CN209560242U - A kind of liquid crystal polarized imaging lens arrangement and polarized imaging system - Google Patents
A kind of liquid crystal polarized imaging lens arrangement and polarized imaging system Download PDFInfo
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- CN209560242U CN209560242U CN201822002792.2U CN201822002792U CN209560242U CN 209560242 U CN209560242 U CN 209560242U CN 201822002792 U CN201822002792 U CN 201822002792U CN 209560242 U CN209560242 U CN 209560242U
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Abstract
The utility model discloses a kind of liquid crystal polarized imaging lens arrangement and polarized imaging systems.The device includes: substrate, alignment films and liquid crystal layer；Alignment films are set to the side of substrate, and liquid crystal layer is set to side of the alignment films far from substrate；Alignment films have molecule director in the control figure of setting distribution, so that the liquid crystal molecule in liquid crystal layer is self-assembled into the liquid crystal coke cone farmland periodic structure of setting；It includes that multiple liquid crystal cokes lacked that break with rotational symmetry bore farmland that liquid crystal coke, which bores farmland periodic structure, wherein the size on the liquid crystal coke cone farmland at least two periods is different.Liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model have the advantages that preparation process it is simple, it is at low cost and it is multifocal away from.
Description
Technical field
The utility model embodiment is related to target acquisition technical field more particularly to a kind of liquid crystal polarized imaging lens arrangement
And polarized imaging system.
Background technique
Optical signal includes the mutually independent information components such as amplitude, frequency, phase, polarization state, and common imaging technique can only
Detect the light intensity distributions of the certain wave band of object scene.Polarization imaging technological incorporation Polarization Detection, imaging obtain, image procossing
Etc. technological means, the image information and polarization information of lightwave signal can be obtained simultaneously.Since general detection target has respectively
Distinctive polarization characteristic index, such as degree of polarization, polarization azimuth and polarization ellipse rate can be in conjunction with two-dimensional image information
In this, as the foundation of detection identification.Therefore, polarization imaging technology is identifying hiding, camouflaged target, and underwater search tracking is airborne
Remotely sensed image, the micro- non-destructive testing of industry, the fields such as imaging of medical of biological pathological tissues suffer from good application prospect.
Traditional polarization imaging is generally basede on full Stokes vector polarization imaging or is realized based on focal plane arrays (FPA) method
Polarization imaging, but traditional polarized imaging system has the problem for realizing that technical difficulty is big and at high cost.It is how simple high
Realize that real-time light intensity imaging and the combination of polarization imaging function need further research in effect ground.
Utility model content
The utility model provides a kind of liquid crystal polarized imaging lens arrangement and polarized imaging system, to realize that simplification polarizes
As lens devices preparation process, reduce cost and increase polarization imaging lens devices focal length number beneficial effect.
In a first aspect, the utility model embodiment provides a kind of liquid crystal polarized imaging lens arrangement, which includes:
Substrate, alignment films and liquid crystal layer；
Alignment films are set to the side of substrate, and liquid crystal layer is set to side of the alignment films far from substrate；
Alignment films have molecule director in the control figure of setting distribution, so that the liquid crystal molecule self assembly in liquid crystal layer
Farmland periodic structure is bored at the liquid crystal coke of setting；
It includes that multiple liquid crystal cokes lacked that break with rotational symmetry bore farmland that liquid crystal coke, which bores farmland periodic structure, wherein at least two
The size on the liquid crystal coke cone farmland in a period is different.
Optionally, liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；Alignment films have molecule director distribution be in
The control figure of trellis, so that the liquid crystal molecule in liquid crystal layer is self-assembly of liquid crystal coke cone farmland array；
Wherein, the control figure of trellis includes multiple lines and multiple rows cell, size of the cell of odd-numbered line on column direction
Less than size of the even number line cell on column direction.
Optionally, liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；Alignment films have molecule director distribution be in
The control figure of trellis, so that the liquid crystal molecule in liquid crystal layer is self-assembly of liquid crystal coke cone farmland array；
Wherein, the control figure of trellis includes multiple row cell, includes multiple cells in each column cell, at least
Size of the two column unit lattice on line direction is different.
Optionally, central dividing line of the molecule director of the alignment films in each cell about the column direction of cell
Mirror symmetry, and the angle of the central dividing line of the column direction of the molecule director and cell of the alignment films in cell is
1≤40 ° of 1,30 °≤α of α；
In the odd-numbered line of each column cell, the molecule director of the alignment films in cell is in eight words；Each column cell
Even number line in, the molecule directors of the alignment films in cell is in positive eight word.
Optionally, the size range along line direction of each cell is 6um-22um, in the odd-numbered line of each column cell,
The range of the size along column direction of cell is 1-2um, in the even number line of each column cell, the ruler along column direction of cell
The very little range with the ratio of the size along line direction of cell is 1.6:1-2.1:1.
Optionally, it is in the control figure of concentric ring-shaped that alignment films, which have molecule director distribution, so that in liquid crystal layer
Liquid crystal molecule is self-assembly of concentric loop liquid crystal coke cone farmland periodic structure；It includes more that concentric loop liquid crystal coke, which bores farmland periodic structure,
A concentric loop liquid crystal coke bores the farmland period；
Wherein, the control figure of concentric ring-shaped includes multiple concentric loops, the liquid crystal coke cone farmland at least two periods
Size difference includes that the size at least two concentric loop liquid crystal cokes cone farmland period is different；Control at least two concentric circles in figure
The size of ring radially is different, so that the size at least two concentric loop liquid crystal cokes cone farmland period is different.
Optionally, the size for controlling multiple concentric loops in figure is gradually increased along the radial direction that circumference is directed toward in the center of circle.
Optionally, the size range of each concentric loop radially is 6um-22um.
Optionally, the molecule director mirror image pair of the alignment films of the center line two sides of each concentric loop in figure is controlled
Claim, and the folder of the tangent line of the center line of the molecule director and concentric loop of the alignment films of the center line two sides of each concentric loop
Angle is 2≤40 ° of 2,30 °≤α of α.
Optionally, the thickness range of liquid crystal layer is 1.3um-1.4um.
Second aspect, the utility model embodiment additionally provide a kind of polarized imaging system, which includes above-mentioned first
Liquid crystal polarized imaging lens arrangement and image acquisition and processing device described in aspect；
The optical axis of liquid crystal polarized imaging lens arrangement and image acquisition and processing device is located at same straight line；
The polarised light that polarization imaging lens devices are used to issue target acquisition object is modulated；
The side opposite with target acquisition object is arranged in image acquisition and processing device, for acquiring and handling modulated mesh
The light beam that mark detection object issues.
Liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model, by the molecule director for controlling alignment films
Distribution, so that in the liquid crystal coke cone farmland periodic structure that alignment films side is grown, the liquid crystal coke cone farmland at least two periods
Size is different, so that finally obtaining liquid crystal polarized imaging lens arrangement with multiple focal lengths, in addition, compared to the prior art
In polarization imaging device, liquid crystal polarized imaging lens arrangement preparation process is simple, it is easy to accomplish, and cost is relatively low, solves
Polarization imaging device realizes the big and at high cost problem of technical difficulty in the prior art, realize simplify preparation process, reduce at
The effect of this and increase focal length number.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model；
Fig. 2 is a kind of top view of the molecule director distribution of alignment films provided by the embodiment of the utility model；
Fig. 3 is the top view of the molecule director distribution of another alignment films provided by the embodiment of the utility model；
Fig. 4 is the coke of a kind of cell size provided by the embodiment of the utility model with the liquid crystal coke cone farmland accordingly grown
Away from correspondence diagram；
Fig. 5 is a kind of structural schematic diagram on liquid crystal coke cone farmland provided by the embodiment of the utility model；
Fig. 6 is that a kind of orthogonal polarizing microscope of liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model shines
Piece figure；
Fig. 7 is a kind of polarised light image of liquid crystal polarized imaging lens arrangement shown in Fig. 6；
Fig. 8 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Fig. 6；
Fig. 9 is the top view of the molecule director distribution of another alignment films provided by the embodiment of the utility model；
Figure 10 is the enlarged drawing in Fig. 9 at A；
Figure 11 is the top view of the molecule director distribution of another alignment films provided by the embodiment of the utility model；
Figure 12 is that the cross-polarized light of the liquid crystal polarized imaging lens arrangement of another kind provided by the embodiment of the utility model is micro-
Mirror photo figure；
Figure 13 is a kind of polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12；
Figure 14 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12；
Figure 15 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12；
Figure 16 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12；
Figure 17 is a kind of structural schematic diagram of polarized imaging system provided by the embodiment of the utility model；
Figure 18 is a kind of flow chart of the preparation method of polarization imaging lens devices provided by the embodiment of the utility model；
Figure 19 is a kind of pattern of mask plate provided by the embodiment of the utility model；
Figure 20 is the pattern of another mask plate provided by the embodiment of the utility model.
Specific 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 used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model, the dress
Set includes: substrate 30, alignment films 20 and liquid crystal layer 10.Alignment films 20 are set to the side of substrate 30, and liquid crystal layer 10 is set to
Side of the alignment films 20 far from substrate 30；Alignment films 20 have molecule director in the control figure of setting distribution, so that liquid crystal
Liquid crystal molecule in layer 10 is self-assembled into the liquid crystal coke cone farmland periodic structure of setting；It includes multiple tools that liquid crystal coke, which bores farmland periodic structure,
There is rotational symmetry to break scarce liquid crystal coke cone farmland, wherein the size on the liquid crystal coke cone farmland at least two periods is different.
Wherein, the control figure in alignment films 20 can be obtained by friction orientation or the modes such as photo orientated, also, be taken
There is anchoring effect to the liquid crystal molecule in liquid crystal layer 10 to film 20, so that the liquid crystal molecule of neighbouring alignment films 20 in liquid crystal layer 10
The arrangement of molecule director is identical as the molecule director arrangement of alignment films 20.In alignment films 20 to the liquid crystal molecule in liquid crystal layer 10
Anchoring effect and liquid crystal layer 10 far from 20 side air of alignment films to the liquid under the anchoring of liquid crystal effect, in liquid crystal layer 10
Brilliant molecular self-assembling bores farmland periodic structure at the liquid crystal coke of setting.
Liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model, by the molecule director for controlling alignment films
Distribution, so that in the liquid crystal coke cone farmland periodic structure that alignment films side is grown, the liquid crystal coke cone farmland at least two periods
Size is different, so that finally obtaining liquid crystal polarized imaging lens arrangement with multiple focal lengths, in addition, compared to the prior art
In polarization imaging device, liquid crystal polarized imaging lens arrangement preparation process is simple, it is easy to accomplish, and cost is relatively low, solves
Polarization imaging device realizes the big and at high cost problem of technical difficulty in the prior art, realize simplify preparation process, reduce at
The effect of this and increase focal length number.
The molecule director distribution of alignment films and the liquid crystal coke grown bore set-up mode there are many periodic structures of farmland, under
Face is described with regard to typical set-up, but does not constitute the restriction to the application.
Fig. 2 is a kind of top view of the molecule director distribution of alignment films provided by the embodiment of the utility model.Referring to figure
2, the molecule director distribution of alignment films controls figure in trellis, and the control figure of trellis includes multiple lines and multiple rows cell, each
Cell is 12um along the size of line direction, and size of the cell of odd-numbered line on column direction is 2um, even number line cell edge
Size on column direction is 6um.In odd-numbered line, the molecule director of the alignment films in each cell is in eight words 212；Even number
In row, the molecule director of the alignment films in each cell is in positive eight word 211.Since each positive correspondence of eight word 211 is grown to
One liquid crystal coke bores farmland, so, it is corresponding in each cell to grow a liquid crystal coke cone farmland in even number line；It is adjacent in odd-numbered line
Two cell intersections (as shown in dashed rectangle in Fig. 2) are corresponding to grow a smaller size liquid crystal coke cone farmland, i.e. odd-numbered line
The corresponding smaller size liquid crystal coke cone farmland grown the larger size liquid crystal coke cone farmland grown corresponding with even number line is staggered,
But size of the cell of odd-numbered line on column direction is less than the set-up mode of size of the even number line cell on column direction
So that the corresponding smaller liquid crystal coke cone farmland size grown is very small on the cell of odd-numbered line, it is saturating polarization imaging can not to be used as
Mirror, the corresponding liquid crystal coke cone farmland grown may be used as polarization imaging lens only on the cell of even number line, thus most throughout one's life
The liquid crystal coke cone farmland periodic structure that can be used as polarization imaging lens grown can regard corresponding life on the cell of even number line as
The multiple lines and multiple rows array structure that the liquid crystal coke cone farmland grown is formed, changes in turn convenient for the size of the cell by adjusting a certain column
Become the size on the corresponding liquid crystal coke cone farmland grown of the column.
It is understood that trellis can also be controlled figure by those skilled in the art is set as odd each cell along row
The size in direction is 12um, and size of the cell of odd-numbered line on column direction is 6um, and even number line cell is along column direction
Having a size of 2um.In even number line, the molecule director of the alignment films in each cell is in eight words 212；In odd-numbered line, each
The molecule director of alignment films in cell is in positive eight word 211.
Optionally, size of at least two column cells on line direction can also be set in the control figure of trellis not
Together.Fig. 3 is the top view of the molecule director distribution of another alignment films provided by the embodiment of the utility model.Referring to Fig. 3,
Size of the cell of three column on line direction is 16um, and size of the odd row cell lattice on column direction is 2um, even number line list
Size of first lattice on column direction is 8um；The cell of other column is 12um along the size of line direction, and odd row cell lattice are along column
The size in direction is 2um, and size of the even number line cell on column direction is 6um.It is arranged in this way so that tertial cell
The size on the liquid crystal coke cone farmland that upper correspondence is grown is greater than the ruler on the corresponding liquid crystal coke cone farmland grown on the cell of other column
Very little, even the molecule director distribution of alignment films is as shown in figure 3, the liquid crystal coke cone farmland period knot that then the alignment films side is grown
In structure, there are two liquid crystal cokes to bore farmland size for tool, then there are two focal lengths for the liquid crystal polarized imaging lens arrangement tool finally obtained.
It should be noted that Fig. 2 and Fig. 3 is merely exemplary to show the size of cell in control figure, but not to this
The restriction of application.Optionally, the size range along line direction of each cell is 6um-22um, the odd-numbered line of each column cell
In, the range of the size along the column direction of cell is 1-2um, in the even number line of each column cell, the edge column of cell
The range of the ratio of the size along line direction of the size and cell in direction is 1.6:1-2.1:1.The proportional region is avoided that
Hyperplasia or incompleteness occur during the growth process for liquid crystal coke cone farmland in cell, maintain the polarization correlated of liquid crystal coke cone farmland, meanwhile,
It is similar polarization correlated that fixed proportional region has the various sizes of burnt cone farmland lens grown.
Fig. 4 is the focal length of a kind of cell size provided in an embodiment of the present invention with the liquid crystal coke cone farmland accordingly grown
Correspondence diagram.As shown in figure 4, when trellis control figure cell along line direction size by 6 μm of consecutive variations extremely
At 22 μm, i.e., the size on the liquid crystal coke that accordingly grows cone farmland by 6 μm of consecutive variations to 22 μm when, liquid crystal coke bore the focal length on farmland by
17.1 μm of consecutive variations are to 45.6 μm.
Based on the above technical solution, optionally, the molecule director of the alignment films in each cell is about list
Central dividing line 221 (dotted line in Fig. 2 and Fig. 3) mirror symmetry of the column direction of first lattice, and point of the alignment films in cell
The angle of the central dividing line of the column direction of sub- director and cell is 1≤40 ° of 1,30 °≤α of α.Setting can mention in this way
High liquid crystal polarized imaging len it is polarization correlated.
Optionally, the thickness range of liquid crystal layer is 1.3um-1.4um.Liquid crystal polarized imaging len can be improved in setting in this way
Lens effect.
Fig. 5 is a kind of structural schematic diagram on liquid crystal coke cone farmland provided by the embodiment of the utility model.Below in conjunction with Fig. 5 into
One step illustrates that above-mentioned technical proposal improves the mechanism of the polarization correlated and lens effect of liquid crystal polarized imaging len.Referring to Fig. 5,
Liquid crystal coke cone farmland is made of splay deformable liquid crystal layer, wherein liquid crystal molecule is arranged perpendicular to liquid crystal layer, and liquid crystal coke cone farmland has
Two strip defect lines, respectively round 112 and by the center of circle straight line 111.Liquid crystal coke bores the symmetrical section 130 on the short side direction on farmland
It is interior, the molecule director of liquid crystal change profile in gradient, and the liquid crystal layer between adjacent lcd coke cone farmland is connected due to continuous transition
The needs connect can make the liquid crystal molecule arrangement disorder of the longitudinal direction on liquid crystal coke cone farmland, as two boundaries in longitudinal direction are cut
The molecule director disorder of liquid crystal shown in face 110 and 120 is arranged.The molecule director row of liquid crystal in section 110 and 120
The disorderization of cloth also has the arrangement for influencing the molecule director of 130 boundary liquid crystal of symmetrical section to a certain degree, works as unit
When the angle of the central dividing line of the column direction of the molecule director and cell of alignment films in lattice is within the scope of 30 ° -40 °,
Can in preferably stabilized symmetrical section 130 original molecule director change of gradient distribution so that in symmetrical section 130
The order degree of Liquid Crystal Molecules Alignment and the difference of the order degree of molecules align in section 110 and 120 are bigger, and then improve liquid
Brilliant coke bores the polarization correlated of farmland.In addition, the layer structure of liquid crystal layer is less, and liquid crystal layer is whole if the thickness of liquid crystal layer is excessively thin
The splay deformation of body is smaller, so that there is no the variations of apparent graded index on the liquid crystal coke cone farmland grown, causes liquid crystal burnt
The lens effect for boring farmland is weaker, and when the thickness of liquid crystal layer is in 1.3um-1.4um, there are bright on the liquid crystal coke cone farmland grown
Aobvious graded index variation, the i.e. lens effect on liquid crystal coke cone farmland are stronger.
Fig. 6 is that a kind of orthogonal polarizing microscope of liquid crystal polarized imaging lens arrangement provided by the embodiment of the utility model shines
Piece figure.It is in the control figure of trellis that the alignment films that liquid crystal polarized imaging lens arrangement in Fig. 6 uses, which have molecule director distribution,
Shape (as shown in Figure 2), in odd-numbered line, the corresponding liquid crystal for growing a smaller size of the boundary of each adjacent two cell is burnt
Bore farmland 150；In even number line, the corresponding liquid crystal coke cone farmland 140 for growing a larger size in each cell.Wherein, odd number
The liquid crystal coke cone farmland 150 of the smaller size grown in row cannot act as liquid crystal coke cone farmland lens, only occasionally due to undersized
The liquid crystal coke cone farmland 140 of the larger size grown in several rows just can be used as liquid crystal coke cone farmland lens, finally can be used as liquid crystal coke
The liquid crystal coke cone farmland 140 of cone farmland lens is embarked on journey neatly arranges in column, as shown in Figure 6.
Fig. 7 is a kind of polarised light image of liquid crystal polarized imaging lens arrangement shown in Fig. 6.Incident light is linearly polarized light,
The stacking direction of the direction of propagation of incident light liquid crystal layer along liquid crystal polarized imaging lens arrangement, the polarization direction of incident light is along perpendicular
Histogram is to vertical direction mentioned here refers to the direction parallel with the liquid crystal coke cone symmetry axis on farmland, as planar detector position
Positioned at the focal plane of liquid crystal polarized imaging lens arrangement.As shown in fig. 7, the linear polarization when incident beam is parallel to liquid
When the symmetrical axis direction on brilliant burnt cone farmland, liquid crystal polarized imaging lens arrangement imaging is the most clear, in alphabetical " E " sharply defined image.Fig. 8 is
Another polarised light image of liquid crystal polarized imaging lens arrangement shown in Fig. 6.As shown in figure 8, working as the linear polarization of incident beam
Direction perpendicular to liquid crystal coke cone farmland symmetrical axis direction when, the imaging of liquid crystal polarized imaging lens array is the fuzzyyest, alphabetical " E " as
It can not differentiate.As it can be seen that liquid crystal polarized imaging lens arrangement shows high Polarization-Sensitive characteristic, the polarization with incident light can be realized
The differentiation of directional correlation is imaged.
Fig. 9 is the top view of the molecule director distribution of another alignment films provided by the embodiment of the utility model.Figure 10
It is the enlarged drawing in Fig. 9 at A.Figure 11 is the molecule director distribution of another alignment films provided by the embodiment of the utility model
Top view.Referring to Fig. 9 and Figure 10, it is in the control figure of concentric ring-shaped that alignment films, which have molecule director distribution, wherein with one heart
Circular control figure includes multiple concentric loops, the molecule director of the alignment films of the center line two sides of each concentric loop
Mirror symmetry, and the center line of the molecule director and concentric loop of the alignment films of the center line two sides of each concentric loop is cut
The angle of line is 2≤40 ° of 2,30 °≤α of α.Illustratively, referring to Figure 10, a point P on the center line of concentric loop crosses P point
It can get a tangent line L of the center line of concentric loop, the molecule director of the alignment films of the center line two sides of concentric loop closes
It is α 2 in tangent line L mirror symmetry, and with the angle of tangent line L.It is understood that Fig. 9 is illustrated only in a setting radial direction
The arrangement situation of the molecule director of alignment films on direction, the selection of the setting radial direction are arbitrary, in the setting diameter
Other regions other than to direction, the arrangement situation of the molecule director of alignment films can according to analogizing to obtain (as shown in figure 11),
The molecule director of alignment films continuously gradually changes in concentric ring-shaped control figure, by secretly to bright expression alignment films in Figure 11
Molecule arrow direction from 0 ° of gradual change to 180 °.
Wherein, it is different to control the size of at least two concentric loops radially in figure, so that at least two is concentric
The size that annulus liquid crystal coke bores the farmland period is different.Setting can make finally formed liquid crystal polarized lens imaging device packet in this way
Include at least two focal lengths.The size that Fig. 9 and Figure 11 exemplarily only shows multiple concentric loops in control figure refers to along the center of circle
It is gradually increased to the radial direction of circumference, setting is so that the liquid crystal coke grown in the concentric loop in the center of circle bores farmland in this way
Size is smaller, and then the number on the liquid crystal coke cone farmland grown is relatively more, and the molecule of liquid crystal molecule is directed toward the angle for needing to deflect
It spends relatively small, is easy to deflect to the direction of setting.
Optionally, the size range of each concentric loop radially is 6um-22um.It is inclined that liquid crystal can be improved in setting in this way
Shake the polarization correlated of imaging len.
Figure 12 is that the cross-polarized light of the liquid crystal polarized imaging lens arrangement of another kind provided by the embodiment of the utility model is micro-
Mirror photo figure.It is in the control of concentric ring-shaped that the alignment films of the liquid crystal polarized imaging lens arrangement of Figure 12, which have molecule director distribution,
It charts shape (as in figures 9 or 11), so that the liquid crystal molecule in liquid crystal layer is self-assembly of concentric loop liquid crystal coke cone farmland week
Phase structure.Concentric loop liquid crystal coke cone farmland periodic structure includes multiple concentric loop liquid crystal coke cone farmland periods, each concentric loop
Liquid crystal coke was bored in the period of farmland, and continuous arrangement is in concentric loop along clockwise direction on multiple liquid crystal coke cones farmland, concentric loop liquid crystal
The size on liquid crystal coke cone farmland is gradually increased along the radial direction that circumference is directed toward in the center of circle in the coke cone farmland period.
Figure 13 is a kind of polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12.The polarization direction of incident light
Along the vertical direction, as planar detector position is located at the focal plane on the outmost turns coke cone farmland of liquid crystal polarized imaging lens arrangement.Such as
Shown in Figure 13, there are the radial consecutive variations in angular orientation in the image quality of liquid crystal polarized imaging lens arrangement, in radial direction
On direction, image quality is directed toward the radial direction of circumference from obscuring to clear variation along the center of circle；In angular orientation, image quality edge
Horizontal direction to vertical direction from clearly to smear out effect, i.e., liquid crystal polarized imaging lens arrangement be imaged clearest position be located at
Outmost turns position in the vertical horizontal direction of vertical polarization direction.
Figure 14 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12.With corresponding to Figure 13
The difference of imaging process be only that incident light polarization direction is 45 ° (be equivalent to vertical direction and rotate clockwise 45 °), such as scheme
Shown in 14, the liquid crystal polarized clearest imaging position of imaging lens arrangement is rotated to the direction vertical with polarization direction.When along incidence
When optical propagation direction is changed as planar detector position, the concentric loop in imaging where clearest position changes with image distance
It moves in the radial direction.It similarly, can be by where position clearest in imaging when constant as planar detector position
Concentric loop be which ring come it is counter push away target acquisition object relative to liquid crystal polarized imaging lens arrangement distance.
Figure 15 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12.With corresponding to Figure 13
The difference of imaging process be only that imaging device is located at the focal plane on the innermost circle coke cone farmland of liquid crystal polarized imaging lens arrangement
Place.In radial directions, image quality is directed toward along the center of circle justifies the image quality of liquid crystal polarized imaging lens arrangement as shown in figure 15
The radial direction in week is from clearly to smear out effect；In angular orientation, image quality in the horizontal direction to vertical direction from clearly to
Smear out effect, i.e., liquid crystal polarized imaging lens arrangement are imaged clearest position and are located at the horizontal direction vertical with vertical polarization direction
On innermost circle position.
Referring to Figure 13-Figure 15, it can be deduced that, liquid crystal polarized imaging lens arrangement shown in Figure 12 can be to target acquisition object
While blur-free imaging, generates and be distributed with the angular differentiation of the image quality of incident light polarization directional correlation, to obtain target
Object polarization characteristic is detected, while multifocal away from parameter based on liquid crystal polarized imaging lens arrangement, three-dimensional space imaging may be implemented.
Figure 16 is another polarised light image of liquid crystal polarized imaging lens arrangement shown in Figure 12.With corresponding to Figure 13
The difference of imaging process be, light that polarization direction is vertical direction and polarization direction are the light of horizontal direction while entered
It penetrates.As shown in figure 16, liquid crystal polarized imaging lens arrangement imaging is in the horizontal direction of outmost turns in clearly "×" picture
And in the vertical direction in clearly " " as.It can thus be seen that liquid crystal polarized imaging lens arrangement shown in Figure 12 can be rung
The different polarization component in incident beam is answered, by different polarization component difference blur-free imaging in different zones, and then may be implemented
More polarization complex imagings.
Figure 17 is a kind of structural schematic diagram of polarized imaging system provided by the embodiment of the utility model.The system includes upper
State any liquid crystal polarized imaging lens arrangement 410 and image acquisition and processing device 420 described in embodiment.It is liquid crystal polarized at
As the optical axis of lens devices 410 and image acquisition and processing device 420 is located at same straight line, polarization imaging lens devices 410 are used for
The polarised light issued to target acquisition object is modulated, and image acquisition and processing device 420 is arranged in opposite with target acquisition object
Side, the light beam issued for acquiring and handling modulated target acquisition object.
The polarized imaging system includes any liquid crystal polarized imaging lens arrangement 410 described above, thus the polarization
Imaging system has corresponding function and beneficial effect.
Based on inventive concept ibid, the utility model embodiment additionally provides a kind of preparation of polarization imaging lens devices
Method, Figure 18 are a kind of flow charts of the preparation method of polarization imaging lens devices provided by the embodiment of the utility model.The party
Method specifically includes:
S110, alignment films are formed in substrate side.
Wherein, substrate light transmission rate can be used illustratively can more than or equal to 85% flexible base board or rigid substrates
Think quartz glass or simple glass.Optionally, alignment films are photo orientated film.Before forming photo orientated film, to increase
The wellability and adhesiveness of photo orientated film and substrate carry out 30 points of ultrasonic cleaning with washing lotion (mix reagents such as acetone, alcohol)
Then clock is cleaned by ultrasonic twice with ultrapure water, each 10 minutes again.It is dried in 120 DEG C of baking ovens after forty minutes, it is (purple to carry out UVO
Outer ozone) cleaning 30 minutes.
Optionally, the material of photo orientated film includes in photo-crosslinking material, light degradation material and photic cis-trans isomerism material
At least one.
Optionally, photo orientated film is formed in the side of substrate, following manner can be used: by light control orientation material spin coating
The side of substrate, spin coating parameters are as follows: low speed spin coating 5 seconds, 800 revs/min of revolving speed, high speed spin coating 40 seconds, 3000 revs/min of revolving speed
Clock；Spin coating is had annealing of substrates 10 minutes of light control orientation material, annealing temperature is 100 DEG C, forms photo orientated film, thickness can
For 30nm-50nm.
S120, orientation process is carried out to alignment films, to form molecule director in the control figure of setting distribution.
S130, liquid crystal layer is formed far from substrate side in alignment films, the liquid in the control Graph Control liquid crystal layer of alignment films
Brilliant molecular self-assembling bores farmland periodic structure at the liquid crystal coke of setting；
Wherein, liquid crystal coke cone farmland periodic structure include it is multiple break scarce liquid crystal coke with rotational symmetry and bore farmland, at least two
The size on the liquid crystal coke cone farmland in a period is different.
Optionally, liquid crystal layer material is Smectic phase liquid crystal material, illustratively, can be joined for 4 '-n-octyl -4- cyano
Benzene.
Optionally, the method that is described to be coated with alignment films side spin coating Smectic phase liquid crystal material in substrate, spin coating being used,
Spin coating parameters are as follows: 60 DEG C of temperature controls, low speed spin coating 5 seconds, 800 revs/min of revolving speed, high speed spin coating 30 seconds, 2400 revs/min of revolving speed；
There is the substrate of 4 '-n-octyl -4- cyanobiphenyls to be slowly cooled to room temperature by 38 DEG C of nematic phase states with 0.2 DEG C/min spin coating.
Based on the above technical solution, optionally, orientation process is carried out to alignment films, is in form molecule director
Setting the control figure being distributed includes:
First time exposure is carried out to alignment films；Without exposure mask, inducing the polarization direction of light is first direction, right for exposure for the first time
Alignment films are uniformly directed；
Second is carried out to alignment films to expose；The mask plate of second of exposure includes shading region and transparent area；Shading region and
Transparent area forms gridded arrays pattern；Along line direction and column direction, shading region and transparent area are intervally arranged；Induce the polarization side of light
To for second direction, to alignment films patterned orientation, so that it is in the control figure of trellis that alignment films, which have molecule director distribution,；
Wherein, the angle of first direction and column direction is α 3,3≤60 ° of 50 °≤α；The angle of second direction and column direction is
4≤60 ° of 4,50 °≤α of α；First direction and second direction are about column direction mirror symmetry.
Figure 19 is a kind of pattern of mask plate provided by the embodiment of the utility model.Below with reference to Figure 19, illustratively retouch
It states and orientation process is carried out to alignment films, to form molecule director in the detailed process of the control figure of trellis.Setting is for the first time
For entire area exposure, inducing the polarization direction of light is 60 °, and polarization direction mentioned here is 60 ° and refers to vertical direction
Direction corresponding to 60 ° of rotation that (column direction of reticle pattern) is counterclockwise, is uniformly directed photo orientated film；Setting the
Secondary is patterned exposure, and the polarization direction of setting induction light is -60 °, using mask plate as shown in figure 19, wherein white
Region indicates transmission region, the region that can be exposed, and black region indicates lightproof area, i.e., without the region of exposure,
In trellis pattern, any cell (any one cell includes a black white region) is 12 μm along the length of line direction, even
Several rows of cell is 6 μm along the length of column direction, and odd row cell lattice are 2 μm along the length of column direction.Alignment films are carried out
After above-mentioned orientation process, the molecule director distribution of alignment films is as shown in Fig. 2, what the liquid crystal molecule of liquid crystal layer was self-assembly of
Liquid crystal coke cone farmland array is as shown in fig. 6, the liquid crystal coke cone farmland multiple lines and multiple rows that can be used as liquid crystal coke cone farmland lens are neatly arranged.
Optionally, orientation process is carried out to alignment films, includes: to form molecule director in the control figure of setting distribution
According to exposure order, corresponding exposure figure and corresponding induction light polarization direction are selected, is successively carried out multiple
Exposure；
Wherein, the exposure area that adjacent step exposure figure is arranged partly overlaps, and induction light polarization direction is with exposure order
It is increased monotonically or dullness reduces, so that it is in the control figure of concentric ring-shaped that alignment films, which have molecule director,；Concentric ring-shaped
Control figure include multiple concentric loops, the size of neighboring concentric annulus radially is different.
Figure 20 is the pattern of another mask plate provided by the embodiment of the utility model.Below with reference to Figure 20, illustratively
Description carries out orientation process to alignment films, to form molecule director in the detailed process of the control figure of concentric ring-shaped.Such as
It include 36 mask plates shown in Figure 20, black region is that exposure area, white area are not exposure area in each mask plate,
White area and to be formed by four fan-shaped central angles in the cricoid black region of circular arc be 25 °, and in adjacent sector
Angle between heart bisector is followed successively by 60 °, 120 °, 60 ° and 120 °.Select first mask plate, the polarization side of setting induction light
To being 30 °, polarization direction mentioned here is 30 ° and refers to direction corresponding to vertical direction 510 counterclockwise 30 ° of rotation,
Carry out first time exposure；Second mask plate is selected, the polarization direction of setting induction light is 35 °, carries out second and exposes；So
Afterwards, mask plate is successively selected according to direction shown in arrow, the polarization direction that induction light is then arranged in mask plate of every replacement increases
5 °, until selecting the 36th mask plate, the polarization direction of setting induction light is 205 °, carries out the 36th exposure.It covers
After film version carries out above-mentioned orientation process to alignment films, the molecule director distribution of alignment films is in the control figure of concentric ring-shaped
Shape, the size for controlling multiple concentric loops in figure are gradually increased along the radial direction that circumference is directed toward in the center of circle, so that liquid crystal layer
Liquid crystal molecule is self-assembly of concentric loop liquid crystal coke cone farmland periodic structure, the size edge on liquid crystal coke cone farmland in multiple concentric loops
The radial direction that circumference is directed toward in the center of circle is gradually increased.
It should be noted that Figure 20 merely exemplary orientation process shown through 36 exposure completion alignment films,
But the restriction not to the application, those skilled in the art can select pattern and the exposure time of mask plate according to the actual situation
Number, as long as the molecule director of alignment films can be made to be in the control figure of concentric ring-shaped.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (8)
1. a kind of liquid crystal polarized imaging lens arrangement characterized by comprising
Substrate, alignment films and liquid crystal layer；
The alignment films are set to the side of the substrate, and the liquid crystal layer is set to one of the alignment films far from the substrate
Side；
The alignment films have molecule director in the control figure of setting distribution, so that the liquid crystal molecule in the liquid crystal layer is certainly
It is assembled into the liquid crystal coke cone farmland periodic structure of setting；
The liquid crystal coke cone farmland periodic structure includes that multiple liquid crystal cokes lacked that break with rotational symmetry bore farmland；
The liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；It is in trellis that the alignment films, which have molecule director distribution,
Control figure so that the liquid crystal molecule in the liquid crystal layer be self-assembly of liquid crystal coke cone farmland array；
Wherein, the control figure of the trellis includes multiple lines and multiple rows cell, and the cell of odd-numbered line is along column direction
Size is less than size of the cell on column direction described in even number line；Alternatively,
The liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；It is in trellis that the alignment films, which have molecule director distribution,
Control figure so that the liquid crystal molecule in the liquid crystal layer be self-assembly of liquid crystal coke cone farmland array；
Wherein, the control figure of the trellis includes multiple row cell, includes multiple cells in each column cell, at least
Size of the two column cells on line direction is different；Alternatively,
It is in the control figure of concentric ring-shaped that the alignment films, which have molecule director distribution, so that the liquid crystal in the liquid crystal layer
Molecular self-assembling forms concentric loop liquid crystal coke and bores farmland periodic structure；The concentric loop liquid crystal coke cone farmland periodic structure includes more
A concentric loop liquid crystal coke bores the farmland period；
Wherein, the control figure of the concentric ring-shaped includes multiple concentric loops, the liquid crystal coke cone at least two periods
The size difference on farmland includes that the size at least two concentric loop liquid crystal cokes cone farmland period is different；At least two in the control figure
The size of a concentric loop radially is different, so that the size at least two concentric loops liquid crystal coke cone farmland period is not
Together.
2. the apparatus according to claim 1, which is characterized in that
If the liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；It is in lattice that the alignment films, which have molecule director distribution,
The control figure of shape, so that the liquid crystal molecule in the liquid crystal layer is self-assembly of liquid crystal coke cone farmland array；Wherein, the trellis
Control figure include multiple lines and multiple rows cell, size of the cell of odd-numbered line on column direction is less than described in even number line
Size of the cell on column direction；
The then center of column direction of the molecule director of the alignment films in each cell about the cell point
Secant mirror symmetry, and the center of the column direction of the molecule director of the alignment films in the cell and the cell
The angle of cut-off rule is 1≤40 ° of 1,30 °≤α of α；
In the odd-numbered line of each column cell, the molecule director of the alignment films in the cell is in eight words；Every list
In the even number line of first lattice, the molecule director of the alignment films in the cell is in positive eight word.
3. the apparatus according to claim 1, which is characterized in that
If the liquid crystal coke cone farmland periodic structure is that liquid crystal coke bores farmland array；It is in lattice that the alignment films, which have molecule director distribution,
The control figure of shape, so that the liquid crystal molecule in the liquid crystal layer is self-assembly of liquid crystal coke cone farmland array；Wherein, the trellis
Control figure include multiple row cell, include multiple cells, at least two column cell edges in each column cell
Size on line direction is different；
Then the size range along the line direction of each cell is 6um-22um, in the odd-numbered line of each column cell,
The range of the size along the column direction of the cell is 1-2um, in the even number line of each column cell, the cell
Range along the ratio of the size along the line direction of the size and cell of the column direction is 1.6:1-2.1:1.
4. the apparatus according to claim 1, which is characterized in that
If it is in the control figure of concentric ring-shaped that the alignment films, which have molecule director distribution, so that the liquid in the liquid crystal layer
Brilliant molecular self-assembling forms concentric loop liquid crystal coke and bores farmland periodic structure；The concentric loop liquid crystal coke bores farmland periodic structure
Multiple concentric loop liquid crystal cokes bore the farmland period；Wherein, the control figure of the concentric ring-shaped includes multiple concentric loops, at least
The size difference on the liquid crystal coke cone farmland in two periods includes that at least two concentric loop liquid crystal cokes bore the size in farmland period not
Together；The size of at least two concentric loops radially is different in the control figure, so that at least two concentric circles
The size that ring liquid crystal coke bores the farmland period is different；
Then the size of multiple concentric loops is gradually increased along the radial direction that circumference is directed toward in the center of circle in the control figure.
5. the apparatus according to claim 1, which is characterized in that the size range of each concentric loop radially is
6um-22um。
6. the apparatus according to claim 1, which is characterized in that the center of each concentric loop in the control figure
The molecule director mirror symmetry of the alignment films of line two sides, and the described of the center line two sides of each concentric loop takes
Angle to the tangent line of the center line of the molecule director and concentric loop of film is 2≤40 ° of 2,30 °≤α of α.
7. the apparatus according to claim 1, which is characterized in that the thickness range of the liquid crystal layer is 1.3um-1.4um.
8. a kind of polarized imaging system, which is characterized in that filled including liquid crystal polarized imaging len as claimed in claim 1 to 7
It sets and image acquisition and processing device；
The optical axis of the liquid crystal polarized imaging lens arrangement and described image acquisition processing device is located at same straight line；
The polarised light that the polarization imaging lens devices are used to issue target acquisition object is modulated；
The side opposite with target acquisition object is arranged in described image acquisition processing device, for acquiring and handling modulated mesh
The light beam that mark detection object issues.
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