CN101467182B - Apparatus and method for optically examining security documents - Google Patents
Apparatus and method for optically examining security documents Download PDFInfo
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- CN101467182B CN101467182B CN2007800214140A CN200780021414A CN101467182B CN 101467182 B CN101467182 B CN 101467182B CN 2007800214140 A CN2007800214140 A CN 2007800214140A CN 200780021414 A CN200780021414 A CN 200780021414A CN 101467182 B CN101467182 B CN 101467182B
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- 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
- G07D7/1205—Testing spectral properties
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- 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
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D11/00—Devices accepting coins; Devices accepting, dispensing, sorting or counting valuable papers
- G07D11/50—Sorting or counting valuable papers
Abstract
An apparatus for optically examining security documents (BN) has a detection region (14), in which a security document (BN) is located during the examination, and a spectrographic device (16). The latter has a spatially dispersing optical device (29) for at least partially breaking down optical radiation coming from the detection region (14) into spectrally separate spectral components which propagate in different directions in accordance with the wavelength, a detection device (30) which is spatially resolving in at least one spatial direction and is intended to detect the spectral components, and collimation and focussing optics (28) for collimating the optical radiation which is directed onto the dispersing device (29) from the detection region (14) and for focussing at least some of the spectral components formed using the dispersing optical device (29) onto the detection device (30).
Description
Equipment and the method and some that the present invention relates to a kind of optically examining security documents are used the equipment of handling paper representing value by inspection machine of the present invention.
Here, paper representing value refers to these article, and they for example should embody the value or the right of currency, and therefore can not make arbitrarily without approval.Therefore they have some to process simply, the characteristic of especially duplicating, and having these characteristics is symbols of authenticity, that is to say it is to be made by a department that this is authorized.Some important example of this paper representing value are chip card, coupon, voucher, check and banknote especially.
In the characteristic of these paper representing values important one type be can optical identification characteristic, adopt the characteristic of luminescent substance especially to belong to this category feature, when with the irradiate light of provision wavelengths, these luminescent substances are exported the luminous rays that characteristic spectrum is arranged.Here, light refers to the electromagnetic radiation in ultraviolet ray, visible light or the infra-red range at electromagnetic spectrum.
In order to check authenticity, paper representing value can be used appropriate irradiate light.Then by the sensor check that is suitable for, see light on paper representing value or the excitation luminescence ray whether of the place of interior regulation, for this does spectral analysis to the light from paper representing value.
This check should be accomplished as far as possible rapidly and with low equipment investment; For the equipment of will be therein implementing validity check according to luminescence feature can design to such an extent that save the space as far as possible; What be worth pursuit is; Design the device structure of check luminescence feature very compact; But still enough spectrally resolved ability and susceptibility are arranged all the time, so that the existence of the luminous frequency spectrum of ability recognition feature.
Therefore the objective of the invention is, create a kind of equipment of optically examining security documents, it can realize a kind of very structure in compact saving space, and the corresponding method that a kind of verifying valuable ticket is provided.
By first kind of possibility, this purpose reaches through a kind of equipment of optically examining security documents, it have one when check paper representing value be in detection zone wherein, and one is used to check the spectral device from the light of detection zone.Spectral device comprises a spatial electro-optical device; Be used for will from the light of detection zone at least part be decomposed into spectral component spectral separation, that propagate towards different directions according to wavelength; A sniffer that carries out the locus resolution along at least one direction in space; Be used for especially spatially resolved detecting light spectrum composition; And collimation and focus lamp are used for collimation and with being used at least some are focused on sniffer by the spectral component that light-dividing device forms from the light of detection zone guiding light-dividing device.
By first kind of possibility, this purpose also reaches through a kind of like this method of optically examining security documents, wherein; Pass through optical frames, especially collimation and focus lamp from the light of paper representing value, form parallel-beam; This beam at least partly is decomposed into the spectral component of different wave length; These spectral components are propagated along different directions according to wavelength, and some spectral component focuses on the sniffer through optical frames at least, and detection focuses on the spectral component on the sniffer.
Equipment by first kind of possibility of the present invention; In order to check the paper representing value in detection zone, adopt a kind of being used for from detection zone, especially carry out the device of spectral resolution from the light (being also referred to as detected ray hereinafter) of the paper representing value in detection zone.Its light-dividing device that has living space for this reason, it with the light of injecting at least part be decomposed into some spectral components, these spectral components are propagated along the different directions in space according to the wavelength of spectral component separately.Here, said light-dividing device only needs and can in the wavelength coverage that a given in advance paper representing value of basis is stipulated, work.Along the light of the direction in space of regulation and thereby corresponding spectral component whether exist, by the detection of spatial discrimination.For part at least detects from the spectrum of the ray of detection zone, the detectable signal of sniffer can send to apparatus for evaluating and in that assessment.Here, detection zone can especially be chosen as, and a conveyer that is used for the regulation of paper representing value can be arranged, driving belt for example, and the paper representing value that will check is transported in this detection zone.
Sniffer can especially have a plurality of detecting elements, is used for surveying respectively penetrating the light on them and forming corresponding detectable signal, and they are preferably arranged with the form of row.Yet also can adopt the two dimensional field of forming by detecting element.
The characteristic of said equipment mainly is; Only use an optical frames, that is collimation and focus lamp, two tasks accomplished; That is the first is in the collimation of the light of detection zone wherein from paper representing value especially, with and two be that the spectral component after decomposing is focused on the sniffer.
This suggestion about simple structure out of a clear sky is based on observation: compare with spectrometer with scientific research; As long as for the verifying valuable ticket has the spectrally resolved ability of appropriateness just much of that, this resolution characteristic can reach with the device of being advised simply.
Only use a collimation and focus lamp can also behind this optical frames, realize a kind of simple at least folding raypath, thereby allow under the situation that only needs little locus, good spectrally resolved ability is arranged.
With other schemes that can consider, that is adopt the imaging grating to compare, another advantage that obtains is, light-dividing device and collimation and focus lamp are all fairly simple, and thereby is can be easily and the parts of production cheaply.
In addition, only need adjustment collimation and focus lamp, and when collimation adopts optical frames separately with focusing, will adjust two optical frames.
Another advantage of the structure of advising is, can reach the very high numerical aperture of raypath between collimation and focus lamp.
Collimation and focus lamp can design arbitrarily in principle.For example, it can contain the optical component of at least one imaging mirror as collimation and focusing.But in order to reach simple as far as possible raypath and inexpensive structure, collimation and focus lamp preferably have at least one lens, and here it can relate to a kind of refractor or diffraction light lens.
For reaching good spectral resolution and can assessing and calibrate sniffer simply, in said equipment, said collimation and focus lamp can be achromatic.Understanding to this is that this optical frames carries out colour correction at spectral device in those spectral region of wherein working; Preferably, the focus of two different wave lengths in the regulation spectral region overlaps each other.Adopt the advantage of achromatism optics mirror to be, the ray from detection zone guiding decomposer does not decomposite additional spectrum to good approximation, and especially when spectral component focuses on the sniffer, occurs aberration at the most in a small amount.Here; For when adopting the device of incident diaphragm or a kind of equivalence; As far as possible near by aperture of the diaphragm size, the given theoretical resolving limit of the slit width when the clearance type diaphragm for example, should make every effort to because aberration and in the spectral region that equipment will confirm or form in the work spectral region, on sniffer the unintelligible scope of picture point; Remain preferably less than 1/5 of aperture of the diaphragm size particularly preferably 1/10.
In principle, sniffer can be with respect to arranging arbitrarily from the raypath of the ray of detection zone and directed.Yet in this equipment, preferably, make from detection zone and penetrate the directions of rays on collimation and focus lamp, with respect to plane inclination by expansion in the zone of spectral component between collimation and focus lamp and sniffer.This form of implementation allows the special ground, space of saving to arrange sniffer.Especially launch as face under the situation on a plane in spectral component, sniffer can comprise the detecting element that delegation extends along the direction on this plane, they at one by above or below the given plane of the raypath of the ray of detection zone, extending.Equally preferably, between collimation and focus lamp and decomposer, from the direction of the ray of detection zone, with respect to a plane inclination by expansion in the zone of spectral component between collimation and focus lamp and decomposer.
In addition, in this equipment at least in the section before is located immediately at collimation and focus lamp, spectral component on sniffer is launched and the geometric projection that constitutes on the plane on border is in this plane by penetrating at one from the ray of detection zone.Obtain the structure of a kind of special saving locus thus.
In addition, diaphragm and projection lens's group that is located in collimation and the focus lamp focal plane point is set in the raypath from the detection zone to the spectral device in this equipment, is used for detection zone is projected to diaphragm.Here, diaphragm especially can be a diaphragm entity that the aperture of the diaphragm is arranged, or also can be ray steering component or the steering component that a partial reflection detected ray is at least arranged, constitute the face of diaphragm, for example catoptron or beam splitter.
Therefore particularly preferably, sniffer is along a direction and diaphragm partition distance, and this direction is vertical along that direction that it separates with spectral component.Make the structure of equipment compact especially thus.
By diaphragm is preferably seen the side that is in sniffer along the direction of spectral component space segmentation., press the location of equipment here with respect to the bottom, the side also be appreciated that into above or below.If adopt the sniffer that delegation's detecting element is arranged, then capable perpendicular line preferably itself intersects with detecting element is capable from diaphragm to said detecting element.
In principle, can use a kind of combination of any optical component or optical component as light-dividing device, it with the ray of injecting at least part be divided into some spectral components, their are propagated along different directions according to wavelength separately.For example can use prism.But the light-dividing device of equipment preferably has a grating.Preferably can use the spectral component of first order of diffraction here as spectral component, yet also can consider to use the higher order of diffraction.The advantage of this form of implementation is, can be simply and obtain any spectral region, the especially grating of infrared region cheaply.Grating can relate to any grating of for example processing through machining, lithography or holographic photography.
Preferably grating here is a kind of reflection grating, and it is directly led back spectral component in said collimation and the focus lamp, can obtain a kind of special compact structure thus.
In addition preferably, grating designs and is chosen as with respect to sniffer, and the Zero-order diffractive ray is not penetrated on sniffer.The advantage of doing like this is that the Zero-order diffractive ray can select to be used to carry out other inspections.Can especially adopt echelon grating as grating.Particularly preferably use blazed grating (also claiming blazed grating) as echelon grating.Its advantage is through suitable design and configuration grating, can obtain the extra high ray that is given for the order of diffraction that forms spectral component of intensity.
Grating is directed with respect to the light shaft positive cross of collimation and focus lamp with the linear structure that it plays the branch light action.In this case from the ray of detection zone must with respect to inclined light shaft penetrate on grating.Yet preferably, the linear structure of grating is with respect to the inclined light shaft of collimation and focus lamp.This just can adjust all easily each other and be located at the member between detection zone and collimation and the focus lamp.
In addition, light-dividing device itself can be reflection or combine with reflecting element, reduce the quantity of optical component thus.Yet also can adopt a kind of device of beam split in transmission as light-dividing device, wherein establish steering component, catoptron for example is in order that reflect back in collimation and the focus lamp ray composition that is produced by this device.Especially preferably further develop by one, sniffer has at least two edge detection elements, and they are arranged as, and part detected ray path is passed between them extended.Extend through sniffer in detected ray path from the detection zone to light-dividing device part at least, thereby obtain a kind of structure that helps saving the space.
The structure in but this saving space has more than in by the equipment of first kind of possibility or when using said collimation and focus lamp and obtains.
Exactly; Generally speaking also can reach this purpose by second kind of possibility through a kind of equipment of optically examining security documents; Equipment have one when check paper representing value be in detection zone wherein, and spectral device, the latter comprises a spatial electro-optical device; Be used for will from detection zone along the light in detected ray path at least part be decomposed into spectral component spectral separation and that propagate towards different directions according to wavelength; And one is carried out the sniffer of spatial discrimination towards at least one direction in space, to be used for the detecting light spectrum composition; The latter has at least two edge detection elements, and they are arranged as and part detected ray path are passed between them extend.
In these two kinds of possibilities, sniffer can also have other detecting elements except two edge detection elements mentioning, and they are connected with these detecting elements respectively and arrange in a row.Here except that their position, the edge detection element need not to be different from other detecting elements that possibly exist, and comes although can distinguish.Therefore obtain a kind of sniffer with two detecting elements along the detector row of delegation's arrangement.These detector row form a space, and extend through the space at least a portion detected ray path.Two edge detection arrangements of elements are in the both sides in said space.
If with device design do, the detected ray path is parallel to the plane extension by the raypath decision of spectral component in the zone of two edge detection elements, and then these two kinds of possibilities all can obtain a kind of compact structure.Especially, the detected ray path behind two edge detection elements and the raypath of spectral component, part can be extended in a plane at least, can obtain a kind of flat especially structure thus.
In principle by in the equipment of second kind of possibility, light-dividing device is like design explaining in first kind of possibility, but should take different raypaths into account.Especially, light-dividing device can play reflex.If do not adopt collimation and focus lamp; Then in equipment, particularly preferably be by second kind of possibility; The spatial electro-optical device has an imaging beam splitter; It will be decomposed into spectral component from the light that detection zone passes at least one the predetermined spectral region that gets between the edge detection element and focus on the sniffer, preferably focus on its detecting element that comprises the edge detection element.The advantage that this form of implementation is brought especially only needs to use a small amount of member.
Also be applicable to light-dividing device with first kind of corresponding design of possibility by the equipment of second kind of possibility.Especially light-dividing device preferably can have a grating, its preferably a kind of echelon grating, and its ladder is chosen as, and the ray of Zero-order diffractive is not penetrated on sniffer.Use grating to allow the decomposition of special flexibility and changeability ground adjustment spectral component.In addition, grating can be designed to reflection grating simply, thereby obtains the few structure of a kind of element.
As if grating is a kind of striated pattern, then preferably the linear structure of grating and directly the detected ray path quadrature before grating.Thus again can be with the detecting element of spectral component guide probe device.
Detecting light spectrum composition not in the zone between two edge detection elements.Therefore in the equipment by one of two kinds of possibilities, preferably raypath extends to sniffer from the spatial electro-optical device by this way, that is, a kind of spectral component of predetermined wavelength is guided between two edge detection elements.Thus, especially sniffer or its detecting element and light-dividing device can dispose by appropriate mode each other.Wavelength can be according to the application target regulation of equipment.If equipment for example should be used to measure luminous rays or Raman's ray, then the wavelength of regulation is preferably used the wavelength of the excitation ray of its excitation luminescence ray or Raman's ray.
Especially for what check that banknote often be worth to pursue be, in different spectral region, spectrally resolved ground of ability sense radiation in the visible light of spectrum and infrared ray part especially.Therefore in the equipment by one of two kinds of possibilities, preferably these two edge detection elements have the different spectrum detecting area respectively.If sniffer has two detector row, establish this two edge detection elements in their opposed ends, then preferably this two row detecting element has the identical spectra detecting area respectively, thus the detecting area of the detecting element of opposite side is different in the space.Especially; Detector row can have some to be used to survey the ray in the light visible region at least, silica-based detecting element for example, and has other to be used for that optimal wavelength is the detecting element of base greater than the ray of 900nm, with indium-gallium-arsenide semiconductor in the probing light infrared spectral range.This advantage of bringing is when space requirement is little, just can implement the spectrographic detection in special broadband.Especially can overcome drawback: silica-based detecting element wavelength greater than the spectral region of 1100nm in detection purpose susceptibility for reality low excessively.
In addition, in order in short as far as possible detection time, still to reach high signal to noise ratio (S/N ratio), in the equipment by one of two kinds of possibilities, preferably at least some detecting elements of sniffer have 0.1mm at least
2Sensing surface.Compare with using the CCD element thus, outstanding especially in the advantage aspect signal to noise ratio (S/N ratio) and detection time.
Particularly preferably, sniffer especially except two edge detection elements, also has some detecting elements, can produce some descriptions simultaneously by them and penetrate the ray characteristics on them, especially the detectable signal of intensity.The advantage that this form of implementation provides is, can detect simultaneously by detecting element according to the detectable signal that spectral component produces, and especially compares with the CCD field, and this allows high detection speed or measures repetition rate.Especially, detectable signal can independently of one anotherly read or produce independently of one another to detecting element.
Particularly preferably be in this case, by the equipment of one of two kinds of possibilities an apparatus for evaluating that is connected with detecting element through signal connection device arranged, its parallel detection is by the detectable signal of detecting element generation.This evaluation method selecting optimal equipment ground can be applied to, and only after the emission of a pulse, detects at least a spectrum, preferably detects the time sequencing of spectrum, and this is particularly advantageous in the check luminescence phenomenon.
Confirmed already in this respect that particularly advantageous was that apparatus for evaluating detects the detectable signal of detection element according to the signal of the pulse output of a description from the illumination beam to the detection zone.The luminous check of embodiment such as banknote very simply and meanwhile exactly thus is because can confirm in pulse output and the time interval between detecting.
In order to limit or avoid fully reducing the signal to noise ratio (S/N ratio) of detection because of external ray, by in the equipment of two kinds of possibilities, preferably establish wave filter in the detected ray path between detection zone and spatial electro-optical device, it is suppressed at the ray in the regulation spectral region.The spectral region of regulation then can be according to the application choice of equipment.If equipment for example is applied to measure luminous rays or Raman's ray, then the spectral region of regulation for example are the spectral ranges with the excitation ray of its excitation luminescence ray or Raman's ray.Yet also can use these wave filters, they only allow the ray in the spectral range given by the spectral component that will detect to pass through, and the ray outside this scope is significantly weakened at least.
In addition; In by the equipment of one of two kinds of possibilities preferably; Establish beam splitter in space that forms at detection zone and by two edge detection elements or the raypath between collimation and the focus lamp, can the part light from detection zone be discharged from the raypath of removing collimation and focus lamp by it.The advantage of doing like this is, do not reexamine spectrum from the ray of detection zone, but part can also be applied to other inspections at least, for example is used to the purpose that forms images, or is used in the spectral analysis of other spectral region of can be not analyzing by spectral device.By a kind of preferred especially form of implementation, mentioned wave filter is made up of the beam splitter that correspondingly designs for this reason.
The type that depends on illumination, equipment are not necessarily to need an import slit, or general incident diaphragm or other devices that satisfies identical function.Yet preferably, the equipment by one of two kinds of possibilities has at least one to satisfy the member of incident diaphragm functionality.
Equipment can for example have an incident diaphragm, and it that is in the field depth of the image-forming component after being located at the import slit along raypath, is in the plane of detecting element at least approx.Said incident diaphragm can be stipulated as independent member, but preferably it passes through the bearing formation of detecting element and/or one or more detecting elements.Obtain a kind of simple especially structure thus.When in the detected ray path of light-dividing device, using a beam splitter or ray steering component from detection zone, beam splitter or ray steering component, for example catoptron satisfies the function in import slit equally.In the external ray of shielding, lose special lowland transmission detected ray; In equipment, preferably reach like this by one of two kinds of possibilities; That is, in the detected ray path, establish the optical conductor of guiding detected ray, its end is located between two edge detection elements.Said end can preferably be born the function in import slit equally.Beam splitter especially also is interpreted as any element that is used for ray guidance and also turns in case of necessity here, and light can detect by light-dividing device and sniffer spectrally resolvedly.Therefore depend on that these Design of device, beam splitter especially also can be designed for the invisible ray in the guiding infrared spectral range.
Though can consider with the ambient light detection zone that throws light on a radiographic source is arranged in principle, be used for the illuminating ray at least one provision wavelengths scope of detection zone output by the evaluation method selecting optimal equipment ground of one of two kinds of possibilities.Here illumination beam can be used as reflected light or transmitted light.
Preferably, for the illumination of detection zone at least one semiconductor radiographic source is arranged by the equipment of one of two kinds of possibilities.Adopt the semiconductor radiographic source that series of advantages is arranged.For example the semiconductor radiographic source has the serviceable life more much longer than other radiographic sources usually.In addition, the power input that its needs for the light of exporting regulation power is lower and produce less used heat, thereby obviously reduces the requirement of device cooling.In addition, semiconductor radiographic source can be bought, thereby simple excitation ray in the provision wavelengths scope can be created in to different wavelength range.Can for example consider photodiode or superluminescent diode as the semiconductor radiographic source, but preferably consider semiconductor laser.Here the semiconductor radiographic source not only refers to the member based on inorganic semiconductor, and refers to the member based on organic substance, especially Organic Light Emitting Diode (OLED).
In principle, when using the indirect lighting device of detection zone, illumination beam can be radiated at above it with respect to paper representing value obliquely.Yet preferably, in the raypath from the detection zone to the spectral device, establish beam splitter, the radiogenic light of semiconductor arrives through its, especially be directed in the detection zone or on.The advantage of doing like this is, but less scattering appears in illumination beam quadrature ground guiding paper representing value thus, and this scattering meeting hinders to be surveyed.Particularly preferably adopt a kind of dichromatism beam splitter; Can be by it with the ray in the illumination beam scope that arrives detection zone; Separate with the detected ray of in the wavelength coverage of regulation, implementing spectral resolution from paper representing value, wavelength coverage for example can be selected according at least one optical signature of paper representing value.This has improved the signal to noise ratio (S/N ratio) when surveying.
Another technical theme of the present invention is a kind of equipment of handling paper representing value; It comprises a transfer path by the paper representing value that is used for by the said equipment that is used for the verifying valuable ticket of one of two kinds of possibilities and handling of the present invention, and it extends in detection zone and/or through its.Here, transfer path can especially have the conveyer of a transmission paper representing value, for example driving belt.Especially consider to be used for the equipment of banknote counting and/or sorting as treatment facility, be used to accept and export the especially automatic teller of banknote of paper representing value, and the equipment that is used for the paper representing value validity check.
By accompanying drawing the present invention is described exemplarily further below.Wherein:
Fig. 1 schematically illustrates a banknote screening installation;
Fig. 2 schematically illustrates the banknote inspection machine vertical view by first kind of preferred form of implementation of the present invention;
Fig. 3 schematically illustrates the partial side view of equipment among Fig. 2;
Fig. 4 schematically illustrates the banknote inspection machine vertical view by second kind of preferred form of implementation of the present invention;
Fig. 5 schematically illustrates the partial side view of equipment among Fig. 4;
Fig. 6 schematically illustrates the banknote inspection machine vertical view by the another kind of preferred form of implementation of the present invention;
Fig. 7 schematically illustrates the partial side view of equipment among Fig. 6;
Fig. 8 schematically illustrates the banknote inspection machine vertical view that also has a kind of preferred form of implementation by the present invention;
Fig. 9 schematically illustrates the partial side view of equipment among Fig. 8;
Figure 10 schematically illustrates the banknote inspection machine vertical view by the another kind of preferred form of implementation of the present invention;
Figure 11 schematically illustrates the partial cutaway view of equipment among Figure 10;
Figure 12 schematically illustrates a detector configuration skeleton view with optical conductor of equipment among Figure 10;
Figure 13 schematically illustrates the banknote inspection machine vertical view that also has a kind of form of implementation by the present invention; And
Figure 14 schematically illustrates the detecting element arrangement plan of different in width.
Fig. 1 representes a banknote screening installation 1 as the example of the equipment of handling paper representing value, and it has an inspection machine by first kind of preferred form of implementation of the present invention.
Banknote screening installation 1 has banknote BN import 3 in shell 2, the one-tenth bundling note machine BN that handle can or manually or automatically, after removing tie in advance, in the input import, rick there then in case of necessity.Banknote BN in the input import 3 extracts out from stacking through seperator 4 one by one, and is used to check the sensor device 6 of banknote to transmit by the conveyer 5 that limits transfer path through one.In this embodiment, sensor device 6 has a plurality of sensor assemblies that are installed in the public shell.These sensor assemblies are used to check authenticity, state and the P.V. that is verified banknote BN here.After passing through sensor device 6; The banknote BN that is verified is according to the inspection of sensor device 6 or the sorting criterion of assay and regulation; Via the railway switch 7 and relevant spiral classification piler 8 that can back and forth adjust between two diverse locations through switch signal respectively; Classification outputs in the outlet 9, and they can or manually take out, or see off automatically therefrom.The control of banknote screening installation 1, especially the check conversion of signals with sensor device 6 is the railway switch adjustment signal that is used for railway switch, here realizes by controller 10.
As mentioning; Sensor device 6 has the different sensor module in the present embodiment; Wherein only show the sensor assembly 11 that to introduce in detail below in the drawings; That is be used for the verifying valuable ticket by the preferred embodiment of the invention, the for example equipment of banknote BN, hereinafter referred to as inspection machine.Be used to discern the state of banknote BN, also can the property had enough to meet the need and the sensor assembly of P.V. or value of money be the sensor assembly common, that the professional is known, therefore do not need detailed introduction.
Pass through the configuration of inspection machine 11 optical components and the detection zone 14 that characteristic limits in addition; With the opposite side of sensor outer housing 12 be the boundary with selectable plate 33 in principle, thereby banknote BN can by among Fig. 2 the conveyer 5 of expression transmit through glass 13 other along the direction T that extends with drawing plane ground among Fig. 2.
The detected ray that gets into through the aperture of the diaphragm 27 is by spectral device 16 achromatic collimations and focus lamp 28 packs in this example.Collimation and focus lamp 28 only are expressed as lens to symbol in the drawings, but in the combination that in fact often is designed to some lens.Achromatic optical frames refers to, and this optical frames has carried out chromatic aberration correction in the wavelength coverage that spectral device 16 is worked.The corresponding correction is unnecessary in other wavelength coverages.Incident diaphragm 26 is configured to collimation and focus lamp 28, and the aperture of the diaphragm 27 at least very closely is in the focal plane point of collimation and focus lamp 28 incident diaphragm sides.
The sniffer 30 of spectral device 16 is used for along the spatially resolved detecting light spectrum composition of at least one direction in space.The detectable signal that when surveying, generates is supplied with the apparatus for evaluating 31 of spectral device 16, and it detects detectable signal, and serves as that the spectrum of spectrum that is detected and regulation is made comparisons in basis enforcement with this detectable signal.Apparatus for evaluating 31 is connected with controller 10, so that comparative result is transferred to controller 10 by corresponding signal.
In this example, spatial electro-optical device 29 is the reflection gratings that linear structure is arranged, and its line parallel extends through the aperture of the diaphragm 27 planes vertical and collimation and focus lamp 28 optical axises in one.The distance of line is chosen as, and making detected ray can be to be broken down into spectrum in the infrared spectral range at the spectral region of regulation in this example.Light-dividing device 29 is orientated for this reason, makes the spectral component of separation, is first order of diffraction in this example, focuses on the sniffer 30 through collimation and focus lamp 28.For obtaining signal to noise ratio (S/N ratio) as well as possible; The distance and the choice of location of light-dividing device 29 lines do; Making the not part of spectral resolution of detected ray, is the Zero-order diffractive ray in this example, does not inject in collimation and the focus lamp 28; But penetrate in the drawings on the collection of rays device of not expression plate that is used for the absorbing detection ray for example.
For obtaining compact structure as far as possible, make on the one hand light-dividing device 29 along both direction with respect to sniffer 30 and in the direction inclination of the detected ray of injecting between collimation and condensing lens and the reflecting member (here being light-dividing device 29) that impels raypath to fold.Because in the present embodiment; At collimation and condensing lens 28 and reflecting member; That is the direction of the detected ray between the light-dividing device 29 is parallel to the optical axis O extension of collimation and condensing lens 28; So at first, flat reflection grating 29 and thereby also have its linear structure, with respect to collimation and the optical axis O inclination of condensing lens 28 in the plane in detected ray path.Therefore, in the zone between light-dividing device 29 and collimation and condensing lens 28,, be a plane in this example, at least with respect to the direction of detected ray or the optical axis O inclination angle beta of collimation and condensing lens by the face S that spectral component generates.Especially, the normal of the reflection grating 29 that this in the plane in detected ray path is flat is with respect to angle beta (see figure 3) of optical axis O inclination of collimation and condensing lens 28.Second; Light-dividing device 16; The incident vertical line of direct reflection more precisely, that is here be the normal on reflection grating 29 linear structure planes is with respect to the direction of detected ray or the optical axis O between collimation and condensing lens 28 and the light-dividing device 29 angle [alpha] that tilts.
On the other hand; The detecting element 32 of sniffer 30 walk to few be arranged in approx in the plane that comprises the aperture of the diaphragm 27 and along one perpendicular to separated by a distance through the direction of propagation of the spectral component definite planar S and the aperture of the diaphragm 27, in Fig. 3, be in above the aperture of the diaphragm 27.In Fig. 2 and 3 for for the purpose of view is clear, the receiving plane of incident diaphragm 26 and detecting element 32 is expressed as and separates each other apart from the focal plane of parallel in collimation and condensing lens 28, however they are in the public plane basically in fact in this example.Direction along being parallel to detecting element 32 row sees that the aperture of the diaphragm 27 is positioned at capable center substantially.
Can find out by Fig. 2; Also draw thus; In the section between incident diaphragm 26 and collimation and condensing lens 28, that is to say, especially also directly before collimation and condensing lens 28; Launch and constitute the geometric projection on the plane A on border through penetrating in the spectral component on the sniffer 30 at one from the detected ray of detection zone 14, being in this is in the trapezoidal plane in this example.Obtain the configuration in a kind of special saving space thus.
In the present embodiment; Sniffer 30, incident diaphragm 26, collimation and condensing lens 28 and light-dividing device 29 designs also are arranged as; They are in the columniform space region; Its cylinder axis is through the optical axis decision of collimation and condensing lens 28, and its cylinder diameter is through diameter or the lens or the wherein diameter decision of maximum lens of collimation and condensing lens 28.Here, the length in cylindrical space district is 40mm preferably less than 50mm in this example.Make that thus the space requirement of light-dividing device 29 is especially little, meanwhile can reach a bore bigger with size compared numerical value.
For optically examining security documents in detection zone 14; Here be banknote BN; Paper representing value is used illumination beam, is with the light illumination of semiconductor radiographic source 18 that is applicable to the excitation luminescence ray in this example, and from the light of paper representing value; Here be luminous rays, through surveying the parallel probe beam of eyeglass 17 and collimation and condensing lens 28 formation one.It at least partly is decomposed into the spectral component of different wave length, and they are propagated along different directions according to wavelength.In Fig. 2, do not represented with a solid line, and represent with dotted line or dotted line by the spectral component of two kinds of given different wave lengths of first order of diffraction by Zero-order diffractive ray spectral resolution, that be reflected.These spectral components focus on the sniffer 30 through collimation and condensing lens 28, focus on more precisely on the row that comprises detecting element 32, and by they spatially resolved detections.Each detecting element 32 direction of propagation of attaching troops to a unit, and thereby according to the wavelength spectral component of attaching troops to a unit.Therefore apparatus for evaluating 31 constitutes a spectrum according to the position of detecting element 32 with by the lightness that they detect respectively respectively, can be made comparisons in it and standard spectrum then.
Second kind of preferred form of implementation shown in the Figure 4 and 5 is the type of light-dividing device to be the configuration of lighting device on the other hand with the difference of first kind of embodiment on the one hand.Therefore, identical member adopts same Reference numeral, and here also correspondingly is suitable for to the explanation of first kind of embodiment.
Adopt the flat reflection grating 29 of blazed grating 29 ' replacement now, it is that first order of diffraction is carried out towards the direction of direct reflection that its ladder tilts.Can obtain more high-intensity spectral component thus.
Lighting device can not change function around the optical axis rotation of first condenser 22 in first kind of embodiment in principle.In order to obtain a kind of simple as far as possible version, therefore in the present embodiment except that collimation and condensing lens 28, also be provided with semiconductor radiographic source 18 and collimator eyeglass 19.
The difference of other embodiment and first and second kinds of embodiment is, adopts steering component 25 ' replacement steering component 25, and it replaces incident diaphragm 26.A kind of corresponding modification of first kind of embodiment has been shown in Fig. 6 and 7.Among the figure for components identical adopt with first kind of embodiment in same Reference numeral, and the explanation to these elements here also is suitable in first kind of embodiment.Steering component 25 ' be the catoptron of the aperture of the diaphragm 27 sizes in first kind of embodiment now, and be arranged in the focal plane of collimation and condensing lens 28.
The difference of other preferred forms of implementation and top those forms of implementation of having described is again, sniffer 30 and 26 combinations of incident diaphragm.For this reason, aperture of the diaphragm design is in a thin plate that detecting element 32 also is installed simultaneously.
In further embodiments, lighting device 15 has photodiode, superluminescent diode or an OLED as radiographic source, replaces laser diode 18.
In further embodiments, lighting device 15 can also have at least two semiconductor radiographic sources, and they are at different emphasis wavelength, that is emission wavelength output light during with the mean value of emissive porwer weighting, and can switch on and off independently of one another.Can test side by side in different wavelengths thus.
In other preferred embodiments, can whole cancellation incident diaphragm 26.This moment, lighting device 15 was designed to, and it is in detection zone narrow, the elongated zone of only throwing light on, and first condenser 19 can contain a cylindrical lens for this reason.
The difference of other embodiment and top those forms of implementation of having described is again, and other lens also are set in the detected ray path, so that element and collimation and condensing lens 28 minimizing image defects or improvement illumination through surveying eyeglass.
The difference of other embodiment and top those forms of implementation of having described is, steering component 25 or 25 ' and be a beam splitter, so detected ray is passed the part that its penetrates, can for example export coupling for the image that generates paper representing value.
Also can use transillumination in further embodiments.
In addition, might not need to use the light-dividing device of reflection, for example reflection grating 29.For example another kind just this on the one hand with Fig. 6 and 7 illustrated embodiment various embodiment in, can in the detected ray path, after collimation and condensing lens 28, establish transmission grating 29 ", it at least partly is decomposed into some spectral components with detected ray.These spectral components can for example with respect to the catoptron of the plane inclination that launches through spectral component, reflex in collimation and the condensing lens 28 by at least one reflecting member 34 then.
Folding behind collimation and condensing lens through raypath, obtain than a kind of also possible facility compact the version of Duoing, in this also possible equipment, condensing lens is set at the back and sniffer replaces catoptron at transmission grating.
In further embodiments, sensor outer housing 12 and/or plate 33 also can have different designs or whole cancellation.
In addition, apparatus for evaluating 31 also can be combined in the controller 10 in further embodiments.
The difference of other preferred forms of implementation and top those embodiment that described is; Replace sniffer, replace the CCD of delegation element, have and establish the optical detection device of aligning; Cmos element for example, or have the optical detection device that is used to survey the light in other wavelength coverages.
Can for example be used in the equipment of handling paper representing value among Fig. 1 a kind of embodiment that in Figure 10 to 12, has represented this inspection machine, its all have been introduced like other inspection machine.
The sniffer of representing in detail among Figure 12 34 has a support 36 now; Be a ceramic basic unit in this example; Establishes first detecting element 37 in first row shape configuration 39 in this ceramic basic unit, and disposes 39 at second capable shape ' in establish second detecting element 38.In the present embodiment, detecting element 37 and 38 is only arranged along straight line.In Figure 12, below the contacting element 40 that the amplifier stage on the support is electrically connected with detecting element was in detecting element 37 and 38, the contacting element connected with the signal connection device that is connected evaluation circuits or apparatus for evaluating through a design.
Detecting element 37 and 38 is in the opposite side of support 36 interior grooves or mouth 41, and said in the present embodiment groove or mouth 41 are designed to rectangle.Therefore between two edge detection elements 42 and 43, there is a space.
Detecting element 37 and detecting element 38 differences are their spectrographic detection scope.
Detecting element 37 relate to detection in visible spectrum and infrared ray environs that is until the detecting element of the light of wavelength 1100nm.Their available spectrographic detection scopes are between 400nm and 1100nm in the present embodiment.For example can adopt silica-based detecting element here.
Detecting element 38 relates to the detecting element of the light of detection in infra-red range.Their available spectrographic detection scopes are between 900nm and 1700nm in the present embodiment.For example can adopt the basic detecting element of indium gallium arsenic (InGaAs) here, their spectral region more than 900nm are sensitive.
Detecting element 37 and 38 is set to respect to light-dividing device 29, make spectral component that wavelength surpasses 900nm from light-dividing device guide probe element 38, and the spectral component of wavelength below 900nm is from light-dividing device guide probe element 37.
Compare with the CCD field, only need the detecting element 37 and 38 of usage quantity much less, for example quantity is between 10 and 30, and however they have bigger detection area and the part in the non-photosensitivity district that dwindles.Here detection area is confirmed as, and only detects and injects the light on this area.
Test surface preferably has 0.1mm at least
2Area, its height is 2mm and wide for 1mm in this example, wherein the non-photosensitivity district between adjacent detecting element is about 50 μ m.
In the present embodiment, detecting element 37 and 38 can be read independently of one another one by one and especially abreast.
In addition, the amplifier stage of each detecting element of having mentioned in the present embodiment also contains an A/D converter, it will be separately the analog signal conversion of detecting element be digital detection signal, this digital detection signal is described and is penetrated the transmitted intensity on test surface.
In the detected ray path, establish optical conductor 35 by the transparent material system that is suitable for, it at least the guiding in the spectral range that the equipment that can be verified detects get into its inner detected ray, and towards the direction deflection of light-dividing device 29.
A detected ray of optical conductor 35, is located in mouthfuls 41 and thereby is located in the focal plane point of collimation and condensing lens 28 from end 44 that optical conductor penetrates through its.Therefore the detected ray path is passed between two edge detection elements 42 and 43 and is extended.Here, the outgoing plane of optical conductor 35 or end 44 constitute the incident diaphragm or the import slit of spectral device.
Can find out by Figure 11, light-dividing device 29, its grid stroke especially, in the plane of in Figure 11, representing with optical axis O vertical orientation.On the contrary, in the plane of the plane in shown in Figure 10 and Figure 11, the linear structure given by grid stroke then tilts with respect to optical axis O.
Therefore, the spectral component that produces through light-dividing device 29 focuses on the sniffer 34 by collimation and condensing lens 28, focuses on more precisely on detecting element 37 and 38, and therefore detecting element surveys corresponding spectral component.
Through this configuration of selecting to constitute, can reach the detected ray path is extended in the plane of being confirmed by the spectral component that generates by light-dividing device 29 abreast or at least by optical conductor 35, collimation and condensing lens 28, light-dividing device 29 and sniffer 34.
Here angle [alpha] is chosen as, wavelength according to the rules, and provision wavelengths is through using the luminous excitation wavelength of luminous measurement regulation in this example, and spectral component is focused in the space between two edge detection elements 42 and 43 also thereby is not detected.
As a kind of possibility, apparatus for evaluating 31 ' liken following modification mutually to: basically can parallel detection detecting element or the detectable signal of sniffer with apparatus for evaluating 31.The substantially parallel here meaning is, detectable signal can have at least so difference of degree with regard to their time location, this species diversity as for example by a kind of method of multiplexing through a bus necessary that kind when the apparatus for evaluating 31 ' transmission.
In addition, apparatus for evaluating 31 ' be designed to towards the pulse output signals direction of semiconductor radiographic source 18, after the luminous given moment according to expection, detects the detectable signal of sniffer 34.
Detecting element 37 can parallelly be read with 38 thus, thereby can realize short integrated time and especially high measurement repetition frequency.Said measure helps improving signal to noise ratio (S/N ratio) equally.
This inspection machine especially can be used in implements so-called " single (single-shot) " measurement, and this moment, only to the single-measurement of an illumination or holding property of driving pulse direction enforcement luminous rays spectrum, it had enough assessment precision.
In addition; Apparatus for evaluating 31 ' can be designed to by selection makes and can also inspection machine be used in, after passing through the pulse of semiconductor radiographic source output drive; The detectable signal of repeated detection detecting element and thereby detect a plurality of spectrum, and evaluate spectra development in time thus in chronological order.
Press the another kind of form of implementation of Figure 13, only be with the difference of above-mentioned Figure 10 to 12 illustrated embodiment, collimation and condensing lens 28 be beam splitter 45 replacements of the imaging of light-dividing device 29 usefulness of flat reflection grating in form, to bear their function.Member and part that other are all are constant, thus they are used identical Reference numeral, and also be applicable to this to the detailed description of the foregoing description.
Adopt the beam splitter of holographic grating 45 as imaging now, it is the end 44 of optical conductor 35 spectrally resolvedly with incident diaphragm 44 in this example, imaging on detecting element 37 or 38.
Imaging grating 45 preferably every in this example mm has about more than 300, and although particularly preferably about striped or line more than 500, that is diffraction element are in order that compact conformation but still can sufficiently be dispersed in the luminous rays on the detecting element 21.Here, the distance between imaging grating 45 and the sniffer 34 is preferably less than about 70mm, particularly preferably less than about 50mm.
Can also stipulate that in further embodiments each detecting element 45 especially has different sizes along the dispersion direction of spectral component, shown in Figure 14 exemplified.Because be not all wavelengths of evaluate spectra or the wavelength zone of only assessing same widths usually; But on purpose only assess the wavelength zone of individual wavelengths or different in width, so can be designed as with the wavelength (district) that will assess separately, the width of detecting element is parallel to matchingly by the definite plane of spectral component.
Press another kind of embodiment again; Especially wherein use the embodiment of a collimation and focus lamp; Can before sniffer or delegation's detecting element, establish cylindrical lens, detected ray focuses on the detecting element, and it is directed that its cylinder axis is parallel to described row for this reason.
By this cylindrical lens, can increase detection zone and be used in the section of detection with the corresponding direction of direction of the cylinder axis quadrature of cylindrical lens along one, and thereby raising can supply to survey the intensity of use.
Claims (16)
1. the equipment of an optically examining security documents (BN); It comprises that one is in detection zone (14) wherein at when check paper representing value (BN); An and spectral device (16); This spectral device has: a spatial electro-optical device (29), be used for from the light of detection zone (14) at least part be decomposed into spectral component spectral separation, that propagate towards different directions according to wavelength; A sniffer (30 that carries out spatial discrimination along at least one direction in space; 34), be used for the detecting light spectrum composition; And collimation and focus lamp (28) are used for being used at least some being focused on sniffer (30 by the spectral component that light-dividing device (29) forms from the collimation of the light of detection zone (14) guiding light-dividing device (29); 34) on, wherein, penetrate the directions of rays on said collimation and focus lamp (28), with respect to a plane inclination by expansion in the zone of spectral component between collimation and focus lamp (28) and sniffer (30) from detection zone (14).
2. according to the described equipment of claim 1, wherein, said collimation and focus lamp (28) are achromatic.
3. according to the described equipment of claim 1; Wherein, In being next to said collimation and focus lamp (28) at least one section before, spectral component on sniffer (30) is launched and the geometric projection that constitutes on the plane (A) on border is in this plane by penetrating at one from the ray of detection zone (14).
4. according to the described equipment of one of claim 1 to 3; Wherein, Diaphragm (26) and a projection lens's group (22,23) that is located in collimation and focus lamp (28) the focal plane point is set from detection zone (14) to the raypath of said spectral device (16), and this projection lens's group (22,23) is used for the ray from said detection zone (14) is projected diaphragm (26).
5. according to the described equipment of claim 4, wherein, said sniffer (30; 34) along direction and diaphragm (26) partition distance, this direction and spectral component are along its that direction quadrature that separates.
6. according to the described equipment of one of claim 1 to 3, wherein, said light-dividing device (29) has a grating.
7. according to the described equipment of claim 6, wherein, said grating (29) designs and is chosen as, and the Zero-order diffractive ray is not penetrated at said sniffer (30; 34) on.
8. according to the described equipment of claim 6, wherein, the linear structure of said grating (29) tilts with respect to the optical axis (O) of said collimation and focus lamp (28).
9. according to the described equipment of one of claim 1 to 3, wherein, said sniffer (30; 34) at least two edge detection elements (42,43) are arranged, they are arranged as and part detected ray path are passed between them extend.
10. according to the described equipment of one of claim 1 to 3; It has at least one semiconductor radiographic source (18) for the illumination of detection zone (14); Wherein, In from detection zone (14) to the raypath of spectral device (16), be provided with beam splitter (21), the light of semiconductor radiographic source (18) arrive within the detection zone (14) through this beam splitter (21) or on.
11. according to the described equipment of one of claim 1 to 3; Wherein, Said sniffer (34) has some detecting elements (32,37,38,42,43), can produce the detectable signal that the light intensity on them is penetrated in some descriptions simultaneously by these detecting elements (32,37,38,42,43).
12. according to the described equipment of claim 11, it has one through signal connection device and a plurality of said detecting element (32; 37, the apparatus for evaluating (31 that 38,42,43) connects; 31 '), this apparatus for evaluating parallel detection is by a plurality of said detecting elements (32; 37, the detectable signal that 38,42,43) generates.
13. according to the described equipment of one of claim 1 to 3, wherein, in the detected ray path between detection zone and spatial electro-optical device (29) wave filter is set, it is suppressed at the ray in the regulation spectral range.
14. according to the described equipment of one of claim 1 to 3, wherein, said sniffer (30; 34) at least some detecting elements (32; 37,38,42,43) 0.1mm is at least arranged
2Sensitive area.
15. according to the described equipment of claim 12, wherein, said apparatus for evaluating from the signal of illumination beam to detection zone pulse output, detects sniffer (30 according to a description; 34) detecting element (32; 37, detectable signal 38,42,43).
16. equipment of handling paper representing value (BN); It comprises one according to the described equipment of one of claim 1 to 3 and a transfer path (5) that is used for pending paper representing value (BN), and this transfer path (5) extends in the detection zone (14) and/or passes detection zone (14).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006017256.6 | 2006-04-12 | ||
| DE102006017256A DE102006017256A1 (en) | 2006-04-12 | 2006-04-12 | Optical examination device for value documents, has coverage area, spectrographic equipment, detection device terminating in spatial direction for detecting spectral components |
| DE102006045624.6 | 2006-09-27 | ||
| DE102006045624A DE102006045624A1 (en) | 2006-09-27 | 2006-09-27 | Device for optically examining security documents, has detection region, in which a security document is located during the examination, and spectrographic device, and device has spatially dispersing optical device |
| PCT/EP2007/003220 WO2007118655A1 (en) | 2006-04-12 | 2007-04-11 | Apparatus and method for optically examining security documents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101467182A CN101467182A (en) | 2009-06-24 |
| CN101467182B true CN101467182B (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800214140A Active CN101467182B (en) | 2006-04-12 | 2007-04-11 | Apparatus and method for optically examining security documents |
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| Country | Link |
|---|---|
| CN (1) | CN101467182B (en) |
| DE (1) | DE102006017256A1 (en) |
| ZA (1) | ZA200808483B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008028689A1 (en) | 2008-06-17 | 2009-12-24 | Giesecke & Devrient Gmbh | Sensor device for the spectrally resolved detection of value documents and a method relating to them |
| DE102008028690A1 (en) | 2008-06-17 | 2009-12-24 | Giesecke & Devrient Gmbh | Sensor device for the spectrally resolved detection of value documents and a method relating to them |
| DE102009025368A1 (en) | 2009-06-18 | 2010-12-23 | Giesecke & Devrient Gmbh | Optical system and sensor for testing value documents with such an optical system |
| JP5568798B2 (en) * | 2010-05-25 | 2014-08-13 | 旭精工株式会社 | Coin sorting device and two-dimensional imaging device for coin discrimination |
| DE102010051087A1 (en) * | 2010-11-12 | 2012-05-16 | Beb Industrie-Elektronik Ag | Method and device for checking the authenticity of banknotes with security windows |
| US9335254B2 (en) * | 2011-08-25 | 2016-05-10 | Glory Ltd. | Paper sheet recognition apparatus, light guide and light guide casing for use in spectrometric measurement of paper sheet |
| DE102016111354A1 (en) * | 2016-06-21 | 2017-12-21 | Bundesdruckerei Gmbh | AUTHENTICATION DOCUMENT |
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| EP1265199A2 (en) * | 2001-06-08 | 2002-12-11 | Giesecke & Devrient GmbH | Device for investigating documents |
| WO2006010537A1 (en) * | 2004-07-22 | 2006-02-02 | Giesecke & Devrient Gmbh | Device and method for verifying value documents |
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| US4146792A (en) * | 1973-04-30 | 1979-03-27 | G.A.O. Gesellschaft Fur Automation Und Organisation Mbh | Paper secured against forgery and device for checking the authenticity of such papers |
| US5666417A (en) * | 1993-09-27 | 1997-09-09 | Angstrom Technologies, Inc. | Fluorescence authentication reader with coaxial optics |
| WO2001016870A1 (en) * | 1999-09-02 | 2001-03-08 | West Virginia University | Method and apparatus for determining document authenticity |
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Also Published As
| Publication number | Publication date |
|---|---|
| ZA200808483B (en) | 2009-10-28 |
| CN101467182A (en) | 2009-06-24 |
| DE102006017256A1 (en) | 2007-10-18 |
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Effective date of registration: 20180309 Address after: Munich, Germany Patentee after: Jiejia German currency Technology Co., Ltd. Address before: Munich, Germany Patentee before: Giesecke & Devrient GmbH |
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