CN110335532A - A method of it is anti-fake using long phosphorescence - Google Patents
A method of it is anti-fake using long phosphorescence Download PDFInfo
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- CN110335532A CN110335532A CN201910464708.5A CN201910464708A CN110335532A CN 110335532 A CN110335532 A CN 110335532A CN 201910464708 A CN201910464708 A CN 201910464708A CN 110335532 A CN110335532 A CN 110335532A
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- long phosphorescence
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
- G06K19/022—Processes or apparatus therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06018—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding
- G06K19/06028—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking one-dimensional coding using bar codes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F19/00—Advertising or display means not otherwise provided for
- G09F19/12—Advertising or display means not otherwise provided for using special optical effects
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
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Abstract
The invention discloses a kind of methods anti-fake using long phosphorescence, being using pulse width is femtosecond magnitude, energy density is greater than or equal to the ultra-short pulse laser beam that the long phosphorescence of transparent medium generates threshold value, the long phosphorescence of any security pattern (two dimensional code, bar code etc.) is induced inside transparent material.After subsiding to long phosphorescence, there are under the region sunshine condition of security pattern naked eyes invisible in transparent material, and no matter when under ultraviolet light or white light excitation can reproduce long phosphorescence pattern, this method can be used for anti-fake.
Description
Technical field
The present invention relates to the methods anti-fake using long phosphorescence, mainly utilize induced by ultrashort pulse laser transparent material
Long phosphorescence is issued, after subsiding to long phosphorescence, the method for anti-counterfeit of long phosphorescence is reproduced under ultraviolet excitation.
Background technique
Long phosphorescence refers to the phenomenon that energy continuous illumination after excitation light source cutting.1998, the discovery of Qiu Jianrong group flew
Second laser irradiation contains the calcium aluminosilicate glass of rare earth ion (Ce3+, Tb3+, Pr3+), after removing laser, by Femtosecond-Laser Pulse Excitation
Part can also issue bright phosphorescence.And before this, long phosphorescent glow is typically all by UV light-induced.With phosphorescent
The material of matter after ultraviolet light, can still be arrived tens of hours for continuous illumination tens seconds and be differed.Relative to traditional ultraviolet
The long phosphorescent glow of photoinduction, the long phosphorescence of femtosecond laser induction is because of spies such as the photon densities of its spatial selectivity and superelevation
Point shows etc. that there is important application in fields in 3 D stereo.
Summary of the invention
The object of the invention is different from first technology, is to provide a kind of anti-fake with ultraviolet light or the long phosphorescence of white light reconstruction
Method.
It was found that some material, works as induced with laser during research induced by ultrashort pulse laser long phosphorescence
Long phosphorescence subside after, under the excitation of ultraviolet light or white light, long phosphorescence is occurred by the region that laser irradiation is crossed again,
And this process can be demonstrated repeatedly under normal temperature conditions.In addition, the pattern inside femtosecond laser write-in transparent material is in daylight
Under the conditions of it is invisible.Invisible and ultraviolet light or white light excitation lower the phenomenon that reproducing long phosphorescence, can make under this sunshine condition
For a kind of anti-fake method.It comprises the concrete steps that:
(1), choosing transparent material is the rare earth ions such as europium doped, terbium, samarium, or the transition metal ions such as doping manganese, chromium
Glass；Either with the quartz glass etc. of intrinsic defect structure；
(2), selecting pulse width is the ultra-short pulse laser beam of femtosecond magnitude, and energy density is produced greater than transparent material
Grow the threshold value of phosphorescence；
(3), make ultra-short pulse laser beam that two dimensional code, bar code etc. be written inside transparent material by micro Process program
Anti-false sign issues apparent long phosphorescence by the region of Myocardial revascularization bylaser at this time；
(4), after long phosphorescence recession, with ultraviolet light or white light, the region irradiated by ultra-short pulse laser, then
It is secondary long phosphorescence occur.
Compared with prior art, technical effect of the invention is as follows: can be by arbitrary anti-fake figure with method of the invention
Case is written in above-mentioned transparent material, after the long phosphorescence of induced by ultrashort pulse laser subsides completely, no matter daytime or night,
As long as ultraviolet light pattern writing area, the long phosphorescence pattern with anti-fake effect can reproducing.Swashed using ultrashort pulse
The characteristic of light minute manufacturing, anti-fake pattern, which is written, can be as small as millimeter magnitude, furthermore by controlling laser power, write-in
It is invisible under pattern sunshine condition, reach real antifalse effect.
Detailed description of the invention
Fig. 1 (a), (b) and (c) are that pattern in 2 D code is written in the borogermanates inside glass for mixing Mn with femtosecond laser beam
Security element, Security element of the Fig. 1 (a) under the conditions of natural light；Fig. 1 (b) is that red long phosphorescence is reproduced after white light
Two-dimension code anti-counterfeit element, Fig. 1 (c) be femtosecond laser written pattern after, white light irradiate again after long phosphorescence spectrum.
Fig. 2 (a) and (b) are that preventing for monogram is written inside the borosilicate glass for mixing Tb3+ with femtosecond laser beam
Pseudo- element, Fig. 2 (a) are the Security element under the conditions of natural light；Fig. 2 (b) is that green word is reproduced after 365nm ultraviolet light
The Security element of master pattern.
Fig. 3 (a) and (b) they are the Security element that monogram is written in lithium germanium oxide inside glass with femtosecond laser beam, wherein
Fig. 3 (a) is the glass sample that monogram is written in femtosecond laser, and the pattern naked eyes of write-in are invisible；Fig. 3 (b) is in 254nm
The Security element of orange monogram is reproduced after ultraviolet light.
Fig. 4 (a) and (b) are the Security element that bar code pattern is written inside silicate glass with femtosecond laser beam,
Middle Fig. 4 (a) is the glass sample that bar code pattern is written in femtosecond laser, and the pattern naked eyes of write-in are invisible；Fig. 4 (b) is write-in
Glass after bar code case reproduces bar code pattern after 254nm ultraviolet light.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples, but should not therefore limit protection of the invention
Range.
Embodiment 1
Attached drawing 1 is shown with femtosecond laser beam in the anti-of the borogermanates inside glass write-in pattern in 2 D code for mixing Mn2+
Pseudo- element, wherein Fig. 1 (a) is the borosilicate glass sample after femtosecond laser write-in bar code, the bar code pattern of write-in
It is visually invisible；
Fig. 1 (b) is that the glass after bar code pattern is written reproduces red pattern in 2 D code after white light.
Fig. 1 (c) is after femtosecond laser written pattern with the long phosphorescence spectrum generated after white light.Long phosphorescence glow peak
Near 630nm, the 4T1-6A1 transition of corresponding Mn2+.
Specific steps are as follows:
Selection pulse width is 120fs (fs=10-15s), central wavelength 800nm, mean power 15mw, repetition rate
The femtosecond laser of 1kHz focuses on the glass that chemical constituent is 25B2O3-50ZnO-25GeO2-0.2MnO by 5 times of object lens
It is internal.It is completed by micro Process process control three-D displacement platform in inside glass by the pattern trace motion scan of setting
The write-in of security pattern.The area of the pattern that the invisible of security pattern naked eyes is written with white light, the region hair being written at this time
Long phosphorescence, security pattern show again out.
Embodiment 2:
Attached drawing 2 is shown, and the anti-fake of monogram is written with femtosecond laser beam inside the borosilicate glass for mixing Tb3+
Element, wherein Fig. 2 (a) is the glass sample that monogram is written in femtosecond laser, and the pattern naked eyes of write-in are invisible；Fig. 2 (b)
Green monogram is reproduced under 365nm ultraviolet light for the glass after write-in monogram.
Specific steps are as follows:
Selection pulse width is 250fs (fs=10-15s), central wavelength 800nm, mean power 30mw, repetition rate
It is 60ZnO3-20B2O3-20SiO2-0.1Tb2O3's that the femtosecond laser of 10kHz, which focuses on chemical constituent by 10 times of object lens,
Inside glass.A security pattern is written as described in Example 1, the region of written pattern, which issues, at this time is located near 547nm
The long phosphorescence of green.After subsiding to long phosphorescence, sample present again it is colorless and transparent, it is green then with 365nm ultraviolet light
The pattern of long phosphorescence is observed again.At room temperature, this UV light-induced long phosphorescence reproducting method can nothing
Limit is recycled.Therefore it is suitable for anti-fake.
Embodiment 3:
Attached drawing 3 show the Security element with femtosecond laser beam in lithium germanium oxide inside glass write-in monogram, wherein scheming
3 (a) glass sample of monogram is written for femtosecond laser, and the pattern naked eyes of write-in are invisible；Fig. 3 (b) is write-in grapheme
Glass after case reproduces orange monogram under 254nm ultraviolet light.
Specific steps are as follows:
Selection pulse width is 30fs (fs=10-15s), central wavelength 800nm, mean power 350mw, repetition rate
The femtosecond laser of 100kHz focuses on the inside glass that chemical constituent is 15Li2O-15ZnO-70GeO2 by 20 times of object lens.
Be written a security pattern as described in Example 1, sample presents colorless and transparent again, then with 254nm ultraviolet light, grows
The pattern of phosphorescence is observed again.
Embodiment 4:
Attached drawing 4 show the Security element that bar code pattern is written inside silicate glass with femtosecond laser beam, wherein
Fig. 4 (a) is the glass sample that bar code pattern is written in femtosecond laser, and the pattern naked eyes of write-in are invisible；Fig. 3 (b) is write-in item
Glass after shape code case reproduces bar code pattern after 254nm ultraviolet light.
Specific steps are as follows:
Selection pulse width is 500fs (fs=10-15s), central wavelength 800nm, mean power 350mw, repetition rate
It is 40CaCO3-30Al2O3-30SiO2- that the femtosecond laser of 250kHz, which focuses on chemical constituent by 50 times of object lens,
The inside glass of 0.05Pr2O3.A security pattern is written as described in Example 1, sample presents colourless under natural light
Bright shape, then with after 254nm ultraviolet light, Myocardial revascularization bylaser region issues the long phosphorescence of red being located near 606nm again, writes
The bar code pattern entered is observed again.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the above embodiments do not limit the invention in any form, all obtained by the way of equivalent substitution or equivalent transformation
Technical solution is fallen within the scope of protection of the present invention.
Claims (4)
1. a kind of method anti-fake using long phosphorescence mainly issues long phosphorescence using induced by ultrashort pulse laser transparent material,
After subsiding to long phosphorescence, the region irradiated by ultra-short pulse laser reproduces long phosphorescence under ultraviolet light or white light excitation
Method for anti-counterfeit.It is characterized in that, that the method comprising the steps of is as follows:
1. selecting pulse width is the ultra-short pulse laser beam of femtosecond magnitude, energy density is greater than transparent material and generates long phosphorescence
Threshold value；
2. making ultra-short pulse laser beam go out two dimensional code, bar code, text etc. in transparent material inner scanning by micro Process program
Arbitrary security pattern issues apparent long phosphorescence by the pattern of Myocardial revascularization bylaser at this time；
3. after long phosphorescence recession, after ultraviolet light or white light, by the region of ultra-short pulse laser written pattern, again
There is long phosphorescence.
2. a kind of method anti-fake using long phosphorescence according to claim 1, it is characterised in that transparent material doping is dilute
Native ion such as europium, terbium, samarium；Or containing transition metal ions of manganese, chromium；Or transparent material has intrinsic defect structure, such as has
There is the quartz glass of oxygen defect.
3. a kind of method anti-fake using long phosphorescence according to claim 1, which is characterized in that by controlling ultrashort pulse
The arbitrary security patterns such as two dimensional code, bar code, text inside transparent material are written, in normal day in the power of laser
It is visually sightless under the conditions of light.
4. a kind of method anti-fake using long phosphorescence according to claim 1, it is characterised in that ultra-short pulse laser write-in
The arbitrary security pattern such as two dimensional code, bar code inside transparent material has stable defect sturcture, thus nothing at normal temperature
Long phosphorescence pattern can be reproduced with ultraviolet light by daytime or night.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910464708.5A CN110335532A (en) | 2019-05-30 | 2019-05-30 | A method of it is anti-fake using long phosphorescence |
| PCT/CN2019/097923 WO2020237811A1 (en) | 2019-05-30 | 2019-07-26 | Method for using long phosphorescence to prevent counterfeiting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910464708.5A CN110335532A (en) | 2019-05-30 | 2019-05-30 | A method of it is anti-fake using long phosphorescence |
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| CN110335532A true CN110335532A (en) | 2019-10-15 |
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| CN201910464708.5A Pending CN110335532A (en) | 2019-05-30 | 2019-05-30 | A method of it is anti-fake using long phosphorescence |
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| WO (1) | WO2020237811A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296511A (en) * | 2020-09-30 | 2021-02-02 | 北京德弦科技有限公司 | Method for processing, reading and detecting miniature mark of gem and processing device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304841A (en) * | 2001-01-16 | 2001-07-25 | 中国科学院上海光学精密机械研究所 | Process for preparing luminous 3D color pattern reproduced under ultraviolet stimulation |
| CN1800913A (en) * | 2006-01-18 | 2006-07-12 | 中国科学院上海光学精密机械研究所 | Method for forming three-dimensional color pattern inside transparent SiO2 gel |
| CN101320533A (en) * | 2007-06-08 | 2008-12-10 | 上海镭立激光科技有限公司 | Anti-fake marker and manufacturing method thereof |
| CN102762691A (en) * | 2010-02-17 | 2012-10-31 | 法国圣-戈班玻璃公司 | Luminescent compounds |
| CN103407301A (en) * | 2013-07-09 | 2013-11-27 | 北京工业大学 | Internal laser writing method capable of being used for anti-counterfeiting judgment of commodities packaged by transparent materials |
| CN103843013A (en) * | 2011-09-29 | 2014-06-04 | 光谱系统公司 | Methods and systems for authenticating and tracking objects |
| CN105916697A (en) * | 2014-02-07 | 2016-08-31 | 德国捷德有限公司 | Producing a security element having color changing properties |
| CN108174613A (en) * | 2015-08-04 | 2018-06-15 | 光谱系统公司 | Luminescence generated by light verifies devices, systems, and methods |
| CN109219526A (en) * | 2016-05-31 | 2019-01-15 | 康宁股份有限公司 | The anti-counterfeit measures of glassware |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107659C (en) * | 2000-11-30 | 2003-05-07 | 中国科学院上海光学精密机械研究所 | Method for colouring and generating 3D colour pattern inside transparent object |
| CN1242950C (en) * | 2002-06-14 | 2006-02-22 | 中国科学院上海光学精密机械研究所 | Formation of colored stero pattern inside color-less transparent glass |
| CN201002737Y (en) * | 2006-05-30 | 2008-01-09 | 广州华根包装产品有限公司 | False-proof container |
| CN107757169A (en) * | 2017-10-11 | 2018-03-06 | 福州大学 | A kind of noble metal method for anti-counterfeit based on femtosecond laser |
-
2019
- 2019-05-30 CN CN201910464708.5A patent/CN110335532A/en active Pending
- 2019-07-26 WO PCT/CN2019/097923 patent/WO2020237811A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304841A (en) * | 2001-01-16 | 2001-07-25 | 中国科学院上海光学精密机械研究所 | Process for preparing luminous 3D color pattern reproduced under ultraviolet stimulation |
| CN1800913A (en) * | 2006-01-18 | 2006-07-12 | 中国科学院上海光学精密机械研究所 | Method for forming three-dimensional color pattern inside transparent SiO2 gel |
| CN101320533A (en) * | 2007-06-08 | 2008-12-10 | 上海镭立激光科技有限公司 | Anti-fake marker and manufacturing method thereof |
| CN102762691A (en) * | 2010-02-17 | 2012-10-31 | 法国圣-戈班玻璃公司 | Luminescent compounds |
| CN103843013A (en) * | 2011-09-29 | 2014-06-04 | 光谱系统公司 | Methods and systems for authenticating and tracking objects |
| CN103407301A (en) * | 2013-07-09 | 2013-11-27 | 北京工业大学 | Internal laser writing method capable of being used for anti-counterfeiting judgment of commodities packaged by transparent materials |
| CN105916697A (en) * | 2014-02-07 | 2016-08-31 | 德国捷德有限公司 | Producing a security element having color changing properties |
| CN108174613A (en) * | 2015-08-04 | 2018-06-15 | 光谱系统公司 | Luminescence generated by light verifies devices, systems, and methods |
| CN109219526A (en) * | 2016-05-31 | 2019-01-15 | 康宁股份有限公司 | The anti-counterfeit measures of glassware |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112296511A (en) * | 2020-09-30 | 2021-02-02 | 北京德弦科技有限公司 | Method for processing, reading and detecting miniature mark of gem and processing device |
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Application publication date: 20191015 |