CN102282568A - Information pattern carrier and method for optically reading information pattern - Google Patents
Information pattern carrier and method for optically reading information pattern Download PDFInfo
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- CN102282568A CN102282568A CN2010800047046A CN201080004704A CN102282568A CN 102282568 A CN102282568 A CN 102282568A CN 2010800047046 A CN2010800047046 A CN 2010800047046A CN 201080004704 A CN201080004704 A CN 201080004704A CN 102282568 A CN102282568 A CN 102282568A
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- 238000000034 method Methods 0.000 title claims description 33
- 230000005284 excitation Effects 0.000 claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims abstract description 19
- 230000035945 sensitivity Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 68
- 238000007639 printing Methods 0.000 claims description 62
- 238000006073 displacement reaction Methods 0.000 claims description 39
- 238000004040 coloring Methods 0.000 claims description 37
- 239000002105 nanoparticle Substances 0.000 claims description 33
- 229910052710 silicon Inorganic materials 0.000 claims description 27
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 239000010703 silicon Substances 0.000 claims description 26
- 229910052691 Erbium Inorganic materials 0.000 claims description 21
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 17
- 239000000549 coloured material Substances 0.000 claims description 15
- 239000000049 pigment Substances 0.000 claims description 15
- 239000000975 dye Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 9
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 229910002699 Ag–S Inorganic materials 0.000 claims description 5
- 239000002096 quantum dot Substances 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 description 11
- 239000000969 carrier Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
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- 150000002500 ions Chemical class 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010017 direct printing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 125000003396 thiol group Chemical class [H]S* 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/305—Associated digital information
-
- 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
- C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
- C09K11/562—Chalcogenides
- C09K11/565—Chalcogenides with zinc cadmium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
-
- 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
- C09K11/57—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing manganese or rhenium
- C09K11/572—Chalcogenides
- C09K11/574—Chalcogenides with zinc or cadmium
-
- 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
- C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
- C09K11/582—Chalcogenides
- C09K11/584—Chalcogenides with zinc or cadmium
-
- 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
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
-
- B42D2033/20—
-
- B42D2035/16—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/382—Special inks absorbing or reflecting infrared light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Credit Cards Or The Like (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
Provided is an information pattern carrier, wherein an information pattern (12) is made invisible by forming a mask (13) on the information pattern formed by colored ink or making the color of the colored ink the same as the ground color of an information recording medium (11) or the color of a colored underprint portion. When the information recording medium (11) having the information pattern (12) is mounted on or carried into a predetermined position, excitation light (H1) having energy higher than that of the bandgap of semiconductor quantum dots is applied to the information pattern (12) from a light-emitting diode (15) to thereby thermally expand the semiconductor quantum dots. Light having a wavelength that is shifted to the long-wavelength side is emitted from the thermally expanded semiconductor quantum dots, the emitted light is received by a light sensor (16) having sensitivity to a portion on the long-wavelength side of the shifted wavelength, and the information pattern (12) is read by an information determining unit (17).
Description
Technical field
The present invention relates to be printed with the optical reading method of information pattern carriers such as the information recording carrier of information patterns such as bar code or QR sign indicating number or management object thing and this information pattern.
Background technology
In recent years, for various article, various prepaid card or visa card etc., by printing information patterns such as bar code or QR sign indicating number, and adopt optical pickup device to read this information pattern, carry out the management or the authentication check of various article, various prepaid card or visa card thus.Whether in this case, proposed multiple security system, these security systems are by implementing false proof processing to information pattern, and utilize optical access system to read this information, come the discriminant information pattern to forge.
In patent documentation 1, a kind of optical pickup device is disclosed, it contains the information patterns such as bar code of fluorophor by printing, to this information pattern irradiation semiconductor laser and make phosphor excitation, and accepts the fluorescence that sends from fluorophor and with the optics readout means reads breath pattern of winning the confidence.In this device, when reading, be separated from each other from the exciting light of semiconductor laser diode with from the peak of the wavelength of the fluorescence of fluorophor, therefore can only read the luminescent spectrum of fluorophor.In this security system,, therefore can have than higher security owing to be difficult to forge the fluorophor sign and be difficult to forge the technology that reads the fluorophor sign.
In patent documentation 2, the optical access system of light emitting diode that proposed more miniaturization and the employing cost cheapness of the device of comparable employing semiconductor laser diode.This optical access system reads printed layers with non-visible ink printing with optical mode, and fluorophor constitutes by having added the inorganic oxide of neodymium as activating element.In this fluorophor, the luminescent center wavelength of the light-emitting component of excited fluophor separates with the be subjected to light wavelength zone of acceptance from the photo detector of the fluorescence of printed layers.Thereby even adopt the wavelength width light emitting diode wideer than semiconductor laser diode in the irradiation of exciting light, the luminous of exciting light and fluorophor do not overlap yet, and prevents to produce misinterpretation by reading exciting light when reading.In this technology because the information pattern right and wrong are visible, therefore when reading, can not notice the existence of information pattern, thereby have high security.
Have again, in patent documentation 3, disclose the optical data carrier that contains metallics, wherein, become the light that absorbed to long wavelength shifted reason by volume increase as the result's of irradiation absorption the caused data carrier of thermal expansion.
Patent documentation 1: TOHKEMY 2001-52108 communique
Patent documentation 2: Japanese kokai publication hei 6-274677 communique
Patent documentation 3: TOHKEMY 2008-512807 communique
Summary of the invention
The problem that invention will solve
In the optical pickup device of patent documentation 1, adopt semiconductor laser diode as light source, so the driving circuit of light source is complicated and maximization, makes the cost of optical pickup device surging.
In addition, the present application person tests with regard to the optical access system of patent documentation 2, and the result is that the situation that generation can not be read is more.Think this be because: light emitting diode can not be excited fully with a little less than semiconductor laser diode is compared light intensity, thereby a little less than fluorophor luminous; Because of being difficult to detect the luminous of fluorophor a little less than the light intensity, can not avoid detecting exciting light in addition.Therefore, the means of information pattern can be more clearly read in expectation.
Thereby, the present application person has carried out exploration with keen determination to following printed layers and optical reading method, described printed layers and optical reading method can form the light that can adopt light emitting diode as exciting light, can realize the optical access system of miniaturization and cost cheapness, and the light intensity that fluorophor sent, and can accept light, and can avoid the light that is subjected to of exciting light by sending by the printed layers (information pattern) that exciting light excited with patent documentation 1 diverse ways.
In addition, the present application person is conceived to the caused wavelength of thermal expansion of patent documentation 3 to the long wavelength side displacement, and carried out following thinking repeatedly, promptly, when reading, be used for the avoidance that is subjected to light of exciting light and the security higher to the long wavelength side displacement to non-visible information pattern acquisition with above-mentioned.
The present invention In view of the foregoing proposes, its purpose is can not be formed on to identification information patterns such as bar code on the information pattern carriers such as information recording carrier or management object thing or QR sign indicating number for naked eyes, the optical reading method of a kind of information pattern carrier and information pattern is provided, they can read when reading clearly, even notice the existence of information pattern, the such optical pickup device of information that the malice exploitation can be understood this information pattern also is very difficult, it can realize high security system, and can realize providing the non-visible trackability of high-quality assurance.
Be used to solve the means of problem
Information pattern carrier of the present invention possesses to use the information pattern that the coloring printing ink contain the core/shell type semiconductor-quantum-point forms and cover and is formed on the information pattern and with the mask of this non-visibleization of information pattern.Constituting of information pattern: with at irradiation energy during than the high excitation line of the band gap of semiconductor-quantum-point, the light of the wavelength that semiconductor-quantum-point thermal expansion and sending has had to the long wavelength side displacement.
In addition, information pattern carrier of the present invention possesses information pattern, described information pattern is to use the coloring printing ink that contains the core/shell type semiconductor-quantum-point to form, and the identical color of color of background color by formation and information recording carrier or management object thing or substrate dyed layer and by non-visibleization.Constituting of information pattern: with at irradiation energy during than the high excitation line of the band gap of semiconductor-quantum-point, the light of the wavelength that semiconductor-quantum-point thermal expansion and sending has had to the long wavelength side displacement.
Information pattern carriers such as information recording carrier or management object thing have the information pattern that is printed thereon and forms with non-visible state by coloring printing ink.For this information pattern, when reading,, make its thermal expansion by excitation line vitalizing semiconductor quantum dot, and accept to be sent this moment to the long wavelength side displacement the light of wavelength, carry out the deciphering of information.Therefore, when making carrier, because information pattern is visible, therefore form pattern easily, information pattern is non-visible after manufacturing, can not notice the existence of information pattern therefore when reading.When reading information pattern, the core/shell type semiconductor-quantum-point carries out strong luminous, and its light wavelength of sending is subjected to displacement because of thermal expansion, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and read information clearly.In addition, because the light wavelength of sending is subjected to displacement, therefore be difficult to imitate reading device.Because can improve the absorbability of the heat that is produced by the irradiation of exciting light by coloring printing ink, temperature changes easily, so the easy thermal expansion of semiconductor-quantum-point.About coloring printing ink, also be difficult to simply imitate and make, thereby can improve security.So, can be when the compensation naked eyes can not the processing of identification information pattern, the reliable information that can also utilize the optical pickup device that can understand the wavelength after the displacement to carry out information pattern is understood.
Any coloured material in the pigment that preferred coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.By adopting these coloured materials, and utilize the adjusting of concentration, can easily obtain to absorb the painted of visible light under to the situation of the irradiation of semiconductor-quantum-point not hindering exciting light.
Preferred core/shell type semiconductor-quantum-point with CdSe/ZnS as nuclear.Because it can disperse in coloring printing ink well, do not produce cohesion, therefore the use as printing ink is good, thus printing information pattern well.
Also preferred core/shell type semiconductor-quantum-point is any in following (a)～(f).By adopting these semiconductor-quantum-points, can obtain strong luminous and rightly by the displacement of the formed wavelength of thermal expansion of semiconductor-quantum-point.
(a) with the material that in the ZnSe nano particle, added Te as nuclear, with the ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xAg
xS) as nuclear or shell;
(c) with the ZnS nano particle that contains the Mn ion as nuclear;
(d) with the ZnS nano particle as nuclear;
(e) with Zn-In-Ag-S based semiconductor nano particle as nuclear;
(f) with silicon nano as nuclear or shell.
Also preferred core/shell type semiconductor-quantum-point is any among following (g), (h).Because the coefficient of thermal expansion height of erbium, therefore when making the semiconductor-quantum-point thermal expansion, the displacement that makes wavelength by expanding significantly increases.Therefore, can more clearly read information, thereby can improve security.
(g) with silicon nano as nuclear, with erbium as shell;
(h) with erbium as nuclear, with silicon nano as shell.
In addition, optical reading method of the present invention is the optical reading method of information pattern, described information pattern is to be formed on information recording carrier or the management object thing by the coloring printing ink that use contains the core/shell type semiconductor-quantum-point, and by forming mask thereon by non-visibleization, in described optical reading method, excitation line by higher than the band gap of semiconductor-quantum-point to this information pattern irradiation energy makes the semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point after the thermal expansion sends the light of the wavelength that has had to the long wavelength side displacement; By to displacement the long wavelength side optical sensor that partly has sensitivity accept the light send, and read information pattern.
Another optical reading method of the present invention is the optical reading method of information pattern, described information pattern is to be formed on information recording carrier or the management object thing by the coloring printing ink that use contains the core/shell type semiconductor-quantum-point, and by forming the color identical with the color of its background color or substrate dyed layer by non-visibleization, in described optical reading method, excitation line by higher than the band gap of semiconductor-quantum-point to this information pattern irradiation energy makes the semiconductor-quantum-point thermal expansion; Send the light of the wavelength that has had to the long wavelength side displacement from the semiconductor-quantum-point of thermal expansion; By to displacement the long wavelength side optical sensor that partly has sensitivity accept the light send, and read information pattern.
Be the information pattern of non-visible state for what on information pattern carriers such as information recording carrier or management object thing, print by coloring printing ink, when reading, by using excitation line vitalizing semiconductor quantum dot, make its thermal expansion, accept to send this moment to the long wavelength side displacement the light of wavelength, carry out the deciphering of information.So, when reading, undertaken strong luminously by the core/shell type semiconductor-quantum-point, its light wavelength of sending is because of the thermal expansion displacement, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and read information clearly.In addition, because the light wavelength of sending is subjected to displacement, therefore be difficult to imitate reading device.Because can improve the absorbability of the heat that is produced by the irradiation of exciting light by coloring printing ink, temperature changes easily, so the easy thermal expansion of semiconductor-quantum-point.For coloring printing ink, also be difficult to simply imitate and make, thereby can improve security.So, can compensate the processing that naked eyes can not the identification information pattern, and the reliable information that can carry out information pattern by the optical pickup device that can understand the wavelength after the displacement is understood.
Any coloured material in the pigment that preferred coloring printing ink is sub-micron by dyestuff, leuco dye or particle diameter is painted.By adopting these coloured materials, and utilize the adjusting of concentration, can easily obtain to absorb the painted of visible light under to the situation of the irradiation of semiconductor-quantum-point not hindering exciting light.
Preferred core/shell type semiconductor-quantum-point with CdSe/ZnS as nuclear.Because it can disperse in coloring printing ink well, do not produce cohesion, therefore the use as printing ink is good, thus printing information pattern well.
Also preferred core/shell type semiconductor-quantum-point is any in following (a)～(f).By adopting these semiconductor-quantum-points, can obtain the displacement of strong wavelength luminous and that produce by the thermal expansion of semiconductor-quantum-point rightly.
(a) with the material that in the ZnSe nano particle, added Te as nuclear, with the ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xAg
xS) as nuclear or shell;
(c) with the ZnS nano particle that contains the Mn ion as nuclear;
(d) with the ZnS nano particle as nuclear;
(e) with Zn-In-Ag-S based semiconductor nano particle as nuclear;
(f) with silicon nano as nuclear or shell.
Also preferred core/shell type semiconductor-quantum-point is any among following (g), (h).Because the coefficient of thermal expansion height of erbium, therefore when making the semiconductor-quantum-point thermal expansion, the displacement that makes wavelength by expanding significantly increases.Therefore, can more clearly read information, thereby can improve security.
(g) with silicon nano as nuclear, with erbium as shell;
(h) with erbium as nuclear, with silicon nano as shell.
The invention effect
According to information pattern carrier of the present invention and optical reading method; for utilize coloring printing ink be printed on the information pattern carriers such as information recording carrier or management object thing, and by mask or by with carrier for the coloring printing ink of same color by the information pattern of non-visibleization; when reading, pass through with excitation line vitalizing semiconductor quantum dot; make its thermal expansion; and accept to send this moment to the long wavelength side displacement the light of wavelength, carry out the deciphering of information.Therefore, after manufacturing,, can not notice the existence of information pattern therefore when reading because the information pattern right and wrong are visible.When reading, undertaken strong luminously by the core/shell type semiconductor-quantum-point, and its light wavelength of sending is because of the thermal expansion displacement, thereby makes wavelength region may away from exciting light, therefore can not read exciting light, and read information clearly.In addition, because therefore the light wavelength displacement of sending is difficult to imitate reading device.Because can improve the absorbability of the heat that is produced by the irradiation of exciting light by coloring printing ink, temperature changes easily, so the easy thermal expansion of semiconductor-quantum-point.For coloring printing ink, also be difficult to simply imitate and make, thereby can improve security.So, can be when the compensation naked eyes can not the processing of identification information pattern, can also understand by the reliable information that the optical pickup device behind the wavelength that can understand displacement carry out information pattern.
Description of drawings
Fig. 1 is the skeleton diagram of reading device that is used to implement the optical reading method of the 1st embodiment.
Fig. 2 is the curve map of the relation of the light wavelength sent by the semiconductor-quantum-point that excites room temperature of expression and intensity.
Fig. 3 is expression by making semiconductor-quantum-point expand, excite the curve map of the relation of the light wavelength sent and intensity.
Fig. 4 is the skeleton diagram of reading device that is used to implement the optical reading method of the 2nd embodiment.
Fig. 5 is the skeleton diagram of reading device that is used to implement the optical reading method of the 3rd embodiment.
Fig. 6 is the optical reading method of relevant the 3rd embodiment, and expression is by making the semiconductor-quantum-point thermal shrinkage, exciting the curve map of the relation of the light wavelength sent and intensity.
Symbol description
1,1A reading device
10A, 10B information recording card
11 information recording carriers
11A, 11B information pattern carrier
12 information patterns
13 masks (mask)
14 substrate printed layers
15 light emitting diodes
16,16A optical sensor
17 information detection units
2 optically read mechanisms
3 cooling bodies
The H1 exciting light
H2 is by exciting the light that sends
Embodiment
Below, describe with reference to the embodiment of accompanying drawing information pattern carrier of the present invention and optical reading method.
[the 1st embodiment]
Fig. 1 is the skeleton diagram that the information pattern carrier of present embodiment and being used to is implemented the reading device of optical reading method.Reading device 1 reads the information of information recording card 10A, and its summary formation possesses light emitting diode 15 and optically read mechanism 2.
The coloring printing ink that information pattern 12 contains the core/shell type semiconductor-quantum-point by use is printed on the information recording carrier 11 and forms.In the present embodiment, coloring printing ink contains semiconductor-quantum-point and coloured material and is used to disperse to keep their bonding agent.
Semiconductor-quantum-point is the semi-conductive minuteness particle of nano-scale.Core/shell type refers to the type that covers the nuclear of inboard material with the shell of the material in the outside.In the present embodiment, adopt the core/shell type semiconductor-quantum-point of CdSe/ZnSe.
Coloured material is the material that absorbs visible light.As coloured material, can adopt dyestuff, leuco dye or particle diameter is any in the pigment of sub-micron, is arranged to not hinder described excitation line to the concentration of the limit of the irradiation of described core/shell type semiconductor-quantum-point and contain with coloured material.By adopting these coloured materials and regulating concentration, can easily do not hindered the state of irradiation and absorbed the painted of visible light.
As coloured material, if particularly adopt pigment, then compare with adopting dyestuff, leuco dye, make painted have permanance and against weather, if surpass 1 μ m but the particle diameter of pigment increases, then pigment is brought into play original light-proofness and is interdicted light, hinders the irradiation to semiconductor-quantum-point contained in the printing ink.If the particle diameter of pigment is sub-micron (being lower than 1 μ m), preferable particle size is consistent to be the scope of 0.6～0.8 μ m, then as color filter, can possess light transmission, therefore under the situation of being arranged to the colored ink except that black, preferred especially an amount of employing particle diameter is the pigment of 0.6～0.8 mu m range.In the present embodiment, coloring printing ink is made tusche by adopting carbon black as coloured material.
By form opaque mask 13 on information pattern 12, this information pattern is formed non-visible.Here, (comprising so-called invisible) roughly can not be seen or can not be seen fully to the so-called non-visible eyes that refer to.
In the present embodiment, mask 13 forms the mask printing that pattern is coated with comprehensively on a surface by using the color identical with information pattern 12.As the mask printing, utilize exciting light H1 to the exciting of information pattern 12 in order not hinder, adopt not absorb or do not interdict the such printing of exciting light H1.Particularly, as the coloured material of the printing usefulness that does not absorb exciting light H1, it is pigment of sub-micron etc. that dyestuff, leuco dye or particle diameter are arranged.Particularly, preferably concentration is defined as and adopts carbon black to make tusche and degree that can not identification information pattern 12.In the mask printing, form hidden film (not shown), do not come off so that form the printing ink of mask printing.
Optically read mechanism 2 possesses optical sensor 16 and information detection unit 17.
17 pairs of information detection units are accepted the electric signal (rectangular signal) that light obtains by optical sensor 16 and are amplified, and form the code information signal corresponding with the sign indicating number information of information pattern 12.
Optical reading method about present embodiment, if will have become non-visible information pattern 12 by mask printing 13 information recording card 10A by the mechanical mechanism mounting or deliver to assigned position, then light emitting diode 15 is luminous, for information pattern 12, the exciting light H1 that irradiation energy is higher than the band gap of semiconductor-quantum-point.Exciting light H1 vitalizing semiconductor quantum dot, and make the semiconductor-quantum-point thermal expansion by information pattern 12 is heated.
The semiconductor-quantum-point that is excited sends the light that displacement has taken place wavelength because of thermal expansion.Particularly, if excite the core/shell type semiconductor-quantum-point that comprises the different CdSe/ZnSe of particle diameter with the state of not thermal expansion, then when luminous as shown in Figure 2, each different-grain diameter sends the different multiple light of wavelength.On the other hand, if excite, then as shown in Figure 3, send wavelength to the long wavelength side light of displacement greatly with the state after the thermal expansion.Have, when the nuclear particle of core/shell type semiconductor-quantum-point was made of single particle diameter, wavelength was also identical to the relation of the big displacement of long wavelength side because of thermal expansion again.Because semiconductor-quantum-point is the core/shell type of CdSe/ZnSe, what therefore obtain is luminous strong especially.
Accept the light that semiconductor-quantum-point sends by the optical sensor 16 that long wavelength side part Y is had sensitivity, and convert electric signal to.Information detection unit 17 is graphical with this electric signal, by checking the true and false whether the sign indicating number information that whether can read information pattern 12 and cross-check information pattern 12 come determination information pattern 12 with the data consistent that is recorded in the database.
According to present embodiment, can come excitation information pattern 12 by the light emitting diode 15 of common cheapness, and can send high light (quantum size effect) from semiconductor-quantum-point.In addition, semiconductor-quantum-point is accompanied by thermal expansion and is excited, and the light that sends is offset to long wavelength side, so exciting light and luminous light do not overlap, can clearly detect information pattern, and the silicon of can be enough common cheapness is that photo detector such as photodiode detects in high sensitivity.
Optical pickup device 1 is because semiconductor-quantum-point luminous to the long wavelength side displacement and luminous, therefore forms by using long wavelength side is partly had the light that the optical sensor of sensitivity accepts to send carries out the formation that information is understood.Therefore, be difficult to imitation and make optical pickup device, can realize to provide the optical reading method of high security or quality guarantee.Consequently, can prevent credit card, cash card, phonecard, ID card, student's identity card, subsides ticket card and accumulating card etc. forgery, forge and distort, also can carry out the miniaturization of system simultaneously and save spatialization, and can realize non-visible trackability.
Form information patterns such as bar code or QR sign indicating number with non-visible state on information recording carrier 11, this information pattern can not be with the naked eyes identification.In addition, even if, also be difficult to imitate the printing ink of making present embodiment just in case know the despiteful people of IT technology or tissue are noticed information pattern from the small protuberance of the print film on the surface of information recording carrier 11 existence.In addition, even analyzing the light emitting source of information pattern is the core/shell type semiconductor-quantum-point, and developed in view of the above by accepting to carry out the reading device that information is understood by the light that exciting usually of semiconductor-quantum-point sent, because the light wavelength of sending is offset to long wavelength side, the information that therefore can not utilize common reading device to carry out information pattern is like this understood.
Have, when being printed on information pattern 12 on the information recording carrier 11 by coloring printing ink, information pattern 12 is visible again, therefore confirms printed pattern easily.When reading, coloring printing ink absorbs visible light, and therefore the irradiation by exciting light becomes the temperature of information pattern 12 to rise the easy thermal expansion of semiconductor-quantum-point easily.Particularly in the present embodiment, owing to adopt pigment, therefore the absorbability of the heat that is produced by excitation light irradiation is good.About the composition of coloring printing ink, because simple imitation and manufacturing are difficult, therefore consider from this point, also can realize high security.Particularly in the present embodiment, because having adopted with particle diameter is that the pigment of sub-micron has carried out painted printing ink and comes printing information pattern 12, so the information pattern 12 that can realize to obtain aspect color, having high weather resistance, anti-fading property, combine the system of the quality guarantee that can also realize providing high for a long time with the chemical stability height of core/shell type semiconductor-quantum-point.In addition, disperse well and do not produce cohesion because the core/shell type semiconductor-quantum-point that adopts CdSe/ZnS as coloring printing ink, therefore can use by toluene etc., good as the use of printing ink, and printing information pattern well.
Have again,, also can in reading device, be provided for making the heating arrangements of semiconductor-quantum-point thermal expansion as the alter mode of present embodiment.For example,, also electric heater can be set, be used for giving high heat, make the semiconductor-quantum-point thermal expansion of information pattern 12 bottom of information recording card 10 and the dorsal part that is printed with information pattern 12 as heating arrangements.In addition, as heating arrangements, the mechanism to information pattern 12 irradiation hot lines (infrared ray etc.) can be set also.By these mechanisms, can be reliably the semiconductor-quantum-point of information pattern 12 be heated, make its thermal expansion, thereby can more effectively obtain luminous displacement.
In order to be easy to produce thermal expansion, also can form following formation: via collector lens the exciting light H1 of light emitting diode 15 is carried out optically focused, and be radiated on the information pattern 12 by the semiconductor-quantum-point of excitation light generation.About light emitting diode 15, also can select high-power light emitting diode, also can use a plurality of light emitting diodes to shine, perhaps also can will send ultrared light emitting diode and send ultraviolet light emitting diode and usefulness.
Replace information recording carrier 11, also can constitute in the mode that reads the information pattern that removes the management object thing that blocks the object the shape.As the management object thing, the commodity except that card are arranged, promptly be printed with the commodity of bar code or QR etc., for example the backlining of books or post the commodity etc. of the seal (seal) that has printed information pattern 12 as information pattern 12.
(the 2nd embodiment)
Fig. 4 is the skeleton diagram of reading device that is used to implement the optical reading method of the 2nd embodiment.The information recording card 10B of present embodiment possesses information pattern carrier 11B, and information pattern carrier 11B possesses information recording carrier (or management object thing) 11, be printed on the information recording carrier 11 but do not form the substrate printed layers 14 of information pattern and be printed on bar code on the information recording carrier 11 or information pattern 12 such as QR sign indicating number.Have, the part for repeating with the 1st embodiment mark identical symbol, and the omission explanation again.
In the present embodiment, by being same color, make information pattern 12 non-visibleization with the color of information pattern 12 with than the color assignment that information pattern 12 first substrates are printed on the substrate colouring seal brush layer 14 that obtains on the information recording carrier 11.Here, as the coloring printing ink that uses in the information pattern 12, use the identical coloring printing ink of color and substrate printed layers 14.That is to say, all used the pigment of particle diameter as the carbon black of sub-micron in substrate printed layers 14 and information pattern 12.
According to present embodiment, can be in addition to compensating when reading with non-visible state processing information pattern 12, and when reading, because coloring printing ink absorbs visible light, therefore by the irradiation exciting light temperature of information pattern 12 is risen easily, the easy thermal expansion of semiconductor-quantum-point can be read.In addition,,, therefore consider, also can realize high security from this point owing to be difficult to simply imitate and make about the composition of coloring printing ink.
Alter mode as present embodiment, also can omit substrate printed layers 14, color by making information pattern 12 is identical with the color of the background color of the one side that is printed with information pattern 12 of information recording carrier 11 or management object thing, thereby information pattern 12 is formed non-visible state.For example, also can adopt the coloring printing ink of the coloured material identical, direct printing information pattern 12 on information recording card 10B as information pattern 12 with mixing pigment in the starting material of information recording card 10B.
(the 3rd embodiment)
Fig. 5 is the skeleton diagram of reading device that is used to implement the optical reading method of the 3rd embodiment.In the reading device 1A of present embodiment, be provided with the cooling body 3 that makes the semiconductor-quantum-point thermal shrinkage by semiconductor-quantum-point is cooled off.Have, the part for repeating with the 1st embodiment mark identical symbol, and the omission explanation again.
For cooling body 3, in the present embodiment, it is the mechanism that information pattern 12 is cooled off and then semiconductor-quantum-point is cooled off.Here, cooling body 3 is electric refrigeratory, its in abutting connection with or can be located at contiguously on the face of a side that does not have printing information pattern 12 of information recording carrier 11, can be cooled to-10～0 ℃ temperature.
The optical sensor 16A that possesses as the optically read 2A of mechanism, adopting the scope from wavelength region may shown in Figure 2 to the deflection short wavelength side is the optical sensor that wavelength region may that Ya shown in Figure 6 represents has sensitivity.
In the present embodiment, if will have information recording carrier 10 mountings of information pattern 12 or deliver to assigned position, then 3 pairs of information patterns 12 of cooling body cool off, and make the semiconductor-quantum-point thermal shrinkage.Then, light emitting diode 15 is luminous, the exciting light H1 higher than the band gap of semiconductor-quantum-point to information pattern 12 irradiation energies.The light wavelength (Fig. 2) that semiconductor-quantum-point during with thermal shrinkage never sends is compared, and this semiconductor-quantum-point after the thermal shrinkage sends the light that has to the wavelength of short wavelength side displacement shown in Figure 6.Employing is accepted the light that this sends to the optical sensor 16A that long wavelength side part Ya has sensitivity, produces electric signal.Information detection unit 17 is graphical with this electric signal, by checking the true and false whether the sign indicating number information that whether can read information pattern 12 and cross-check information pattern 12 come determination information pattern 12 with the data consistent that is recorded in the database.
According to present embodiment, light emitting source with the mode excitation information pattern 12 of following thermal shrinkage is the core/shell type semiconductor-quantum-point, because the light that sends of this moment is to the short wavelength side displacement, therefore be the optical sensor that this short wavelength side partly has sensitivity to be accepted to carry out the formation that information is understood behind this light that sends by employing, thereby be to have only the formation of separating read message by special optical pickup device, can realize providing the higher security or the system of quality guarantee.
Have, as the alter mode of present embodiment, cooling body 3 also can be the mechanism that blows Cryogenic air or cryogenic gas in the scope of not destroying information pattern 12 and information recording carrier 11 again.
The present invention is not limited to above-mentioned embodiment, and the various design alterations of carrying out in the scope that does not break away from the invention main idea of putting down in writing in claims are included in the technical scope of the present invention.For example, in the above-described embodiment, adopted the core/shell type semiconductor-quantum-point of CdSe/ZnSe, but also can be by containing the visible ink printing security information of following core/shell type semiconductor-quantum-point.
(a) with the material that in the ZnSe nano particle, added Te as nuclear, with the core/shell type semiconductor-quantum-point of ZnS nano particle as shell;
(b) the core/shell type semiconductor-quantum-point is with the ZnS nano particle that contains the Mn ion core/shell type semiconductor-quantum-point as nuclear;
(c) by containing Zn
2+, In
3+And Ag
+The thiol complex thermal decomposition and the In that mixed
3+And Ag
+ZnS nano particle (Zn (1-2
x) In
xAg
xS) core/shell type semiconductor-quantum-point;
(d) nuclear contains the core/shell type semiconductor-quantum-point of the ZnS nano particle of Mn ion;
(e) with the core/shell type semiconductor-quantum-point of Zn-In-Ag-S based semiconductor nano particle as nuclear;
Or
(f) with the core/shell type semiconductor-quantum-point of silicon nano as nuclear or shell.
In addition, the core/shell type semiconductor-quantum-point that contains in the visible ink also can be following core/shell type semiconductor-quantum-point:
(g) with silicon nano as nuclear, with the core/shell type semiconductor-quantum-point of erbium as shell; Or
(h) with erbium as nuclear, with the core/shell type semiconductor-quantum-point of silicon nano as shell.The coefficient of thermal expansion of erbium is 7.6 * 10 in the time of 20 ℃
-6/ ℃, being equivalent in the time of 20 ℃ owing to this is 2.5 * 10
-6/ ℃ about 3 times of coefficient of thermal expansion of silicon, therefore adopting erbium is being most preferred aspect the displacement of the wavelength of realizing producing by expanding.
With silicon nano as nuclear, with the erbium nano particle during as shell, preferred silicon nano is that 1.9nm～4.3nm, erbium nano particle are 1.9nm～4.3nm.
Have again, for with silicon nano as nuclear, with the semiconductor-quantum-point of erbium nano particle as shell, if this semiconductor-quantum-point is being dispersed in the water, after 22 ℃～90 ℃ scopes are with the water temperature heating, the exciting light of illumination wavelength 325nm, then affirmation can be sent the light of wavelength 720～740nm from semiconductor-quantum-point.
In addition, with the erbium nano particle as nuclear, with silicon nano during as shell, preferred erbium nano particle is that 1.9nm～4.3nm, silicon nano are 1.9nm～4.3nm.
Have again, for with the erbium nano particle as nuclear, with the semiconductor-quantum-point of silicon nano as shell, if this semiconductor-quantum-point is being dispersed in the water, after 22 ℃～90 ℃ scopes are with the water temperature heating, the exciting light of illumination wavelength 325nm, then affirmation can be sent the high light of wavelength 720～740nm from semiconductor-quantum-point.
In addition, if form will the adopt surface doping silicon nano of oxygen or inner oxidized silicon oxide nanoparticle as nuclear or shell, employing erbium core/shell type semiconductor-quantum-point as shell or nuclear, the stronger light of radiation then, so be preferred.
In addition, as with the core/shell type semiconductor-quantum-point of silicon nano, also can adopt a plurality of alkyl and each Si atom in the silicon nano to combine and cover the semiconductor-quantum-point of Si atomic surface with alkyl as nuclear.This semiconductor-quantum-point can prevent the reduction of emission wavelength and luminescence efficiency, can send visible light by ultraviolet ray excited.In addition, can be according to Mg
2Si and SiCl
4The reaction conditions of (silicon tetrachloride) is adjusted particle diameter, is preferred therefore.
The present invention can also be used to follow the trail of the reading of visual information of the trackability of goods project except can be used in the true and false of judging various cards.Have, the present invention does not get rid of with the light source of semiconductor laser diode as exciting light again.
Utilizability on the industry
The present invention can prevent card or certificate forgery, forge and distort, can carry out simultaneously the miniaturization of system and save spatialization, can realize non-visible trackability, can extensively contribute to the field that needs information to keep.
Claims (12)
1. information pattern carrier, it possesses to use the information pattern that the coloring printing ink contain the core/shell type semiconductor-quantum-point forms and cover and is formed on this information pattern and with the mask of this non-visibleization of information pattern, described information pattern carrier is characterised in that: the constituting of described information pattern: at irradiation energy during than the high excitation line of the band gap of described semiconductor-quantum-point, and the light of the wavelength that described semiconductor-quantum-point thermal expansion and sending has had to the long wavelength side displacement.
2. information pattern carrier, it possesses information pattern, described information pattern is to use the coloring printing ink that contains the core/shell type semiconductor-quantum-point to form, and the identical color of color of background color by formation and information recording carrier or management object thing or substrate dyed layer and by non-visibleization, described information pattern carrier is characterised in that: the constituting of described information pattern: at irradiation energy during than the high excitation line of the band gap of described semiconductor-quantum-point, and the light of the wavelength that described semiconductor-quantum-point thermal expansion and sending has had to the long wavelength side displacement.
3. information pattern carrier according to claim 1 and 2 is characterized in that: described coloring printing ink is that any coloured material in the pigment of sub-micron is painted by dyestuff, leuco dye or particle diameter.
4. according to each described information pattern carrier in the claim 1～3, it is characterized in that: described core/shell type semiconductor-quantum-point with CdSe/ZnS as nuclear.
5. according to each described information pattern carrier in the claim 1～4, it is characterized in that: described core/shell type semiconductor-quantum-point is any in following (a)～(f):
(a) with the material that in the ZnSe nano particle, added Te as nuclear, with the ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xAg
xS) as nuclear or shell;
(c) with the ZnS nano particle that contains the Mn ion as nuclear;
(d) with the ZnS nano particle as nuclear;
(e) with Zn-In-Ag-S based semiconductor nano particle as nuclear;
(f) with silicon nano as nuclear or shell.
6. according to each described information pattern carrier in the claim 1～4, it is characterized in that: described core/shell type semiconductor-quantum-point is any among following (g), (h):
(g) with silicon nano as nuclear, with erbium as shell;
(h) with erbium as nuclear, with silicon nano as shell.
7. optical reading method, it is the optical reading method of information pattern, described information pattern is to use the coloring printing ink that contains the core/shell type semiconductor-quantum-point and is formed on information recording carrier or the management object thing, and by forming mask thereon by non-visibleization, described optical reading method is characterised in that: the excitation line by higher than the band gap of described semiconductor-quantum-point to described information pattern irradiation energy makes described semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point after this thermal expansion sends the light of the wavelength that has had to the long wavelength side displacement; By to this displacement the long wavelength side optical sensor that partly has sensitivity accept the described light that sends, and read described information pattern.
8. optical reading method, it is the optical reading method of information pattern, described information pattern is to be formed on information recording carrier or the management object thing by the coloring printing ink that use contains the core/shell type semiconductor-quantum-point, and by forming the color identical with the color of its background color or substrate dyed layer by non-visibleization, described optical reading method is characterised in that: the excitation line by higher than the band gap of described semiconductor-quantum-point to described information pattern irradiation energy makes described semiconductor-quantum-point thermal expansion; Semiconductor-quantum-point after this thermal expansion sends the light of the wavelength that has had to the long wavelength side displacement; By to this displacement the long wavelength side optical sensor that partly has sensitivity accept the described light that sends, and read described information pattern.
9. according to claim 7 or 8 described optical reading methods, it is characterized in that: described coloring printing ink is that any coloured material in the pigment of sub-micron is painted by dyestuff, leuco dye or particle diameter.
10. according to each described optical reading method in the claim 7～9, it is characterized in that: described core/shell type semiconductor-quantum-point with CdSe/ZnS as nuclear.
11. according to each described optical reading method in the claim 7～10, it is characterized in that: described core/shell type semiconductor-quantum-point is any in following (a)～(f):
(a) with the material that in the ZnSe nano particle, added Te as nuclear, with the ZnS nano particle as shell;
(b) with (Zn (1-2
x) In
xAg
xS) as nuclear or shell;
(c) with the ZnS nano particle that contains the Mn ion as nuclear;
(d) with the ZnS nano particle as nuclear;
(e) with Zn-In-Ag-S based semiconductor nano particle as nuclear;
(f) with silicon nano as nuclear or shell.
12. according to each described optical reading method in the claim 7～10, it is characterized in that: described core/shell type semiconductor-quantum-point is any among following (g), (h):
(g) with silicon nano as nuclear, with erbium as shell;
(h) with erbium as nuclear, with silicon nano as shell.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-009302 | 2009-01-19 | ||
| JP2009009302 | 2009-01-19 | ||
| JP2009-150802 | 2009-06-25 | ||
| JP2009150802 | 2009-06-25 | ||
| PCT/JP2010/050412 WO2010082625A1 (en) | 2009-01-19 | 2010-01-15 | Information pattern carrier and method for optically reading information pattern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102282568A true CN102282568A (en) | 2011-12-14 |
| CN102282568B CN102282568B (en) | 2014-06-11 |
Family
ID=42339879
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|---|---|---|---|
| CN201080004704.6A Expired - Fee Related CN102282568B (en) | 2009-01-19 | 2010-01-15 | Information pattern carrier and method for optically reading information pattern |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5339382B2 (en) |
| CN (1) | CN102282568B (en) |
| HK (1) | HK1162723A1 (en) |
| WO (1) | WO2010082625A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105882184A (en) * | 2014-11-05 | 2016-08-24 | 北京印刷学院 | Anti-fake method for displaying hidden red, green and yellow graphical and textual information on orange printing substrate |
| CN106250955A (en) * | 2015-06-05 | 2016-12-21 | 英派尔科技开发有限公司 | Solid-state bar code and their preparation and application |
| CN106928776A (en) * | 2017-04-24 | 2017-07-07 | 于军胜 | A kind of water base nano silver wire conductive ink containing luminescent quantum dot |
| CN107305776A (en) * | 2016-04-18 | 2017-10-31 | 中国科学院化学研究所 | A kind of information recording method and information transmitting methods using photonic crystal as carrier |
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| JP6164637B2 (en) * | 2013-03-22 | 2017-07-19 | 国立大学法人名古屋大学 | Fluorescent probe for labeling biological samples |
| CN112969594B (en) * | 2018-10-31 | 2023-03-24 | 韩国机械研究院 | Structural colored substrate, method of manufacturing structural colored substrate, and security verification system using structural colored substrate manufactured thereby |
| CN110456071B (en) * | 2019-08-01 | 2023-01-13 | 济南大学 | Preparation method of electrochemical luminescence sensor for detecting N-terminal brain natriuretic peptide precursor by quantum dot functionalized metal organic framework structure |
| DE102019216003B4 (en) * | 2019-10-17 | 2022-04-07 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Optical security feature suitable for Track & Trace and/or serialization systems |
| WO2021161860A1 (en) * | 2020-02-10 | 2021-08-19 | 三菱ケミカル株式会社 | Composition containing semiconductor nanoparticles, color filter, and image display device |
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Also Published As
| Publication number | Publication date |
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| HK1162723A1 (en) | 2012-08-31 |
| JP5339382B2 (en) | 2013-11-13 |
| CN102282568B (en) | 2014-06-11 |
| WO2010082625A1 (en) | 2010-07-22 |
| JPWO2010082625A1 (en) | 2012-07-05 |
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