CN102324131A - Device for displaying file anti-counterfeiting mark - Google Patents
Device for displaying file anti-counterfeiting mark Download PDFInfo
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- CN102324131A CN102324131A CN2011102669859A CN201110266985A CN102324131A CN 102324131 A CN102324131 A CN 102324131A CN 2011102669859 A CN2011102669859 A CN 2011102669859A CN 201110266985 A CN201110266985 A CN 201110266985A CN 102324131 A CN102324131 A CN 102324131A
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Abstract
The invention provides a device for displaying a file anti-counterfeiting mark which is used for checking whether a banknote class file is true or false, and enables the observation of the anti-counterfeiting mark to be simple and convenient by utilizing a safe illumination. The device for displaying the file anti-counterfeiting mark comprises a first light source and a second light source used for illuminating a corresponding anti-counterfeiting part of a file, and also comprises an optical receiver used for transforming reflection light of the anti-counterfeiting part into an electrical signal, and an analysis device which analyzes the electrical signal come from the optical receiver, controls the light of the second light source and notices device users the related characteristics of the anti-counterfeiting mark. The first light source is operated under a pulse mode, an optical channel conducting the light radiated from the file to the optical receiver and an optical channel conducting the second light source to the file comprise a common area, and an optical system with a refractive power. The second light source changes the colors of the light by taking a detected mark as a characteristic in a given periodic sequence, and forms a visible form on a file surface containing the mark or information. The optical receiver may comprise various components, and the intensity distribution of the second light source in a discriminating zone reflects the physical size of the anti-counterfeiting mark distributed on the discriminating zone.
Description
Technical field
The present invention relates to real and fake discrimination, for example bank note is differentiated security document.
Background technology
The false proof mode of security document has multiple, normally to the additional specific properties of file, only if use specific installation, material and material, otherwise is difficult to maybe can't duplicate.Modal a kind of preventive means is the attribute that the part of figure has aspects such as special optics, magnetic, electronics on the banknote.The figure of this part on the banknote is called anti-fake mark.Some special protection flag attribute can with the naked eye be confirmed.The use of covert marks also very extensively need come specific its attribute with special devices.
The true and false of file often depends on the vision discriminating.For making hidden anti-fake mark visualization, must use specific equipment to show the specific properties of these anti-fake marks.This equipment is called as visual tester for real and false or anti-counterfeiting mark scope.When outward appearance is differentiated; Opinion through just making the true and false after the checking of many-sided organoleptic feature is fixed, such as the graphical content on the banknote, and visible anti-fake mark; The suppleness of paper and loudness also comprise the checking that use equipment carries out those sightless anti-fake marks simultaneously.
The most widely used invisible mark is infrared ray anti-fake mark and anti-Stokes fluorescence mark.The present invention mainly is be directed against these two types of marks visual.But, the present invention can be used to show the anti-fake mark of other types, the ultraviolet mark that sends like infraluminescence and ultraviolet shortwave.
The absorptive of the employed printing ink of infrared markers has difference in essence in visible light wave range and infrared band.For example, the single graphic element of composition is printed by two kinds of visually identical printing ink, but wherein a kind of printing ink absorbs light hardly in infrared band, and is meanwhile, another kind of then have higher optical density (OD).The result is that the part of graphic element is invisible in infrared band.Generally use the LED luminophor that these marks are carried out vision-based detection, at infrared band internal radiation file, and use has the TV tech system of camera, the imaging in seizure infrared ray (IR) spectrum.Discriminating person compares with the false proof regional imaging of visible file with reference to the imaging under the infrared light of the display screen demonstration of TV tech system.The outward appearance of the sightless figure that becomes under these infrared lights and size and master sample are compared each other.Whether conforming with these standards, is that discriminating person concludes one of a series of means of its true and false.It is that RU15040 (M ∏ К 7G07D7/00 announced on September 10th, 2000), denomination of invention are in the patent application specification of " differentiating the authenticity of banknotes instrument " that the description of the equipment of discriminating infrared markers is documented in the useful product invention patent No..
It is not integrated using the equipment of TV tech system, therefore can only under the unrestricted situation of shared place size, use.And in the place during limited or field work, instrument size must be little, such as pocket-size.This device is described in the patent specification that the patent No. is RU2395843, denomination of invention for " differentiate the mode of securities and realize the instrument of this mode " (M ∏ К 8G07D7/122010 announced July 27).Check the infrared ray anti-fake mark, instrument is placed on the mark position of paper surface.The discriminating of reflection coefficient directly is reflected on the point of instrument placement, realizes with infrared light and the mutual shot file of white light surface.Instrument moves at paper surface, passes the zone of anti-fake mark.In the reflection coefficient generation acute variation of infrared light, when keeping the visible light reflection coefficient constant simultaneously, send sound and light signal.Sort signal means has found anti-fake mark.
The drawback of existing infrared markers display device is that instrument is too complicated to the correlativity of banknote surface figure shaped reaction, makes troubles to the user.Such as, when using the equipment of mechanical video system, the operator must see the display screen of instrument, file and its imaging are compared, rather than file itself.The patent No. is the related equipment of RU2395843, and the differential point of file is hidden by device housings, can the person of being used not see.This makes the user to confirm to be the signal that discharges from which graphic element of file actually, gives and confirms that the position caused trouble.
The anti-Stokes fluorescence mark mainly is to use the special ink that has comprised so-called anti-Stokes fluorescence agent.Its characteristic is a relative long wave under the effect of illumination, and only the short wavelength regions to spectrum reacts.The most frequently used fluorescer all reacts to infrared light, but meanwhile luminous in visible-range.Differentiate that this anti-fake mark need shine the powerful infrared light of 940-1000 millimicron at paper surface.At the position of this irradiate light, the place that has the anti-Stokes fluorescence mark certain color that begins to flash.
Known patent number is RU2396600 (M ∏ К 8G07D7/00; Issue on August 10th, 2010), denomination of invention is in the instructions of " the professional instrument of differentiating securities and extraordinary bill and file "; Put down in writing the use infrared laser light source and be incident upon on the file, observed by the zone of LASER Light Source irradiation with the magnifier of observing the thin portion of file.Light impinges upon the false proof zone that has the anti-Stokes fluorescence mark, and the observer can see the light that reflection is come out through magnifier.
The same as other many equipment of LASER Light Source that used, the shortcoming of this invention is not enough to observing of laser safety requirement.Problem is, being used to observe the energy that the laser that has the anti-Stokes fluorescence mark must have must not be less than 30 milliwatt.According to international standard IEC 60825-1, this type laser generally belongs to 3B laser danger classes.The laser beam direct irradiation human eye or the skin of this grade can damage.The patent No. is that the laser of the equipment of RU2396600 only appears at this equipment that overturns as the user towards the possibility of user irradiation, and opens when differentiating the anti-Stokes fluorescence marking mode.In this case, laser may shine eyes and skin surface.The design of this device structure makes laser be difficult to leak towards user's direction.For this is protected, must use personalized safeguard procedures (like safety goggles), and prevent that the person opens laser (opening password as being provided with) without permission, implement safety practices such as special staff training and other personal protections.Need complicated with expensive safeguard measure like this, greatly reduce the possibility of using this equipment in the country of the many IEC of admitting 60825-1 standards.
For solving the safety assurance problem; The patent No. is that the instructions that RU2397546 (M ∏ К 8G07D7/12 issued on August 20th, 2010), patent of invention name are called " magnifieres that hide Info visual means and be used for observing of securities " is described in detail; This kind equipment has used led light source; Luminous comprising short time interval, frequency is not high yet, is the 3-6 hertz.As for extraneous light protection aspect, this kind equipment allows that the anti-Stokes fluorescence of observing on the paper surface anti-fake mark through magnifier is luminous.Being difficult to prevent under the field condition of extraneous light interference that it is not enough that the contrast on the mark possibly become, be unfavorable for observing and judge that this is a weak point of this equipment.Because the diversity of light emitting diode is higher, this equipment has adopted Muscovite laser safety standard (Ca н ∏ и H № 5804-91).But, international safety standard can not be guaranteed, because the dangerous method of definite radiation that these standards relied on has difference in essence.This also is a shortcoming of equipment, and many countries have used the big limitations of possibility quilt of this equipment.
The common weak point of the visualization device of some well-known anti-Stokes marks is that the visibility of mark under strong extraneous light is very poor, and such as when the outdoor application, the user will feel inconvenience.When using laser, improved laser power as the application of a countermeasure, thereby further increased user's eyes and the hurtful danger of skin.
Being noted that to differentiating the radiation level of the necessary illuminating lamp of infrared markers, all is in the scope of safety usually.
The anti-Stokes fluorescence body is had nothing in common with each other, and not only on the wavelength of excitation light wave and fluorescence radiation, have any different, and the characteristic of twilight sunset is also different.The characteristic of twilight sunset has reflected in the attenuation that stops to shine back and time correlation.The time that the twilight sunset of anti-Stokes fluorescence body commonly used continues is not waited from several milliseconds to tens microseconds, so when eyes observation has imaging device now, can not discover.Simultaneously, see on the characterizing definition with regard to twilight sunset that can distinguish two kinds of fluorophor, they distinguish very little on the composition of luminescent spectrum.This has increased greatly and has identified the chance of forging document, because the anti-Stokes fluorescence body on forging document is different with the false proof employed fluorophor of genuine piece.
The patent No. is US7, the related equipment and the means of United States Patent (USP) of 067824 (M ∏ К F21V9/16, issue on June 27th, 2006), and with the anti-fake mark on the pulsed light shot file, then, and through the time interval of equivalent, the adjustment intensity of illumination.Obtain the characteristic of the twilight sunset of fluorophor with the method.By built-in processor,, assert on the basis that is consistent which kind of genuine piece file belongs to the twilight sunset characteristic of this mark and the some known fluorophor persistence characteristic comparison that obtains in advance.The present invention does not relate to visualization device, because equipment itself is differentiated the true and false of file automatically, needn't be differentiated by the mode that the user compares to parameter with vision.Can not make one about automatic equipment itself, rather than the authenticity of on the basis of visual identity parameter comparison, accepting to state is maked decision.
The present invention is finding application process aspect the automation equipment of discriminating and handling banknotes.
Have in mind from the quality aspect of confirming authenticity, this is very desirable function for the discriminating twilight sunset attribute in the visual anti-fake mark equipment.But, known nowadays still unequipped this function of visualization device.
The patent No. is that the model machine of the described invention of RU2396600 is selected.
Summary of the invention
The purpose of application of the present invention is the convenience that realization illumination level safe in utilization is differentiated anti-fake mark; Through directly accomplishing the visual of anti-fake mark in banknote surface; Cancel visual brightness simultaneously, even also can carry out visualized operation under the condition of externally strong illumination.
Technical scheme below the present invention has adopted:
Technological achievement in addition also has: the more wide in range information that can notify the relevant anti-fake mark attribute of user.
The device that is used for the display file anti-fake mark comprises: first light source, and it makes the optical properties of hiding in the anti-fake mark under the effect of illumination, be able to show in the discriminating district of ray cast at file; Optical receiver, the light that is used to change from differentiating the district is electric signal; Secondary light source is used in differentiating the district to differentiating that distinguishing direction carries out the irradiation of visible light wave range; And being used for analyzing analytical equipment from the electric signal of optical receiver, analytical equipment may command secondary light source notifies the user in the discriminating district of file, to find the optical properties of hiding on the anti-fake mark with the mode of illumination.
Further, the luminous of first light source can be accomplished in pulse mode in the device.
Further, be used in the device light from file is delivered to optical receiver and is delivered to optical channel on the file from secondary light source having at least one total zone;
Further, the optical channel total zone that is used to transmit light can comprise the optical system that has the positive luminous power.
Further, the secondary light source of device provided by the invention can be accordinged to the characteristic of the mark of being found, in given periodic sequence, opens.
Further, secondary light source can the luminous color of conversion, and secondary light source can generate visible form at paper surface.At this moment, optical receiver can be a multielement, and the intensity distributions of secondary light source in differentiating the zone reacted, be exactly the size of the amount on this regional anti-fake mark physics meaning.
Further, visible form possibly comprise mark or information indicating.
The present invention can reach following technique effect:
Description of drawings
Fig. 1 is the overall pattern of device provided by the invention;
Fig. 2 is the sequential chart of signal when confirming the anti-Stokes mark;
Fig. 3 is the sequential chart of signal when confirming infrared markers.
Embodiment
Under the irradiation of first light source, anti-fake mark demonstrates its optical properties of hiding.The optical properties of hiding of anti-fake mark is able to find in the analysis of file being differentiated the light that the district launches.
For the infrared ray mark, diffuse transmission type is filled the air in irradiation, the paper surface reflectivity of the region of ultra-red of being convenient to touch upon.It is identical with the illumination wavelength of first light source to fill the air the diffuse transmission type irradiation.On the anti-Stokes fluorescence mark, the wavelength of fluorescence radiation is shorter with respect to the wavelength of first light source.
The anti-fake mark that secondary light source guaranteed visual, its light are invested the discriminating zone of file.The exposure intensity of secondary light source depends on the feedback that optical receiver is done the irradiation of first light source.If the illumination levels that optical receiver is received surpasses certain threshold value, secondary light source is opened under preferential selection of the present invention.The radiation of visible light of this light source is differentiated the surface, district at file, and the eyes that are observed the operator of paper surface observe directly.Therefore, the user might be directly with observed outward appearance to anti-fake mark under the visible light with distribute and directly compared at the visual hiding protection attribute of paper surface by the illumination of secondary light source.This has improved the convenience of equipment.
Secondary light source do not depend on the feedback level of anti-fake mark to first light source irradiation in the maximum brightness of paper surface point of irradiation, but secondary light source energy limited.This energy can be selected, even under bright sunlight, the point of irradiation of secondary light source also can be seen by the operator is clear.Such setting has also increased the convenience that instrument uses.
Can adopt LED light as secondary light source, LED is easy to the luminous flux that provides required.Equally, the semiconductor laser in the lower powered visible light wave range, 1 or 2 grade that presses IEC 60825-1 standard gets final product, and its energy is enough to provide the illumination of visibility good.Secondary light source is harmless to human eye and skin safe.If secondary light source adopts 1 or 2 grade the laser that conforms with IEC 60825-1 standard, then is safe.Adopt any laser in these ranks need not take preventive means.The LED light identical with 1 or 2 level laser energy is just safer, because it can be than the laser bigger luminous point of on the retina of eyes, appearing before one's eyes.Energy density on the big luminous point reduces, and has therefore also just reduced danger.
The visual instrument of known anti-Stokes mark, its visible light from irradiated file area need be by observer's eyes analysis.The equipment that application of the present invention relates to is different with above-mentioned instrument, analyzes the work of this light and is accomplished by optical receiver, and this is the excellent part of this equipment.That is to say, differentiate that the average power of necessary first light source of anti-fake mark can reduce greatly.This works under a pulse mode such as first light source owing to having adopted a series of well-known solutions, again such as having used the high selectivity receiver that the spectrum that receives is analyzed.First all can cut off the extraneous light that disturbs intensity of illumination with second solution, and this equipment that makes can be worked under the lower power level of first light source.In addition, the performance of optical receiver allows under the pulse mode in source, what lack, measures in the relatively very rare pulse that continues.Therefore, the average power consumption of necessity of first light source reduces greatly.
Be used to receive from observer's eyes of the light of anti-fake mark littler than adopting performance and spectral selectivity that optical receiver obtained.Therefore, visual in order to make anti-fake mark, the higher photo-emission source of average power when needing a ratio to adopt optical receiver in this case.This power almost always exceeds the security level of international standard defined.If the use optical receiver, its average power should be reduced in the safe range.
Use receiver simultaneously, light signal analytical equipment and secondary light source make the visual possibility that becomes of the additional parameter of anti-fake mark.Under anti-Stokes mark receiver and situation that analytical equipment combines, can confirm the after time of fluorophor.The performance that optical receiver and electric signal analytical equipment have is enough to the accurately time of definite twilight sunset.If anti-fake mark has certain through analyzing the additional features of differentiating that the regional light that sends could be confirmed, then the result of this analysis can reach visual through the light of control secondary light source.
With the additional features information notifying operation person who is found, can use the light mode that changes secondary light source, the characteristic of expression either this or that.Perhaps secondary light source can discontinuity be opened or close, and passes on the information of this type additional features with its interrupted mode.
The necessary supporting optical receiver of the invention of being applied for receives the light of differentiating the zone, obtains the light of differentiating regional secondary light source simultaneously.For this reason, can use the optical channel that has common region, in this total zone, differentiate that the light in zone is launched towards receiver along a direction, and be that secondary light source is towards differentiating district's emission in opposite direction.The utilization in the total zone of optical channel has been increased the compactedness of equipment.
Particularly, this total zone possibly comprise the optical system with positive luminous power, like lens or mirror system.This optical system and optical receiver and secondary light source are complementary, and act on to differentiate the zone.Like this, it is simpler that structure becomes, and needn't be equipped with light collecting system separately for optical receiver and light source again.
Can use optical projection system as secondary light source, it can project paper surface with some eye diagram.This system can use such as light emitting diode, liquid crystal matrix and projection lens and realize.The method that perhaps, can adopt the LED matrix to combine with projection lens.Under both of these case, according on matrix, forming image from the electric signal of receiver by the electroanalysis device analysis.Projection lens or wherein part can accomplish the mission of the optical system that is laid in the luminous power total zone of optical channel, the band positive.Projected image possibly be the symbol or the information of the one or more parameters of reflection anti-fake mark.
Optical receiver can be the such multielement of similar detector matrix.In this case, detector matrix can perception be distinguished the light intensity distribution of dispersing from paper surface irradiation discriminating.If this irradiation is sightless, the situation of similar discriminating infrared markers, its distribution can be visual with the graphic form that optical projection system generates at paper surface so.Like this, just can directly directly show in the structure of banknote surface with antifalsification label.
How to realize the true and false of visual anti-fake mark and the file 1 of confirming to have anti-fake mark 2, realize by following mode:
As shown in Figure 1, in the discriminating district 3 with the position insertion apparatus of anti-fake mark.Because when file distribution, generally all can announce the distribution plan of anti-fake mark 2, so the user very understands the distribution of anti-fake mark 2 usually.In described equipment, file can move in operating table surface like a cork, directly aims at and differentiates district 3.Such as, the operator is placed on file 1 on the desktop, then device is placed on its top.The eyes 4 that the external structure (in synoptic diagram, not showing) of device is allowed the operator are watched file 1 in differentiating district 3.
When the operator discerns the false from the genuine,, and anti-fake mark 2 characteristics of itself and genuine piece are compared at the visible reflection of light of file 1 surface observation.The complementarity accuracy of differentiating also comes from: when authenticating documents 1 surface does not have the position of anti-fake mark 2, the light reflection of anti-fake mark 2 characteristics should not occur having.
First light source is a laser 5.Its point of irradiation concentrates on the A point, is positioned to differentiate district 3.Laser 5 is with pulse mode work, and the duration of pulse is more obvious weak point than the interval time.The opening and closing of laser 5 are by the instruction control of control module 9, and said control module 9 is exercised the electric signal analytic function of equipment.Laser 5 is collected in the reception plane of photodetector 7 at the irradiation anti-fake mark 2 mutual light that produce by positive lens 6.The signal of photodetector 7 emissions is analyzed by control module 9.The labor algorithm will be described later.Control module 9 is opened.
LED (light emitting diode) 8 exercises the function of secondary light source, and anti-fake mark is visual.The light of light emitting diode 8 is collected by positive lens 6, focuses on the B point of differentiating district 3.Positive lens 6 have focal length F, and from differentiating the distance of district 3 at a distance of 2F, the reception plane and the light emitting diode 8 that leave photodetector 7 also are same distances.Like this, positive lens 6 provide a joint portion that single linear increases for differentiating district 3 and photodetector 7 distributed areas and light emitting diode 8.Light emitting diode 8 and photodetector 7 can be as much as possible each other near, therefore, the distance between A and the B point is little.Operator's eyes 4 receive the visible light of dispersing the light emitting diode 8 of reflection from file 1 surperficial B point.Because visible light is interpreted as the result that district 3 is differentiated in anti-fake mark 2 contacts from differentiating district 3 by the operator.If differentiating in the district 3 does not have anti-fake mark, then light emitting diode 8 is not opened, and the operator is interpreted as it and differentiates disappearance anti-fake mark 2 in the district 3.
The infrared band light of 980 millimicrons of wavelength of laser 5 emissions.Its based semiconductor laser diode meets the 3B rank of IEC 60825-1 standard, and laser diode has continuous light-emitting mode under this condition.Yet the duration of pulse of laser 5 and frequency selected is that must to meet first kind safety standard with the average power of laser 5 and other parameters be condition.The control circuit of the laser 5 in the control module 9 has limited the power supply of laser diode, even the light that when monistic fault appears in equipment, also can not occur exceeding beyond the one-level scope leaks.
If anti-fake mark 2 is anti-Stokess, then from differentiating that the light that district's 3 reflections are come out is in visible-range.But because average power consumption is lower, the operator can directly not observe it under observation condition.Short distance between the AB is a kind ofly to feel necessary for the observer creates, and lets him feel that his being seen light is from anti-fake mark 2.But, might be at the edge of anti-fake mark 2, the A point can get into mark, and the B point can be in the mark outside simultaneously.If the distance between the AB is big, then injects operator's eyes 4 and possibly cause explanation of error the anti-fake mark position from the B point.Want the explanation of debug, the size of the visible light spot of the light emitting diode 8 that sends from the B point should be near the distance between the AB.
The distance of AB can be reduced to permissible scope, if light emitting diode 8 is processed miniature shell with photodetector 7, can be at the P.e.c. of mounted on surface less than 1 mm wide, and the position is approaching each other each other on PCB.If the semiconductor crystal of two kinds of elements is positioned in the common miniature shell, just can obtain minor increment.
Find that the anti-Stokes marking mode is as shown in Figure 2.In initial time T
0Laser 5 is closed with light emitting diode 8, and photodetector 7 only obtains outside illumination.The reflection of ambient light response of the UD of said photodetector 7 is stored in control module 9, and is then used in correction to the response from the light of differentiating district 3.At time interval T
1T
2In, 5 short time of laser open.Because laser power is very high, photodetector 7 is in state of saturation at this moment.From time T
2Rise, laser 5 is closed, and has begun the twilight sunset of anti-Stokes fluorescence body.In time T
3The time, control module 9 is weighed the Um response of photodetector.T
2-T
3Delay slightly be that to withdraw from saturated institute essential for photodetector 7.If the size of Um-Ud surpasses predetermined threshold value, control module 9 is interpreted as it must be with the visual indication of anti-fake mark.For making anti-fake mark visual, it is in time T
4Open light emitting diode 8.Light emitting diode 8 is opened to T always
5Time, it is closed then, and cycle repeats is from T
6Begin again.If do not reach predetermined threshold value, then LED is at T
4-T
5The interval is closed.
LED open-interval length only is slightly less than cycle T
0-T
6Time, this has realized sufficiently high brightness at the B point, can let the operator see clearly.When light emitting diode 8 irradiations, photodetector 7 is issued to saturated at the light of light emitting diode 8 from the effect that paper surface reflects.T
5-T
6Be to be that photodetector 7 breaks away from the state of saturation time necessary at interval.At T
3-T
4The interval in, the response of photodetector 7 is because the process that continues of twilight sunset and slack-off relatively.The process of twilight sunset in most of the cases, can be described to the constant time of twilight sunset be the decay of the intensity index of characteristic.If prolongation interval T
3-T
4, and the extra tolerance of adding photodetector 7 response therein then by the relation between the meaning of two photodetectors collecting 7 responses, and time interval length between two tolerance, can calculate the constant time of twilight sunset.The meaning of the constant time of twilight sunset can be by visual, such as, if serve as light emitting diode 8 with the LED lamp of multiple variable color.The different time constant value can be encoded with different colours.This method can provide a more rough result, but can make us can distinguish the various fluorophor that the constant temporal meaning of twilight sunset differs widely.
Fig. 3 is for detecting the synoptic diagram of the pattern of finding infrared markers.The irradiation of light emitting diode 8 is visual with file 1 surface this phenomenon of disappearance infrared Absorption.If it is visible coat of colo(u)r that the operator observes the hot spot of differentiating district 3, that just means that coat of colo(u)r is an infrared transparent.Initial time T '
0Laser 5 is closed with light emitting diode 8, and photodetector 7 is only injected exterior light.The Ud size of this response is stored, the pattern of similar discovery anti-Stokes mark.
At time interval T '
1-T '
2Laser 5 of short duration unlatchings.This section ratio of pulse length to the total cycle length T
1-T
2Pulse shorten greatly, so photodetector 7 can't get into state of saturation.The Um response of photodetector 7 is at T '
2To shine its amount proportional with laser 5 in time, thereby differentiate that with file 1 surface the reflection coefficient of district 3 in infrared band is proportional.The irradiation of anti-Stokes fluorescence mark if mark present discriminating district 3, can influence the meaning of Um hardly, because the duration of pulse of laser 5 is very short, exposure intensity is very little.If size (Um-Ud) surpasses predetermined threshold value in advance, control module 9 is interpreted as paper surface with it and lacks the systemic sign of infrared band.Visual, it time T '
3Open light emitting diode 8.Light emitting diode 8 is held open, until time T '
4, then, from T '
5Begin this circulation of repetition.If do not reach certain threshold value, then light emitting diode 8 is at interval T '
3-T '
4Keep shut.
In order further to improve information content, the average intensity of illumination of secondary light source can be according to the responsiveness decision of photodetector 7.Luminous mean intensity is through changing the length T at the luminous interval of LED lamp
4-T
5(or T '
3-T '
4), do not change simultaneously the cycle period decision.For example, interval time, length can be set at size (Um-Ud) proportional.This makes the operator not only can see the response of mark, also can estimate its intensity.
Claims (16)
1. a device that is used for the display file anti-fake mark is characterized in that, comprising:
First light source, it differentiates go luminous in order to obtain file, makes the anti-fake mark in said discriminating district under the effect of light, demonstrate hidden optical properties;
Optical receiver, it is converted into electric signal in order to the light signal that will come from said discriminating district;
Secondary light source, it is in order to handle visible light, obtains discriminating district luminous of said file; And
Analytical equipment comes from the light of said secondary light source in order to analysis and Control, and informs that user's relevant document discriminating district is by the optical properties of the anti-fake mark of hiding.
2. device as claimed in claim 1 is characterized in that, said first light source is accomplished in pulse mode.
3. according to claim 1 or claim 2 device is characterized in that, the light that in the said device file is sent is transmitted to the optical channel of said optical receiver and comprises a common zone at least with the optical channel that said secondary light source is transmitted to file.
4. device as claimed in claim 3 is characterized in that the common region of said optical channel comprises the optical system that has the positive luminous power.
5. like claim 1,2, one of 4 described devices, it is characterized in that said secondary light source can be opened according to the characteristic of said anti-fake mark in given periodic sequence.
6. device as claimed in claim 3 is characterized in that, said secondary light source can be opened in given periodic sequence according to the characteristic of anti-fake mark.
7. like claim 1,2, one of 4 described devices, it is characterized in that said secondary light source can the luminous color of conversion.
8. device as claimed in claim 3 is characterized in that, said secondary light source can the luminous color of conversion.
9. like claim 1,2, one of 4 described devices, it is characterized in that said secondary light source can generate a visible form at said paper surface.
10. device as claimed in claim 3 is characterized in that, said secondary light source can form visible form at said paper surface.
11. device as claimed in claim 9 is characterized in that, said visible form comprises mark.
12. device as claimed in claim 10 is characterized in that, said visible form comprises mark.
13. device as claimed in claim 9 is characterized in that, said visible form comprises information indicating.
14. device as claimed in claim 10 is characterized in that, said visible form comprises information indicating.
15. device as claimed in claim 9 is characterized in that, said optical receiver is a multielement, and said secondary light source is reflected at the distribution of anti-fake mark physics amount in the said discriminating district with the distribution of the intensity in said discriminating district.
16. device as claimed in claim 9 is characterized in that, said optical receiver is a multielement, and said secondary light source is reflected at the distribution of anti-fake mark physics amount in the said discriminating district with the distribution of the intensity in said discriminating district.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2011103958/08A RU2444064C1 (en) | 2011-02-04 | 2011-02-04 | Device for viewing security marks on document |
| RU2011103958 | 2011-02-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102324131A true CN102324131A (en) | 2012-01-18 |
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ID=45451870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102669859A Pending CN102324131A (en) | 2011-02-04 | 2011-09-09 | Device for displaying file anti-counterfeiting mark |
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| Country | Link |
|---|---|
| CN (1) | CN102324131A (en) |
| RU (1) | RU2444064C1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126105A (en) * | 2019-05-17 | 2019-08-16 | 深圳市家家用激光设备有限公司 | A kind of projection crystal production production method |
| CN110830691A (en) * | 2019-10-30 | 2020-02-21 | 四川金鹏宏达实业有限公司 | Novel ultraviolet anti-counterfeiting equipment |
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| CA2375577A1 (en) * | 2002-03-07 | 2003-09-07 | Canadian Bank Note Company, Limited | Optoelectronic document reader for reading uv / ir visible indicia |
| CN1950857A (en) * | 2004-03-09 | 2007-04-18 | 科学和工业研究理事会 | Improved fake currency detector using visual and reflective spectral response |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110126105A (en) * | 2019-05-17 | 2019-08-16 | 深圳市家家用激光设备有限公司 | A kind of projection crystal production production method |
| CN110126105B (en) * | 2019-05-17 | 2021-01-12 | 深圳市家家用激光设备有限公司 | Production and manufacturing method of projection crystal |
| CN110830691A (en) * | 2019-10-30 | 2020-02-21 | 四川金鹏宏达实业有限公司 | Novel ultraviolet anti-counterfeiting equipment |
| CN110830691B (en) * | 2019-10-30 | 2021-04-13 | 四川金鹏宏达实业有限公司 | Novel ultraviolet anti-counterfeiting equipment |
Also Published As
| Publication number | Publication date |
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| RU2444064C1 (en) | 2012-02-27 |
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