CN109087577A - A kind of method and device for producing volume holographic anti-counterfeiting mark in batches - Google Patents
A kind of method and device for producing volume holographic anti-counterfeiting mark in batches Download PDFInfo
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- CN109087577A CN109087577A CN201811172702.2A CN201811172702A CN109087577A CN 109087577 A CN109087577 A CN 109087577A CN 201811172702 A CN201811172702 A CN 201811172702A CN 109087577 A CN109087577 A CN 109087577A
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- photosensitive recording
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010410 layer Substances 0.000 claims abstract description 48
- 210000002469 basement membrane Anatomy 0.000 claims abstract description 40
- 230000001427 coherent effect Effects 0.000 claims abstract description 29
- 239000012790 adhesive layer Substances 0.000 claims abstract description 25
- 238000010923 batch production Methods 0.000 claims abstract description 17
- 238000004804 winding Methods 0.000 claims abstract description 14
- 210000004379 membrane Anatomy 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 11
- 238000007711 solidification Methods 0.000 claims abstract description 9
- 230000008023 solidification Effects 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 4
- -1 basement membrane Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 59
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/0005—Adaptation of holography to specific applications
- G03H1/0011—Adaptation of holography to specific applications for security or authentication
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/024—Hologram nature or properties
- G03H1/0248—Volume holograms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Holo Graphy (AREA)
Abstract
The present invention provides a kind of batch production volume holographic Anti-fake marking device, comprising: surface holographic mother, folding and unfolding film coiling roller, duplication roller, exposure system；Surface holographic mother has relief grating structure, and relief grating structure surface offers periodical oblique angle；Folding and unfolding film coiling roller includes winder winding up roller and puts film coiling roller, is used for folding and unfolding membrane system, membrane system includes the photosensitive recording medium film for being coated with the basement membrane of releasing layer and adhesive layer and being arranged in releasing layer；Duplication roller cooperates winder winding up roller and puts film coiling roller rotation for carrying the surface holographic mother, so that there is surface holographic mother the side of relief grating structure and the adhesive layer of basement membrane to bond；Exposure system includes pre-exposure radiant, laser interference system and ultra-violet curing light source, is fixed for carrying out pre-exposure, coherent interference record information and solidification to photosensitive recording medium film.A kind of method producing volume holographic anti-counterfeiting mark is also provided.Above-mentioned apparatus and method can improve the anti-counterfeiting performance and production efficiency of volume holographic anti-counterfeiting mark.
Description
Technical field
The present invention relates to field of anti-counterfeit technology more particularly to a kind of methods and dress for producing volume holographic anti-counterfeiting mark in batches
It sets.
Background technique
Antifalsification label, which refers to, to be transferred in the packaging or adjunct of product by modes such as stickup, printing, thermal transfers, and
Play the mark of anti-fake effect.Current existing anti-counterfeiting mark has laser holographic mark, printing counterfeit prevention mark, two dimensional code, system
It traces to the source.Wherein laser holographic mark includes that surface hologram marking and volume holographic identify two kinds, and surface hologram marking is due to being easy to
Identify, can be identified under natural lighting environment, ornamental value is strong, can industrialized production and be widely used to promote, but due to
Its surface texture is exposed, it is easy to which by fraud, quotient is replicated.And the method that volume holographic is identified by laser coherence interference exists
Interference fringe is formed in photosensitive recording medium body, has surface holography readily identified, while ornamental value strong advantage, well
It avoids and is easy to the shortcomings that being replicated fraud.But due to technology and cost problem, it is constantly subjected to limit.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of batch production volume holographic that can improve anti-counterfeiting performance is anti-fake
The method and device of mark.In order to solve the above technical problems, one technical scheme adopted by the invention is that:
A kind of batch production volume holographic Anti-fake marking device, comprising: surface holographic mother, duplication roller, exposes at folding and unfolding film coiling roller
Photosystem；
The surface holographic mother has relief grating structure, and the relief grating structure surface offers periodically tiltedly
Angle；
The folding and unfolding film coiling roller includes winder winding up roller and puts film coiling roller, is used for folding and unfolding membrane system, wherein membrane system include be coated with from
The basement membrane of shape layer and adhesive layer and the photosensitive recording medium film being arranged in releasing layer；
The duplication roller cooperates the winder winding up roller and puts film coiling roller rotation for carrying the surface holographic mother,
So that there is the surface holographic mother side of relief grating structure and the adhesive layer of basement membrane to bond；
The exposure system includes pre-exposure radiant, laser interference system and ultra-violet curing light source, for photosensitive recording
Deielectric-coating carries out pre-exposure, coherent interference record information and solidification fixing.
The material of the surface holographic mother is metal film, the thickness of the metal film in one of the embodiments,
Degree is 0.1mm~1mm.
The relief grating structure is formed on the metal film reflecting surface in one of the embodiments, described floating
Carving optical grating construction is at least one of sinusoidal grating, rectangular raster or balzed grating,.
In one of the embodiments, the relief grating structure be tool there are two types of and two or more different optical grating constructions,
The screen periods of every kind of optical grating construction are different, grating depth is different and/or the oblique angle on grating inclined-plane is different.
The a cycle length at the oblique angle is 0.1 μm~100 μm in one of the embodiments, the angle at the oblique angle
Degree is~20 °~20 °, and the grating depth is 0.3 μm~10 μm.
The duplication roller diameter is 100mm~500mm, the duplication roller linear velocity in one of the embodiments,
For 5m/min~50m/min.
The pre-exposure radiant is incoherent light green light LED light source or white light source, wavelength in one of the embodiments,
For 515nm~530nm, pre-exposure light quantity is 20mj/cm2~80mj/cm2.The laser interference system in one of the embodiments,
System includes coherent laser, expands filter element and beam collimation element.
In one of the embodiments,
The coherent laser is green light coherent laser, and wavelength is 515nm~530nm；Or
The coherent laser is blue laser, and wavelength is 405nm~475nm；Or
The coherent laser is red laser, and wavelength is 600nm~650nm.
A method of batch production volume holographic anti-counterfeiting mark is carried out using above-mentioned device, comprising:
Film coiling roller is put by first and broadcasts basement membrane, and releasing layer and adhesive layer are coated on the basement membrane；
Film coiling roller, which is put, by second broadcasts photosensitive recording medium film, the photosensitive recording medium film and the basement membrane side
Releasing layer is laminating；
Pre-exposure is carried out to the photosensitive recording medium film by pre-exposure radiant, to improve the photosensitive recording medium film
Sensitivity；
Surface holographic mother is surround and is tightly attached in duplication roller surface, and the surface holographic relief of the surface holographic mother
Optical grating construction is outwardly with the adhesive layer close adhesion with basement membrane；
Expanded and filtered by the laser that laser interference system issues laser, collimate after guide the duplication roller into
To carry out coherent light interference processing to the film layer on duplication roller；
Using ultra-violet curing light source to the photosensitive recording medium layer irradiating ultraviolet light after coherent light interference, it is fixed solidify
Shadow；
Releasing layer, basement membrane, adhesive layer are separated with photosensitive recording medium film layer by film collecting roller；And pass through third film discharging roller
Upper another layer of basement membrane, finished product winding are covered in the photosensitive recording medium film layer.
The beneficial effect of the application is: in above-mentioned apparatus and method, structure degree of integration is high, comprising putting film, photosensitive recording
Medium pre-exposure light processing converts surface hologram marking to volume holographic mark, solidification fixing and winds a series of complete processes.It will
Surface hologram marking batch is converted into volume holographic mark, efficiently solves the exposed surface relief structure of surface hologram marking easily quilt
The shortcomings that fraud quotient replicates, greatly improved the anti-counterfeiting performance of hologram marking.
Detailed description of the invention
Fig. 1 is the batch production volume holographic Anti-fake marking device structural scheme of mechanism of an embodiment；
Fig. 2 is the structural schematic diagram of the surface holographic mother of an embodiment；
Fig. 3 is the assembly of thin films after the surface holographic mother bonding on duplication roller of an embodiment
Schematic diagram；
Fig. 4 is the schematic diagram that coherent light interference occurs in membrane system and records information of an embodiment；
Fig. 5 is to cover upper another base again after the photosensitive recording medium layer of an embodiment is separated with basement membrane
The structural schematic diagram of film.
Specific embodiment
Referring to Fig. 1, the device of the batch production volume holographic anti-counterfeiting mark of an embodiment provided by the invention, including table
Face holographic mother, folding and unfolding film coiling roller, duplication roller, exposure system.
Wherein folding and unfolding film coiling roller puts film coiling roller 10 including first, and first puts film coiling roller 10 for broadcasting basement membrane, and second puts film
Winding up roller 11, for broadcasting photosensitive recording medium film.Wherein, release layer and adhesive layer has been respectively coated in two sides on basement membrane, it is preferable that
Bondline thickness is greater than or equal to the grating depth of the surface holographic mother, and maximum thickness is not more than 10 μm, and adhesive layer is
Transparent photosensitive colloid, preferred uv glue, the preferred PET film of basement membrane.Photosensitive recording medium film is laminating in the releasing layer of base membrane layer.
Preferably, photosensitive recording medium film is photopolymer film, and preferred Du Pont's photopolymer is excellent with a thickness of 5 μm -30 μm
Select 15 μm.
In one embodiment, releasing layer, adhesive layer and basement membrane are transparent, and the refraction of releasing layer, adhesive layer and basement membrane
Rate is same or similar with photosensitive recording medium film, and refraction effect occurs to influence volume holographic to avoid the light propagated in membrane system
The interference record effect of image.
In one embodiment, duplication roller 12 is used for load-bearing surface holographic mother 13, and folding and unfolding film coiling roller is cooperated to rotate, with
Make surface holographic mother 13 that there is the side of relief grating structure and the adhesive layer of basement membrane to bond.Surface holographic mother 13 is around tight
It is attached on duplication 12 surface of roller, surface holographic relief optical grating construction and adhesive layer close adhesion.In one embodiment, roller is replicated
12 diameter is 300mm, and duplication roller linear velocity is 5m/min~50m/min.
Relief grating structure be tool there are two types of and two or more different optical grating constructions, the screen periods of every kind of optical grating construction are not
The oblique angle on same, grating depth difference and/or grating inclined-plane is different.
The a cycle length at oblique angle is 0.1 μm~100 μm in one of the embodiments, and the angle at the oblique angle is
~20 °~20 °, the grating depth is 0.3 μm~10 μm.
It specifically, include two kinds of optical grating constructions with surface holographic mother in one embodiment referring to Fig. 2, specifically, the
One relief grating structure is balzed grating, and the period is 10 μm, and grating depth is 1 μm, and the second relief grating structure is balzed grating,
Period is 0.7 μm, and grating depth is 0.3 micron, and grating inclined-plane inclination angle is~20 °~20 °；Under conditions of illumination reproduces,
Observe two image channels.
It is the multilayer film after the surface holographic mother bonding on photosensitive recording medium described above and duplication roller referring to Fig. 3
It is schematic diagram.Surface holographic mother 13.Adhesive layer 31, basement membrane 32, releasing layer 33, photosensitive recording medium 34 are cascading,
Incident coherent laser beam 35 is irradiated multi-layered film body.It is inserted between photosensitive recording medium layer 34 and surface holographic mother 13
The purpose of adhesive layer 31 is to make the seamless close adhesion of the two, and basement membrane 32 is primarily as the substrate of adhesive layer 31.
In one embodiment, exposure system includes pre-exposure radiant 17, laser interference system 18 and ultra-violet curing light source
19, it is fixed for carrying out pre-exposure, coherent interference record information and solidification to photosensitive recording medium film.Pre-exposure radiant 17 and purple
Outer curing light source 19 is separately positioned on the left and right sides of duplication roller 12, and the top of duplication roller 12 is arranged in laser interference system 18.
In one embodiment, pre-exposure radiant 17 be incoherent light green light LED light source or white light source, to photosensitive note
Recording medium carries out pre-exposure, improves the sensitivity of photosensitive recording medium.The wavelength of pre-exposure radiant 17 is 515nm~530nm, in advance
Light exposure is 20mj/cm2~80mj/cm2, the preferred 50mj/cm of pre-exposure light quantity2, pre-exposure is mainly to improve photosensitive recording medium
Luminous sensitivity.The pre-exposure radiant can be white light source, be also possible to ultraviolet source.
In one embodiment, laser interference system 18 includes coherent laser 181, expands filter element 182 and light beam
Collimating element 183.The preferred green light coherent laser of coherent laser 181, wavelength are 515nm~530nm, it is preferable that transmitting
Wavelength is 530nm, can be continuous wave laser, is also possible to pulse laser；It can be solid state laser, be also possible to gas
Laser can be blue laser, can be red laser, be also possible to white light laser, wavelength is according to laser class
Type determines.It expands filter element 182 and the laser of laser emitting is expanded and filtered.Beam energy density is 0.35mj/
cm2~350mj/cm2.It is preferred that 200mj/cm2.Beam collimation element 183 to expand and filtered coherent laser beam carry out it is quasi-
Directly, and by light beam it guides to duplication roller 12.Interference record letter is carried out to the photosensitive recording medium film on duplication roller 12 to realize
Breath.Ultra-violet curing light source 19 carries out solidification fixing to the photosensitive recording medium irradiating ultraviolet light after coherent light interference.
Referring to Fig. 4, in one embodiment, due to seamless sticky between the surface of photosensitive recording medium 34 and 13 holographic mother 13
It closes, and releasing layer 33, bonding coat 31 and 32 refractive index of basement membrane and photosensitive recording medium film are same or similar, light is in internal communication
When without obvious deviation, so regarding an entirety 41 as.It is complete by surface when incident coherent laser beam 35 is 41 from air incidence to membrane system
The reflection of 13 band gap structure of mother matrix is ceased, forms object light light beam 42, incident coherent laser beam 35 is with object light light beam 42 in membrane system
Photosensitive recording medium film layer 34 in interfere, to form volume holographic grating inside photosensitive recording medium film layer 34.
In one embodiment, folding and unfolding film coiling roller further includes that the first winder winding up roller 14 and third put film coiling roller 15.Solidification is fixed
Basement membrane, adhesive layer are separated with photosensitive recording medium film layer, are then led to by the first winder winding up roller 14 by releasing layer by movie queen
It crosses third and puts film coiling roller 15 and put film, allow photosensitive recording medium film layer laminating new basement membrane again, wherein new basement membrane has been covered with
Release layer completes finished product winding finally by the second winder winding up roller 16.
Specifically, referring to Fig. 5, photosensitive recording medium 34 is laminating on another basement membrane 51 after the separation of releasing layer 33, basement membrane
51 are equipped with releasing layer 52.
A kind of method carrying out batch production volume holographic anti-counterfeiting mark using above-mentioned device is also provided, comprising:
Film coiling roller is put by first and broadcasts basement membrane, and releasing layer and adhesive layer are coated on the basement membrane；
Film coiling roller, which is put, by second broadcasts photosensitive recording medium film, the photosensitive recording medium film and the basement membrane side
Releasing layer is laminating；
Pre-exposure is carried out to the photosensitive recording medium film by pre-exposure radiant, to improve the photosensitive recording medium film
Sensitivity；
Surface holographic mother is surround and is tightly attached in duplication roller surface, and the surface holographic relief of the surface holographic mother
Optical grating construction is outwardly with the adhesive layer close adhesion with basement membrane；
Expanded and filtered by the laser that laser interference system issues laser, collimate after guide the duplication roller into
To carry out coherent light interference processing to the film layer on duplication roller；
Using ultra-violet curing light source to the photosensitive recording medium layer irradiating ultraviolet light after coherent light interference, it is fixed solidify
Shadow；
Releasing layer, basement membrane, adhesive layer are separated with photosensitive recording medium film layer by film collecting roller；And pass through third film discharging roller
Upper another layer of basement membrane, finished product winding are covered in the photosensitive recording medium film layer.
The beneficial effect of the application is: in above-mentioned apparatus and method, structure degree of integration is high, comprising putting film, photosensitive recording
Medium pre-exposure light processing converts surface hologram marking to volume holographic mark, solidification fixing and winds a series of complete processes.It will
Surface hologram marking batch is converted into volume holographic mark, efficiently solves the exposed surface relief structure of surface hologram marking easily quilt
The shortcomings that fraud quotient replicates, greatly improved the anti-counterfeiting performance of hologram marking.
Since the refractive index and photosensitive recording medium film of the releasing layer of selection, bonding coat and basement membrane are same or similar.Therefore
Apparent refraction effect does not occur for the light propagated in multi-layered film body, to not influence the interference record effect of volume holographic image.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field is included within the scope of the present invention.
Claims (10)
1. a kind of batch production volume holographic Anti-fake marking device, comprising: surface holographic mother, folding and unfolding film coiling roller, duplication roller, exposure
System；It is characterized in that,
The surface holographic mother has relief grating structure, and the relief grating structure surface offers periodical oblique angle；
The folding and unfolding film coiling roller includes winder winding up roller and puts film coiling roller, is used for folding and unfolding membrane system, wherein membrane system includes being coated with releasing layer
And adhesive layer basement membrane and the photosensitive recording medium film that is arranged in releasing layer；
The duplication roller cooperates the winder winding up roller and puts film coiling roller rotation for carrying the surface holographic mother, so that
There is the surface holographic mother side of relief grating structure and the adhesive layer of basement membrane to bond；
The exposure system includes pre-exposure radiant, laser interference system and ultra-violet curing light source, for photosensitive recording medium
Film carries out pre-exposure, coherent interference record information and solidification fixing.
2. batch production volume holographic Anti-fake marking device according to claim 1, which is characterized in that the surface is holographic female
Version material be metal film, the metal film with a thickness of 0.1mm~1mm.
3. batch production volume holographic Anti-fake marking device according to claim 2, which is characterized in that the relief grating knot
It is configured on the metal film reflecting surface, the relief grating structure is in sinusoidal grating, rectangular raster or balzed grating,
At least one.
4. batch production volume holographic Anti-fake marking device according to claim 3, which is characterized in that the relief grating knot
Structure be tool there are two types of and two or more different optical grating constructions, the screen periods of every kind of optical grating construction are different, grating depth is different and/
Or the oblique angle on grating inclined-plane is different.
5. batch production volume holographic Anti-fake marking device according to claim 3, which is characterized in that one of the oblique angle
Cycle length is 0.1 μm~100 μm；The angle at the oblique angle is~20 °~20 °, and the grating depth is 0.3 μm~10 μm.
6. batch production volume holographic Anti-fake marking device according to claim 1, which is characterized in that the duplication roller diameter
For 100mm~500mm, the duplication roller linear velocity is 5m/min~50m/min.
7. batch production volume holographic Anti-fake marking device according to claim 1, which is characterized in that the pre-exposure radiant
For incoherent light green light LED light source or white light source, wavelength is 515nm~530nm, and pre-exposure light quantity is 20mj/cm2~80mj/
cm2。
8. batch production volume holographic Anti-fake marking device according to claim 1, which is characterized in that the laser interference system
System includes coherent laser, expands filter element and beam collimation element.
9. batch production volume holographic Anti-fake marking device according to claim 1, which is characterized in that the coherent laser
For green light coherent laser, wavelength is 515nm~530nm；Or
The coherent laser is blue laser, and wavelength is 405nm~475nm；Or
The coherent laser is red laser, and wavelength is 600nm~650nm.
10. a kind of side for carrying out batch production volume holographic anti-counterfeiting mark using device described in any one of claim 1 to 9
Method, comprising:
Film coiling roller is put by first and broadcasts basement membrane, and releasing layer and adhesive layer are coated on the basement membrane；
Film coiling roller is put by second and broadcasts photosensitive recording medium film, and the photosensitive recording medium film is with the basement membrane side from shape
Layer is laminating；
Pre-exposure is carried out to the photosensitive recording medium film by pre-exposure radiant, to improve the spirit of the photosensitive recording medium film
Sensitivity；
Surface holographic mother is surround and is tightly attached in duplication roller surface, and the surface holographic relief grating of the surface holographic mother
Structure is outwardly with the adhesive layer close adhesion with basement membrane；
Expanded and filtered by the laser that laser interference system issues laser, collimate after guide the duplication roller into right
The film layer replicated on roller carries out coherent light interference processing；
Using ultra-violet curing light source to the photosensitive recording medium layer irradiating ultraviolet light after coherent light interference, solidification fixing is carried out；
Releasing layer, basement membrane, adhesive layer are separated with photosensitive recording medium film layer by film collecting roller；And by third film discharging roller in institute
It states photosensitive recording medium film layer and covers upper another layer of basement membrane, finished product winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172702.2A CN109087577A (en) | 2018-10-09 | 2018-10-09 | A kind of method and device for producing volume holographic anti-counterfeiting mark in batches |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811172702.2A CN109087577A (en) | 2018-10-09 | 2018-10-09 | A kind of method and device for producing volume holographic anti-counterfeiting mark in batches |
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| CN109709637A (en) * | 2019-03-08 | 2019-05-03 | 上海宏盾防伪材料有限公司 | Method and device for making a hybrid light-changing device |
| CN109767725A (en) * | 2019-03-19 | 2019-05-17 | 京东方科技集团股份有限公司 | A kind of pixel-driving circuit and its driving method, display device |
| CN115176182A (en) * | 2020-08-25 | 2022-10-11 | 株式会社Lg化学 | Method for replicating large-scale holographic optical elements and large-scale holographic optical elements replicated thereby |
| CN115691299A (en) * | 2022-11-11 | 2023-02-03 | 深圳市深大极光科技有限公司 | Holographic anti-counterfeit label with incoherent light for reproducing multiple depth images and manufacturing method thereof |
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