CN113607699A - Luminescent product, authenticity detection method and system, anti-counterfeiting element and anti-counterfeiting article - Google Patents
Luminescent product, authenticity detection method and system, anti-counterfeiting element and anti-counterfeiting article Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7776—Vanadates; Chromates; Molybdates; Tungstates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7777—Phosphates
Abstract
The invention provides a luminescent product, a method and a system for detecting authenticity, an anti-counterfeiting element and an anti-counterfeiting article. The authenticity detection method of the luminescent product comprises the following steps: illuminating the light-emitting article with excitation light such that the light-emitting article produces emission light; detecting an intensity of first emission light generated by the light emitting article at a first time; detecting an intensity of a second emission light produced by the light-emitting article at a second time; the method can judge the authenticity of the product by comparing the intensity of the emitted light generated after the light-emitting product is irradiated by the exciting light and changing a function along with time, replaces the traditional method of detecting the intensity of the emitted light by a detector to judge the authenticity, has strong concealment, and is not easy to be found and imitated by a counterfeiter.
Description
Technical Field
The application belongs to the technical field of luminescent materials, and particularly relates to a luminescent product, a method and a system for detecting authenticity of the luminescent product, an anti-counterfeiting element and an anti-counterfeiting article.
Background
The phosphor composition generally includes at least a host and a dopant or emissive particle that, upon receiving an external energy stimulus, emits a spectrum in the visible, infrared or ultraviolet range, and thus, the phosphor can be added to an article as an anti-counterfeiting material to ensure that the product is authentic.
In the prior art, a common identification method is to receive electromagnetic radiation from a luminescent product to enable the luminescent product to generate emitted light with a certain wavelength, and then detect whether the luminescent product is a genuine product through a detector.
Disclosure of Invention
The present invention is directed to solving or improving at least one of the above technical problems.
According to a first aspect of the present invention, a method for detecting authenticity of a light-emitting product is provided.
According to a second aspect of the present invention, there is provided a light-emitting article.
According to a third aspect of the present invention, there is provided a security element.
According to a fourth aspect of the present invention, there is provided an anti-counterfeit article.
According to a fifth aspect of the present invention, there is provided a system for detecting authenticity of a light-emitting product.
A sixth aspect of the present invention provides an electronic device.
A seventh aspect of the present invention provides a computer-readable storage medium.
According to the technical scheme of the first aspect of the invention, the authenticity detection method of the light-emitting product comprises the following steps:
illuminating the light-emitting article with excitation light such that the light-emitting article produces emission light;
detecting an intensity of first emission light generated by the light emitting article at a first time;
detecting an intensity of a second emission light produced by the light-emitting article at a second time;
the intensity of the first emitted light and the intensity of the second emitted light are compared, and whether the light-emitting article is authentic is determined according to the intensity comparison result.
The authenticity detection method of the light-emitting product is used for detecting authenticity of the light-emitting product such as the anti-counterfeiting element, and during detection, the light-emitting product is continuously irradiated by exciting light to enable the light-emitting product to generate emitting light. After that, the intensity of the emitted light generated by the light-emitting product can be detected at the two nodes of the first time and the second time, and the authenticity judgment can be carried out according to the intensity magnitude relation. The method can judge the authenticity of the product by comparing the intensity change of the emitted light generated after the luminescent product is irradiated by the exciting light, replaces the traditional method for judging the authenticity by detecting the intensity of the emitted light by a detector, and the method for judging the authenticity by the intensity of the emitted light is very common and is very easy to find, so the scheme has strong concealment and is not easy to find and imitate by counterfeiters.
The phosphor composition typically includes at least a host and dopant or emissive particles that emit in the visible, infrared, or ultraviolet range upon stimulation by external energy. It has been found that, in general, the intensity of the emitted light from the luminescent material decays exponentially after removal of the external energy.
Thus, the properties of the luminescent material can be characterized by intensity or intensity decay time in addition to the excitation wavelength and emission wavelength. Therefore, the luminous intensity and the luminous intensity decay time are important characteristics of the luminescent material and can be used as important parameters for machine-readable anti-counterfeiting.
The present application has invented a method for determining authenticity by detecting a change in intensity of emitted light in the present application based on the above findings.
In the above technical solution, the step of determining whether the light-emitting product is authentic according to the intensity comparison result specifically includes: and judging whether the light-emitting product is true or not according to the intensity comparison result and the intensity function of the light-emitting product.
In this embodiment, the intensity function is a function of the intensity of the light-emitting material as a function of time as the irradiation time of the excitation light increases, and the intensity function of the emitted light generated under the irradiation of the excitation light also varies according to the material of the light-emitting article, for example, the intensity function of the emitted light includes at least one of a monotone increasing function, a monotone decreasing function, or a function of increasing and decreasing singly or a combination thereof. Generally, after the light-emitting product is irradiated by any light source and then the power supply is turned off, the light-emitting intensity generally gradually decreases, and the intensity function of the emitted light is a monotone decreasing function. When a certain pulse light source is used for illumination, the luminous intensity may also show exponential increase, in this case, a limit value is generated in the increasing process, and the luminous intensity does not increase infinitely, and the intensity function of the emitted light is a monotone increasing function. Of course, depending on the composition of the materials, the intensity may decrease after increasing to some extent after irradiation with a pulsed light source, or the intensity may decrease after turning off the light source after increasing to some extent after irradiation with a pulsed light source, so that the intensity function of the emitted light in this case is an increasing and decreasing function. In addition, the intensity function of the emitted light may be a combination of two arbitrary functions, i.e., a monotone increasing function, a monotone decreasing function, and a first increasing and then decreasing function, or may be a combination of three functions, depending on the irradiation light source, the composition of the light-emitting article, and the irradiation mode. In this embodiment, when determining whether the light-emitting product is true according to the intensity comparison result, the intensity function of the emitted light of the light-emitting product may be obtained first, so that the intensity of the emitted light of the light-emitting product at different times can be determined according to the intensity function of the emitted light. And with this as a reference, determining whether the detected intensities of the emitted light at the first and second times meet the requirements of an intensity function of the emitted light from the light-emitting article. If the light-emitting product is not matched, the light-emitting product is judged to be false. For example, if the intensity function of the emitted light of a certain light-emitting product to be detected is a monotone increasing function, when it is required to detect whether the light-emitting product is true, the exciting light is firstly emitted to the light-emitting product, the light-emitting product is irradiated by the exciting light, so that the first emitted light intensity can be generated at a first time, when the time for continuously irradiating the light-emitting product by the exciting light is prolonged from the first time to a second time, the light-emitting product can generate a second emitted light intensity at the second time, and the first emitted light intensity and the second emitted light intensity are compared. If the first emission light intensity is less than or equal to the second emission light intensity, it is indicated that the intensity of the emission light generated by the light-emitting product is not proportional to the irradiation time of the excitation light, that is, the intensity of the emission light does not increase with the change of the irradiation time of the excitation light, and that the light-emitting product is false. Conversely, when it is determined that the intensity of the emitted light produced by the light-emitting article is a monotonically decreasing function of the irradiation time of the excitation light, the light-emitting article is indicated as true if the measured first emission light intensity is greater than the second emission light intensity, and the light-emitting article is indicated as false if the measured first emission light intensity is less than or equal to the second emission light intensity. Therefore, when the authenticity of the light-emitting product to be distinguished is judged, the relation between the intensity function of the light-emitting product and the intensity of the first emitted light and the intensity of the second emitted light detected by the scheme is only needed to be judged. Thus, the authenticity judgment of different types of luminous products can be realized.
In the above technical solution, the time difference between the second time and the first time is greater than or equal to 10-5The second is 0.2 seconds or less.
In the technical scheme, when the authenticity is detected through the intensity of two time points, the time difference between the second time and the first time is not too large, and the time difference between the second time and the first time is more than or equal to 10-5The second is preferably less than or equal to 0.2 second, so that the problem that the measurement is interfered by certain interference factors which may interfere with the measurement result in the detection process due to overlarge interval between the second time and the first time can be avoided, for example, in the detection process, the measurement of the intensity of the second emission light is inaccurate due to the change of the irradiation intensity of the excitation light, the change of the irradiation wavelength of the excitation light and the like, and the accuracy is further influenced.
In the above technical solution, the intensity of the third emitted light generated by the light-emitting article at the third time is detected, the intensity of the second emitted light is compared with the intensity of the third emitted light, and whether the light-emitting article is true or not is determined according to the intensity comparison result, wherein the third time is after the second time.
In the technical scheme, the detection accuracy can be further improved by detecting the intensity of the third emitted light generated by the light-emitting product at the third time and comparing the intensity of the second emitted light with the intensity of the third emitted light, so that the judgment error caused by the measurement error when the first intensity or the second intensity is measured can be avoided. In addition, the technical scheme further expands the range of the detected light-emitting products, for example, the intensity function of some light-emitting products is not limited to a common monotone increasing or monotone decreasing function, the irregular intensity function generated by some light-emitting products is, for example, the light-emitting products generate an intensity of emitted light which is in a relation of monotone increasing and then monotone decreasing with the irradiation time of the exciting light, the function relation of the intensity of the emitted light and the irradiation time of the exciting light is proved by the intensity of the second emitted light and the intensity of the first emitted light, the function relation of the intensity of the emitted light and the irradiation time of the exciting light is proved by the intensity of the second emitted light and the intensity of the third emitted light, and the function relation of the intensity of the emitted light and the irradiation time of the exciting light are proved by monotone increasing and then decreasing, and further the function relation of the light-emitting products generate the emitted light and the irradiation time of the exciting light are proved by monotone increasing, and decreasing, Then, the relationship of monotonous decrease is formed, and the authenticity of the luminous product is judged.
In the above technical solution, the excitation light is a non-pulsed light source or a light source with a preset pulse period.
In the technical scheme, a non-pulse light source can be selected as the excitation light, continuous irradiation light can be generated on the light-emitting product, the light-emitting product can continuously generate the emission light, and further, a light source with a preset pulse period can be selected as the excitation light.
In the above technical solution, the wavelength of the excitation light is 200 nm or more and 2000 nm or less.
In the technical scheme, the wavelength of the exciting light is more than or equal to 200 nanometers and less than or equal to 2000 nanometers, and further more, more than or equal to 200 nanometers and less than or equal to 1500 nanometers. The wavelength of the excitation light can be 365 nm, 808 nm, 980 nm, 1500 nm, etc., and the intensity of the light emitted by the light-emitting product can be further improved under the irradiation of the excitation light with the wavelength.
In the above-described technical solution, when the light-emitting article is irradiated with the excitation light, the illuminance of the excitation light is a fixed value.
In this technical scheme, the illuminance of exciting light is the fixed value, can avoid illuminance's change and influence measuring result, has further improved the accurate rate through the true and false of intensity detection.
In the above-mentioned solution, the wavelength range of the first emitted light overlaps or at least partially overlaps with the wavelength range of the second emitted light.
In the technical scheme, the selection of the first time and the second time can be randomly selected in principle, but in order to ensure the accuracy of measurement, certain limitation can be performed on two time nodes. For example, when the first time and the second time are selected, two times that the wavelength range of the first emitting light overlaps or at least partially overlaps with the wavelength range of the second emitting light are preferably selected, so that the situation that misjudgment or intensity detection cannot be performed due to improper selection of the first time and the second time is avoided, and the accuracy of anti-counterfeiting detection is further improved.
In a second aspect of the present invention, there is provided a luminescent article, which is made of a luminescent material, the luminescent material including: having WrXmOn：Lip，ZqComponent of the formula WrXmOn：Lip，ZqW in the general formula is selected from one or a combination of more of yttrium element, lanthanum element and ytterbium element, X is selected from one or a combination of more of phosphorus element, molybdenum element and aluminum element, O is oxygen element, Li is lithium element, and Z is selected from one or a combination of more of erbium element, thulium element and holmium element; r is one or more of yttrium element, lanthanum element and ytterbium element, m is the mole fraction of one or more of phosphorus element, molybdenum element and aluminum element, n is the mole fraction of oxygen element, n is not equal to 0, p is the mole fraction of lithium element, q is the mole fraction of one or more of erbium element, thulium element and holmium element, wherein r is the mole fraction of one or more of yttrium element, lanthanum element and ytterbium element, m is the mole fraction of one or more of phosphorus element, molybdenum element and aluminum element, n is the mole fraction of oxygen element, n is not equal to 0, p is the mole fraction of lithium element, q is the mole fraction of one or more of erbium element, thulium element and holmium element, and p is not equal to 0.
Wherein, in the present application, WrXmOn：Lip，ZqIn the general formula, the following are represented: r mole fraction of element W, m mole fraction of element X, n mole fraction of element oxygen, p mole fraction of element lithium, and q mole fraction of element Z. That is, the subscripts of the respective elements in the above formula indicate the molar proportions of the respective elements.
Wherein, WrXmOnIt is only indicated to include a combination of W, X and O, which may coexist in the same substance, and of course, these three elements may also coexist in two substances, and of course, these three elements may also be provided by a plurality of substances, and therefore, the sources and forms of W, X and O are not limited as long as the molar ratios of these three elements satisfy the corresponding requirements.
According to the present invention there is provided a light emitting article wherein WrXmOnThe method is characterized in that Li element is added into the existing luminescent material composition, and the addition of the Li element can obviously improve the luminous intensity of the base material under the same excitation condition, and improve the feasibility and the accuracy of the detection method. That is this application has improved the luminous intensity of luminescent product through adding Li element for the true and false judgement that carries out luminescent material through intensity variation becomes easier to realize, can not lead to detecting the failure because of luminous intensity is not enough. In addition, the sintering temperature of the luminescent material in the preparation process can be obviously reduced by adding the Li element, so that the energy is saved, and particularly, the sintering temperature of the existing luminescent material is generally required to be about 1200-1500 ℃ in the preparation process, while the sintering temperature is only required to be about 900-1200 ℃ after the components and the content of the auxiliary agent are changed and the Li element is added into the matrix, so that the sintering temperature is reduced by about 300 ℃. The reaction temperature is reduced, so that the energy consumption is saved, the temperature rise and fall time is correspondingly shortened, the time is saved, and the production period is shortened. Third, generally speaking, in the sintering experiment performed at 1000 ℃ or higher, the requirements for the heating device of the high temperature furnace and the crucible are obviously increased, so that the reaction temperature is reduced to 1000 ℃ or lower, and the requirements for the adopted high temperature furnace equipment and sintering vessels such as the crucible are correspondingly reduced. And fourthly, the consumption of consumables such as a crucible can be reduced. The preferred starting material for Li may be Li2CO3、LiNO3And the like.
In the above technical scheme, the mole fraction p of lithium is 0.001 to 0.3, the value of r is between 0 and 5, m is 1 to 5, p ≠ 0, and q is 0.0011 to 0.1.
In the technical scheme, the molar ratio of the elements is limited, so that a stable structure can be formed by the matrix and the doped ions, and the luminescent material with excellent comprehensive performance is obtained, and the later application is facilitated. In addition, the luminous efficiency and luminous intensity of the luminous product can be further improved.
In the above technical scheme, the raw material of the luminescent material in the synthesis process further comprises an auxiliary agent, wherein the auxiliary agent is one or a combination of more of boric acid, bismuth trioxide and zinc oxide.
In the technical scheme, the luminous intensity of the prepared luminous product can be obviously improved under the conditions of not influencing the luminous wavelength and the attenuation rate by adding the auxiliary agent, and the later detection is facilitated.
According to a third aspect of the invention, there is provided a security element comprising a luminescent article according to any one of the second aspects of the invention.
The anti-counterfeiting element provided by the invention can be any one of anti-counterfeiting ink, anti-counterfeiting fiber, anti-counterfeiting thread, anti-counterfeiting base material or anti-counterfeiting label, and the anti-counterfeiting element comprises the luminescent product provided by any one of the technical schemes of the second aspect of the invention, so that the anti-counterfeiting element has all the beneficial effects of the luminescent product provided by any one of the technical schemes of the second aspect of the invention, and is not repeated herein.
The technical scheme of the fourth aspect of the invention provides an anti-counterfeiting article, which comprises the luminescent product provided by any one of the technical schemes of the second aspect of the invention.
The anti-counterfeiting article provided by the invention can be a luminescent material, a valuable document, a certificate, a bill, a package or the like, and the anti-counterfeiting article comprises the luminescent product of any technical scheme of the second aspect of the invention, so that the anti-counterfeiting article in the application has all the beneficial effects of the luminescent product provided by any technical scheme of the second aspect of the invention.
The technical scheme of the fifth aspect of the invention provides a authenticity detection system for a light-emitting product, which comprises: an excitation light for illuminating the light emitting article;
the detection device is used for detecting the intensity of emitted light generated when the light-emitting product is irradiated by the exciting light; a processing unit comprising a storage and a processor, the storage having stored thereon the detection method according to any of the aspects of the first aspect of the present application when the computer program is executed by the processor.
The authenticity detection system for the light-emitting product comprises an excitation light, a detection device and a processing unit, wherein the excitation light is used for irradiating the light-emitting product, the detection device is used for detecting the intensity of emitted light generated when the light-emitting product is irradiated by the excitation light, the processing unit comprises a storage and a processor, a computer program is stored in the storage, and the processor executes the program to realize the detection method of any technical scheme in the first aspect of the application, so that the authenticity of the anti-counterfeiting product can be quickly detected by the system. Meanwhile, the authenticity detection system for the light-emitting product can execute the detection method of any technical scheme of the first aspect of the application, so that the authenticity detection system for the light-emitting product provided by the invention has all the beneficial effects of the detection method provided by any technical scheme of the first aspect of the invention.
The technical solution of the sixth aspect of the present invention provides an electronic device, which includes a storage and a processor, where the storage stores a computer program, and the processor implements the detection method according to any aspect of the first aspect of the present application when executing the computer program.
In the electronic device provided by the present invention, the computer program capable of executing the method for detecting authenticity of a light-emitting product according to any one of the above first aspects is stored in the memory, and when the processor executes the computer program, the method for detecting authenticity is realized, so that authenticity of a counterfeit-proof article can be detected quickly. Since the electronic device provided by the present invention includes a processor capable of executing the detection method provided by any of the above-mentioned first aspect, the electronic device provided by the present application has all the advantages of the detection method provided by any of the first aspect of the present invention.
An aspect of the seventh aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the detection method according to any aspect of the first aspect of the present application.
According to the computer-readable storage medium provided by the present invention, a computer program needs to be stored in a computer-readable storage medium, which ensures that the computer program can be executed by a processor, so as to realize that the authenticity of the counterfeit-proof article can be rapidly detected by the above-mentioned detection method.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of embodiments according to the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart illustrating a method for detecting authenticity of a light-emitting product according to an embodiment of the present invention;
FIG. 2 shows one of the graphs of the luminous intensity function of the luminescent material provided by the embodiment of the present invention;
FIG. 3 is a second graph of a function of the luminescence intensity of a luminescent material provided by an embodiment of the present invention;
fig. 4 is a block diagram of an authenticity detection system for a light-emitting article according to an embodiment of the present invention;
fig. 5 shows a schematic block diagram of an electronic device provided by an embodiment of the invention.
The correspondence between the part names and the reference numbers in fig. 4 and 5 is as follows:
200 true/false detection system, 201 detection device, 202 processing unit, 2021 storage, 2022 processor, 300 electronic equipment, 301 central processing unit, 302 read-only storage, 303 random access storage, 304 bus, 305 input/output interface, 306 input unit, 307 output unit, 308 storage unit, 309 communication unit.
Detailed Description
In order that the above aspects, features and advantages of the embodiments according to the present invention can be more clearly understood, embodiments according to the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may be practiced in other ways than those described herein, and therefore the scope of embodiments according to the invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, an embodiment of the first aspect of the present invention provides a method for detecting authenticity of a light-emitting product, including:
s102: illuminating the light-emitting article with excitation light such that the light-emitting article produces emission light;
s104: detecting an intensity of first emission light generated by the light emitting article at a first time;
s106: detecting an intensity of a second emission light produced by the light-emitting article at a second time;
s108: the intensity of the first emitted light and the intensity of the second emitted light are compared, and whether the light-emitting article is authentic is determined according to the intensity comparison result.
According to the authenticity detection method of the light-emitting product provided by the embodiment, the authenticity of the light-emitting product such as the anti-counterfeiting element is detected, and during detection, the light-emitting product is continuously irradiated by exciting light, so that the light-emitting product generates emitted light. After that, the intensity of the emitted light generated by the light-emitting product can be detected at the two nodes of the first time and the second time, and the authenticity judgment can be carried out according to the intensity magnitude relation. The method can judge the authenticity of the product by comparing the intensity change of the emitted light generated after the luminescent product is irradiated by the exciting light, replaces the traditional method for judging the authenticity by detecting the intensity of the emitted light by a detector, and the method for judging the authenticity by the intensity of the emitted light is very common and is very easy to find, so the scheme has strong concealment and is not easy to find and imitate by counterfeiters.
Further, whether the light emitting article is authentic is determined based on the intensity comparison result and an intensity function of the emitted light of the light emitting article. The intensity function is a function relationship between the intensity of the light-emitting material and the time as the irradiation time of the excitation light is prolonged, and the intensity function of the emitted light generated under the irradiation of the excitation light is different according to the material of the light-emitting product, for example, the intensity function of the emitted light may be specifically a monotone increasing function, a monotone decreasing function, or a function of first monotone increasing and then monotone decreasing, etc. In this embodiment, when determining whether the light-emitting product is true according to the intensity comparison result, the intensity function of the emitted light of the light-emitting product may be obtained first, so that the intensity of the emitted light of the light-emitting product at different times can be determined according to the intensity function of the emitted light. And with this as a reference, determining whether the detected intensities of the emitted light at the first and second times meet the requirements of an intensity function of the emitted light from the light-emitting article. If the light-emitting product is not matched, the light-emitting product is judged to be false. For example, if the intensity function of the emitted light of a certain luminescent product to be detected is a monotone increasing function, when it is required to detect whether the luminescent product is true, the luminescent product is firstly emitted with the exciting light, the luminescent product is irradiated with the exciting light, so that the first emitted light intensity can be generated at the first time, when the time for continuously irradiating the luminescent product with the exciting light is continued from the first time to the second time, the luminescent product can generate the second emitted light intensity at the second time, the first emitted light intensity and the second emitted light intensity are compared, if the first emitted light intensity is less than the second emitted light intensity, the function relationship that the intensity of the emitted light generated by the luminescent product and the irradiation time of the exciting light are monotone increasing is described, the luminescent product can be proved to be true, if the first emitted light intensity is greater than the second emitted light intensity, the function relationship that the intensity of the emitted light generated by the luminescent product and the irradiation time of the exciting light are monotone decreasing is described, the light-emitting product is proved to be false, if the intensity of the first emission light is less than or equal to the intensity of the second emission light, the fact that the intensity of the emission light generated by the light-emitting product is not proportional to the irradiation time of the excitation light is indicated, namely, the intensity of the emission light is not increased along with the change of the irradiation time of the excitation light, the fact that the light-emitting product is false is indicated, on the contrary, when the fact that the intensity of the emission light generated by the light-emitting product and the irradiation time of the excitation light are in a monotonically decreasing functional relation is determined, if the measured intensity of the first emission light is greater than the intensity of the second emission light, the fact that the light-emitting product is true is indicated, and if the measured intensity of the first emission light is less than or equal to the intensity of the second emission light, the fact that the light-emitting product is false is indicated. Therefore, when the authenticity of the light-emitting product to be distinguished is judged, the relation between the intensity function of the light-emitting product and the intensity of the first emitted light and the intensity of the second emitted light detected by the scheme is only needed to be judged. Thus, the authenticity judgment of different types of luminous products can be realized.
Specifically, if the intensity of the emitted light of a certain light-emitting article is known to be a monotonically increasing function of the irradiation time of the excitation light. By continuing to irradiate a certain luminescent product from t1 to t2, wherein t1 < t2, if the corresponding relationship between the luminous intensity generated by the luminescent product at the corresponding time is measured as shown in fig. 2, it can be shown from the image that the intensity of the light emitted by the luminescent product is in a monotonically increasing functional relationship with the irradiation time of the excitation light, and the luminescent product is true.
Further, the time difference between the second time and the first time is 10 or more-5The second is 0.2 seconds or less. When the authenticity is detected through the intensity of the two time points, the time difference between the second time and the first time is not too large, and the time difference between the second time and the first time is more than or equal to 10-5Preferably, the second is less than or equal to 0.2 second, so that it can be avoided that the second time is too far from the first time, resulting in interference with the measurement by some interference factors that may interfere with the measurement result during the detection process, for example, detectionIn the measuring process, the irradiation intensity of the exciting light changes, the irradiation wavelength of the exciting light changes, and the like, so that the measurement of the intensity of the second emitting light is inaccurate, and the accuracy is influenced.
Further, detecting an intensity of a third emitted light generated by the light-emitting article at a third time, comparing the intensity of the second emitted light with the intensity of the third emitted light, and determining whether the light-emitting article is authentic according to the intensity comparison result, wherein the third time is after the second time. By detecting the intensity of the third emitted light generated by the light-emitting product at the third time and comparing the intensity of the second emitted light with the intensity of the third emitted light, the detection accuracy can be further improved, and the judgment error caused by the measurement error when the first intensity or the second intensity is measured can be avoided. In addition, the technical scheme further expands the range of the detected light-emitting products, for example, the intensity function of some light-emitting products is not limited to a common monotone increasing or monotone decreasing function, the irregular intensity function generated by some light-emitting products is, for example, the light-emitting products generate an intensity of emitted light which is in a relation of monotone increasing and then monotone decreasing with the irradiation time of the exciting light, the function relation of the intensity of the emitted light and the irradiation time of the exciting light is proved by the intensity of the second emitted light and the intensity of the first emitted light, the function relation of the intensity of the emitted light and the irradiation time of the exciting light is proved by the intensity of the second emitted light and the intensity of the third emitted light, and the function relation of the intensity of the emitted light and the irradiation time of the exciting light are proved by monotone increasing and then decreasing, and further the function relation of the light-emitting products generate the emitted light and the irradiation time of the exciting light are proved by monotone increasing, and decreasing, Then, the relationship of monotonous decrease is formed, and the authenticity of the luminous product is judged.
Specifically, if the intensity of the emitted light of a certain light-emitting article is known to be a monotonically increasing function of the irradiation time of the excitation light. By continuing to irradiate a certain luminescent product for a time from t1 to t2 and then to t3, wherein t1 < t2 < t3, if the relationship between the luminous intensity generated by the luminescent product at the corresponding time is measured as shown in fig. 3, the image shows that the intensity of the light emitted by the luminescent product is in a monotonically increasing functional relationship with the irradiation time of the excitation light, so that the luminescent product can be indicated as true.
Further, the excitation light is a non-pulsed light source or a light source with a predetermined pulse period. The non-pulsed light source can be selected as the excitation light, can generate continuous irradiation light for the light-emitting product, and can enable the light-emitting product to continuously generate the emission light, and the light source with a preset pulse period can also be selected as the excitation light.
Further, the wavelength of the excitation light is 200 nm or more and 1500 nm or less. The wavelength of the excitation light can be 365 nm, 808 nm, 980 nm, 1500 nm, etc., and the intensity of the light emitted by the light-emitting product can be further improved under the irradiation of the excitation light with the wavelength.
Further, when the light-emitting article is irradiated with the excitation light, the illuminance of the excitation light is a fixed value. The illuminance of the exciting light is a fixed value, so that the measuring result can be prevented from being influenced by the change of the illuminance, and the accuracy of authenticity detection through intensity is further improved.
Further, the wavelength range of the first emitted light overlaps or at least partially overlaps the wavelength range of the second emitted light. The selection of the first time and the second time can be arbitrarily selected in principle, but in order to ensure the accuracy of the measurement, certain restrictions can be imposed on the two time nodes. For example, when the first time and the second time are selected, two times that the wavelength range of the first emitting light overlaps or at least partially overlaps with the wavelength range of the second emitting light are preferably selected, so that the situation that misjudgment or intensity detection cannot be performed due to improper selection of the first time and the second time is avoided, and the accuracy of anti-counterfeiting detection is further improved.
Embodiments of a second aspect of the invention provide a luminescent article made from a luminescent material comprising: having WrXmOn：Lip，ZqComponent of the formula WrXmOn：Lip，ZqW in the general formula is selected from one or a combination of more of yttrium element, lanthanum element and ytterbium element, X is selected from one or a combination of more of phosphorus element, molybdenum element and aluminum element, O is oxygen element,li is lithium element, Z is one or the combination of more of erbium element, thulium element and holmium element; wherein r is the total mole fraction of one or more of yttrium element, lanthanum element and ytterbium element, m is the total mole fraction of one or more of phosphorus element, molybdenum element and aluminum element, n is the mole fraction of oxygen element, n is not equal to 0, p is the mole fraction of lithium element, q is the total mole fraction of one or more of erbium element, thulium element and holmium element, and p is not equal to 0.
The light-emitting article according to the present embodiment, wherein WrXmOnThe method is characterized in that Li element is added into the existing luminescent material composition, and the addition of the Li element can obviously improve the luminous intensity of the base material under the same excitation condition, and improve the feasibility and the accuracy of the detection method. That is this application has improved the luminous intensity of luminescent product through adding Li element for the true and false judgement that carries out luminescent material through intensity variation becomes easier to realize, can not lead to detecting the failure because of luminous intensity is not enough. In addition, the sintering temperature of the luminescent material in the preparation process can be obviously reduced by adding the Li element, so that the energy is saved, and particularly, the sintering temperature of the existing luminescent material is generally required to be about 1200-1500 ℃ in the preparation process, while the sintering temperature is only required to be about 900-1200 ℃ after the components and the content of the auxiliary agent are changed and the Li element is added into the matrix, so that the sintering temperature is reduced by about 300 ℃. The reaction temperature is reduced, so that the energy consumption is saved, the temperature rise and fall time is correspondingly shortened, the time is saved, and the production period is shortened. Third, generally speaking, in the sintering experiment performed at 1000 ℃ or higher, the requirements for the heating device of the high temperature furnace and the crucible are obviously increased, so that the reaction temperature is reduced to 1000 ℃ or lower, and the requirements for the adopted high temperature furnace equipment and sintering vessels such as the crucible are correspondingly reduced. And fourthly, the consumption of consumables such as a crucible can be reduced. The preferable Li element may be Li2CO3、LiNO3And the like. Lithium is between 0.001 and 0.3, and r is between 0 and 5M is 1 to 5, p ≠ 0, q is 0.0011 to 0.1. By limiting the elements, the substrate and the doped ions can form a stable structure, so that the luminescent material with excellent comprehensive performance is obtained, and the later application is facilitated. In addition, the luminous efficiency and luminous intensity of the luminous product can be further improved.
Further, the luminescent article is a liquid luminescent article or a solid luminescent article; the liquid luminous product can be made into ink jet, etc. and sprayed on the object, while the solid luminous product can be made into strip-like or thread-like structure, so that the liquid or solid luminous product can be combined with other objects.
Furthermore, the raw materials of the luminescent material in the synthesis process also comprise an auxiliary agent, and the auxiliary agent is selected from one or a combination of a plurality of boric acid, bismuth trioxide and zinc oxide. The addition of the auxiliary agent can obviously improve the luminous intensity of the prepared luminescent product under the conditions of not influencing the luminous wavelength and the attenuation rate, and is favorable for later detection.
Embodiments of the third aspect of the invention provide a security element comprising a luminescent article as provided by embodiments of the second aspect. The anti-counterfeiting element in this embodiment can be any one of anti-counterfeiting ink, anti-counterfeiting fiber, anti-counterfeiting thread, anti-counterfeiting substrate or anti-counterfeiting label, and because the anti-counterfeiting element in this embodiment includes the luminescent product provided by the second embodiment, the anti-counterfeiting element in this embodiment has all the beneficial effects of the luminescent product of the second aspect embodiment, and is not repeated here.
Embodiments of the fourth aspect of the present invention provide a security article, which may be a luminescent material, a value document, a certificate, a bill or a package, etc., and since the security article of the present embodiment includes the luminescent article of the embodiments of the second aspect of the present invention, the security article of the present embodiment includes all the beneficial effects of the luminescent article provided by the embodiments of the second aspect of the present invention.
As shown in fig. 4, an embodiment of the fifth aspect of the present invention provides an authenticity detection system 200 for a light-emitting product, including: an excitation light for illuminating the light emitting article; a detection device 201 for detecting the intensity of the emitted light generated when the light-emitting article is irradiated by the excitation light; the processing unit 202 includes a storage 2021 and a processor 2022, the storage 2021 stores a computer program, and the processor 2022 implements the detection method provided in the embodiments of the first aspect of the present application when executing the program, so that the system can quickly detect the authenticity of the counterfeit-proof article. Meanwhile, since the authenticity detection system 200 for a light-emitting product of the present embodiment can perform the detection method of the embodiment of the first aspect, the authenticity detection system 200 for a light-emitting product provided by the present embodiment has all the beneficial effects of the detection method provided by the embodiment of the first aspect.
An embodiment of a sixth aspect of the present invention provides an electronic device, including a storage and a processor, where the storage stores a computer program, and the processor executes the computer program to implement the detection method according to any aspect of the embodiments of the first aspect of the present application.
FIG. 5, among other things, illustrates a schematic block diagram of an electronic device 300 that may be used to implement embodiments of the present disclosure. As shown in fig. 5, the electronic device 300 comprises a central processing unit 301 which may perform various suitable actions and processes in accordance with computer program instructions stored in a read only memory 302 or computer program instructions loaded from a storage unit 308 into a random access memory 303. In the random access memory 303, various programs and data necessary for the operation of the electronic device 300 can also be stored. The central processing unit 301, the read only memory 302, and the random access memory 303 are connected to each other via a bus 304. An input/output interface 305 is also connected to the bus 304.
A plurality of components in the electronic device 300 are connected to the input/output interface 305, including: an input unit 306 such as a keyboard, a mouse, or the like; an output unit 307 such as various types of displays, speakers, and the like; a storage unit 308 such as a magnetic disk, optical disk, or the like; and a communication unit 309 such as a network card, modem, wireless communication transceiver, etc. The communication unit 309 allows the electronic device 300 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.
The central processing unit 301 performs the various methods and processes described above. For example, in some embodiments, the detection method in the first aspect embodiment may be implemented as a computer software program tangibly embodied in a machine-readable medium, such as storage unit 308. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 300 via the read-only memory 302 and/or the communication unit 309. When the computer program is loaded into the random access memory 303 and executed by the central processing unit 301, one or more steps of the detection method described above may be performed. Alternatively, in other embodiments, the central processing unit 301 may be configured in any other suitable way to perform the detection method in the embodiments of the first aspect.
An embodiment of the seventh aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the detection method of the embodiment of the first aspect of the present application.
The program code for implementing the control method of a radio transmission node of the present invention may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or electronic device.
In the context of the present invention, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disc read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
In embodiments according to the invention, the terms "first", "second", "third" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art according to specific situations.
Further, while operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the invention. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
The above is only a preferred embodiment according to the present invention, and is not intended to limit the embodiment according to the present invention, and various modifications and variations may be made to the embodiment according to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment according to the present invention should be included in the protection scope of the embodiment according to the present invention.
Claims (13)
1. A method for detecting authenticity of a light-emitting product, wherein the light-emitting product is made of a light-emitting material, the method comprising:
illuminating the light-emitting article with excitation light such that the light-emitting article produces emission light;
detecting an intensity of first emission light generated by the light emitting article at a first time;
detecting an intensity of a second emission light produced by the light-emitting article at a second time;
and comparing the intensity of the first emission light with the intensity of the second emission light, and judging whether the light-emitting product is true or not according to the intensity comparison result.
2. The method of claim 1, wherein the step of determining whether the luminescent product is authentic according to the intensity comparison result comprises:
and judging whether the light-emitting product is true or not according to the intensity comparison result and the intensity function of the light-emitting product.
3. The method for detecting authenticity of a light-emitting article according to claim 1, wherein the step of detecting authenticity of the light-emitting article,
the time difference between the second time and the first time is greater than or equal to 10-5The second is 0.2 seconds or less.
4. The method of detecting authenticity of a light-emitting article according to claim 1, further comprising:
detecting an intensity of a third emission light generated by the light-emitting article at a third time, the third time being subsequent to the second time, comparing the intensity of the second emission light with the intensity of the third emission light, and determining whether the light-emitting article is authentic based on the intensity comparison.
5. The method for detecting authenticity of a light-emitting article according to claim 1, wherein the step of detecting authenticity of the light-emitting article,
the exciting light is a non-pulse light source or a light source with a preset pulse period; and/or
The wavelength of the exciting light is more than or equal to 200 nanometers and less than or equal to 1500 nanometers; and/or
When the light-emitting product is irradiated by the excitation light, the illuminance of the excitation light is a fixed value.
6. The method for detecting authenticity of a light-emitting article according to claim 1, wherein the step of detecting authenticity of the light-emitting article,
the wavelength range of the first emitted light overlaps or at least partially overlaps the wavelength range of the second emitted light.
7. A light emitting article, wherein the light emitting article is made of a light emitting material comprising: having WrXmOn：Lip，ZqA component of the formula WrXmOn：Lip，ZqW in the general formula is selected from one or a combination of more of yttrium element, lanthanum element and ytterbium element, X is selected from one or a combination of more of phosphorus element, molybdenum element and aluminum element, O is oxygen element, Li is lithium element, Z is selected from one or a combination of more of erbium element, thulium element and holmium element, wherein,
r is the total mole fraction of one or more of the yttrium element, the lanthanum element and the ytterbium element, m is the total mole fraction of one or more of the phosphorus element, the molybdenum element and the aluminum element, n is the mole fraction of the oxygen element, n is not equal to 0, p is the mole fraction of the lithium element, and q is the total mole fraction of one or more of the erbium element, the thulium element and the holmium element; and p ≠ 0.
8. The light-emitting article according to claim 7,
the molar fraction of lithium is 0.001 to 0.3, the value of r is between 0 and 5, m is 1 to 5, p is not equal to 0, q is 0.0011 to 0.1; and/or
The raw materials of the luminescent material in the synthesis process also comprise an auxiliary agent, wherein the auxiliary agent is one or a combination of more of boric acid, bismuth trioxide and zinc oxide.
9. A security element comprising a luminescent article according to claim 7 or 8.
10. A security article comprising a luminescent article according to claim 7 or 8 or a security element according to claim 9.
11. A system for detecting authenticity of a light emitting article, comprising:
an excitation light for illuminating the light emitting article;
the detection device is used for detecting the intensity of emitted light generated when the light-emitting product is irradiated by the exciting light;
a processing unit comprising a storage having stored thereon a computer program and a processor implementing the method according to any of claims 1 to 6 when executing the program.
12. An electronic device comprising a storage and a processor, the storage having stored thereon a computer program, characterized in that the processor, when executing the program, implements the method according to any of claims 1 to 6.
13. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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