CN107132607A - Optical anti-counterfeiting film apparatus - Google Patents
Optical anti-counterfeiting film apparatus Download PDFInfo
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- CN107132607A CN107132607A CN201710431119.8A CN201710431119A CN107132607A CN 107132607 A CN107132607 A CN 107132607A CN 201710431119 A CN201710431119 A CN 201710431119A CN 107132607 A CN107132607 A CN 107132607A
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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
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- 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
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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
- 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
- G02B5/3083—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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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
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- 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, at least one layer of dark 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
Technical problem solved by the invention is to provide a kind of optical anti-counterfeiting film apparatus, and the device is possessing light change feature
While, comprising naked eyes can not Direct Recognition hiding information, polarised light that the information can be sent by smart mobile phone screen sees
Observe.
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.
In order to solve the above problems, the present invention proposes one kind and has light change feature concurrently and can be carried out by smart mobile phone simple
Efficient identification, the anti-counterfeiting technology that a line is combined with two wires.Specifically, the present invention relates to a kind of optical anti-counterfeiting film dress
Put.The device possess light become feature while, comprising naked eyes can not Direct Recognition hiding information, the information can be by intelligence
The polarised light that mobile phone screen is sent is observed.
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 optical anisotropy transmission layer,
2) one layer of polarised light selective transmission layer, and
3) a layer depth chromatograph,
Wherein, the optical anisotropy transmission layer, which at least includes two, has different optically anisotropic first areas
And second area,
Wherein described optical anisotropy transmission layer and the dark layer are distributed in the polarised light selective transmission layer two
Side, and the optical anisotropy transmission layer is located at polarised light selective transmission layer above.
In the preferred embodiment of the present invention, wherein, the dark layer opposite side of the optical anti-counterfeiting film apparatus is also right
The polarised light selective transmission layer and the optical anisotropy transmission layer is distributed with claiming.
In the preferred embodiment of the present invention, wherein, the first area and second area are arranged to have difference
Optical axis direction and/or different phase delay.
In the more preferred embodiment of the present invention, wherein, the first area and second area are arranged to optical axis side
It is 70 °~110 ° to angle and is odd number or is arranged to optical axis direction angle to be -20 ° with identical phase delay n λ/4, n
~20 ° and phase delay difference n λ/2, n be odd number.
In the preferred embodiment of the present invention, wherein, the optical anisotropy transmission layer include have do not share the same light
Learn anisotropic first area and second area is arranged to the arrangement of pixelation and constitutes the letter being macroscopically of practical significance
Breath.Wherein, described information can be identified by the device that can generate polarised light, such as the kinds of displays such as mobile phone, computer
Screen, polaroid, polarisation sunglasses of part etc., preferably smart mobile phone screen.
In the preferred embodiment of the present invention, wherein, the optical anisotropy transmission layer be nematic liquid crystal layer.
In the preferred embodiment of the present invention, wherein, polarised light selective transmission layer is circularly polarized light selectivity
Transmission layer, it is preferable that the circularly polarized light selective transmission layer is cholesteric crystal layer.
In the more preferred embodiment of the present invention, wherein, the cholesteric crystal layer is left-handed cholesteric liquid crystal, dextrorotation courage
Steroid liquid crystal is made up of two regions that left-handed cholesteric liquid crystal and dextrorotation cholesteric liquid crystal are respectively constituted.
In the preferred embodiment of the present invention, wherein, the dark layer at least absorb through optical anisotropy transmission
The light of layer and circularly polarized light selective transmission layer 30%, preferably at least absorbs and passes through optical anisotropy transmission layer and circular polarization
The light of light selective transmission layer 40%.
In the preferred embodiment of the present invention, wherein, regional area of the dark layer present at least at film apparatus.
In the preferred embodiment of the present invention, wherein, between polarised light selective transmission layer and the dark layer
Also comprising one layer of wavelength extension layer.
In the preferred embodiment of the present invention, wherein, the wavelength extension layer includes the component of following number, by weight
Meter,
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：
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, at least one layer of dark layer, wherein, the optical anisotropy transmission layer is extremely
Including two less has different optically anisotropic first areas and second area, and the first area and second area are set
It is set to different optical axis directions and/or different phase delay so that homogeneous linearly polarized light is respectively under some angle
Behind the first area and second area, the circularly polarized light of nearly orthogonal is formed.
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 sufficiently 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 homogeneous linearly polarized light is respectively through the first area and the secondth area under some angle
Behind domain, 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.
When circularly polarized light selective transmission layer is cholesteric crystal layer, the polarised light is the polarised light of specific wavelength,
The specific wavelength is cholesteric crystal layer reflection peak wavelength.When viewing angle is from vertically to when tilting, cholesteric crystal layer is anti-
The color for penetrating light changes, and the wavelength of reflected light shows as the optically variable effect changed colour with angle from long wave to shortwave.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, wherein for circularly polarized light selective transmission layer,
There are specific wavelength and the circular polarization light-transmissive of the specific rotation direction layer.
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 crystal layer can also be the Liang Ge areas respectively constituted by left-handed cholesteric liquid crystal and dextrorotation cholesteric liquid crystal
Domain is constituted, and 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, wherein the dark layer at least absorbs and passes through polarised light
The light of selective transmission layer and optical anisotropy transmission layer 30%, preferably at least absorbs through polarised light selective transmission layer
With the light of optical anisotropy transmission layer 40%.The dark layer refers to the transmissivity of this layer less than polarised light selective transmission layer
With the transmission layer of optical anisotropy transmission layer, therefore its color than polarised light selective transmission layer and optical anisotropy transmit
Layer depth.The dark layer can be formed by silk-screen printing, flexo and intaglio printing.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, office of the dark layer present at least at film apparatus
Portion region.Such as dark layer is characters cut in relief pattern or characters cut in intaglio pattern.
The present invention is used for the optical anti-counterfeiting film apparatus of valuables, polarised light selective transmission layer and dark layer it
Between also comprising one layer of wavelength extension layer, extension layer is including but not limited to chiral agent, non-polar solven, resin and light trigger.
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 crystal layer,
At least one layer of nematic liquid crystal layer, at least one layer of dark layer.Nematic liquid crystal layer at least includes having different optical anisotropies
First area and second area, the patterning that the device is included can be observed in the polarised light sent by smart mobile phone screen
Hiding information, rotates the device or mobile phone, and the information that the face is included is exchanged between negative and positive effect.When viewing angle from vertically to
During inclination, there is the optically variable effect changed colour with angle in the film apparatus.In transmitted light, it can be observed to be present in film apparatus part
The pierced pattern of the dark layer in region.
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 is selectively saturating comprising one layer of optical anisotropy transmission layer, one layer of polarised light
Penetrate layer and dark layer that one layer is present in device regional area, optical anisotropy transmission layer is mutually comprising two optical axis directions
86 ° of optical anisotropy region；
Fig. 2：What the polarised light that a kind of optical anti-counterfeiting film apparatus is sent by smart mobile phone can be observed to be included hides
Information.The device is rotated, hiding information is exchanged between negative and positive effect；
Fig. 3：A kind of optical anti-counterfeiting film apparatus is comprising two layers of polarised light selective transmission layer and positioned at two layers of polarised light choosing
Dark layer between selecting property transmission layer, and it is distributed in two layers of optical anisotropy above and below two layers of polarised light selective transmission layer
Transmission layer, wherein one layer of optical anisotropy transmission layer has optical axis direction into 80 ° of two optical anisotropy regions, it is another
Layer optical anisotropy transmission layer has optical axis direction into 5 ° and phase delay difference λ/4；
Fig. 4：What the polarised light that film apparatus described in Fig. 3 is sent by smart mobile phone can be observed that different faces are included hides
Information.The device is rotated, the hiding information that different faces are included is exchanged between negative and positive effect；
Fig. 5：A kind of optical anti-counterfeiting film apparatus is selectively saturating comprising one layer of optical anisotropy transmission layer, one layer of polarised light
Layer and blue layer layer are penetrated, wherein polarised light selective transmission layer forms for the different cholesteric crystal layer chromatography of rotation direction.
Fig. 6：A kind of optical anti-counterfeiting film apparatus is selectively saturating comprising one layer of optical anisotropy transmission layer, one layer of polarised light
The dark layer that layer, one layer of wavelength extension layer and one layer are present in device regional area is penetrated, optical anisotropy transmission layer includes two
Individual optical axis direction is mutually 86 ° of optical anisotropy 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, 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 parts
(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 the light trigger (IRGACURE369) of 2 parts (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 crystal layer for making the optical anti-counterfeiting film apparatus in following embodiments is above-mentioned
The mixture of Nematic phase liquid crystal material and chiral agent is mixed, wherein mixing Nematic phase liquid crystal material accounts for 89-94 parts (by weight),
4-9 parts of chiral agent (by weight), 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).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
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 dark layer (i.e. the characters cut in intaglio word of black) (3), partially
The light selective transmission layer (2) that shakes is cholesteric crystal layer, and optical anisotropy transmission layer is nematic liquid crystal layer, in cholesteric phase liquid
Optical anisotropy transmission is distributed with the characters cut in intaglio word of crystal layer face process black, wherein polarised light selective transmission layer (2) both sides
Layer (1) and dark layer (i.e. the characters cut in intaglio word of black) (3), and optical anisotropy transmission layer (1) is located at polarised light selectivity
Above, structure is as shown in figure 1, form the optical anti-counterfeiting film apparatus of the present invention for transmission layer (2).Wherein optical anisotropy is transmitted
Layer (1) has two optical axis directions into 86 °, and phase delay is cholesteric phase under the optical anisotropy region of λ/4, vertical angle
The reflection peak wavelength of liquid crystal layer is 620nm, in dark aspect applying hot melt adhesives adhesion coating, it is copied in the form of opened window safety line and put
Into paper.Point opens smart mobile phone screen, and hiding for (direction of observation (c) is as shown by arrows) safety line windowing position can be observed
Information " SECUIRITY ", rotates mobile phone, hiding information can be observed and is exchanged between negative and positive effect, as shown in Figure 2.Different
Under viewing angle, the appearance color that the film apparatus can be observed is changed into that hollow out text can be observed under green, transmitted light from red
Word.The region of the different optical axis directions of optical anisotropy transmission layer (1) two is to the transmission rate variance of 620nm polarised light
29%.
Embodiment 2
The optical anti-counterfeiting film apparatus of the present invention comprising two layers of polarised light selective transmission layer (cholesteric crystal layer) (3) and
(4), the dark layer (5) between two layers of polarised light selective transmission layer, and be distributed in two layers of polarised light selective transmission
Two layers of optical anisotropy transmission layer (nematic liquid crystal layer) (1) and (2) above and below layer, wherein one layer of optical anisotropy transmission
Layer (1) have identical phase delay and optical axis direction into 80 ° two optical anisotropy regions (i.e. first area (a) with
Second area (b)), another layer of optical anisotropy transmission layer (2) has optical axis direction into 5 ° and phase delay differs the two of λ/4
Individual optical anisotropy region (i.e. first area (d) and second area (e)).In two layers of cholesteric crystal layer of normal viewing angles
(3) and (4) reflect yellow and green light respectively, its structure is as shown in Figure 3.This optical anti-counterfeiting film apparatus is applied to valuables
Product it is false proof.Included by the polarised light observable (direction of observation (c) is as shown by arrows) of smart mobile phone to device one side
Patterning hiding information, such as word " SECURITY " rotates the device, the text information that the face is included is in negative and positive effect
Between exchange, as shown in Figure 4 A.By the device turn-over, observable (direction of observation (f) is as shown by arrows) is wrapped to device another side
The hiding information of the different pattern contained, rotates the device, and the information that the face is included is same to exchange between negative and positive effect, such as schemes
Shown in 4B.
Embodiment 3
Optical anti-counterfeiting film apparatus of the present invention has optical anisotropy transmission layer (3), polarised light selective transmission layer (4)
And dark layer (blue oil layer of ink) (5), wherein optical anisotropy transmission layer (3) and dark layer (blue oil layer of ink) (5) distribution
In polarised light selective transmission layer (4) both sides, and optical anisotropy transmission layer (3) is located at polarised light selective transmission layer (4)
Above.Optical anisotropy transmission layer (3) is the nematic liquid crystal layer for λ/4 with identical optical axis direction but optical delay,
Polarised light selective transmission layer (4) is that left-handed cholesteric crystal layer (a) and dextrorotation cholesteric crystal layer (b) chromatography are formed, vertically
Cholesteric crystal layer reflection red light under angle, its structure is as shown in Figure 5.This film apparatus is used for top grade in the way of labelling
Commodity it is false proof.Smart mobile phone screen is opened it is observed that the hiding information that the labeling is included by linear polarizer or point, rotated
Labeling, the information included in it is exchanged between light and shade.The bright of left-right rotary cholesteric chromatography formation can be observed by circular polarizing disk
Information between dark phase.Direction of observation (c) as shown in arrow, when viewing angle from vertically to tilt when, the appearance color of the device
From fuchsin to green.
Embodiment 4
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), wavelength extension layer (3) and dark layer (i.e. black
Characters cut in intaglio word) (4), polarised light selective transmission layer (2) is cholesteric crystal layer, and optical anisotropy transmission layer (1) is nematic
Phase liquid crystal layer, in the characters cut in intaglio word of wavelength extension layer (3) surface printing black.The position relationship of each layer from top to bottom such as scheme by structure
Shown in 6, the optical anti-counterfeiting film apparatus of the present invention is formed.Wherein optical anisotropy transmission layer (1) has two optical axis directions
Into 86 °, phase delay be cholesteric crystal layer under the optical anisotropy region of λ/4, vertical angle reflection peak it is initial in
The a length of 610nm of cardiac wave, after wavelength extension layer is applied, the reflection peak centre wavelength of cholesteric crystal layer is 550nm, wave-length coverage
450-650nm, in dark aspect applying hot melt adhesives adhesion coating, it is put into paper with being copied in the form of opened window safety line.Point opens intelligence
Energy mobile phone screen, can be observed the hiding information at (direction of observation (c) is as shown by arrows) safety line windowing position
" SECUIRITY ", rotates mobile phone, hiding information can be observed and is exchanged between negative and positive effect, as shown in Figure 2.It is considerable under transmitted light
Observe hollow out word.The region of the different optical axis directions of optical anisotropy transmission layer (1) two is to 450-650nm polarised light
Average transmittance difference is 25%.
Claims (12)
1. optical anti-counterfeiting film apparatus, the optical anti-counterfeiting film apparatus at least includes：
1) one layer of optical anisotropy transmission layer,
2) one layer of polarised light selective transmission layer, and
3) a layer depth chromatograph,
Characterized in that, the optical anisotropy transmission layer, which at least includes two, has different optically anisotropic firstth areas
Domain and second area；
Wherein described optical anisotropy transmission layer and the dark layer are distributed in the polarised light selective transmission layer both sides, and
The optical anisotropy transmission layer is located at polarised light selective transmission layer above.
2. film apparatus as claimed in claim 1, it is characterised in that the dark layer opposite side of the optical anti-counterfeiting film apparatus
Also it has been symmetrically distributed the polarised light selective transmission layer and the optical anisotropy transmission layer.
3. film apparatus as claimed in claim 1 or 2, it is characterised in that the first area and second area are arranged to
With different optical axis directions and/or different phase delay.
4. film apparatus as claimed in claim 3, it is characterised in that the first area and second area are arranged to optical axis
Angular separation be 70 °~110 ° and with identical phase delay n λ/4, n be odd number or be arranged to optical axis direction angle be-
20 °~20 ° and phase delay difference n λ/2, n be odd number.
5. film apparatus as claimed in claim 1 or 2, it is characterised in that the tool that the optical anisotropy transmission layer includes
There are different optically anisotropic first areas and second area to be arranged to the arrangement of pixelation and constitute macroscopically have reality
The information of meaning, wherein described information can be identified by the device that can generate polarised light, such as mobile phone, computer etc. are all kinds of
Screen, polaroid, polarisation sunglasses of display device etc., preferably smart mobile phone screen.
6. film apparatus as claimed in claim 1 or 2, it is characterised in that the optical anisotropy transmission layer is nematic phase
Liquid crystal layer.
7. film apparatus as claimed in claim 1 or 2, it is characterised in that the polarised light selective transmission layer is circular polarization
Light selective transmission layer, it is preferable that the circularly polarized light selective transmission layer is cholesteric crystal layer.
8. film apparatus as claimed in claim 7, it is characterised in that the cholesteric crystal layer is left-handed cholesteric liquid crystal, the right side
Rotation cholesteric liquid crystal is made up of two regions that left-handed cholesteric liquid crystal and dextrorotation cholesteric liquid crystal are respectively constituted.
9. film apparatus as claimed in claim 1 or 2, it is characterised in that the dark layer at least absorb through optics it is each to
The light of different in nature transmission layer and circularly polarized light selective transmission layer 30%, preferably at least absorbs and passes through optical anisotropy transmission layer
With the light of circularly polarized light selective transmission layer 40%.
10. film apparatus as claimed in claim 1 or 2, it is characterised in that the dark layer is present at least at film apparatus
Regional area.
11. film apparatus as claimed in claim 1 or 2, it is characterised in that the polarised light selective transmission layer and the depth
Also comprising one layer of wavelength extension layer between chromatograph.
12. film apparatus as claimed in claim 11, 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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| CN201710431119.8A CN107132607A (en) | 2017-06-09 | 2017-06-09 | Optical anti-counterfeiting film apparatus |
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| CN201710431119.8A CN107132607A (en) | 2017-06-09 | 2017-06-09 | Optical anti-counterfeiting film apparatus |
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Family
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| CN201710431119.8A Pending CN107132607A (en) | 2017-06-09 | 2017-06-09 | Optical anti-counterfeiting film apparatus |
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| CN107798320A (en) * | 2017-11-20 | 2018-03-13 | 信利光电股份有限公司 | A kind of implicit pattern identification system and discrimination method |
| CN108507951A (en) * | 2018-03-06 | 2018-09-07 | 中国人民银行印制科学技术研究所 | Safe articles and its false distinguishing method and system, optical thin film and its manufacturing method |
| CN112154360A (en) * | 2018-05-31 | 2020-12-29 | 日本瑞翁株式会社 | Identification medium and method for identifying the authenticity of an identification medium |
| 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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| 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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Application publication date: 20170905 |