CN107300734A - Optical anti-counterfeiting film apparatus - Google Patents
Optical anti-counterfeiting film apparatus Download PDFInfo
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- CN107300734A CN107300734A CN201710431594.5A CN201710431594A CN107300734A CN 107300734 A CN107300734 A CN 107300734A CN 201710431594 A CN201710431594 A CN 201710431594A CN 107300734 A CN107300734 A CN 107300734A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polarising Elements (AREA)
Abstract
The present invention relates to a kind of optical anti-counterfeiting film apparatus.The film apparatus at least includes one layer of optical anisotropy transmission layer, at least one layer of circularly polarized light selective transmission layer, wherein, the optical anisotropy transmission layer, which at least includes two, has different optically anisotropic first areas and second area, the first area and second area, it is arranged to different optical axis directions and/or different phase delay, so that under some angle, homogeneous linearly polarized light forms the circularly polarized light of nearly orthogonal after respectively through the first area and second area.The optical anti-counterfeiting film apparatus of the present invention is used for the false proof of valuables.The optical anti-counterfeiting film apparatus of the present invention includes the hide information of customizable bore hole None- identified, and can be by the device of polarised light can be generated, such as mobile phone, computer kinds of displays part screen light, polaroid, polarisation sunglasses etc., the described hide information of identification.
Description
Technical field
The present invention relates to a kind of optical anti-counterfeiting film apparatus.The film apparatus is hidden comprising customizable bore hole None- identified
Shape information, and can by that can generate the device of polarised light, such as mobile phone, computer kinds of displays part screen light, polaroid,
Polarisation sunglasses etc., the described hide information of identification.
Background technology
Due to color copy machine and the continuous popularization of imaging system and continuing to develop for various printing technologies, forgery is occurred in that
The growing number of phenomenon of valuables.For the purpose for preventing from palming off and forging, valuables such as license, marketable securities and name
Board product etc. is often configured with Security element, so that the authenticity to the valuables is tested, while preventing without permission
Duplication.
The anti-counterfeiting technology forged is resisted, according to whether the auxiliary of identification facility is needed, is divided into that a line is false proof and two wires
False proof two class.One line is false proof, and refer to need not be by any instrument, the anti-counterfeiting technology that directly can be judged by bore hole.Two wires
It is false proof to refer to the anti-counterfeiting technology for needing to recognize by simple tool.
In one line anti-counterfeiting technology, it is one of more effective means that light, which becomes technology,.What optically variable anti-counterfeiting element had becomes with angle
Color characteristic is easy to popular identification, helps to prevent the propagation of counterfeit from the field of circulation.However, as light becomes the continuous hair of technology
Exhibition and the marketization, make light dependent element increasingly be threatened by counterfeit, gradually weaken it as false proof effect.It is such as complete
The marketization that breath light becomes technology has obtained swift and violent development in recent years, and holographic optical becomes product and is readily apparent；With with angle
The manufacturing technology of the optically variable pigments of color changeable effect is gradually popularized, and false proof effect of the light change technology changed colour with angle is challenged.
Two wires anti-counterfeiting technology, needs certain aid to be identified such as fluorescence falsification preventing, infrared anti-false.This kind of skill
Art good concealment, some high-caliber technologies can obtain good antifalse effect, but two wires anti-counterfeiting technology has one all the time
Problem, is exactly that identification facility can not be popularized well, have impact on the convenience of truth identification.
With the progress of science and technology, display device, the particularly portable display apparatus using smart mobile phone as representative are obtained
The large-scale popularization of explosion type.Smart mobile phone provides new potentiality for anti-counterfeit recognition, if it is possible to using smart mobile phone as
Anti-counterfeit recognition instrument, will be substantially improved value and the effect of two wires anti-counterfeiting technology.
The content of the invention
In order to solve the above problems, the present invention is proposed a kind of can carry out the false proof of simple efficient identification by smart mobile phone
Technology.Specifically, the present invention relates to a kind of optical anti-counterfeiting film apparatus, the device comprising naked eyes can not Direct Recognition hide
Information, the information can by that can generate the device of polarised light, such as mobile phone, computer kinds of displays part screen light, polaroid,
Polarisation sunglasses etc., the described hide information of identification, the polarised light particularly preferably sent by smart mobile phone screen is observed.
Technical problem solved by the invention is to provide a kind of optical anti-counterfeiting film apparatus, wherein the hiding information meat included
Eye can not Direct Recognition, the hiding information that the present apparatus is included can be observed in the polarised light sent by smart mobile phone screen.
Technical problem solved by the invention also resides in offer and a kind of is provided with the valuable of above-mentioned optical anti-counterfeiting film apparatus
Article, by combining above-mentioned optical anti-counterfeiting film apparatus, the present apparatus can be observed in the polarised light sent by smart mobile phone screen
Comprising hiding information, so as to reach false proof purpose.
To realize the purpose of the present invention, technical scheme is as follows：
The invention provides a kind of optical anti-counterfeiting film apparatus, the optical anti-counterfeiting film apparatus at least includes：
(1) one layer of polarised light selective transmission layer, and
(2) one layers of optical anisotropy transmission layer,
Wherein, the optical anisotropy transmission layer, which at least includes two, has different optically anisotropic first areas
And second area, the optical anisotropy transmission layer is positioned at polarised light selective transmission layer upper surface.
In the preferred embodiment of the present invention, what the optical anisotropy transmission layer included have different optics each to
The first area and second area of the opposite sex are arranged to the arrangement of pixelation and constitute the information being macroscopically of practical significance, wherein
Described information can be identified by the device that can generate polarised light, such as mobile phone, computer kinds of displays part screen, polarisation
Piece, polarisation sunglasses etc., preferably smart mobile phone screen.
In the preferred embodiment of the present invention, the first area of the optical anisotropy transmission layer and second area tool
There are different optical axis directions and/or different phase delay.
In the more preferred embodiment of the present invention, the optical anisotropy transmission layer first area and second area
Optical axis direction angle is 70 °~110 °, and is that odd number or the optical anisotropy are saturating with identical phase delay n λ/4, n
The optical axis direction angle for penetrating layer first area and second area is -20 °~20 °, and phase delay difference n λ/2, n are odd number.
In the preferred embodiment of the present invention, the polarised light selective transmission layer is linearly polarized light selective transmission layer
Or circularly polarized light selective transmission layer,
Preferably, linearly polarized light selective transmission layer is Zero-order diffractive grating or the linear polarization polarizer,
Preferably, the circularly polarized light selective transmission layer is cholesteric crystal layer.
In the more preferred embodiment of the present invention, the cholesteric crystal layer is by left-handed cholesteric liquid crystal and dextrorotation cholesteric liquid
Two regions composition that crystalline substance is respectively constituted.
In the preferred embodiment of the present invention, the optical anisotropy transmission layer is nematic liquid crystal layer.
In the preferred embodiment of the present invention, the optical anti-counterfeiting film apparatus at least also include another layer of optics it is each to
Different in nature transmission layer, the optical anisotropy transmission layer is located at polarised light selective transmission layer both sides, and with different
Optical anisotropy.
In the preferred embodiment of the present invention, the optical anti-counterfeiting film apparatus at least also includes another layer of polarised light choosing
Selecting property transmission layer.
In the more preferred embodiment of the present invention, two layers of polarised light selective transmission layer is cholesteric crystal layer.
In the more preferred embodiment of the present invention, two layers of cholesteric crystal layer has opposite rotation direction or two layers of cholesteric phase
Liquid crystal layer has different reflection peak wavelength.
In the preferred embodiment of the present invention, the polarised light selective transmission layer lower surface also expands comprising one layer of wavelength
Fill layer.
In the more preferred embodiment of the present invention, the wavelength extension layer includes the component of following number, by weight,
18 parts of chiral agent, 2 parts of light trigger, 30 parts of acrylic resin, wherein the molecular structural formula of the chiral agent is as follows：
The optical anti-counterfeiting film apparatus of the present invention at least includes one layer of optical anisotropy transmission layer, at least one layer of circular polarization
Light selective transmission layer, wherein, the optical anisotropy transmission layer, which at least includes two, has difference optically anisotropic
First area and second area, the first area and second area are arranged to different optical axis direction and/or difference
Phase delay so that under some angle, homogeneous linearly polarized light is after respectively through the first area and second area, shape
Into the circularly polarized light of nearly orthogonal.
Optical axis direction and phase delay are to constitute optically anisotropic two key elements.It is well known that by controlling optics
The optical axis direction and phase delay of anisotropic band, can fully regulate and control the polarization of the polarised light by optical anisotropic layer
State, that is, produce a kind of space regulating and controlling effect of light.The parameter of regulation and control includes the polarization direction of transmitted light, polarization form etc..
However, in the prior art, on single base material, single optical anisotropic layer can only be realized.It is so-called single, i.e.,
The optical axis direction of optical anisotropic layer regional is unified, and phase delay is also unified.In the present invention, inventor
Devise with different optically anisotropic multizone implementations, optics is created on single base material respectively to different so as to realize
Property information.
Specifically, information includes but is not limited to the contents such as pattern, word, symbol, numeral.
Because unaided human eye can only perceive intensity, the difference of color of light, and the difference between the polarization state of light can not be perceived
Not, thus natural light by it is of the present invention have different optical anisotropy regions when, can not be perceived, that is, believe by bore hole
Breath is hidden.
However, when incident light is polarised light, polarised light passes through with different optically anisotropic first areas and the
Behind two regions, it is changed into orthogonal circularly polarized light.One of which is circularly polarized light-transmitting layer transmission, another to be circularly polarized transmission
Layer reflection, the difference of the polarization state of light is changed into the difference of the intensity of light, so that observed person observes.
The orthogonal circularly polarized light, refers to the circularly polarized light with different rotation directions, i.e., left-handed and right-circularly polarized light.Institute
Nearly orthogonal is stated, the circularly polarized light for referring to two different rotation directions can be elliptically polarized light.
Specifically, for the film apparatus of the present invention, there is difference included by the optical anisotropy transmission layer
Optically anisotropic first area and second area, it is 70 °~110 ° to be arranged to optical axis direction angle, and identical phase
Position delay n λ/4, n are odd number so that under some angle, homogeneous linearly polarized light is respectively through the first area and second
Behind region, the circularly polarized light of nearly orthogonal is formed.
Similar, another set-up mode is：For the film apparatus of the present invention, the optical anisotropy transmission layer institute
Including there is different optically anisotropic first areas and second area, be arranged to optical axis direction angle be -20 °~
20 °, and phase delay difference n λ/2, n are odd number.So that under some angle, homogeneous linearly polarized light is respectively through described
Behind first area and second area, the circularly polarized light of nearly orthogonal is formed.
As described above, circularly polarized light transmission layer, it, which is acted on, passes through a kind of circularly polarized light of rotation direction, by another rotation direction
Circularly polarized light reflection.Circularly polarized light transmission layer and optical anisotropic layer are organic wholes, can under their collective effect
The difference of the polarization state of light is converted to the intensity difference of light, so as to be perceived by the human eye.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, and what the optical anisotropy transmission layer included has
The patterning information of bore hole None- identified is shown as on different optical anisotropy regional macros, by the way that polarised light can be generated
Device, such as mobile phone, computer kinds of displays part screen light, polaroid, polarisation sunglasses etc., the described stealthy letter of identification
Breath.In view of the generality and familiarity of device, the preferably described device for sending polarised light of the present invention is portable smart mobile phone.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, wherein circularly polarized light selective transmission layer is courage
Steroid phase liquid crystal layer.The cholesteric crystal layer reflects specific wavelength and the circularly polarized light of specific rotation direction.The cholesteric crystal layer is selected
The wave-length coverage of sexual reflex light is from ultraviolet, visible near-infrared.Cholesteric liquid crystal both can be left-handed cholesteric liquid crystal or
Dextrorotation cholesteric liquid crystal.Cholesteric liquid crystal layer can also be two regions respectively constituted by left-handed cholesteric liquid crystal and dextrorotation cholesteric liquid crystal
Composition, the two regions also may make up the information of patterning.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, wherein any optical anisotropy transmission layer is
Nematic liquid crystal layer.Nematic liquid crystal layer at least has the Two Areas of the different optics opposite sex, and the optical anisotropy refers to not
There is different optical axis directions or different phase delay with region, and pattern is constituted with different optically anisotropic regions
The information of change.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, at least also includes another layer of optical anisotropy transmission
Layer.Two layers of optical anisotropic layer is located at polarised light selective transmission layer both sides, and with different optics it is each to
The opposite sex.One layer of the wherein at least optical anisotropy transmission layer is included with different optically anisotropic first areas and the
Two regions, or including the different optically anisotropic regions of more than two, different optical anisotropy regions are each other
Constitute the information of patterning.Another layer of optical anisotropy transmission layer can include the different optical anisotropies of two or more
Region, or only include an optically anisotropic region, such as the optical anisotropy transmission layer exists only in film
The regional area of device, but the region constitutes the information of patterning in itself.When the optical anti-counterfeiting film apparatus of the present invention is included
Two layers of optical anisotropy transmission layer at least include have different optically anisotropic first areas and second area when,
The different optical anisotropy regions of every layer of optical anisotropic layer constitute different patterning information.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, at least also includes another layer of polarised light selective transmission
Layer.It is preferred that two layers of polarised light selective transmission layer is cholesteric crystal layer, two layers of cholesteric crystal layer has opposite rotation direction,
Or two layers of cholesteric crystal layer has different reflection peak wavelength.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, and the polarised light selective transmission layer lower surface is also wrapped
Containing one layer of wavelength extension layer, the wavelength extension layer is including but not limited to chiral agent, non-polar solven, resin and light-initiated
Agent.
When polarised light selective transmission layer is cholesteric crystal layer, only specific wavelength and the circularly polarized light of specific rotation direction
The layer can be passed through.The centre wavelength position of specific wavelength and wavelength width scope be by cholesteric liquid crystal molecule birefringence and
What pitch P was determined, P is bigger, and centre wavelength is shorter, and wave-length coverage is wider.And pitch P then can be by adjusting in cholesteric liquid crystal
The content of chiral agent is adjusted.Typically, the transmitted light wave-length coverage of cholesteric liquid crystal is in below 80nm, such as 600-
660nm red light, 520-580nm green light etc..For whole visible light wave range 400-700nm, cholesteric phase liquid
Brilliant transmission peak wavelength scope is excessively narrow, and especially for the present invention, cholesteric crystal layer can only be by narrower wave-length coverage
Light is changed into strength difference by polarization state difference, so as to macroscopically reduce the contrast of hide information.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, and the wavelength extension layer can effectively expand cholesteric
The transmitted light wave-length coverage of phase liquid crystal layer, specifically, 240nm can be extended to from 80nm, after expansion, can make wider wavelength
In the range of polarised light can be transformed into strength difference from polarization state difference so that the information recognized can become apparent from, more clearly
It is clear.
The principle that the wavelength extension layer can expand cholesteric crystal layer is：Chiral material in extension layer is migrated to courage
In steroid phase liquid crystal layer, and the ratio of the chiral material of migration is reduced with the increase in path, so that cholesteric crystal layer
Pitch P forms gradient in a thickness direction, is equivalent to the stacking of the cholesteric crystal layer of the different centre wavelengths of multilayer, so that
Expand its transmitted light wave-length coverage.
, it is necessary to adjust the curing process of cholesteric crystal layer when using wavelength extension layer, solidify under a step nitrogen, adjust
It is whole be two-stage cure, i.e., first precuring in atmosphere, apply wavelength extension layer after, then carry out under nitrogen solidify (be specifically shown in reality
Apply example).It is intended that the cholesteric crystal layer of air curing, is influenceed by oxygen inhibition, solidification is insufficient, is conducive to ripple
Chiral material fast transferring in long extension layer enters, and carries out secondary abundant solidification again after completing migration, makes optical anti-counterfeiting film
Device can adapt to various application environments.
The optical anti-counterfeiting film apparatus of the present invention, which is removed, includes polarised light selective transmission layer, and optical anisotropy transmission
Layer is outer, may also include the plastic basis material of carrying optical coating, such as the transparent base such as PP, PC, PE, PET, TAC, PA.
Polarised light is widely present in current life, including but not limited to smooth surface reflection light contain polarization into
Part, contain the composition of polarization through the light of window-glass, and natural light is passed through after the linear polarization polarizer or the circular polarization polarizer
The polarised light of formation.People's daily life essential portable computer and smart mobile phone, its screen hair are particularly turned into
The light gone out contains polarization composition.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, and the element at least has one layer of cholesteric liquid crystal layer, extremely
Few two layers of nematic liquid crystal layer, two layers of nematic liquid crystal layer is located at the both sides of cholesteric liquid crystal layer, at least one layer of nematic phase liquid respectively
Crystal layer at least includes having different optically anisotropic first areas and second area, it is characterised in that by smart mobile phone screen
The patterning hiding information that the device is included can be observed in the polarised light that curtain is sent, and rotates the device or mobile phone, the face is wrapped
The information contained is exchanged between negative and positive effect.Mobile phone is placed on the Optical devices another side, device another side can be observed and is included
Different pattern hiding information, rotate the device or mobile phone, the information that the face is included is same to exchange between negative and positive effect.
The optical anti-counterfeiting film apparatus of the present invention is in the form of transparency window, Goods hanging label, labeling, bracing wire, safety line with having
Valency article is combined together, for the false proof of valuables.
Brief description of the drawings
Fig. 1：A kind of optical anti-counterfeiting film apparatus includes one layer of optical anisotropy transmission layer and one layer of polarised light selectivity
Transmission layer, optical anisotropy transmission layer is mutually 86 ° of optical anisotropy region comprising two optical axis directions；
Fig. 2：A kind of optical anti-counterfeiting film apparatus is each comprising two layers of optics for being distributed in polarised light selective transmission layer both sides
Anisotropy transmission layer, wherein one layer of optical anisotropy region with two out of phase delays, another layer has two not
With the optical anisotropy region of optical axis direction, every layer constitutes the information patterned；
Fig. 3：A kind of optical anti-counterfeiting film apparatus includes the optics for being distributed in polarised light selective transmission layer both sides respectively to different
Property transmission layer, wherein one layer of optical anisotropy transmission layer has two regions of different optical axis directions, another layer of optics it is each to
Different in nature transmission layer, which has, exists only in the local optical anisotropy region of film apparatus；
Fig. 4：Different hiding informations can be observed by polarised light for a kind of different faces of optical anti-counterfeiting film apparatus.Rotate
The hiding information of the device, wherein one side is exchanged between negative and positive effect；
Fig. 5：Different hiding informations can be observed by polarised light for a kind of different faces of optical anti-counterfeiting film apparatus.Rotate
The device, the hiding information on two sides is exchanged between negative and positive effect；
Fig. 6：A kind of optical anti-counterfeiting film apparatus includes two layers of adjacent polarised light selective transmission layer, and is distributed in two
Two layers of optical anisotropy transmission layer above and below layer polarised light selective transmission layer, two layers of optical anisotropy transmission layer has respectively
There are two optical anisotropy regions that optical axis direction is mutually 85 ° and 95 °；
Fig. 7：A kind of optical anti-counterfeiting film apparatus includes one layer of optical anisotropy transmission layer and one layer of polarised light selectivity
Transmission layer, wherein polarised light selective transmission layer form for the different cholesteric liquid crystal layer chromatography of rotation direction.
Fig. 8：A kind of optical anti-counterfeiting film apparatus is selectively saturating comprising one layer of optical anisotropy transmission layer, one layer of polarised light
Penetrate layer and one layer of wavelength extension layer, the optical anisotropy transmission layer comprising the optics that two optical axis directions are mutually 86 ° it is each to
Specific region；
Embodiment
The required material of the present invention and method are realized in lower mask body introduction.
For make the optical anti-counterfeiting film apparatus in following embodiments Nematic phase liquid crystal material molecular structural formula such as
Shown in lower, wherein liquid crystal molecule 1 accounts for 75 parts (by weight), and liquid crystal molecule 2 accounts for 10 parts (by weight) and liquid crystal molecule 3 accounts for 15
Part (by weight) composition mixing Nematic phase liquid crystal material.
The molecular structural formula of photosensitive oriented material for making the optical anti-counterfeiting film apparatus in following embodiments is as follows
It is shown.
Material for making the optical anisotropy transmission layer in following embodiments is above-mentioned mixing nematic liquid crystal material
The mixture of material and photosensitive oriented material, wherein mixing Nematic phase liquid crystal material is accounted for 70-75 parts (by weight), photosensitive orientation material
Material is accounted for 23-28 parts (by weight), includes 2 parts of light trigger (IRGACURE369) (by weight).By said mixture
Cyclohexanone is dissolved in, the solution that solid content is 30% (weight ratio) is made.
It by above-mentioned solid content is 30% (weight that the technique for making the optical anisotropy transmission layer in following embodiments, which is,
Than) solution be spun on PP films, dry, the linear polarization for being in air atmosphere then 280-340nm with wavelength is ultraviolet
Light writes different directions information, then in a nitrogen atmosphere with ultraviolet mercury lamp by curing of coatings, formed have different optics each to
Different in nature first area and the optical anisotropy transmission layer of second area.
The liquid crystal material of cholesteric liquid crystal layer for making the optical anti-counterfeiting film apparatus in following embodiments is above-mentioned mixed
Close the mixture of Nematic phase liquid crystal material and chiral agent.Wherein mixing Nematic phase liquid crystal material accounts for 89-94 parts (by weight), hand
Property agent accounts for 4-9 parts (by weight), and light trigger accounts for 2 parts (by weight), and said mixture is dissolved in into cyclohexanone, is made and contains admittedly
Measure as the cholesteric liquid crystal solution of 30% (weight ratio).Wherein
The molecular structural formula of chiral agent is as follows：
It by above-mentioned solid content is 30% (weight that the technique for making the layer of the polarised light selective transmission in following embodiments, which is,
Than) cholesteric liquid crystal solution be spun on optical anisotropy transmission layer, dry, ultraviolet mercury lamp is then used in a nitrogen atmosphere
By curing of coatings.
It is to include above-mentioned hand for making the wavelength of the optical anti-counterfeiting film apparatus in following embodiments to expand layer material
The mixture of property agent, wherein chiral agent accounts for 18 parts (by weight), and light trigger accounts for 2 parts (by weight), and acrylic resin is accounted for
(DSM chemistry, UracronCY472,30 parts (by weight)), chloroform accounts for 50 parts (by weight), is configured to solid content and is
The wavelength extension layer solution of 50% (weight ratio).
The technique for making the wavelength extension layer in following embodiments is
1) by the cholesteric liquid crystal solution that above-mentioned solid content is 30%, it is spun on optical anisotropy transmission layer, dries,
Then in air atmosphere with ultraviolet mercury lamp by curing of coatings, cholesteric crystal layer is obtained；
2) by the wavelength extension layer solution that above-mentioned solid content is 50%, it is spun in above-mentioned cholesteric crystal layer, dries, so
Afterwards in a nitrogen atmosphere with ultraviolet mercury lamp by curing of coatings, wavelength extension layer is obtained.
Embodiment 1
On PP surfaces, making is of the present invention has different optical anisotropy first areas (a) and second area (b)
Optical anisotropy transmission layer (nematic liquid crystal layer) (1) and polarised light selective transmission layer (cholesteric liquid crystal layer) (2), and light
Learn anisotropy transmission layer (nematic liquid crystal layer) (1) and be located at polarised light selective transmission layer (cholesteric liquid crystal layer) (2) above, knot
Structure is as shown in figure 1, form the optical anti-counterfeiting film apparatus of the present invention.Wherein optical anisotropy transmission layer (1) has two light
Direction of principal axis is in 90 °, and phase delay is the optical anisotropy region of λ/4, and the reflection peak wavelength of cholesteric liquid crystal layer (2) is
550nm, in polarised light selective transmission layer (2) surface applying hot melt adhesives adhesion coating, heating is bonded in wine-type packing box surface,
Point opens smart mobile phone screen, and the hiding information that (direction of observation (c) the is as shown by arrows) film apparatus is included can be observed, turn
Start machine, hiding information can be observed and is exchanged between negative and positive effect, the different optical axis directions of optical anisotropy transmission layer two
Region is 32% to the transmission rate variance of 550nm polarised light.
Embodiment 2
A kind of optical anti-counterfeiting film apparatus, with structure as shown in Figure 3, wherein optical anisotropy transmission layer (is
Nematic liquid crystal layer) polarised light selective transmission layer (3) both sides are distributed in, and optical anisotropy transmission layer (1) is located at polarization
Above, optical anisotropy transmission layer (1) is in 90 ° with two optical axis directions, and phase delay is for light selective transmission layer (3)
The optical anisotropy region (i.e. first area (a) and second area (b)) of λ/4, optical anisotropy transmission layer (2) has one
Individual optical anisotropy region, the region exists only in the part of film apparatus.Polarised light selective transmission layer rises for linear polarization
Inclined device, the optical anisotropy transmission layer being distributed in its both sides respectively constitutes different patterning information, the information content such as Fig. 4 institutes
Show.The false-proof film device is in the form of Trade mark hanging plate applied to the false proof of valuables.The optical anti-counterfeiting film is placed in partially
Shake on light source such as smart mobile phone screen, it is observed that (direction of observation (c) is as shown by arrows) " SECURITY ", rotates hand
Machine, word " SECURITY " mutually changes (4A) between characters cut in intaglio and characters cut in relief, by the film apparatus turn-over, cylindrical pattern (4B) occurs.
Embodiment 3
The optical anti-counterfeiting film apparatus of the present invention, wherein being located at polarised light selective transmission layer (cholesteric liquid crystal layer) respectively
(3) two layers optical anisotropy transmission layer of the both sides with two different optical anisotropy regions, wherein cholesteric liquid crystal layer
Reflection peak wavelength is 600nm.Its structure is as shown in Figure 2.Wherein one layer optical anisotropic layer (2) has two optical axis direction folders
Angle is 0 °, the optical anisotropy region (being respectively λ/4 and 3 λ/4) of phase delay difference λ/2, another layer of optical anisotropy
Layer (1) has identical phase delay λ/4, but the optical axis direction angle of its first area (a) for including and second area (b) is
96°.This optical anti-counterfeiting film apparatus is applied to the false proof of valuables.It can be observed that (direction of observation (c) is such as by polarised light
Shown in arrow) the patterning hiding information that is included of device one side, such as word " SECURITY " rotates the device, the face
Comprising text information exchanged between negative and positive effect, as shown in Figure 5A.By the device turn-over, device another side institute can be observed
Comprising different pattern hiding information, rotate the device, the information that the face is included is same to exchange between negative and positive effect, such as
Shown in Fig. 5 B.
Embodiment 4
Optical anti-counterfeiting film apparatus of the present invention have different optical anisotropy regions optical anisotropy transmission layer and
Polarised light selective transmission layer, wherein polarised light selective transmission layer is located between optical anisotropy transmission layer, and its structure is such as
Shown in Fig. 6.Optical anisotropy transmission layer (1) and optical anisotropy transmission layer (2) be nematic liquid crystal layer, optics respectively to
Two regions (i.e. first area (a) and second area (b)) liquid crystal molecule optical axis included angle that different in nature transmission layer (1) includes is 85 °,
Phase delay is λ/4, two regions that optical anisotropy transmission layer (2) is included (i.e. first area (c) and second area
(d)) liquid crystal molecule optical axis included angle is 95 °, and phase delay is 3 λ/4.Two polarised light selective transmissions layers (3) and (4) are
Cholesteric liquid crystal layer, yellow and green light are reflected in normal viewing angles respectively, by the optical anti-counterfeiting film apparatus with transparency window
Mode is used for the false proof of valuables.Smart mobile phone screen is opened it is observed that (direction of observation (e) such as arrow by linear polarizer or point
Shown in head) the transparency window different faces include different hiding informations, rotate mobile phone, hiding information exchanges between negative and positive effect.
Embodiment 5
Optical anti-counterfeiting film apparatus of the present invention has the optical anisotropy transmission layer (3) and polarised light selective transmission
Layer (4), wherein optical anisotropy transmission layer (3) are located at polarised light selective transmission layer (4) above.Optical anisotropy is transmitted
Layer (3) is that, with the nematic liquid crystal layer that identical optical axis direction but optical delay are λ/4, polarised light selective transmission layer (4) is
Left-handed cholesteric liquid crystal layer (a) and dextrorotation cholesteric liquid crystal layer (b) chromatography are formed, and the reflection peak wavelength of wherein cholesteric liquid crystal layer is
550nm, its structure is as shown in Figure 7.This film apparatus is used for the false proof of high-grade goods in the way of labelling.Pass through linear polarizer
Or point opens smart mobile phone screen it is observed that the hiding information that (direction of observation (c) the is as shown by arrows) labeling is included, rotation
Labeling, the information included in it is exchanged between light and shade.
Embodiment 6
Make of the present invention with different optical anisotropy first areas (a) and second area (b) on PP surfaces
Optical anisotropy transmission layer (1), polarised light selective transmission layer (2) and wavelength extension layer (3), polarised light selective transmission layer
(2) it is cholesteric crystal layer, optical anisotropy transmission layer (1) is nematic liquid crystal layer.The position relationship of each layer is from top to bottom
Structure is as shown in figure 8, form the optical anti-counterfeiting film apparatus of the present invention.Wherein optical anisotropy transmission layer (1) has two
Optical axis direction is into 88 °, and phase delay is the reflection of cholesteric crystal layer under the optical anisotropy region of λ/4, vertical angle
Peak initial center wavelength is 610nm, after wavelength extension layer is applied, and the reflection peak centre wavelength of cholesteric crystal layer is 550nm,
Wave-length coverage 450-650nm, in wavelength extension layer (3) face pressure-sensitive adhesive coating adhesion coating, it is pasted in adhesive label form
Commodity outer package surface.Point opens smart mobile phone screen, and the hiding letter in (direction of observation (c) is as shown by arrows) label can be observed
Cease " SECUIRITY ", rotate mobile phone, hiding information can be observed and is exchanged between negative and positive effect, as shown in Figure 4 A.Can under transmitted light
It was observed that hollow out word.Polarised light of the region of the different optical axis directions of optical anisotropy transmission layer (1) two to 450-650nm
Average transmittance difference be 25%.
Claims (13)
1. optical anti-counterfeiting film apparatus, the optical anti-counterfeiting film apparatus at least includes：
(1) one layer of polarised light selective transmission layer, and
(2) one layers of optical anisotropy transmission layer,
Wherein, the optical anisotropy transmission layer, which at least includes two, has different optically anisotropic first areas and the
Two regions,
The optical anisotropy transmission layer is located at polarised light selective transmission layer upper surface.
2. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the optical anisotropy transmission layer includes
There is different optically anisotropic first areas and second area to be arranged to the arrangement of pixelation and constitute macroscopically have
The information of practical significance, wherein described information can be identified by the device that can generate polarised light, and such as mobile phone, computer are each
Class display part screen, polaroid, polarisation sunglasses etc., preferably smart mobile phone screen.
3. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the of the optical anisotropy transmission layer
One region and second area have different optical axis directions and/or different phase delay.
4. the optical anti-counterfeiting film apparatus as described in claim 1-3, it is characterised in that the optical anisotropy transmission layer
The optical axis direction angle of one region and second area is 70 °~110 °, and with identical phase delay n λ/4, n be odd number or
The optical axis direction angle of the optical anisotropy transmission layer first area and second area is -20 °~20 °, and phase delay
It is odd number to differ n λ/2, n.
5. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the polarised light selective transmission layer is line
Polarised light selective transmission layer or circularly polarized light selective transmission layer,
Preferably, linearly polarized light selective transmission layer is Zero-order diffractive grating or the linear polarization polarizer,
Preferably, the circularly polarized light selective transmission layer is cholesteric crystal layer.
6. optical anti-counterfeiting film apparatus as claimed in claim 5, it is characterised in that the cholesteric crystal layer is by left-handed cholesteric
Two regions composition that liquid crystal and dextrorotation cholesteric liquid crystal are respectively constituted.
7. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the optical anisotropy transmission layer be to
Row phase liquid crystal layer.
8. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the optical anti-counterfeiting film apparatus is at least also
Including another layer of optical anisotropy transmission layer, the optical anisotropy transmission layer is located at polarised light selective transmission layer
Both sides, and with different optical anisotropies.
9. optical anti-counterfeiting film apparatus as claimed in claim 1, it is characterised in that the optical anti-counterfeiting film apparatus is at least also
Including another layer of polarised light selective transmission layer.
10. optical anti-counterfeiting film apparatus as claimed in claim 9, it is characterised in that two layers of polarised light selective transmission layer is
For cholesteric crystal layer.
11. optical anti-counterfeiting film apparatus as claimed in claim 9, it is characterised in that two layers of cholesteric crystal layer has opposite
Rotation direction or two layers of cholesteric crystal layer there are different reflection peak wavelength.
12. film apparatus as claimed in claim 1, it is characterised in that the polarised light selective transmission layer lower surface is also wrapped
Containing one layer of wavelength extension layer.
13. film apparatus as claimed in claim 12, it is characterised in that the wavelength extension layer includes the group of following number
Part, by weight,
18 parts of chiral agent, 2 parts of light trigger, 30 parts of acrylic resin,
The molecular structural formula of wherein described chiral agent is as follows：
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710431594.5A CN107300734A (en) | 2017-06-09 | 2017-06-09 | Optical anti-counterfeiting film apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710431594.5A CN107300734A (en) | 2017-06-09 | 2017-06-09 | Optical anti-counterfeiting film apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110136565A (en) * | 2019-06-26 | 2019-08-16 | 山东泰宝防伪技术产品有限公司 | On-Screen Identification liquid crystal anti-counterfeiting mark and preparation method thereof |
| CN112285819A (en) * | 2020-11-03 | 2021-01-29 | 上海先幻新材料科技有限公司 | Polarizing film with different optical retardation areas, optical system and application |
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| US20030035191A1 (en) * | 2000-01-27 | 2003-02-20 | Franco Moia | Optical security device |
| CN1550799A (en) * | 1997-05-09 | 2004-12-01 | Optical element and anti-fake or anti-copy element including same | |
| CN101263012A (en) * | 2005-07-19 | 2008-09-10 | 德国捷德有限公司 | Value document, production and verification of value documents |
| CN101905588A (en) * | 2009-06-03 | 2010-12-08 | 中国人民银行印制科学技术研究所 | Light variation anti-forgery element with multiple anti-forgery functions |
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| CN1550799A (en) * | 1997-05-09 | 2004-12-01 | Optical element and anti-fake or anti-copy element including same | |
| US20030035191A1 (en) * | 2000-01-27 | 2003-02-20 | Franco Moia | Optical security device |
| CN101263012A (en) * | 2005-07-19 | 2008-09-10 | 德国捷德有限公司 | Value document, production and verification of value documents |
| CN101905588A (en) * | 2009-06-03 | 2010-12-08 | 中国人民银行印制科学技术研究所 | Light variation anti-forgery element with multiple anti-forgery functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110136565A (en) * | 2019-06-26 | 2019-08-16 | 山东泰宝防伪技术产品有限公司 | On-Screen Identification liquid crystal anti-counterfeiting mark and preparation method thereof |
| CN112285819A (en) * | 2020-11-03 | 2021-01-29 | 上海先幻新材料科技有限公司 | Polarizing film with different optical retardation areas, optical system and application |
| CN112285819B (en) * | 2020-11-03 | 2023-05-16 | 上海先让新材料合伙企业(有限合伙) | Polarizing film with different optical retardation regions, optical system and application |
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