CN108369302A - Reflection-type anti false film - Google Patents
Reflection-type anti false film Download PDFInfo
- Publication number
- CN108369302A CN108369302A CN201680071577.9A CN201680071577A CN108369302A CN 108369302 A CN108369302 A CN 108369302A CN 201680071577 A CN201680071577 A CN 201680071577A CN 108369302 A CN108369302 A CN 108369302A
- Authority
- CN
- China
- Prior art keywords
- reflection
- type anti
- anti false
- false film
- reflective membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/203—Filters having holographic or diffractive elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- 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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—Homopolymers or copolymers of vinyl chloride
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
- C09D133/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0252—Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Credit Cards Or The Like (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
- Holo Graphy (AREA)
Abstract
Reflection-type anti false film includes the basement membrane for being formed with identification pattern above；And be formed on the basement membrane along the molded line of identification pattern, the reflective membrane of diffraction pattern can be shown from the external incident light by reflecting.Therefore, reflection-type anti false film can be such that incident light penetrates to show diffraction pattern.
Description
Technical field
The present invention relates to reflection-type anti false films.It can be effectively prevented identification pattern more particularly, to one kind
The reflection-type anti false film being replicated.
Background technology
The forgery behavior of the expensive articles such as software, CD, DVD, marketable securities, foreign wine, drug has become prodigious society and asks
Topic.The article for forging production largely has low-quality, therefore corresponding enterprise can pay due to this forgery behavior by losing
It is a large amount of to make great efforts the greatly damage such as obtained reliability.To solve this forgery problem, many enterprises are dedicated to preventing counterfeit
Circulation, such as be applicable on product the technology for being not easy to forge or judge genuine piece and counterfeit technology.
There is hologram (hologram) to prevent forgery to be suitable for the typical of product.Hologram is to have recorded reproduction to stand
The medium of the interference fringe of body image is made using holography principle.However, the information that hologram can record is limited,
Therefore with being difficult to manufacture exquisite hologram the problem of.This problem with digital scanner etc hologram replication mechanism
It is more highlighted etc. being replicated.
Therefore, a kind of technology recording information on anti false film by nano-imprinting method has recently been proposed.Nano impression
Method is the method that diffraction pattern is formed on anti false film using the mold with nano-pattern, since low expense can be used to record
Bulk information, therefore recently using extensive.
In general, anti false film makes to irradiate and penetrate to straight trip direction internal laser to scheduled direction diffraction.Therefore, Xiang Zhi
The laser that line direction is irradiated to anti false film shows security pattern after through anti false film by being diffracted the light of pattern diffraction.
But the infiltration type anti false film has the problem of being difficult to the product of various shapes suitable for including three-dimensional bits.
Also, infiltration type anti false film itself should integrally ensure translucency, therefore the material for constituting the infiltration type anti false film is limited.
Invention content
Technical problem
For this purpose, the restriction in terms of it is an object of the present invention to provide a kind of translucency solving infiltration type anti false film
Reflection-type anti false film.
It is an object of the present invention to provide the manufacturers for the reflection-type anti false film for capableing of easy to manufacture reflection-type anti false film
Method.
Technical solution
To reach above-mentioned purpose, the anti false film of one embodiment of the present of invention includes：It is formed with identification figure above
The basement membrane of case；And be formed on the basement membrane along the molded line of identification pattern, it can be by reflecting from described
External incident light shows the reflective membrane of diffraction pattern.
According to one embodiment of present invention, the reflective membrane may include anti-selected from being made of gold, silver, aluminium, chromium and nickel
At least one of photosensitiveness metal group.
According to one embodiment of present invention, can also include：It covers the reflective membrane and protects the blunt of the reflective membrane
Change film.
Wherein, the passivating film may include selected from by polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), poly- pair
At least the one of the translucent resin group that ethylene terephthalate (PET), polypropylene (PT), acrylic acid and epoxy resin are constituted
Kind.
Also, can identification pattern described in the adjustable refractive index according to the passivating film offset.
The manufacturing method of reflection-type anti false film according to an embodiment of the invention prepares to be formed with identification above
With the basement membrane of pattern.Later, formed on the basement membrane along the molded line of the identification pattern can by reflection from
The external incident light is to show the reflective membrane of diffraction pattern.
According to one embodiment of present invention, the basement membrane can pass through hot pressing engineering, nano impression engineering or trans-printing
Engineering is formed.
According to one embodiment of present invention, the reflective membrane can pass through atomic layer deposition engineering, sputtering engineering or ion
Beam engineering is formed.
According to one embodiment of present invention, the passivation for covering the reflective membrane and the protection reflective membrane can also be formed
Film.
Technique effect
According to the present invention, it is different from existing infiltration type anti false film, reflection-type anti false film can be attached to including three-dimensional bits
Various shapes product.That is, existing infiltration type anti false film shows identification through the product using light through light
With figure, therefore the infiltration type anti false film is difficult to be utilized in the case that the product is opaque, and the embodiment of the present invention
Reflection-type anti false film has the advantages that use aspects are not limited by the various shapes or material that are attached to product.
Also, due to the passivating film for being also formed with covering reflective membrane, anti false film can be inhibited to be replicated.
Description of the drawings
Fig. 1 is the sectional view for the reflection-type anti false film for illustrating one embodiment of the present of invention；
Fig. 2 is the sectional view for the reflection-type anti false film for illustrating one embodiment of the present of invention；
Fig. 3 is the flow chart of the manufacturing method for the reflection-type anti false film for illustrating one embodiment of the present of invention.
Specific implementation mode
Hereinafter, the embodiment of the present invention is described in detail with reference to appended attached drawing.The present invention can apply a variety of changes
More, there can be variform, illustrate specific embodiment in the accompanying drawings and be described in detail.But this is not intended to handle
The present invention is defined in specific open form, it should be understood that having altered, is equivalent in thought and technical scope including the present invention
Object or even sub.In appended attached drawing, the size and amount of object be in order to clearly state the present invention and compare practical amplification or
Reduce display.
First, second equal terms can be used for illustrating a variety of inscapes, but the inscape is not only restricted to the term.
The use purpose of the term is that an inscape is made to distinguish over other inscapes.For example, not departing from the present invention's
Under the premise of interest field, the first inscape can be named as the second inscape, and similarly, the second inscape can order
Entitled first inscape.
Term used herein uses in order to illustrate specific embodiment, purpose and the non-limiting present invention.
If clearly being limited without other in text, the performance of odd number further includes the performance of plural number.It should be understood that the " comprising " in the application or " tool
Have " etc. terms for specified feature there are described in specification, step, function, inscape or combinations thereof, and and it is non-predetermined
Exclude other features or step, function, inscape or combinations thereof there is a possibility that or it is additional.
In addition, in the case of other no definition, all arts used herein including technology or scientific terminology
Language indicates the meaning identical with the general understanding of the those skilled in the art of the technical field of the invention.The dictionary generally used is fixed
The term of justice excessively should be interpreted that the meaning consistent with looking like possessed by the context of the relevant technologies, and there in the application to be clearly fixed
Under the premise of justice, it is not construed as ideal or excessively formality the meaning.
Fig. 1 is the sectional view for the reflection-type anti false film for illustrating one embodiment of the present of invention.
Referring to Fig.1, the reflection-type anti false film 100 of one embodiment of the present of invention includes basement membrane 110 and reflective membrane 120.Institute
Reflection-type anti false film 100 is stated so that being reflected from external incident laser by the reflective membrane, the phase of reflected light becomes
Change and causes to interfere.Therefore, it is possible to show special pattern with interfering.Here, special pattern can be equivalent to
Identification figure.
The basement membrane 110 can be made of polymer substance.Also, the another side of the basement membrane 110 is formed with two sides stickup
Band can be configured to the basement membrane 110 are attached to specific products.
The basement membrane 110 is formed with identification pattern on one side.The identification pattern can have a variety of big
Small and shape.For example, the shape of the identification pattern may include shape of stripes, mosaic shape, Pyramid etc..
The identification can be formed with pattern by hot pressing engineering, nano impression engineering or trans-printing engineering.
The reflective membrane 120 is formed in along the molded line of identification pattern on the basement membrane 110.Therefore, institute
It states reflective membrane 120 and may be formed to have uniform thickness.The reflective membrane 120, which can reflect to show from the external incident light, to spread out
Penetrate figure.
The reflective membrane 120 may include the reflective metallics of gold, silver, aluminium, chromium and nickel etc.The reflective membrane 120
It can be with the thickness of 5nm to 500nm.
The reflective membrane 120 is made by the offset being formed on the identification pattern in the reflective membrane 120
The phase of light of surface reflection change.Therefore, it is possible to show specific diffraction by interfering for the light of the reflection
Figure.The specific diffraction pattern can for example be equivalent to identification figure or Quick Response Code (QR code).
According to one embodiment of present invention, it is different from existing infiltration type anti false film, the reflection-type anti false film 100 can
It is attached to the product of the various shapes including three-dimensional bits.That is, existing infiltration type anti false film penetrates the saturating of the product by light
It crosses light and shows identification figure, therefore be difficult to use in the case that the product is opaque anti-fake using the infiltration type
Film.
Reverse side, the reflection-type anti false film 100 of the embodiment of the present invention have use aspects not by being attached to a variety of of product
The advantages of limitation of shape or material.
Fig. 2 is the sectional view for the reflection-type anti false film for illustrating one embodiment of the present of invention.
With reference to Fig. 2, the reflection-type anti false film 200 of one embodiment of the present of invention includes basement membrane 210, reflective membrane 220 and blunt
Change film 230.The reflection-type anti false film 200 to be reflected by the reflective membrane from external incident laser, reflected light
Phase changes and causes to interfere.Therefore, it is possible to show special pattern with interfering.Here, specific pattern
Shape can be equivalent to identification figure.
The passivating film 230 is disposed over the reflective membrane 220.Therefore, the passivating film 230 can be protected described reflective
Film 220 and identification pattern are in order to avoid by external impact.Also, the passivating film 230 is whole to cover the identification
With pattern, so as to inhibit anti false film 200 to be replicated.The passivating film 230 is arranged to fill the identification pattern
Between gap.
The passivating film 230 can be by polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), poly terephthalic acid
Any one formation in the translucent resin that glycol ester (PET), polypropylene (PT), acrylic acid and epoxy resin are constituted.
Wherein, can identification pattern described in the adjustable refractive index according to the passivating film 230 offset.That is, can root
The size and shape of identification pattern are adjusted according to the value of the refractive index of the passivating film 230.
In the case that the one side of the passivating film 230 is contacted with reflective membrane 220 and another side exposes, the passivating film 230
Another side can be flat.
Fig. 3 is the flow chart of the manufacturing method for the reflection-type anti false film for illustrating one embodiment of the present of invention.
Referring to figs. 1 to Fig. 3, the manufacturing method of reflection-type anti false film according to an embodiment of the invention prepares first
It is formed with the basement membrane (S110) of identification pattern above.About the identification pattern, formed on preparation basement membrane
Identification pattern is to form basement membrane.The identification pattern can pass through hot pressing engineering, nano impression engineering or transfer
Printing engineering is formed.
Further, being formed on the basement membrane along the molded line of the identification pattern to reflect from outside
The light penetrated shows the reflective membrane (S120) of diffraction pattern.The reflective membrane can pass through atomic layer deposition engineering, sputtering engineering
Or ion beam engineering is formed.
The reflective membrane can utilize the reflective metallics of gold, silver, aluminium, chromium and nickel etc to be formed.The reflective membrane can
It is formed to have the thickness of 5nm to 500nm.
According to one embodiment of present invention, the passivation for covering the reflective membrane and the protection reflective membrane can also be formed
Film (, S130).
The passivating film can be by polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), poly terephthalic acid second two
Any one formation in the translucent resin that alcohol ester (PET), polypropylene (PT), acrylic acid and epoxy resin are constituted.
Wherein, can identification pattern described in the adjustable refractive index according to the passivating film offset.That is, can according to institute
The value for stating the refractive index of passivating film adjusts the size and shape of identification pattern.
Industrial applicability
The reflection-type anti false film of the embodiment of the present invention is applicable to prevent software, CD, DVD, marketable securities, foreign wine, medicine
Product etc. prevent the forgery or adulterium of the product.
The present invention as above illustrates and illustrates preferred embodiment, but the present invention is not limited to the embodiment, the present invention
Person of an ordinary skill in the technical field can carry out various deformation and change in the range of not departing from the thought of the present invention,
These variations and modification should be regarded as being contained in the present invention and scope of the appended claims.
Claims (9)
1. a kind of reflection-type anti false film, including：
It is formed with the basement membrane of identification pattern above；And
It is formed on the basement membrane along the molded line of identification pattern, it can be by reflecting from the external incidence
Light shows the reflective membrane of diffraction pattern.
2. reflection-type anti false film according to claim 1, wherein
The reflective membrane includes at least one selected from the reflective metal group being made of gold, silver, aluminium, chromium and nickel.
3. reflection-type anti false film according to claim 1, further includes：
Cover the passivating film of the reflective membrane and the protection reflective membrane.
4. reflection-type anti false film according to claim 3, wherein
The passivating film includes selected from by polyvinyl chloride, polymethyl methacrylate, polyethylene terephthalate, poly- third
At least one for the translucent resin group that alkene, acrylic acid and epoxy resin are constituted.
5. reflection-type anti false film according to claim 3, wherein
According to the offset of identification pattern described in the adjustable refractive index of the passivating film.
6. a kind of manufacturing method of reflection-type anti false film, including：
The step of preparing to be formed with the basement membrane of identification pattern above；And
Being formed on the basement membrane along the molded line of the identification pattern can be by reflecting from the external incidence
The step of reflective membrane of the light to show diffraction pattern.
7. the manufacturing method of reflection-type anti false film according to claim 6, wherein
The step of preparing the basement membrane executes hot pressing engineering, nano impression engineering or trans-printing engineering.
8. the manufacturing method of reflection-type anti false film according to claim 6, wherein
The step of forming the reflective membrane executes atomic layer deposition engineering, sputtering engineering or ion beam engineering.
9. the manufacturing method of reflection-type anti false film according to claim 6, further includes：
Form the step of covering the reflective membrane and the passivating film of the protection reflective membrane.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160051502A KR101890983B1 (en) | 2016-04-27 | 2016-04-27 | Method of manufacturing a reflect-type film for preventing counterfeit |
| KR10-2016-0051502 | 2016-04-27 | ||
| PCT/KR2016/014274 WO2017188542A1 (en) | 2016-04-27 | 2016-12-07 | Reflective-type film for preventing counterfeiting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108369302A true CN108369302A (en) | 2018-08-03 |
Family
ID=60159734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680071577.9A Pending CN108369302A (en) | 2016-04-27 | 2016-12-07 | Reflection-type anti false film |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2019522227A (en) |
| KR (1) | KR101890983B1 (en) |
| CN (1) | CN108369302A (en) |
| WO (1) | WO2017188542A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023003125A1 (en) * | 2021-07-19 | 2023-01-26 | (주) 나노메카 | Transmissive diffractive optical device, film comprising same, and method for manufacturing film |
| WO2023003124A1 (en) * | 2021-07-19 | 2023-01-26 | (주) 나노메카 | Reflective diffractive optical element, film comprising same, and manufacturing method therefor |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101949313B1 (en) | 2018-05-18 | 2019-02-19 | 주식회사 에임 | Method for manufacturing of three dimensional film having copy protection structure |
| KR102281698B1 (en) * | 2019-04-29 | 2021-07-26 | 고려대학교 산학협력단 | Anti-counterfeit film with multi-phase and manufacturing method by the same |
| KR102214523B1 (en) * | 2019-07-31 | 2021-02-10 | (주) 나노메카 | Film structure for preventing counterfeit |
| KR102263833B1 (en) * | 2019-09-09 | 2021-06-11 | 주식회사 와이즈가드 | Optical functional pattern structure having optical refleting layer |
| KR102117792B1 (en) * | 2019-11-15 | 2020-06-09 | 주식회사 와이즈가드 | Light source device |
| KR102218537B1 (en) | 2020-01-22 | 2021-02-22 | 주식회사 지케이씨 | Method for manufacturing of three dimensional sheet having copy protection structure |
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2016
- 2016-04-27 KR KR1020160051502A patent/KR101890983B1/en active IP Right Grant
- 2016-12-07 JP JP2018554022A patent/JP2019522227A/en active Pending
- 2016-12-07 WO PCT/KR2016/014274 patent/WO2017188542A1/en active Application Filing
- 2016-12-07 CN CN201680071577.9A patent/CN108369302A/en active Pending
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|---|---|---|---|---|
| WO2023003125A1 (en) * | 2021-07-19 | 2023-01-26 | (주) 나노메카 | Transmissive diffractive optical device, film comprising same, and method for manufacturing film |
| WO2023003124A1 (en) * | 2021-07-19 | 2023-01-26 | (주) 나노메카 | Reflective diffractive optical element, film comprising same, and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101890983B1 (en) | 2018-08-27 |
| JP2019522227A (en) | 2019-08-08 |
| WO2017188542A1 (en) | 2017-11-02 |
| KR20170122888A (en) | 2017-11-07 |
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Application publication date: 20180803 |