CN110989054A - Liquid crystal film lens and manufacturing method thereof - Google Patents
Liquid crystal film lens and manufacturing method thereof Download PDFInfo
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- CN110989054A CN110989054A CN201911272996.0A CN201911272996A CN110989054A CN 110989054 A CN110989054 A CN 110989054A CN 201911272996 A CN201911272996 A CN 201911272996A CN 110989054 A CN110989054 A CN 110989054A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 113
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 239000010410 layer Substances 0.000 claims abstract description 101
- 239000000758 substrate Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000011229 interlayer Substances 0.000 claims abstract description 11
- 238000000059 patterning Methods 0.000 claims abstract description 10
- 239000010409 thin film Substances 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000010408 film Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a method for manufacturing a liquid crystal film lens, which comprises the following steps: disposing a first photo-alignment layer on a first transparent substrate; disposing a second photo-alignment layer on a second transparent substrate; arranging a supporting bonding structure on the surface of the first transparent substrate on the side provided with the first photo-alignment layer; the first light orientation layer and the second light orientation layer are oppositely arranged, the first transparent substrate and the second transparent substrate are fixed in relative positions through the supporting and bonding structure, and a hollow interlayer is formed; patterning the first photo-alignment layer and the second photo-alignment layer; filling liquid crystal into the hollow interlayer to manufacture a liquid crystal layer; the liquid crystal layer has a concentric circular distribution pattern. The invention also discloses a liquid crystal film lens. The liquid crystal film lens and the manufacturing method provided by the invention can efficiently manufacture the optical superlens based on the liquid crystal material and reduce the manufacturing cost.
Description
Technical Field
The invention relates to a liquid crystal film, in particular to a liquid crystal film lens and a manufacturing method thereof.
Background
At present, the problems that the traditional lens is difficult to integrate and the small-scale processing is difficult are solved by manufacturing the planar super lens, a high-precision micro-nano processing method is required in a common planar super lens processing mode, a processing instrument required by the method is expensive generally, and the processing time is long, so that the manufacturing cost is overhigh and the production efficiency is overlow.
By using the liquid crystal material to manufacture the optical lens, the manufacturing cost can be reduced as a better alternative mode. However, the optical lens is made of liquid crystal material, and if the liquid crystal device is to realize special regulation and control of light, liquid crystal molecules need to be orderly arranged, and the process is generally called liquid crystal orientation. The common alignment method is a rubbing alignment technology, which is simple and efficient, but electrostatic and fluff impurities and the like are generated in the alignment process, so that the final alignment effect of the liquid crystal is influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for manufacturing a liquid crystal thin film lens, which can efficiently manufacture an optical superlens based on a liquid crystal material and reduce the manufacturing cost.
The invention also provides a liquid crystal film lens.
In a first aspect, an embodiment of the present invention provides a method for manufacturing a liquid crystal thin film lens, including:
disposing a first photo-alignment layer on a first transparent substrate;
disposing a second photo-alignment layer on a second transparent substrate;
arranging a supporting bonding structure on the surface of the first transparent substrate on the side provided with the first photo-alignment layer;
the first light orientation layer and the second light orientation layer are oppositely arranged, the first transparent substrate and the second transparent substrate are fixed in relative positions through the supporting and bonding structure, and a hollow interlayer is formed;
patterning the first photo-alignment layer and the second photo-alignment layer;
filling liquid crystal into the hollow interlayer to manufacture a liquid crystal layer;
the liquid crystal layer has a plurality of concentric annular regions.
The manufacturing method of the liquid crystal film lens provided by the embodiment of the invention at least has the following beneficial effects: an optical superlens based on a liquid crystal material is efficiently manufactured, manufacturing cost is reduced, and a directly usable liquid crystal thin film lens is manufactured by polymerizing liquid crystal into a thin film form.
According to another embodiment of the present invention, the supporting and bonding structure is an ultraviolet light curing adhesive containing silicon balls to effectively fix the relative positions of the first transparent substrate and the second transparent substrate, and a hollow interlayer is disposed.
Patterning the first photo-alignment layer and the second photo-alignment layer further comprises a preset concentric ring region pattern;
and transferring the non-adjacent concentric ring patterns in the concentric ring region patterns to the first photo-alignment layer and the second photo-alignment layer in two times.
According to other embodiments of the present invention, a method for manufacturing a liquid crystal thin film lens further includes: ultraviolet irradiation treatment to photopolymerize the liquid crystal material;
heat treatment to thermally polymerize the liquid crystal material;
and annealing to lower the temperature of the liquid crystal material.
According to the manufacturing method of the liquid crystal thin film lens, the second transparent substrate and the second optical alignment layer are peeled off, so that the liquid crystal layer is remained on the side, away from the first transparent substrate, of the first optical alignment layer.
According to the manufacturing method of the liquid crystal thin film lens in other embodiments of the present invention, the liquid crystal molecule orientation directions in adjacent circular ring regions in the liquid crystal layer are perpendicular to each other, so as to avoid the need of applying an electric field for pre-adjustment during the use or test of the conventional graded liquid crystal device.
According to the manufacturing method of the liquid crystal thin film lens in other embodiments of the present invention, the concentric circular ring distribution pattern may be obtained by a confidence domain algorithm, specifically:
setting a preset radius, an initial radius solution and a trust domain algorithm parameter;
obtaining an iteration increment in a trust domain range by using a trust domain algorithm, wherein the iteration increment comprises a direction and a step length;
and adding the iteration increment into the initial solution to form a new iteration solution, and judging the error of the iteration solution.
According to other embodiments of the present invention, a method for manufacturing a liquid crystal thin film lens further includes: if the error of the iterative solution is smaller than the initial solution, the iterative solution is reserved and is stored as a new initial solution;
if the error of the iterative solution is larger than the initial solution, the iterative solution is not stored, and the initial solution is kept as the initial solution;
judging whether the output solution meets the preset requirement or not, and if not, re-iterating; if yes, outputting the radius result.
In a second aspect, an embodiment of the present invention provides a liquid crystal thin film lens, including: a first transparent substrate;
a first light orientation layer is arranged on the first transparent substrate;
a supporting and bonding structure is arranged on the surface of the first transparent substrate on the side provided with the first photo-alignment layer;
and a liquid crystal layer is arranged on one side of the first optical orientation layer, which is far away from the first transparent substrate, and a plurality of concentric circular ring areas are arranged in the liquid crystal layer.
The liquid crystal film lens provided by the embodiment of the invention at least has the following beneficial effects: a directly usable liquid crystal thin film lens is manufactured by polymerizing liquid crystal into a thin film form.
According to other embodiments of the liquid crystal thin film lens of the present invention, the concentric circular ring regions include a horizontal light transmission region and a vertical light transmission region;
every two adjacent horizontal light-transmitting areas are spaced by one vertical light-transmitting area, so that a gap is formed;
every two adjacent vertical light transmission areas are spaced by one horizontal light transmission area, so that a gap is formed.
According to other embodiments of the liquid crystal thin film lens of the present invention, the liquid crystal molecular alignment directions in the horizontal light transmission region and the vertical light transmission region are perpendicular to each other.
Drawings
FIG. 1 is a schematic structural diagram of a liquid crystal thin film lens according to an embodiment of the present invention;
FIG. 2 is a top plan view of one of the liquid crystal thin film lenses of FIG. 1;
FIG. 3 is a schematic diagram of a design pattern of a Fresnel zone plate according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a method for fabricating a liquid crystal thin film lens according to an embodiment of the present invention;
FIG. 5 is a flow chart of obtaining the radius of the concentric ring distribution pattern according to an embodiment of the present invention;
fig. 6 to 8 are schematic diagrams of concentric ring pattern transfer according to an embodiment of the present invention.
Reference numerals: 10. a first transparent substrate; 20. a first photo-alignment layer; 30. a liquid crystal layer; 31. supporting the adhesive structure; 32. a first light-transmitting region; 33. a second light-transmitting region; 34. a vertical light-transmitting region; 35. a horizontal light transmitting area.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a liquid crystal thin film lens according to an embodiment of the invention. A liquid crystal thin film lens, comprising:
a first transparent substrate 10; a first photo-alignment layer 20 is provided on the first transparent substrate 10; a support adhesive structure 31 is provided on the surface of the first transparent substrate 10 on the side where the first photo-alignment layer 20 is provided; a liquid crystal layer 30 is disposed on a side of the first photo-alignment layer 20 away from the first transparent substrate 10, and a plurality of concentric circular ring regions are disposed in the liquid crystal layer 30.
The supporting adhesive structure 31 is disposed in the same layer as the liquid crystal layer 30.
The liquid crystal molecular alignment directions in the horizontal light transmission region 35 and the vertical light transmission region 34 are perpendicular to each other. The supporting adhesive structure 31 is an ultraviolet light curing adhesive containing silicon balls.
Referring to fig. 2, fig. 2 is a plan view of the liquid crystal thin film lens shown in fig. 1. As shown in fig. 2, the liquid crystal molecular alignment directions in the adjacent circular ring regions are perpendicular to each other. The liquid crystal layer 30 has a concentric circular distribution pattern. The supporting adhesive structures 31 are respectively disposed in the corner regions on the surface of the first transparent substrate 10, and the supporting adhesive structures 31 and the liquid crystal layer 30 are disposed on the same layer and separated from each other, so as to avoid the influence on the patterns disposed on the liquid crystal layer 30 due to the too close distance therebetween in the process of disposing the liquid crystal layer 30.
The concentric circular ring area comprises a horizontal light transmission area 35 and a vertical light transmission area 34; every two adjacent horizontal light-transmitting regions 35 are spaced by one vertical light-transmitting region 34, so that a gap is formed; every two adjacent vertical light-transmitting regions 34 are spaced apart by one horizontal light-transmitting region 35, so that a space is provided.
And the liquid crystal molecular alignment directions in the horizontal light transmission region 35 and the vertical light transmission region 34 are perpendicular to each other.
Referring to fig. 3, fig. 3 is a schematic diagram of a design pattern of a fresnel zone plate according to an embodiment of the present invention. As shown in fig. 3, the fresnel zone plate includes a first transparent region 32 and a second transparent region 33, and the liquid crystal molecular alignment directions of the two transparent regions are perpendicular to each other. The first light-transmitting areas 32 and the second light-transmitting areas 33 are both designed in a concentric circular ring pattern, and every two adjacent first light-transmitting areas 32 are isolated from each other by taking one second light-transmitting area 33 as an interval area; each adjacent two of the second light-transmitting regions 33 are spaced apart by one of the first light-transmitting regions 32 as a spacer. The characteristics of the fresnel zone plate are adjusted by adjusting the ring widths of the first and second light-transmitting areas 32 and 33, and fresnel zone plates with different characteristics are obtained. The light beam can be adjusted through Fresnel zone plates with different characteristics.
Referring to fig. 1 and 4 together, fig. 4 is a flow chart illustrating a method for manufacturing a liquid crystal thin film lens according to an embodiment of the invention. The method specifically comprises the following steps: providing a first photo-alignment layer 20 on a first transparent substrate 10;
disposing a second photo-alignment layer on a second transparent substrate;
providing a support adhesive structure 31 on a surface of the first transparent substrate 10 on the side where the first photo-alignment layer 20 is provided;
the first transparent substrate 10 and the second transparent substrate are oppositely arranged, the first light orientation layer 20 and the second light orientation layer fix the relative positions of the two through the supporting and bonding structure 31, and a hollow interlayer is formed;
patterning the first photo-alignment layer 10 and the second photo-alignment layer;
filling liquid crystal into the hollow interlayer to manufacture a liquid crystal layer 30;
the liquid crystal layer 30 has a concentric circular distribution pattern.
The supporting adhesive structure 31 is an ultraviolet light curing adhesive containing silicon balls.
Patterning the first photo-alignment layer 10 and the second photo-alignment layer further includes presetting concentric ring patterns;
and transferring the nonadjacent concentric ring patterns in the concentric ring patterns to the first photo-alignment layer and the second photo-alignment layer in two times.
Ultraviolet irradiation treatment to photopolymerize the liquid crystal material;
heat treatment to thermally polymerize the liquid crystal material;
annealing treatment to lower the temperature of the liquid crystal material;
and peeling the second transparent substrate and the second optical alignment layer to enable the liquid crystal layer to remain on the side, away from the first transparent substrate, of the first optical alignment layer.
The liquid crystal molecules in adjacent circles in the liquid crystal layer 30 are oriented in directions perpendicular to each other.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for obtaining a radius of a concentric ring distribution pattern according to an embodiment of the present invention. As shown in fig. 5, the concentric ring distribution pattern may be obtained by a confidence domain algorithm to calculate the ring width of each ring pattern in the concentric ring distribution pattern, specifically:
setting a preset radius, an initial radius solution and a trust domain algorithm parameter;
obtaining an iteration increment in a trust domain range by using a trust domain algorithm, wherein the iteration increment comprises a direction and a step length;
and adding the iteration increment into the initial solution to form a new iteration solution, and judging the error of the iteration solution.
If the error of the iterative solution is smaller than the initial solution, the iterative solution is reserved and is stored as a new initial solution;
if the error of the iterative solution is larger than the initial solution, the iterative solution is not stored, and the initial solution is kept as the initial solution;
judging whether the output solution meets the preset requirement or not, and if not, re-iterating; if yes, outputting the radius result.
Referring to fig. 6 to 8, as shown in fig. 6, the region to be patterned is divided, and the non-adjacent concentric ring patterns in the concentric ring patterns are transferred to the first photo-alignment layer and the second photo-alignment layer twice.
As shown in fig. 7, fig. 7 is a pattern of concentric rings of a first patterning transfer, and as shown in fig. 8, fig. 8 is a pattern of concentric rings of a second patterning transfer.
The first photo-alignment layer and the second photo-alignment layer are used for inducing and orienting liquid crystal molecules in the liquid crystal layer so that the liquid crystal molecules have a preset inclination angle.
The first photo-alignment layer and the second photo-alignment layer are patterned respectively by transferring the concentric ring distribution pattern in a stepwise manner so as to have different tilt angles in different regions using subsequently filled liquid crystal molecules. The tilt angle of the liquid crystal molecules is further adjusted so that the liquid crystal molecules of the adjacent circular ring regions are perpendicular to each other.
And filling a liquid crystal material in the hollow interlayer positioned between the first photo-alignment layer and the second photo-alignment layer to manufacture a liquid crystal layer. Since the first photo-alignment layer and the second photo-alignment layer are pre-patterned, different regions of the liquid crystal layer may have a predetermined tilt angle.
Heating the first transparent substrate and the second transparent substrate after combination, maintaining the heating table at 80 ℃, and filling the liquid crystal material into the hollow interlayer by utilizing the capillary phenomenon to manufacture the liquid crystal in the form of a liquid film.
After the liquid crystal material is completely filled, the temperature of the hot stage is reduced to 50 ℃, the temperature of the hot stage is kept unchanged, and the sample is irradiated by 1% intensity of surface light source ultraviolet light, so that the liquid crystal material is photopolymerized, and the irradiation time is 10 minutes.
And after the photopolymerization reaction is finished, heating the hot plate to 125 ℃, carrying out thermal polymerization on the liquid crystal material for 15 minutes, and then carrying out annealing treatment to peel the second transparent substrate and the second photo-alignment layer so as to ensure that the liquid crystal layer is remained on the side of the first photo-alignment layer, which is far away from the first transparent substrate.
Because the liquid crystal layer has concentric circular ring distribution patterns, and the liquid crystal molecule orientation of adjacent circular ring regions is vertical to each other, an electric field does not need to be arranged outside in the using process so as to carry out a pre-regulation and control mode.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A method for manufacturing a liquid crystal thin film lens is characterized by comprising the following steps:
disposing a first photo-alignment layer on a first transparent substrate;
disposing a second photo-alignment layer on a second transparent substrate;
arranging a supporting bonding structure on the surface of the first transparent substrate on the side provided with the first photo-alignment layer;
the first light orientation layer and the second light orientation layer are oppositely arranged, the first transparent substrate and the second transparent substrate are fixed in a relative position state through the supporting and bonding structure, and a hollow interlayer is formed;
patterning the first photo-alignment layer and the second photo-alignment layer;
filling liquid crystal into the hollow interlayer to manufacture a liquid crystal layer, wherein the liquid crystal layer is provided with a plurality of concentric circular ring areas.
2. The method of claim 1, wherein the supporting adhesive structure is an ultraviolet-curable adhesive containing silicon spheres.
3. The method of claim 1, wherein patterning the first photo-alignment layer and the second photo-alignment layer further comprises patterning a predetermined concentric ring region;
and transferring the preset concentric ring region pattern to the first photo-alignment layer and the second photo-alignment layer in two times.
4. The method for manufacturing a liquid crystal thin film lens according to claim 1, further comprising an ultraviolet irradiation treatment for photopolymerization of the liquid crystal material;
heat treatment to thermally polymerize the liquid crystal material;
annealing treatment to reduce the temperature of the liquid crystal material;
and peeling the second transparent substrate and the second optical alignment layer to enable the liquid crystal layer to remain on the side, away from the first transparent substrate, of the first optical alignment layer.
5. The method of claim 4, wherein the liquid crystal molecules in adjacent annular regions of the liquid crystal layer are oriented in a mutually perpendicular manner.
6. The method for manufacturing a liquid crystal thin film lens according to claim 3, wherein the concentric circular ring distribution pattern is obtained by a confidence domain algorithm, specifically:
setting a preset radius, an initial radius solution and a trust domain algorithm parameter;
obtaining an iteration increment in a trust domain range by using a trust domain algorithm, wherein the iteration increment comprises a direction and a step length;
and adding the iteration increment into the initial solution to form a new iteration solution, and judging the error of the iteration solution.
7. The method of manufacturing a liquid crystal thin film lens of claim 6, further comprising:
if the error of the iterative solution is smaller than the initial solution, the iterative solution is reserved and is stored as a new initial solution;
if the error of the iterative solution is larger than the initial solution, the iterative solution is not stored, and the initial solution is kept as the initial solution;
judging whether the output solution meets the preset requirement or not, and if not, re-iterating; if yes, outputting the radius result.
8. A liquid crystal thin film lens, comprising: a first transparent substrate;
a first light orientation layer is arranged on the first transparent substrate;
a supporting and bonding structure is arranged on the surface of one side of the first transparent substrate, which is provided with the first photo-alignment layer;
and a liquid crystal layer is arranged on one side of the first optical orientation layer, which is far away from the first transparent substrate, and a plurality of concentric circular ring areas are arranged in the liquid crystal layer.
9. The liquid crystal film lens of claim 8, wherein the concentric circular ring regions comprise a horizontal light transmission region, a vertical light transmission region;
every two adjacent horizontal light-transmitting areas are spaced by one vertical light-transmitting area, so that a gap is formed;
every two adjacent vertical light transmission areas are spaced by one horizontal light transmission area, so that a gap is formed.
10. The liquid crystal film lens of claim 9, wherein the liquid crystal molecular alignment directions in the horizontal light transmission region and the vertical light transmission region are perpendicular to each other.
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| CN201911272996.0A CN110989054B (en) | 2019-12-12 | 2019-12-12 | Liquid crystal film lens and manufacturing method thereof |
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| CN110989054B (en) | 2023-12-01 |
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