CN211293544U - Novel zoom plane lens assembly - Google Patents

Abstract

The utility model discloses a novel zoom plane lens component, which comprises a first liquid crystal lens, a second liquid crystal lens and a super lens with fixed focal length, which are connected in series; under the state of no electric field, the arrangement direction of molecules in a first liquid crystal layer of the first liquid crystal lens is parallel to the integral mirror surface direction of the first liquid crystal lens, the arrangement direction of molecules in a second liquid crystal layer of the second liquid crystal lens is parallel to the integral mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the second liquid crystal layer are mutually vertical; the molecular arrangement states of the first liquid crystal layer and the second liquid crystal layer are adjusted by applying electric fields to the first liquid crystal layer and the second liquid crystal layer respectively and regulating and controlling the electric field intensity; the planar lens adopts a superlens with a fixed focal length. Based on the combination of the liquid crystal lens and the super lens which are arranged in a cascade manner, the plane lens group has an electric control zooming function, is insensitive to polarization, realizes a high-quality imaging effect and promotes the practical application of the plane lens technology.

Description

Novel zoom plane lens assembly

Technical Field

The utility model relates to a lens technology field, concretely relates to novel zoom plane lens subassembly.

Background

Optical imaging systems play an increasingly important role in modern people's daily life and industrial applications, and lenses are indispensable components and parts thereof, and imaging of targets is realized based on the dispersion or convergence of light. The small-sized plane lens which has the characteristics of integration, no mechanical moving part and quick zooming has important application value in the aspects of simplifying the structure of an optical system, reducing the weight, enhancing the stability, improving the intelligent level of the system and the like. Some planar lenses developed at present, such as binary optical planar lenses, fresnel liquid crystal lenses and metamaterial-based super-planar lenses, have bottleneck problems of fixed focal length, serious dispersion problem and the like, and have a large gap from practical application.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: there is bottleneck problems such as focus is fixed, dispersion problem is serious, the utility model provides a solve a novel plane lens subassembly that zooms of above-mentioned problem, based on the liquid crystal lens and the super lens combination that cascade set up, make the plane lens group have automatically controlled function of zooming, insensitive to the polarization, realize high-quality imaging effect simultaneously, promote the practical application of plane lens technique.

The utility model discloses a following technical scheme realizes:

a novel zoom plane lens component comprises a first liquid crystal lens, a second liquid crystal lens and a plane lens which are sequentially arranged, wherein the mirror surfaces of the first liquid crystal lens, the second liquid crystal lens and the plane lens are parallel to each other; the first liquid crystal lens and the second liquid crystal lens are electric control zoom lenses; the first liquid crystal lens comprises a first liquid crystal layer, the second liquid crystal lens comprises a second liquid crystal layer, under the state of no electric field, the arrangement direction of molecules in the first liquid crystal layer is parallel to the integral mirror surface direction of the first liquid crystal lens, the arrangement direction of molecules in the second liquid crystal layer is parallel to the integral mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the second liquid crystal layer are mutually vertical; the molecular arrangement states of the first liquid crystal layer and the second liquid crystal layer are adjusted by applying electric fields to the first liquid crystal layer and the second liquid crystal layer respectively and regulating and controlling the electric field intensity; the planar lens is a focal length fixed lens and adopts a super lens.

Further, the first liquid crystal lens and the second liquid crystal lens are identical in structure; the first liquid crystal lens comprises a first glass substrate and a second glass substrate, wherein a first conductive film layer and a second conductive film layer are correspondingly arranged on the opposite surfaces of the first glass substrate and the second glass substrate respectively; the opposite film surfaces of the first conductive film layer and the second conductive film layer are respectively and correspondingly provided with a first orientation layer and a second orientation layer; the orientation direction of the first orientation layer is parallel to the first glass substrate, the orientation direction of the second orientation layer is parallel to the second glass substrate, and the orientation directions of the first orientation layer and the second orientation layer are anti-parallel to each other; a first liquid crystal layer is filled between the first alignment layer and the second alignment layer; the second liquid crystal lens comprises a third glass substrate and a fourth glass substrate, and a third conductive film layer and a fourth conductive film layer are correspondingly arranged on the opposite surfaces of the third glass substrate and the fourth glass substrate respectively; the opposite film surfaces of the third conductive film layer and the fourth conductive film layer are respectively and correspondingly provided with a third orientation layer and a fourth orientation layer; the orientation direction of the third orientation layer is parallel to the third glass substrate, the orientation direction of the fourth orientation layer is parallel to the fourth glass substrate, and the orientation directions of the third orientation layer and the fourth orientation layer are anti-parallel to each other; a second liquid crystal layer is filled between the third alignment layer and the fourth alignment layer; the orientation directions of the third orientation layer and the fourth orientation layer are vertical to the orientation directions of the first orientation layer and the second orientation layer.

The first liquid crystal layer between the first orientation layer and the second orientation layer is in a nematic phase state (only direction sequence and no position sequence) in a working temperature range, and liquid crystal molecules are arranged in an antiparallel manner under the action of the first orientation layer and the second orientation layer; applying a group of electric fields with set amplitude values by utilizing the group of independent electrodes of the first conductive film layer and the common electrode of the second conductive film layer, and after the stable state is reached, orderly arranging liquid crystal molecules in the first liquid crystal layer according to a pre-designed pattern to realize the optical lens with the light converging or diverging effect; by adjusting the alternating current electric field applied to the first conductive film layer and the second conductive film layer, the molecular orientation in the first liquid crystal layer is rearranged as desired, thereby achieving the purpose of adjusting the focal length of the first liquid crystal lens. And the purpose of the focal length of the second liquid crystal lens is realized in the same way.

Further, the second glass substrate and the third glass substrate are connected through a cementing layer to realize the connection of the first liquid crystal lens and the second liquid crystal lens; or the second glass substrate and the third glass substrate share one glass substrate to realize the connection of the first liquid crystal lens and the second liquid crystal lens.

Further, the super lens comprises a glass substrate and a micro-nano structure layer arranged on the surface of the glass substrate; the glass substrate adopts an independent fifth glass substrate, or adopts the first glass substrate, or adopts the fourth glass substrate; the micro-nano structure layer is formed by distributing a plurality of micro-nano column arrays.

The micro-nano structure layer corrects the chromatic dispersion of the first liquid crystal lens and the second lens in a working waveband through accurately regulating and controlling the intensity, the phase and the polarization state of a light field, eliminates or reduces the influence of chromatic dispersion on broadband imaging, realizes perfect focusing of light rays and obtains high-quality imaging; the structure size of the micro-nano array is matched with the effective size of the first liquid crystal lens.

Further, a first spacer is arranged between the first alignment layer and the second alignment layer and used for controlling the distance between the first alignment layer and the second alignment layer; and a second spacer is arranged between the third alignment layer and the fourth alignment layer and used for controlling the distance between the third alignment layer and the fourth alignment layer.

Furthermore, the first conductive film layer and the second conductive film layer are transparent conductive films, the square resistance is 200 omega/□ -500 omega/□, and the transmittance of the film layers is not lower than 95%.

Furthermore, the first conductive film layer adopts a plurality of independent concentric annular conductive structures, each annular conductive structure leads out an independent electrode to the edge area to form a group of independent electrodes, and the outermost edge of the annular conductive structure forms the effective area of the first liquid crystal lens; the second conductive film layer is a uniform common electrode; the third conductive film layer adopts a plurality of independent concentric annular conductive structures, each annular conductive structure leads out an independent electrode to the edge area to form a group of independent electrodes, and the outermost edge of the annular conductive structure forms the effective area of the first liquid crystal lens; the fourth conductive film layer is a uniform common electrode.

Further, an electric field with a set threshold value is applied to the first conductive film layer and the second conductive film layer along the direction vertical to the first glass substrate and the second glass substrate, molecules in the first liquid crystal layer deflect or incline from the direction parallel to the first glass substrate and the second glass substrate to the direction vertical to the electric field, and therefore the light converging or diverging effect and the focal length adjustment are achieved; and applying an electric field with a set threshold value on the third conductive film layer and the fourth conductive film layer along the direction vertical to the third glass substrate and the fourth glass substrate, wherein molecules in the second liquid crystal layer deflect or incline from the direction parallel to the third glass substrate and the fourth glass substrate to the direction vertical to the electric field, so that the light converging or diverging effect and the focal length adjustment are realized.

Further, the first alignment layer and the second alignment layer are respectively coated on the corresponding first conductive film layer and the second conductive film layer by a polyimide solution, and a channel is generated for alignment in a flannelette rubbing mode after high-temperature baking; and the third alignment layer and the fourth alignment layer are respectively coated on the corresponding third conductive film layer and the fourth conductive film layer by polyimide solution, and a channel is generated for alignment in a flannelette rubbing mode after high-temperature baking.

Further, the first orientation layer and the second orientation layer are both irradiated by a photo-oriented agent through linearly polarized ultraviolet light, and orientation is realized in a photo-cracking, photo-polymerization or photo-deformation mode.

The utility model discloses have following advantage and beneficial effect:

the single liquid crystal lens needs to be combined with a polaroid, the polarizing direction of the polaroid is parallel to the orientation direction of liquid crystal molecules, so that the e light is subjected to phase delay adjustment to achieve the aim of zooming, and the adjustment range of the focal length is limited by the birefringence difference delta n ═ n of a liquid crystal material_e-n_o. Single liquid crystal lens is sensitive to polarized light, nevertheless adopts the utility model discloses a liquid crystal lens combination form can eliminate the dependence of liquid crystal to polarization, and its principle is: in the two liquid crystal layers, the orientations of liquid crystal molecules are mutually vertical, incident light in any polarization state can be regarded as superposition of light in two polarization states which are mutually vertical, in the first liquid crystal lens, e light is focused, and o light is not influenced; in the second liquid crystal lens, the original o light becomes e light and is focused by the lens, and the original e light becomes o light and is not affected by the second liquid crystal lens. Thus, the incident light of any polarization state can be focused after being combined by the two liquid crystal lenses, so that the dependence on the polarization state is eliminated.

For optical imaging lenses, zoom power and focusing effect are two important power characterizing factors, both of which are very important for practical imaging applications. At present, there are several schemes for implementing the zoom function of the superlens, such as using electrical, thermal, optical, magnetic, mechanical stretching, MEMS technology, etc., but the implementation is relatively complex. The utility model discloses in, the mode that adopts two liquid crystal lens and the super lens combination of nanometer can realize the focusing or the divergence of lens group to arbitrary light polarization state. In addition, due to the dispersion effect of the liquid crystal material, the liquid crystal lens can only work at a specific wavelength generally, when the liquid crystal lens is used in a wide waveband, the optical focuses of different wavelengths are inconsistent, and the micro-nano optical harmonic oscillators and the arrangement mode thereof of the super lens can be reasonably designed according to the dispersion characteristic (specifically, a dispersion curve in an expected working waveband) of the liquid crystal lens by adopting a super surface technology based on dispersion control, so that the combined planar lens can realize an achromatic focusing effect on a continuous wide waveband and has zooming capability.

In the existing liquid crystal lens preparation technology, a corrosion thinning process is adopted, and the thickness of a single liquid crystal lens can be controlled to be 0.2 mm-0.3 mm. Therefore, the thickness of the combined lens (two liquid crystal lenses plus a superlens) can be controlled within 1 mm. The utility model discloses be applied to the optical imaging detection field, can have extensive application prospect in fields such as machine vision and artificial intelligence. The comprehensive advantages are as follows:

1. the utility model obtains the high imaging quality plane lens with the electric control non-mechanical zooming function through the advantage complementation of the cascade of the two layers of liquid crystal lenses and the super lens;

2. the plane lens group of the utility model is insensitive to polarization, so that the plane lens group does not work in a special polarization state, thereby realizing imaging of natural light, having high utilization rate of system light energy and being beneficial to realizing imaging of dark scenes;

3. the utility model discloses a thickness of millimeter and micron order can be accomplished to automatically controlled zoom plane lens, can partly replace present traditional optical lens even totally, simplifies current formation of image and beam control system's structure greatly, improves the system integration degree to reinforcing stability is higher.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural view of an electrically controlled zoom planar imaging lens according to the present invention; reference numbers and corresponding part names in fig. 1: 101-a first glass substrate, 102-a second glass substrate, 103-a third glass substrate, 104-a fourth glass substrate, 105-a fifth glass substrate, 106-a first conductive film layer, 107-a second conductive film layer, 108-a third conductive film layer, 109-a fourth conductive film layer, 110-a first orientation layer, 111-a second orientation layer, 112-a third orientation layer, 113-a third orientation layer, 114-a first spacer, 115-a second spacer, 116-a first liquid crystal layer, 117-a second liquid crystal layer, 118-a micro-nano structure layer, 119-a first glue layer, 120-a second glue layer.

Fig. 2 is a schematic structural view of a thin electronic control zoom planar imaging lens according to the present invention; reference numbers and corresponding part names in fig. 2: 201-a first glass substrate, 202-a second glass substrate, 203-a third glass substrate, 204-a first conductive film layer, 205-a second conductive film layer, 206-a third conductive film layer, 207-a fourth conductive film layer, 208-a first orientation layer, 209-a second orientation layer, 210-a third orientation layer, 211-a third orientation layer, 212-a first spacer, 213-a second spacer, 214-a first liquid crystal layer, 215-a second liquid crystal layer, 216-a micro-nano structure layer.

FIG. 3 is a schematic diagram of the structure of the independent electrodes of the liquid crystal lens; reference numbers and corresponding part names in fig. 3: 301-glass substrate, 302-ring electrode, 303-conductive lead, 304-electrode terminal.

Fig. 4 is a schematic structural view of a fixed focal length planar lens according to the present invention; reference numbers and corresponding part names in fig. 4: 401-glass substrate, 402-micro nano structure layer.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

The present embodiment provides a novel variable focal plane lens assembly, as shown in fig. 1, comprising 5 glass substrates (a first glass substrate 101, a second glass substrate 102, a third glass substrate 103, a fourth glass substrate 104 and a fifth glass substrate 105), 4 transparent conductive layers (a first conductive film layer 106, a second conductive film layer 107, a third conductive film layer 108 and a fourth conductive film layer 109), 4 alignment layers (a first alignment layer 110, a second alignment layer 111, a third alignment layer 112 and a fourth alignment layer 113), a cell thickness control spacer (a first spacer 114 and a second spacer 115), a liquid crystal layer (a first liquid crystal layer 116 and a second liquid crystal layer 117), a micro-nano structure layer (a micro-nano structure layer 118) and a glue layer (a first glue layer 119 and a second glue layer 120).

The first glass substrate 101, the second glass substrate 102, the first conductive film layer 106, the second conductive film layer 107, the first alignment layer 110, the second alignment layer 111, the first spacer 114 and the first liquid crystal layer 116 form a first liquid crystal lens; the third glass substrate 103, the fourth glass substrate 104, the third conductive film layer 108, the fourth conductive film layer 109, the third alignment layer 112, the fourth alignment layer 113, the second spacer 115, and the second liquid crystal layer 117 constitute a second liquid crystal lens; the fifth glass substrate 105 and the micro-nano structure layer 118 form a super lens. First liquid crystal lens, second liquid crystal lens are automatically controlled zoom lens, and super lens are fixed focus lens, and first liquid crystal lens and second liquid crystal lens pass through bonding of first cementing layer 119, second liquid crystal lens and super lens and pass through cementing layer 120 bonding and finally constitute the utility model discloses an automatically controlled plane formation of image lens subassembly that zooms.

The first glass substrate 101 and the second glass substrate 102 are parallel to each other, the orientation directions of the first orientation layer 110 and the second orientation layer 111 are parallel to the first glass substrate 101 and the second glass substrate 102, and the orientation directions of the first orientation layer 110 and the second orientation layer 111 are anti-parallel to each other. The third glass substrate 103 and the fourth glass substrate 104 are parallel to each other, the orientation directions of the third orientation layer 112 and the fourth orientation layer 113 are parallel to the third glass substrate 103 and the fourth glass substrate 104, and the orientation directions of the third orientation layer 112 and the fourth orientation layer 113 are anti-parallel to each other. But the alignment directions of the third and fourth alignment layers 112 and 113 are perpendicular to the alignment directions of the first and second alignment layers 110 and 111. Under this kind of setting, the liquid crystal molecule arrangement in first liquid crystal layer 116 and the second liquid crystal layer 117 is mutually perpendicular also when no external electric field to all arrange along the direction that is on a parallel with four glass substrates (first glass substrate 101, second glass substrate 102, third glass substrate 103, fourth glass substrate 104), thereby eliminate the utility model discloses the polarization sensitivity of device for the same kind is to polarization sensitive liquid crystal lens, not only can simplify the device structure, when imaging to the natural light simultaneously, has improved the light energy utilization ratio greatly to be favorable to using the not good occasion of illumination condition.

The micro-nano structure layer 118 is prepared on the independent fifth glass substrate 105, and through accurately regulating and controlling the intensity, the phase and the polarization state of a light field, the dispersion effect of the liquid crystal layer on light is corrected in a working waveband, so that the influence of dispersion on broadband imaging is eliminated or reduced, perfect focusing on light is realized, and high-quality imaging is obtained. In addition to the adhesion effect, the refractive indexes of the first and second glue layers 119 and 120 are matched to the refractive indexes of the four glass substrates (the first glass substrate 101, the second glass substrate 102, the third glass substrate 103, and the fourth glass substrate 104), thereby reducing reflection loss of light between the first and second glass substrates 101 and 102, and the third and fourth glass substrates 103 and 104.

An electric field perpendicular to the direction of the first glass substrate 101 and the second glass substrate 102 is applied to the transparent first conductive film layer 106 and the second conductive film layer 107 and exceeds a set threshold, an electric field perpendicular to the direction of the third glass substrate 103 and the fourth glass substrate 104 is applied to the transparent third conductive film layer 108 and the fourth conductive film layer 109 and exceeds a set threshold, and then molecules in the first liquid crystal layer 116 and the second liquid crystal layer 117 are deflected or inclined from the direction parallel to the glass substrates (the first glass substrate 101, the second glass substrate 102, the third glass substrate 103, the fourth glass substrate 104 and the fifth glass substrate 105) to the direction perpendicular to the electric field, so that the optical retardation of the first liquid crystal layer 116 and the second liquid crystal layer 117 to incident light is changed, and the focal length of the planar lens set of the present invention is adjusted.

Example 2

The present embodiment provides a novel variable focal length planar lens assembly, as shown in fig. 2, comprising three glass substrates (a first glass substrate 201, a second glass substrate 202 and a third glass substrate 203), four transparent conductive layers (a first conductive film layer 204, a second conductive film layer 205, a third conductive film layer 206 and a fourth conductive film layer 207), four alignment layers (a first alignment layer 208, a second alignment layer 209, a third alignment layer 210 and a fourth alignment layer 211), two cell thickness control spacers (a first spacer 212 and a second spacer 213), two liquid crystal layers (a first liquid crystal layer 214 and a second liquid crystal layer 215) and one micro-nano structure layer (a micro-nano structure layer 216). The structure is similar to the electrically controlled zoom plane lens structure provided in embodiment 1, except that: in order to reduce the thickness of the lens device, when the lens group is manufactured, the first liquid crystal lens and the second liquid crystal lens share one glass substrate (the second glass substrate 202), the second liquid crystal lens and the superlens share one glass substrate (the third glass substrate 203), and the original second glass substrate 102 and the original third glass substrate 103, and the original fourth glass substrate 104 and the original fifth glass substrate 105 are correspondingly eliminated; the two groups of glass substrates, the second glass substrate 102 and the third glass substrate 103, and the fourth glass substrate 104 and the fifth glass substrate 105, which were originally separated by the glue layers (the first glue layer 119 and the second glue layer 120), were combined into one glass substrate, and the glue layers (the first glue layer 119 and the second glue layer 120) were omitted. The thin structure not only reduces the thickness of the lens group, but also reduces the reflection loss and the absorption loss of light, thereby being more beneficial to improving the light energy utilization rate of the lens group.

Example 3

Based on further improvement of the embodiments 1 and 2, the independent electrode structure of the liquid crystal lens is shown in fig. 3, and comprises a glass substrate 301 (the glass substrate refers to the first glass substrate 101 and the third glass substrate 103 for the embodiment 1); referring to the first glass substrate 201 and the second glass substrate 202 side plate surfaces for embodiment 2), a plurality of concentric diffraction ring electrodes 302 for independent retardation control, electrode terminals 304 for connecting a driving circuit, and transparent conductive leads 303 connecting the independent ring electrodes 302 with the electrode terminals 304. The width of the ring-shaped electrode 302 is designed comprehensively according to the design focal length of the liquid crystal lens, the thickness of the liquid crystal layer, the birefringence difference and other parameters. The transparent conductive leads 303 are as thin as possible on the premise of ensuring good conductive performance, each annular electrode 302 is independently led out to the edge area from the transparent conductive lead 303 to form a group of independent electrodes, and the outermost edge of the annular electrode 302 forms the effective area of the first liquid crystal lens. The plurality of regions of the ring electrode 302 are individually controlled according to the phase modulation fresnel lens principle, thereby simulating the focusing or defocusing function of a general optical glass lens on light to form a so-called liquid crystal lens. Correspondingly, the conductive film layers on the second glass substrate 102, the fourth glass substrate 104, the other side plate surface of the second glass substrate 202 and the third glass substrate 203 are matched with the independent electrodes by adopting a uniform common electrode. The square resistance of the transparent conductive film is 200 omega/□ -500 omega/□, and the transmittance of the film layer is not lower than 95%.

The planar lens structure with a fixed focal length is shown in fig. 4, and includes a glass substrate 401 (here, the glass substrate refers to a fifth glass substrate 105 for example 1 and a third glass substrate 203 for example 2) and a micro-nano structure layer 402. The micro-nano structure layer 402 precisely adjusts and controls the intensity, phase and polarization state of incident light by adopting micro-nano columns with different shapes and lengths, compensates the chromatic dispersion of the first liquid crystal lens and the second liquid crystal lens to light, and realizes perfect focusing of a wide waveband, so that a variable-focus planar lens group with good imaging quality is formed.

For each alignment layer (for the first alignment layer 110, the second alignment layer 111, the third alignment layer 112, and the fourth alignment layer 113 of example 1, for the first alignment layer 208, the second alignment layer 209, the third alignment layer 210, and the fourth alignment layer 211 of example 2), a polyimide solution may be applied onto the corresponding transparent conductive layer by roll coating or spin coating, and after baking at a high temperature, a channel is created by rubbing with a flannelette for alignment. Alternatively, the photo-alignment agent can be used to achieve alignment by irradiation with linearly polarized ultraviolet light, photo-cleavage, photo-polymerization or photo-deformation.

The first liquid crystal layer between the first alignment layer and the second alignment layer is in a nematic phase state (only direction order and no position order) in a working temperature range, and is arranged in an antiparallel manner under the action of the first alignment layer and the second alignment layer; applying a group of electric fields with set amplitude values by utilizing the group of independent electrodes of the first conductive film layer and the common electrode of the second conductive film layer, and after the stable state is reached, orderly arranging liquid crystal molecules in the first liquid crystal layer according to a pre-designed pattern to realize the optical lens with the light converging or diverging effect; by adjusting the alternating current electric field applied to the first conductive film layer and the second conductive film layer, the molecular orientation in the first liquid crystal layer is rearranged as desired, thereby achieving the purpose of adjusting the focal length of the first liquid crystal lens. And the purpose of the focal length of the second liquid crystal lens is realized in the same way.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A novel zoom plane lens component is characterized by comprising a first liquid crystal lens, a second liquid crystal lens and a plane lens which are sequentially arranged, wherein the mirror surfaces of the first liquid crystal lens, the second liquid crystal lens and the plane lens are parallel to each other;

the first liquid crystal lens and the second liquid crystal lens are electric control zoom lenses; the first liquid crystal lens comprises a first liquid crystal layer, the second liquid crystal lens comprises a second liquid crystal layer, under the state of no electric field, the arrangement direction of molecules in the first liquid crystal layer is parallel to the integral mirror surface direction of the first liquid crystal lens, the arrangement direction of molecules in the second liquid crystal layer is parallel to the integral mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the second liquid crystal layer are mutually vertical; the molecular arrangement states of the first liquid crystal layer and the second liquid crystal layer are adjusted by applying electric fields to the first liquid crystal layer and the second liquid crystal layer respectively and regulating and controlling the electric field intensity;

the planar lens is a focal length fixed lens and adopts a super lens.

2. A novel variable focus planar lens package according to claim 1, wherein said first liquid crystal lens and said second liquid crystal lens are identical in construction; the first liquid crystal lens comprises a first glass substrate and a second glass substrate, wherein a first conductive film layer and a second conductive film layer are correspondingly arranged on the opposite surfaces of the first glass substrate and the second glass substrate respectively; the opposite film surfaces of the first conductive film layer and the second conductive film layer are respectively and correspondingly provided with a first orientation layer and a second orientation layer; the orientation direction of the first orientation layer is parallel to the first glass substrate, the orientation direction of the second orientation layer is parallel to the second glass substrate, and the orientation directions of the first orientation layer and the second orientation layer are anti-parallel to each other; a first liquid crystal layer is filled between the first alignment layer and the second alignment layer;

the second liquid crystal lens comprises a third glass substrate and a fourth glass substrate, and a third conductive film layer and a fourth conductive film layer are correspondingly arranged on the opposite surfaces of the third glass substrate and the fourth glass substrate respectively; the opposite film surfaces of the third conductive film layer and the fourth conductive film layer are respectively and correspondingly provided with a third orientation layer and a fourth orientation layer; the orientation direction of the third orientation layer is parallel to the third glass substrate, the orientation direction of the fourth orientation layer is parallel to the fourth glass substrate, and the orientation directions of the third orientation layer and the fourth orientation layer are anti-parallel to each other; a second liquid crystal layer is filled between the third alignment layer and the fourth alignment layer;

the orientation directions of the third orientation layer and the fourth orientation layer are vertical to the orientation directions of the first orientation layer and the second orientation layer.

3. The novel variable focus planar lens package of claim 2, wherein said second glass substrate is connected to said third glass substrate by a glue layer to connect said first liquid crystal lens to said second liquid crystal lens; or the second glass substrate and the third glass substrate share one glass substrate to realize the connection of the first liquid crystal lens and the second liquid crystal lens.

4. The novel variable focus planar lens package of claim 2 or 3, wherein said superlens comprises a glass substrate and a micro-nano structure layer disposed on the surface of the glass substrate; the glass substrate adopts an independent fifth glass substrate, or adopts the first glass substrate, or adopts the fourth glass substrate; the micro-nano structure layer is formed by distributing a plurality of micro-nano column arrays.

5. A novel variable focus planar lens package according to claim 2, wherein a first spacer is further provided between said first alignment layer and said second alignment layer, said first spacer being adapted to control the spacing between said first alignment layer and said second alignment layer; and a second spacer is arranged between the third alignment layer and the fourth alignment layer and used for controlling the distance between the third alignment layer and the fourth alignment layer.

6. A novel variable focus planar lens package according to claim 2, wherein said first conductive film and said second conductive film are transparent conductive films, and have a sheet resistance of 200 Ω/□ -500 Ω/□, and a film transmittance of not less than 95%.

7. The novel variable focus planar lens package of claim 6, wherein said first conductive film layer comprises a plurality of independent concentric annular conductive structures, each annular conductive structure leading an independent electrode to an edge region to form a group of independent electrodes, and the outermost edge of said annular conductive structure forms an active region of said first liquid crystal lens; the second conductive film layer is a uniform common electrode; the third conductive film layer adopts a plurality of independent concentric annular conductive structures, each annular conductive structure leads out an independent electrode to the edge area to form a group of independent electrodes, and the outermost edge of the annular conductive structure forms the effective area of the first liquid crystal lens; the fourth conductive film layer is a uniform common electrode.

8. The novel variable focus planar lens assembly of claim 2 or 7, wherein a threshold electric field is applied to the first conductive film layer and the second conductive film layer in a direction perpendicular to the first glass substrate and the second glass substrate, and molecules in the first liquid crystal layer are deflected or tilted from a direction parallel to the first glass substrate and the second glass substrate to a direction perpendicular to the electric field, so as to achieve light converging or diverging effect and focal length adjustment;

and applying an electric field with a set threshold value on the third conductive film layer and the fourth conductive film layer along the direction vertical to the third glass substrate and the fourth glass substrate, wherein molecules in the second liquid crystal layer deflect or incline from the direction parallel to the third glass substrate and the fourth glass substrate to the direction vertical to the electric field, so that the light converging or diverging effect and the focal length adjustment are realized.

9. The novel variable focus planar lens package of claim 2, wherein said first and second alignment layers are each coated with a polyimide solution onto the corresponding first and second conductive film layers, and after high temperature baking, a channel is created by rubbing with a flannelette for alignment; and the third alignment layer and the fourth alignment layer are respectively coated on the corresponding third conductive film layer and the fourth conductive film layer by polyimide solution, and a channel is generated for alignment in a flannelette rubbing mode after high-temperature baking.

10. A novel variable focus planar lens package according to claim 2, wherein said first alignment layer and said second alignment layer are each oriented by photo-alignment agent by irradiation of linearly polarized uv light, by photo-cleavage, photo-polymerization or photo-deformation.

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