CN207281429U - One kind polarizes relevant flat liquid crystal lens - Google Patents
One kind polarizes relevant flat liquid crystal lens Download PDFInfo
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- CN207281429U CN207281429U CN201720930136.1U CN201720930136U CN207281429U CN 207281429 U CN207281429 U CN 207281429U CN 201720930136 U CN201720930136 U CN 201720930136U CN 207281429 U CN207281429 U CN 207281429U
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Abstract
The utility model polarizes relevant flat liquid crystal lens to be a kind of, this flat liquid crystal lens separation particle keeps opposite diyl plate spacing, two substrate medial surfaces are covered with electrode film and photo orientated film, it is liquid crystal layer between substrate, the liquid crystal molecule director of the microcell Graph Control liquid crystal layer of multiple concentric circles of molecule director orientation cycle gradual change presses the periodicity graded profile of its concentric circles in photo orientated film.There is voltage difference between the electrode film of two substrates of flat liquid crystal lens.The efficiency of the utility model liquid crystal lens improves, and simple in structure, easy to process, and the yield of product improves, and manufacturing cost reduces.
Description
Technical field
It the utility model is related to liquid crystal aligning control technology field, more particularly to a kind of to polarize relevant flat liquid crystal saturating
Mirror.
Background technology
Augmented reality is a kind of position for calculating camera image in real time and angle and the skill for adding respective image
Art.Can be " seamless " integrated by real world information and virtual world information, script real world certain time space model
It is difficult to be superimposed again after the entity information (visual information, sound, tactile etc.) experienced is emulated by computer simulation in enclosing, will be virtual
Information application to real world, perceived by human sensory, so as to reach the sensory experience of exceeding reality, realize true environment
Be added to same picture or space in real time with dummy object.
Augmented reality not only in the application field similar with virtual reality technology, due to it has can be to true
Environment carries out the characteristic of enhancing display output, is set in medical research, precision instrument manufacture and maintenance, military aircraft navigation, engineering
The field such as meter and tele-robotic control, has the advantage more more obvious than VR technology.
Existing liquid crystal lens are mainly liquid crystal toroidal lens or cylindrical lenses, need to be made by resin die, difficult processing
Spend high, of high cost, and product qualification rate is low, and the diffraction efficiency of gained binary lens device is only up to 41%.And because existing
Most of liquid crystal lens are nonplanar optical element, it uses also restrained.
Utility model content
The purpose of this utility model, which is that design is a kind of, polarizes relevant flat liquid crystal lens, first substrate and second substrate phase
Pair and put, spacer particle keeps the two spacing, and two substrate medial surfaces are covered with electrode film and photo orientated film, are liquid crystal between substrate
Layer, the liquid crystal in photo orientated film in the microcell Graph Control liquid crystal layer of multiple concentric circles of molecule director orientation cycle gradual change
Molecule director presses the periodicity graded profile of its concentric circles.The efficiency of this liquid crystal lens improves, and simple in structure, and cost is low.
A kind of relevant flat liquid crystal lens of polarization of the utility model design include the first transparent base being oppositely arranged
Plate and second substrate, and the liquid crystal layer between the first substrate and second substrate.
Uniformly distributed spacer particle is provided between the first substrate and second substrate, keeps the spacing of two substrates uniform,
Support the liquid crystal layer.The spacer particle is the insulation ball of 3~8 microns identical of diameter, and the spacing of adjacent spaces particle is 3
~8 microns.Adjust the distance between size Control first substrate and second substrate of spacer particle.
Electrode film is respectively with the first substrate medial surface opposite with second substrate, two electrode film is opposite
Photo orientated film is respectively with medial surface.The photo orientated film has molecule director orientation in two-dimensional and periodic gradual change point
The microcell figure of the concentric structure of cloth, the microcell Graph Control liquid crystal of molecule director orientation cycle gradual change in photo orientated film
The periodicity graded profile of liquid crystal molecule director in layer, makes the circularly polarized light of incident liquid crystal lens be converted to focusing spy
The emergent light of property.
The microcell figure is n concentric gradual change annulus, and 2≤n≤50, each annulus is a gradual period, same micro-
N donut is tapered into from center to External Periodic in area's figure, n donut from center to outer shroud on it is photo orientated
Membrane molecule pointing direction is gradient to from 0 ° close to 180 °.
Further, the liquid crystal layer is dual-frequency liquid crystal, and dual-frequency liquid crystal is mixed by positivity liquid crystal and negative liquid crystal,
Its dielectric anisotropy is just during additional low frequency electric field, its dielectric anisotropy is negative during high-frequency electric field；The photo orientated film
Material be azo dyes.
Have a voltage difference between two electrode films of this flat liquid crystal lens, the electrode film on first substrate and second substrate it
Between predeterminated voltage difference be 25 volts.
Compared with prior art, it is the advantages of a kind of polarization of the utility model relevant flat liquid crystal lens：1st, it is light-operated to take
The periodicity graded profile of liquid crystal molecule director into film in the microcell Graph Control liquid crystal layer of molecule director orientation, enters
The circularly polarized light for penetrating this liquid crystal lens is converted to the emergent light with focusing or divergence characterization；2nd, liquid crystal layer is to polarization sensitive
Material, the double-focusing properties of this liquid crystal lens can control heat by the polarization state of incident light, by selecting right-hand circular polarization to enter
Light or Left-hand circular polarization incident light are penetrated, the diffraction pattern of different polarization state, the lens array integrated by this example lens can be obtained
Row can meet that augmented reality such as shows at the application demand in field；3rd, extra electric field is set as 25V, and during 1kHz/80kHz, electric field is made
With the lower work response time for obtaining sub- millisecond magnitude bifocal；4th, the diffraction efficiency of this flat liquid crystal lens improves aobvious
Write, theoretical efficiency 100%, experiment measures efficient up to 95%；5th, it is planar optical elements, it is light, it is easy of integration, and electric light can
Adjust, polarize controllable and broadband and be applicable in, and it is simple in structure, it is of low cost, suitable for the application of augmented reality.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the relevant flat liquid crystal lens embodiment of this polarization；
Fig. 2 is the molecule director orientation of the relevant flat liquid crystal lens embodiment photo orientated film of this polarization in two dimension week
The microcell pictorial diagram of phase property graded profile；
Fig. 3 is liquid crystal molecule director orientation cycle gradual change in the relevant flat liquid crystal lens embodiment liquid crystal layer of this polarization
The simulation schematic diagram of distribution；
Fig. 4 a are that the double-focusing properties focal length f of the relevant flat liquid crystal lens embodiment of this polarization is positive schematic diagram；
Fig. 4 b are that the double-focusing properties focal length f of the relevant flat liquid crystal lens embodiment of this polarization is negative schematic diagram；
Fig. 5 a are the characteristics of non-reciprocity schematic diagram of the relevant flat liquid crystal lens embodiment of this polarization；
Fig. 5 b are the characteristics of non-reciprocity schematic diagram of the relevant flat liquid crystal lens embodiment of this polarization.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is only used for explaining the utility model, rather than the restriction to the utility model.Further need exist for illustrating
, for the ease of description, part relevant with the utility model rather than entire infrastructure are illustrate only in attached drawing.
The relevant flat liquid crystal lens embodiment cross-section structure of this polarization is as shown in Figure 1, transparent including what is be oppositely arranged
First substrate 11 and second substrate 12, and positioned at the first substrate 11 and the liquid crystal layer 13 of second substrate 12；Wherein, originally
A diameter of 5 microns of insulating spherical spacer particle 14 is evenly equipped with example first substrate 11, the spacing of adjacent spacer particle is micro- for 5
Rice.
Electrode film 111,121, two electrodes are respectively with the medial surface opposite with second substrate 12 of this example first substrate 11
Photo orientated film 15 is respectively with 111,121 opposite medial surface of film.This example photo orientated film 15 has molecule director side
To the microcell figure of the n=30 concentric circles composition in two-dimensional and periodic graded profile, each light and dark donut is
One gradual period, n donut are tapered into from center to External Periodic, n donut from center to outer shroud on light
Control orientation membrane molecule pointing direction is gradient to 180 ° from 0 °, as shown in Figure 2；The grappling of the microcell figure of photo orientated film 15 is made
With the liquid crystal molecule director in control liquid crystal layer is in multiple concentric circles of periodicity graded profile, and each annulus is a week
Phase.When incident light ordinary light and extraordinary ray phase difference be equal to π in the case of under polarizing microscope this example liquid crystal lens
The texture of embodiment as shown in figure 3, the liquid crystal director direction in multiple donuts each cycle is in graded profile, in figure by
Secretly arrive bright expression liquid crystal director direction and fade to 180 ° from 0 °.
The liquid crystal layer that this example polarizes relevant flat liquid crystal lens is dual-frequency liquid crystal；This example dual-frequency liquid crystal uses one kind
Special liquid crystal (JC-DFLC-01), is mixed by positivity liquid crystal and negative liquid crystal.Dual-frequency liquid crystal has in additional low-frequency electrical
When material dielectric anisotropy for just, dielectric anisotropy is negative characteristic during high-frequency electric field.The photo orientated film
Material is azo dyes.
When the space director of liquid crystal aligning layer is in periodicity graded profile, meet PB (Pancharatnam-Berry)
During the profile of phase lens, from diffractive principle, by uneven distribution of the PB phases in space, light spreads out by different
Firing angle is oriented to different directions.Unlike traditional Fresnel lens, PB phases lens suppress high level in working status
Diffraction, only exist three diffraction times, correspond to zero level and positive and negative level-one respectively, its positive and negative two level of level-one is shown as respectively
Convergence and the state of diverging, therefore PB phase Lenses Diffractive efficiency greatly improves.
This example, which polarizes, sets molecule director orientation in two dimension week on the photo orientated film 15 of relevant flat liquid crystal lens
The control pattern of phase property graded profile, under the control of the control pattern, the liquid crystal molecule director in the liquid crystal layer is in
Periodicity graded profile, equivalent to PB phase lens, also only exists three diffraction times of zero level and positive and negative level-one.
The spacer particle that this example is polarized between two substrates of relevant flat liquid crystal lens can be chosen as needed, with adjustment
The distance between first substrate and second substrate.A diameter of 5 microns of spacer particle selecting when this example is tested, realize into
The phase difference for penetrating ordinary light and extraordinary ray of the light in this example liquid crystal lens is more than or equal to π, and control at this time is applied to this
Voltage difference on example two electrode film of liquid crystal lens, makes zero level Gaussian beam disappear, the diffraction effect of the positive and negative level-one of this example liquid crystal lens
It can reach 100% on rate theory, this example reaches 95% in implementing.
The relevant flat liquid crystal lens embodiment of this polarization does not limit, it can be achieved that to any wavelength the wavelength of incident light
The focussing force of incident light.This liquid crystal lens embodiment produces the incident light of different polarization pattern the different effects being converging or diverging with
Fruit.Fig. 4 a and Fig. 4 b are this liquid crystal lens embodiment double-focusing properties schematic diagram, and Fig. 4 a are represented, when incident light is right-hand circular polarization
During RHC (the angle angle of polarizer and quarter-wave plate optical axis is -45 °), through this liquid crystal lens embodiment, negative one is converted to
The focal beam spot of order diffraction, i.e. emergent light focus on the focal point of opposite side, and transformed emergent light is left circularly polarized light, this
The focal length f of liquid crystal lens embodiment is just.Fig. 4 b are represented, when incident light is Left-hand circular polarization LHC (polarizer and quarter-wave
The angle angle of piece optical axis is 45 °) when, through this liquid crystal lens embodiment, the diverging hot spot of positive first-order diffraction is converted to, that is, is emitted
Light focuses on the focal point of opposite side, and transformed emergent light is right-circularly polarized light, and the focal length f of this liquid crystal lens embodiment is
It is negative.
Liquid crystal lens provided in this embodiment have nonreciprocity feature.By taking incident right-handed rotation as an example, when liquid crystal lens and light
Convex lens (f ＞ 0) are shown as when the direction of propagation is consistent；Concave lens is shown as when liquid crystal lens are opposite with optical propagation direction
(f ＜ 0).Fig. 5 a and Fig. 5 b are the characteristics of non-reciprocity schematic diagram that this liquid crystal lens embodiment has.It is inclined for the circle of specific polarization
Light, when incident light is right-hand circular polarization and the direction of propagation identical with lens direction, negative one level is converted to through the liquid crystal lens
The focal beam spot of diffraction, as shown in fig. 4 a；When incident light is right-hand circular polarization and the direction of propagation opposite with lens direction, through institute
The diverging hot spot that liquid crystal lens are converted to negative one order diffraction is stated, as shown in Figure 5 a；Similarly in left circularly polarized light, the direction of propagation with
When lens direction is identical, the diverging hot spot of negative one order diffraction is converted to through the liquid crystal lens, as shown in Figure 4 b；When incident light is
When Left-hand circular polarization and the direction of propagation opposite with lens direction, the focusing light of negative one order diffraction is converted to through the liquid crystal lens
Spot, as shown in Figure 5 b.
The liquid crystal layer of this example liquid crystal lens is dual-frequency liquid crystal；The distinguishing feature of dual-frequency liquid crystal is its dielectric anisotropy with outer
Power up the change of field frequencies range and change.Dual-frequency liquid crystal dielectric constant anisotropy used in the liquid crystal layer with frequency rise by
Decrescence small, dielectric anisotropy is zero when reaching critical frequency, more than being changed into negative value after critical frequency.This example is in 1kHz and following
Low frequency electric field under, molecule is arranged along direction of an electric field, the phase of ordinary light and extraordinary ray of the incident light in the liquid crystal lens
Potential difference is zero, and liquid crystal lens, can be as the OFF state of the liquid crystal lens without being converging or diverging with acting on；This example 80kHz's
Under high-frequency electric field, molecule is arranged perpendicular to direction of an electric field, and liquid crystal lens have the diffraction being converging or diverging with, and can be used as described
Liquid crystal lens first-order diffraction ON state.
Compared with nematic liquid crystal box, it is dual-frequency liquid crystal box that this example, which polarizes relevant flat liquid crystal lens, is had faster
Response time and the phase in version of bigger.By taking incident dextrorotation rotatory polarization as an example, the first base of this example liquid crystal lens is applied to by control
Electric voltage frequency on plate and second substrate is respectively 1khz and 80khz, produces the voltage difference of low-and high-frequency consecutive variations.It is saturating in liquid crystal
Measuring the response time that liquid crystal lens switch between ON state and OFF state at the job spotlight of mirror controls in sub- millisecond magnitude.
Above-described embodiment, is only further described the purpose of this utility model, technical solution and beneficial effect
Specific case, the utility model are not limited to this.All any modifications made within the scope of disclosure of the utility model,
Equivalent substitution, improvement etc., are all contained within the scope of protection of the utility model.
Claims (6)
1. one kind polarizes relevant flat liquid crystal lens, including the transparent first substrate and second substrate being oppositely arranged, and
Liquid crystal layer between the first substrate and second substrate, it is characterised in that including：
Uniformly distributed spacer particle is provided between the first substrate and second substrate, keeps the spacing of two substrates uniform, support
The liquid crystal layer；Electrode film, the two electrode films phase are respectively with the first substrate medial surface opposite with second substrate
To medial surface on be respectively with photo orientated film；The photo orientated film have molecule director orientation in two-dimensional and periodic gradually
Become the microcell figure of the concentric structure of distribution, the microcell Graph Control of molecule director orientation cycle gradual change in photo orientated film
The periodicity graded profile of liquid crystal molecule director in liquid crystal layer, makes the circularly polarized light of incident liquid crystal lens be converted to poly-
The emergent light of burnt characteristic.
2. the relevant flat liquid crystal lens of polarization according to claim 1, it is characterised in that：
The microcell figure is n gradual change annulus with one heart, 2≤n≤50, and each annulus is a gradual period, same microcell figure
N donut is tapered into from center to External Periodic in shape, n donut from center to outer shroud on photo orientated film point
Sub- pointing direction is gradient to from 0 ° close to 180 °.
3. the relevant flat liquid crystal lens of polarization according to claim 1, it is characterised in that：
The liquid crystal layer is dual-frequency liquid crystal, and dual-frequency liquid crystal is mixed by positivity liquid crystal and negative liquid crystal, in additional low frequency electric field
When its dielectric anisotropy for just, its dielectric anisotropy is negative during high-frequency electric field.
4. the relevant flat liquid crystal lens of polarization according to claim 1, it is characterised in that：
The material of the photo orientated film is azo dyes.
5. the relevant flat liquid crystal lens of polarization according to claim 1, it is characterised in that：
The spacer particle is the insulation ball of 3~8 microns identical of diameter, and the spacing of adjacent spaces particle is 3~8 microns.
6. the relevant flat liquid crystal lens of polarization according to any one of claim 1 to 5, it is characterised in that：
There is a voltage difference between described two electrode films of flat liquid crystal lens, between the electrode film on first substrate and second substrate
Predeterminated voltage difference be 25 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720930136.1U CN207281429U (en) | 2017-07-28 | 2017-07-28 | One kind polarizes relevant flat liquid crystal lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720930136.1U CN207281429U (en) | 2017-07-28 | 2017-07-28 | One kind polarizes relevant flat liquid crystal lens |
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| CN207281429U true CN207281429U (en) | 2018-04-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107229161A (en) * | 2017-07-28 | 2017-10-03 | 广西天山电子股份有限公司 | It is a kind of to polarize related flat liquid crystal lens and preparation method thereof |
| CN109307967A (en) * | 2018-11-30 | 2019-02-05 | 苏州晶萃光学科技有限公司 | A kind of liquid crystal film and preparation method thereof |
| WO2020162945A1 (en) | 2019-02-07 | 2020-08-13 | Facebook Technologies, Llc | Active flexible liquid crystal optical devices |
| JP2021528683A (en) * | 2018-06-15 | 2021-10-21 | マジック リープ， インコーポレイテッドＭａｇｉｃ Ｌｅａｐ，Ｉｎｃ． | How to process LCD optics with wide field polarization switches and pretilts |
| CN113960798A (en) * | 2021-11-03 | 2022-01-21 | 上海鱼微阿科技有限公司 | Large-caliber optical assembly |
| CN114690287A (en) * | 2022-03-01 | 2022-07-01 | 南方科技大学 | Liquid crystal polarization lens group, preparation method and multi-focal-plane display system |
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- 2017-07-28 CN CN201720930136.1U patent/CN207281429U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107229161A (en) * | 2017-07-28 | 2017-10-03 | 广西天山电子股份有限公司 | It is a kind of to polarize related flat liquid crystal lens and preparation method thereof |
| JP2021528683A (en) * | 2018-06-15 | 2021-10-21 | マジック リープ， インコーポレイテッドＭａｇｉｃ Ｌｅａｐ，Ｉｎｃ． | How to process LCD optics with wide field polarization switches and pretilts |
| JP7360405B2 (en) | 2018-06-15 | 2023-10-12 | マジック リープ， インコーポレイテッド | Method of fabricating liquid crystal optical elements with wide-field polarization switch and pretilt |
| US12007652B2 (en) | 2018-06-15 | 2024-06-11 | Magic Leap, Inc. | Wide field-of-view polarization switches and methods of fabricating liquid crystal optical elements with pretilt |
| CN109307967A (en) * | 2018-11-30 | 2019-02-05 | 苏州晶萃光学科技有限公司 | A kind of liquid crystal film and preparation method thereof |
| CN109307967B (en) * | 2018-11-30 | 2024-03-22 | 南京晶萃光学科技有限公司 | Liquid crystal film and preparation method thereof |
| WO2020162945A1 (en) | 2019-02-07 | 2020-08-13 | Facebook Technologies, Llc | Active flexible liquid crystal optical devices |
| CN113424097A (en) * | 2019-02-07 | 2021-09-21 | 脸谱科技有限责任公司 | Active flexible liquid crystal optical device |
| EP3921693A4 (en) * | 2019-02-07 | 2022-03-23 | Facebook Technologies, LLC. | Active flexible liquid crystal optical devices |
| CN113960798A (en) * | 2021-11-03 | 2022-01-21 | 上海鱼微阿科技有限公司 | Large-caliber optical assembly |
| CN114690287A (en) * | 2022-03-01 | 2022-07-01 | 南方科技大学 | Liquid crystal polarization lens group, preparation method and multi-focal-plane display system |
| CN114690287B (en) * | 2022-03-01 | 2023-12-12 | 南方科技大学 | Liquid crystal polarized lens group, preparation method and multi-focal-plane display system |
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