CN102478515A - Detection method for laser anti-counterfeiting material based on color coding - Google Patents
Detection method for laser anti-counterfeiting material based on color coding Download PDFInfo
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- CN102478515A CN102478515A CN2010105629702A CN201010562970A CN102478515A CN 102478515 A CN102478515 A CN 102478515A CN 2010105629702 A CN2010105629702 A CN 2010105629702A CN 201010562970 A CN201010562970 A CN 201010562970A CN 102478515 A CN102478515 A CN 102478515A
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Abstract
The invention provides a detection method for a laser anti-counterfeiting material based on color coding. The anti-counterfeiting material contains luminescent materials which can emit visible light under the excitation of near infrared laser. Through doping of different kinds of the luminescent materials according to different concentration ratios in preparation of the anti-counterfeiting material, the relative intensity of three basic color areas of visible light emitted by the anti-counterfeiting material can be controlled. According to the invention, a detection apparatus is used for programming and coding of different colors emitted by a substrate coated with the anti-counterfeiting material according to difference of intensity of three colors; a color sensing receiver is used for examination and can detect an anti-counterfeiting code of an anti-counterfeiting mark in a carrier. The detection apparatus is simple, portable, practicable and intelligentized, produces accurate detection results and has a good anti-counterfeiting detection function.
Description
Technical field:
The present invention relates to a kind of anti-forgery ink material and plastic material of color-coded laser antifalsification technology, particularly a kind of many colors, and such anti-fake material is carried out the device of code detection.
Background technology:
The luminous false proof mode of using at present generally all is to obtain visible light through the ultraviolet light deexcitation, and ultraviolet ray is bigger to the harm of human body.And depend on human eye and the rough judgement of color is merely able to tell several kinds photochromicly comes the diversity of having limited to anti-fake material so greatly.To a multiple series products of manufacturer, multiple batches of false proof be far from being enough.Such luminescent material is easy to buy abroad, also therefore is easy to copied.Like patent CN 1422912A " Light-emitting Anti-counterfeiting Ink And Preparation Method And Use "; A kind of preparation method that can under excited by visible light, launch the anti-forgery ink of another kind of visible light is disclosed; What its main excitation source adopted is visible light, excites the disguised bad of light pipe.The infrared light supply of 800nm-1000nm is the light source that human eye can't see.The discernmible visible light of naked eyes has still limited to false proof diversity.Exist false proof mode single, be prone to shortcomings such as forgery.
Patent CN1415693A, CN1185475A, CN1277351A has just reported the synthetic of infrared ray excited up-conversion and has been used for anti-counterfeiting technology among CN1183552A and the CN1280153A, do not propose several kinds of combinations and carry out Application in Anti-counterfeiting.And be not mentioned to relevant detection instrument and encode false-proof.
Detection method and the pick-up unit of having mentioned infrared up-conversion material among the patent CN1397795A are arranged again; The number of the detector of pick-up unit is to follow the color region of the emission of luminescent material that substantial connection is arranged in this patent; As survey three detectors of three kinds of photochromic just needs, strengthened the complicacy and the cost of instrument.And the pick-up unit that relates among the present invention only needs a detector that blend color is directly detected; Can realize a plurality of mixed color light; And the detection of different emission relative intensity numerical value, through logical circuit and algorithm programming, form or formulate specific coding.This anti-counterfeiting detection mode is versatile and flexible, and security code does not repeat, the difficult forgery, and practice thrift cost, simple to operate, intelligent more.
Though anti-fake material of the present invention relatively easily obtains on market; But pass through the combination of different luminescent materials and the different content in anti-fake material; Exciting the descendant through infrared laser is blue light in the control anti-fake material emission light; The luminous relative light intensity of green glow and ruddiness is encoded above-mentioned three light and is carried out false proofly, has improved false proof performance greatly and has been not easy to forge.Luminescent material of the present invention is not only that up-conversion luminescent material has also comprised some long after glow luminous material.Long-afterglow material can absorb visible light and in the dark send specific color; Make us can carry out preliminary qualitative checking; And then the up-conversion in the anti-fake material is carried out quantitative Coded Analysis through the pick-up unit among the present invention, can improve anti-counterfeiting performance greatly.
Anti-fake material of the present invention not only is applied in the product that can also be used in some plastic matrixs in the printing ink.Widened the practical field of anti-fake product.
Advantages such as the present invention can also carry out dual wavelength and excites check in addition, improves false proof level, and it is versatile and flexible that this method has false proof mode, and pick-up unit is simple, be easy to carry, and detects rapidly, and the result is accurate, and antifalse effect is good.
Summary of the invention:
The purpose of this invention is to provide a kind of antifalse mode; It is under the exciting of near-infrared laser, to launch visible light through luminescent material in checking security printing ink and the plastic products; To the blue light in the visible light, the color of green glow and ruddiness is encoded, and discerns the false from the genuine.
The technical matters that the present invention will solve is: up-conversion luminescent material and part long-afterglow material are carried out proportioning according to certain mass be mixed with into anti-forgery ink or false proof plastic products.Be controlled under the infrared light laser excitation, to emission light blue light, green glow and ruddiness relative light intensity carry out numerical coding.
Technical scheme of the present invention:
Different luminescent materials is mixed with out anti-fake material according to certain kind and content and printing ink coupling agent or plastic matrix material.The pick-up unit that re-uses among the present invention is gathered the visible light that emits of anti-fake material, and to the blue light in the emission light, green glow and ruddiness relative light intensity carry out digital coding through the algorithm programming, forms the various colors coding.
The anti-fake material of mentioning among the present invention is for can being that the near-infrared laser of 800-1000nm excites down by wavelength; Launch the luminescent material of visible light; With above-mentioned luminescent material one or more according to specific ratio mixing; And according to the ratio of 20-50% row and ink material, plastic resin material is carried out mixed anti-fake material, with the anti-fake material spraying or be printed onto on the substrate surface.Luminescent material is characterized in that being that the near-infrared laser of 800-1000nm excites down by wavelength; Launch the luminescent material of visible light; Mainly be doped rare earth erbium (Er), thulium (Tm), ytterbium (Yb), holmium oxysulfides such as (Ho), fluoride, up-conversion luminescent materials such as oxide; And the aluminate of europium doped (Eu), dysprosium (Dy), long persistence luminescent silicate material.
Various luminescent materials are divided into the material (400-480nm) of blue emission; Material three basic colors such as (590-660nm) of material of green emission (490-540nm) and red emission, and select a kind of according to different proportion these or more than one the luminescent material of different colours carries out mixing match.
The luminescent material that combinations thereof is come out mixes with ink material, dispersion, rolling forming.Again with its spraying or be printed onto paper, glass, pottery, metal, on the plastic base surface as the false proof marking.
Can also the luminescent material that combination is come out be mixed with plastic resin material in addition, disperse, with injector injection molded in grinding tool.Directly apply to difform plastics anti-counterfeiting product.
Color password check aspect is used to detect color-coded receiver and is made up of color sensor, convergent lens, signal processing circuit.Utilize the laser excitation anti-fake material of 800-1000nm wave band, visible emitting, color sensor receives the emission light of anti-fake material through convergent lens.Color sensor detects ruddiness, green glow, the blue light Essential colour composition in the emission light; Convert colouring information into numerical information, and then definite ruddiness, green glow, the basic colour of blue light, one group of color coding formed; The processing of digital signal can be used single-chip microcomputer, but preferably adopts fpga chip.The color coding that the doping of anti-fake material prepares concentration and detection has one-to-one relationship.
Advantage of the present invention:
1, not only can variety classes and content through luminescent material mix, the radiative color coding of control anti-fake material also can carry out false proofly through the algorithm programming of logical circuit in the receiver or security code, improves its anti-counterfeiting performance.
2, security code does not repeat, the difficult forgery, and antifalse effect is good, and false proofly has a diversity.
3, simple, color testing accuracy of receiver architecture and efficient are high.
4, can carry out dual wavelength and excite check, improve false proof level, false proof mode is versatile and flexible.
Description of drawings:
Fig. 1 structural representation of the present invention, color coding laser anti-counterfeit detection system: 1, the infrared laser light source of 800-1000nm; 2, receiving trap; 3, beam expanding lens; 4, convergent lens; 5, carrier; 6, the marking; 7, light shield
The practical implementation method:
The preparation of three kinds of color ink anti-fake materials of embodiment 1-3
Embodiment 1, the doping ytterbium that will buy on the market and the oxysulfide of thulium, its chemical molecular formula is Y
2O
2S:Yb, Tm take out 50g and mix stirring with 50g polyurethane oil ink connecting material mixed material, and be rolling on three rolling printing ink machines, prepares screen printing ink.This printing ink marking can be excited by infrared light 800-1000nm and send blue light.Emission spectrogram on spectrometer is the spectrogram of the embodiment one among the figure one.
Embodiment 2, the doping ytterbium that will buy on the market and the oxysulfide of erbium, its chemical molecular formula is Y
2O
2S:Yb, Er take out 50g and mix stirring with 50g polyurethane oil ink connecting material mixed material, and be rolling on three rolling printing ink machines, prepares screen printing ink.This printing ink marking can be excited by infrared light 800-1000nm and send green glow.Emission spectrogram on spectrometer is the spectrogram of the embodiment two among the figure one.
Embodiment 3, the doping ytterbium that will buy on the market and the oxysulfide of holmium, its chemical molecular formula is La
2O
2S:Yb, Ho take out 50g and mix stirring with 50g polyurethane oil ink connecting material mixed material, and be rolling on three rolling printing ink machines, prepares screen printing ink.This printing ink marking can be excited by infrared light 800-1000nm and send ruddiness.Emission spectrogram on spectrometer is the spectrogram of the embodiment three among the figure one.
The detection system of embodiment 4, anti-fake material
Be used to discern false proof detection system and see Fig. 1.Comprise exciting, be used to produce near-infrared band laser with laser instrument (1); Exciting light increases the irradiated area on anti-fake material through the effect of (3); Receiving trap (2) receives the emission light of anti-fake material through convergent lens (4); The convergent lens effect is an emission light of concentrating anti-fake material; Improve the antijamming capability of receiving trap, color sensor detects the red, green, blue primary color component in the emission light again, converts colouring information into numerical information; And then the basic colour of definite red, green, blue, form one group of color coding.
Claims (8)
1. detection method based on color-coded laser anti-counterfeit material; It is characterized in that anti-fake material wherein for being that the near-infrared laser of 800-1000nm excites by wavelength, launches the luminescent material of visible light, with above-mentioned luminescent material one or more according to specific ratio mixing; And according to the ratio of 20-50% row and ink material; Plastic resin material is carried out the mixed anti-fake material that gets, and the anti-fake material spraying perhaps is printed onto on the substrate surface, adopts detecting instrument to carry out specific coding at last and sorts out; Pick-up unit adopts a detector; Survey the different colours light in the anti-fake material, adopt fpga chip that digital signal is handled and form one group of color coding, the color coding that the doping of anti-fake material prepares concentration and detection has one-to-one relationship.
2. the detection method described in claim 1; It is characterized in that luminescent material mainly is the oxysulfide of doped rare earth erbium (Er), thulium (Tm), ytterbium (Yb), holmium (Ho); Fluoride; Oxide up-conversion luminescent material, and the aluminate of europium doped (Eu), dysprosium (Dy), long persistence luminescent silicate material.
3. the detection method described in claim 2; It is characterized in that; The material that various described luminescent materials is divided into blue emission; Three basic colors of the material of green emission and the material of red emission, and select a kind of or more than one the luminescent material of different colours carries out mixing match according to different proportion.
4. like each described detection method among the claim 1-3, it is characterized in that: after a kind of specific luminescent materials of or more than one colors mix, mix with ink material again, dispersion, rolling forming.
5. like each described detection method among the claim 1-3,, it is characterized in that the purposes of said anti-fake material is for spraying or be printed onto paper, glass, pottery, metal, on the plastic base surface as the false proof marking.
6. the detection method described in claim 1; It is characterized in that; The preparation of described anti-fake material is after the specific luminescent material with a kind of or more than one color regions mixes, and mixes with plastic resin material, disperses, with injector injection molded in grinding tool.
7. the detection method described in claim 6 is characterized in that described anti-fake material, is injection molded into difform false proof plastic products according to different moulds.
8. like claim 1-3, each described detection method is characterized in that among the 6-7; The pick-up unit of implementing this detection method comprises receiver, and receiver comprises convergent lens, sensor; Signal Processing, the algorithm programming of security code is checked out corresponding security code through this pick-up unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010562970.2A CN102478515B (en) | 2010-11-29 | 2010-11-29 | Detection method for laser anti-counterfeiting material based on color coding |
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| CN201010562970.2A CN102478515B (en) | 2010-11-29 | 2010-11-29 | Detection method for laser anti-counterfeiting material based on color coding |
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| CN102478515A true CN102478515A (en) | 2012-05-30 |
| CN102478515B CN102478515B (en) | 2014-01-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661937A (en) * | 2012-06-04 | 2012-09-12 | 广东恒立信息科技有限公司 | Anti-counterfeiting detection device and detection method thereof |
| CN105404916A (en) * | 2015-12-19 | 2016-03-16 | 中国工程物理研究院电子工程研究所 | Novel anti-snooping luminous warning optical PUF |
| CN106978181A (en) * | 2017-05-14 | 2017-07-25 | 复旦大学 | The orthogonal fluorescence-encoded anti-fake material of long afterglow is changed in a kind of near infrared light charging |
| CN107436294A (en) * | 2016-05-26 | 2017-12-05 | 镇江索乐电子科技有限公司 | A kind of quick liquid sediment Color Detecting System and its detection method |
| CN110628434A (en) * | 2018-06-21 | 2019-12-31 | 首都师范大学 | Application of near-infrared luminescent material in coding |
| CN115893847A (en) * | 2022-10-25 | 2023-04-04 | 福建江夏学院 | Multimode fluorescent microcrystalline glass and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102661937A (en) * | 2012-06-04 | 2012-09-12 | 广东恒立信息科技有限公司 | Anti-counterfeiting detection device and detection method thereof |
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| CN106978181A (en) * | 2017-05-14 | 2017-07-25 | 复旦大学 | The orthogonal fluorescence-encoded anti-fake material of long afterglow is changed in a kind of near infrared light charging |
| CN110628434A (en) * | 2018-06-21 | 2019-12-31 | 首都师范大学 | Application of near-infrared luminescent material in coding |
| CN115893847A (en) * | 2022-10-25 | 2023-04-04 | 福建江夏学院 | Multimode fluorescent microcrystalline glass and preparation and application thereof |
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| CN102478515B (en) | 2014-01-22 |
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