equal to a maximum inclination.
  • the wall surface inclination may change non-steadily along the light channel, in particular in a sudden, continuous or preferably differentiable manner.
  • the inclination may be given by an angle between the central axis and a line of intersection through the wall surface, the section line lying in a sectional plane spanned from the central axis and a vector perpendicular to the central axis or center line with the vector oriented from the central axis or midline towards the wall surface.
  • the angle may be defined by the angle between the central axis and a tangent to the cutting line in the
  • the beam direction of the light irradiated into the light channel in particular in a multiple reflection, so change that along the light channel of the oriented parallel to the center line or central axis of the light channel and in the direction of the outlet opening portion decreases.
  • the wall surface inclination and the length of the light channel can in particular be selected such that this proportion is greater than zero along the light channel in each section.
  • the wall surface inclination changes along the light channel and / or along at least one subchannel. This advantageously results in a further minimization of light losses.
  • the light channel is formed by a translucent material.
  • the propagation of the light in the light channel takes place here within the body.
  • the light channel can be formed by a glass or plastic body.
  • the glass or plastic body may be coated, wherein by the coating completely reflecting wall surfaces of the glass or
  • Plastic body are provided. Alternatively, there is air in the light channel.
  • At least one light guide body is provided, wherein at least one light channel is provided in the light guide body.
  • the light channel has an inlet opening and at least one
  • Outlet opening wherein the light channel encompassing / n wall surface / n is formed completely reflecting / are.
  • the light guide body is formed lens-free.
  • the method can thus comprise all the method steps which are necessary for producing a device according to one of the previously explained embodiments.
  • a method for detecting emitted light, in particular an amount of intensity, of a security document wherein a device according to one of the above-explained embodiments is arranged relative to a surface of the security document such that light emitted from at least a portion of the surface passes through the Inlet opening enters the light channel.
  • FIG. 1 shows a schematic cross section through a device according to the invention
  • Fig. 3 is a schematic longitudinal section through a light channel in another
  • FIG. 4 shows a schematic cross section through a device according to the invention in a further embodiment
  • Fig. 5 is a perspective view of a device according to the invention in a further embodiment
  • FIG. 6 shows a schematic cross section through a device according to the invention in a further embodiment.
  • Fig. 1 is a schematic cross section through a device 1 for detecting radiated light 2, which is exemplified by arrows, one
  • the device 1 comprises a light guide 4 and an optical sensor 5, which may be formed, for example, as a photodetector, in particular as a CCD sensor or CMOS sensor.
  • the light guide 4 has a light channel 6.
  • the light channel 6 has an inlet opening 7 and an outlet opening 8 on.
  • the radiated light 2 enters through the inlet opening 7 into the light channel 6 and is reflected along the light channel 6 by wall surfaces 9 of the light channel 6 and is therefore blasted to the outlet opening 8. That by the
  • Outlet opening 8 emerging light 2 radiates on an active surface 10 of the optical sensor 5.
  • the optical sensor 5 is in this case arranged at the outlet opening 8.
  • the wall surfaces 9 of the light channel 6 are formed completely reflecting. Thus, light 2 emerges from the light channel 6 exclusively via the outlet opening 8 from the
  • the light guide 4, in particular the light channel 6, is formed lens-free. In particular, no lens is provided for beam focusing, refraction or beam steering in or at the inlet opening 7, in or on the light channel 6 or in or at the outlet opening 8.
  • Fig. 1 it is shown that the light channel 6 is frusto-conical. In this case, a diameter of the light channel 6 decreases from the inlet opening 7 towards the outlet opening 8.
  • a central axis z of the light channel 6 is shown, which is oriented orthogonal to a surface of the inlet opening 7 and is oriented from the inlet opening 7 to the outlet opening 8.
  • Fig. 1 it is shown that light beams 2 before and after reflection on the wall surface 10 of the light channel 6 in each section of the light channel 6 have a proportion which is oriented parallel to the central axis z and towards the outlet opening 8.
  • the direction before or after a reflection of the light rays 2 contains no portion which is oriented parallel to the optical axis z towards the inlet opening 7.
  • a light channel 6 is shown in a first embodiment in a longitudinal section.
  • the light channel 6 may be formed, for example, a truncated pyramid. It is shown that a first wall surface 9a or a first wall surface section is oriented parallel to the central axis z of the light channel 6.
  • the central axis z of the light channel 6 again corresponds to a center line of the inlet opening 7, which is oriented perpendicular to the surface of the inlet opening 7 and cuts it in a geometric center.
  • the central axis z does not run along the light channel 6 in the middle in the light channel 6.
  • the first wall surface 9a is thus not inclined. Further illustrated is a second
  • Wall surface 9b and a second wall surface portion which is inclined relative to the central axis z, in particular with a tilt angle ß.
  • E denotes a diameter or a width of the inlet opening 7.
  • D also denotes a diameter or a width of the outlet opening 8.
  • LOB designates a desired or necessary distance of the inlet opening 7 from the surface of the security document 3 to be detected along the central one Axis z. Further illustrated is a length L M of the light channel 6 along the central axis z.
  • the reference character ⁇ denotes by way of example a minimum angle of incidence of the light 2 on the first wall surface 9a.
  • the angle ⁇ denotes a detection angle.
  • a light beam 2 which impinges on the first wall surface 9a at the inlet opening 7 with the minimum angle of incidence ⁇ .
  • This light beam 2 is reflected at the first wall surface 9a with the angle of incidence, that is, the angle a, and radiated toward the second wall surface 9b.
  • the beam path of the light beam 2 is shown here for several reflections, wherein it is apparent that the angle of incidence and reflection decreases in a reflection on the wall surfaces 9a, 9b along the light channel 6.
  • N is the number of reflections.
  • the length L M and / or the size of the inlet opening E and / or the inclination angle ⁇ can be adjustable parameters during the production of the light guide body 4.
  • the relationship between inclination angle ß, the length of the light channel L M and the size of the inlet and outlet openings E, D is given.
  • These parameters can, for example, be determined in such a way that the light rays entering through the inlet opening 7 are radiated through the light channel 6 without back reflection in the direction of the inlet opening 7.
  • a maximum number of reflections can be determined, which can pass through the light rays entering through inlet opening 7 without being returned in the direction of
  • Inlet opening 7 determines the minimum angle of incidence for a beam that can reach the outlet opening 8 after multiple reflection.
  • Fig. 2 it is shown that for a beam with angle of incidence a after a third reflection from the second wall surface 9b, a back reflection in the direction of
  • Entry opening 7 takes place.
  • FIG. 3 shows an exemplary longitudinal section through a light channel 6 in a further embodiment. In contrast to that shown in Fig. 2
  • Embodiment is in this case, the first wall surface 9a and the first
  • FIG. 4 shows a schematic cross section through a device 1 according to the invention in a further embodiment.
  • the light channel 6 has a branching of the light channel 6 into a first sub-channel 11a and into a second sub-channel 11b.
  • the first sub-channel 1 1 a here has the first outlet opening 8, wherein the second sub-channel 1 1 b has a further outlet opening 12.
  • the device 1 further comprises a further optical sensor 13 with an active surface 14 of the further optical sensor 13. Also shown is a beam splitter 15, the light from a main channel section 16 of the
  • the further optical sensor 13 is arranged at the further outlet opening 12, wherein light emerging from the further outlet opening 12 2 falls on the active surface 14 of the further optical sensor 13.
  • the optical sensors 5, 13 can serve to detect various properties of the light 2. Also, the optical sensors 5, 13 with each other
  • the optical sensors 5, 13 serve to detect different properties of the light 2.
  • the optical sensor 5 can be designed as a photodetector or as a photodetector combined with a spectral filter.
  • the further optical sensor 13 may be formed, for example, as a color sensor or spectral sensor. Also, the further optical sensor 13 may be formed as a CCD sensor.
  • a temporal course of the light intensity is detected by the first optical sensor 5, wherein a spectral.
  • Composition for example, a color of the light 2 is determined.
  • a central axis ⁇ of the first sub-channel 1 1 a is shown in Fig. 4, which corresponds to the central axis z of the main channel portion 16 of the light channel 6, wherein the central axis of the main channel portion 1 6 corresponds to a center line of the inlet opening 7.
  • an inlet opening 18 of the first sub-channel 1 1 a wherein the central axis ⁇ corresponds to a center line of the inlet opening 18 of the first sub-channel 1 1 a.
  • Wall surfaces of the first sub-channel 1 1 a are in this case inclined relative to the central axis ⁇ of the first sub-channel 1 1 a.
  • a central axis z 2 of the second sub-channel 1 1 b is shown.
  • the further central axis z 2 is in this case orthogonal to an inlet opening 1 7 of the second sub-channel 1 1 b oriented and intersects the surface of the further inlet opening 17 in her
  • Wall surfaces of the second sub-channel 1 1 b are in this case inclined relative to the central axis z 2 of the further sub-channel 1 1 b.
  • the central axis z 2 of the second sub-channel 1 1 b is inclined relative to the central axis Zi of the first sub-channel section 1 1 a.
  • FIG. 5 is a perspective view of a device 1 in another
  • both the first optical sensor 5 and the further optical sensor 13 are arranged side by side.
  • One dimension of the outlet opening 8 is in this case adapted to a dimension and geometry of the overall arrangement of the first optical sensor 5 and the further optical sensor 1 3.
  • the outlet opening 8 surrounds the rectangular envelope of the active surfaces 10, 14 (see FIG. 4) of the two sensors 5, 13.
  • the optical sensors 5, 13 can be designed to detect mutually different properties of the light 2 or to be combined with different optical elements, in particular filter elements.
  • a geometry of the light channel 6 and thus a design and / or arrangement of the wall surface (s) 9, 9a, 9b can be chosen freely.
  • the shape and arrangement is adapted to a geometry and / or dimension of the active surface 10, 14 of an optical sensor 5, 13.
  • the training and / or arrangement can be chosen such that no back reflection takes place in the light channel 6.
  • FIG. 6 shows a schematic cross section through a device 1 in a further embodiment.
  • the light channel 6 branches at a branch into a first sub-channel 1 1 a and a second sub-channel 1 1 b.
  • the branching is achieved here by the formation of the light channel 6, in particular by a corresponding wall surface course.
  • the branching is in this case designed such that light 2 from a main channel section 16 of the light channel 6 in a predetermined ratio in the first sub-channel 1 1 a and the second sub-channel 1 1 b irradiates. Shown is an inlet opening 17 of the second sub-channel 1 1 b and an inlet opening 18 of the first sub-channel 1 1 a.
  • central axes z 1; z 2 of the first sub-channel 1 1 a and the second sub-channel 1 1 b are also shown.
  • the central axes z 1; z 2 of the sub-channels 1 1 a, 1 1 b relative to the central axis z of the main portion 16 are each inclined.
  • a wall surface inclination of a wall surface of the first sub-channel 1 1 a and a wall surface of the second sub-channel 1 1 b along the first and second sub-channel 1 1 a, 1 1 b changes.
  • the wall surfaces of the first and the second sub-channel 1 1 a, 1 1 b are each formed curved.
  • the first optical sensor 5 is arranged at the first outlet opening 8, wherein the second optical sensor 13 is arranged at the further outlet opening 12.
  • the proposed device 1 offers several advantages. On the one hand, light losses are reduced since no lenses are used in the device 1. Is the
  • Outlet opening 8, 12 adapted to the respective optical sensor 5, 13, so also light losses can be minimized thereby, in particular if the active surface 10, 14 of the respective sensor 5, 13, the corresponding outlet opening 8, 12 completely fills or covers.
  • the proposed device 1 is less sensitive to a lateral positional deviation compared to the lens-based embodiment
  • the lateral measuring radiation source e.g., the emitting, reflecting, and / or scattering surface of the security document 3
  • Position deviation denotes a deviation perpendicular to the center line of the inlet opening 7.
  • the proposed device 1 is less sensitive to inclination of the surface of the security document 3 relative to this center line. This means that the amount of light directed towards the at least one outlet opening 8, 12 is not or only to a small extent dependent on the lateral positional deviation and / or inclination.
  • the inlet opening 7, in particular its geometry and / or dimension can be adapted to a geometry and / or dimension of a security feature of the security document 3.
  • the cost and weight of the device 1 can be reduced. Due to the high light efficiency can continue to use cheaper optical sensors 5, 13, which are also flexible in their shape selectable. Also results in a simple adjustment and maintenance.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant la détection d'une lumière rayonnée (3) d'un document de sécurité (3). Ledit dispositif (1) comprend au moins un corps guide de lumière (4) qui comprend ou forme au moins un canal de lumière (6) qui comprend un orifice d'entrée (7) et au moins un premier orifice de sortie (7), la ou les parois latérales (9, 9a, 9b) entourant le canal de lumière (6) étant réalisées intégralement de manière réfléchissante, le corps guide de lumière (4) étant réalisé sans lentille. L'invention concerne en outre un procédé de fabrication dudit dispositif.
PCT/EP2015/076950 2014-11-20 2015-11-18 Procédé et dispositif de détection de lumière rayonnée ainsi que procédé de production WO2016079174A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15800747.6A EP3221853B1 (fr) 2014-11-20 2015-11-18 Procédé et dispositif de détection de lumière rayonnée ainsi que procédé de production

Applications Claiming Priority (2)

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DE102014223745.9 2014-11-20
DE102014223745.9A DE102014223745A1 (de) 2014-11-20 2014-11-20 Verfahren und Vorrichtung zur Erfassung von abgestrahltem Licht sowie Verfahren zur Herstellung

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WO2016079174A1 true WO2016079174A1 (fr) 2016-05-26

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PCT/EP2015/076950 WO2016079174A1 (fr) 2014-11-20 2015-11-18 Procédé et dispositif de détection de lumière rayonnée ainsi que procédé de production

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EP (1) EP3221853B1 (fr)
DE (1) DE102014223745A1 (fr)
WO (1) WO2016079174A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713396A1 (de) * 1977-03-24 1978-09-28 Applied Photophysics Ltd Verfahren und vorrichtung zur kennzeichnung oder identifizierung eines leuchtmaterial enthaltenden oder tragenden koerpers
EP2043058A2 (fr) * 2007-09-27 2009-04-01 Sanden Corporation Dispositif d'identification de billets de banque
EP2573739A1 (fr) * 2011-09-26 2013-03-27 Sicpa Holding Sa Dispositif et procédé d'authentification d'entités optiquement variables
GB2507575A (en) * 2012-11-06 2014-05-07 Filtrona C & Sp Ltd Authentication device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4117011A1 (de) * 1991-05-24 1992-11-26 Gao Ges Automation Org Optischer sensor
DE10123470B4 (de) * 2001-05-15 2010-08-19 Carl Zeiss Jena Gmbh Verfahren und Anordnung zur berührungslosen Ermittlung von Produkteigenschaften
JP3841656B2 (ja) * 2001-06-12 2006-11-01 株式会社豊田中央研究所 光導波路デバイスの製造方法
DE102007011592A1 (de) * 2007-03-08 2008-09-25 Oerlikon Contraves Gmbh Vorrichtung zur Erhöhung der Lichtintensität einfallenden Lichtes, insbesondere für einen Laserwarner
WO2009110064A1 (fr) * 2008-03-04 2009-09-11 グローリー株式会社 Détecteur optique et prisme de guide d'ondes optiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2713396A1 (de) * 1977-03-24 1978-09-28 Applied Photophysics Ltd Verfahren und vorrichtung zur kennzeichnung oder identifizierung eines leuchtmaterial enthaltenden oder tragenden koerpers
EP2043058A2 (fr) * 2007-09-27 2009-04-01 Sanden Corporation Dispositif d'identification de billets de banque
EP2573739A1 (fr) * 2011-09-26 2013-03-27 Sicpa Holding Sa Dispositif et procédé d'authentification d'entités optiquement variables
GB2507575A (en) * 2012-11-06 2014-05-07 Filtrona C & Sp Ltd Authentication device

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DE102014223745A1 (de) 2016-05-25
EP3221853B1 (fr) 2022-06-22
EP3221853A1 (fr) 2017-09-27

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