阅读说明：本技术 离轴聚焦透镜及其制作方法 (Off-axis focusing lens and manufacturing method thereof ) 是由 叶华朋 侯洋 袁冬 周国富 于 2021-02-05 设计创作，主要内容包括：本申请公开了一种离轴聚焦透镜的制作方法,包括：在第一透明基板的表面设置第一取向层以形成第一透镜组件,在第二透明基板的表面设置第二取向层以形成第二透镜组件；在所述第一透镜组件设有所述第一取向层的一侧设置间隔件；通过间隔件固定所述第一透镜组件、所述第二透镜组件的相对位置以形成液晶盒,所述第一透镜组件、所述第二透镜组件之间设有空隙层；对所述第一取向层、所述第二取向层进行第一阶段取向处理、第二阶段取向处理；对所述空隙层进行液晶填充处理,以形成液晶层。该制作方法可以制作精细化的光器件,以满足具有高集成度需求的光学系统。(The application discloses a method for manufacturing an off-axis focusing lens, which comprises the following steps: arranging a first orientation layer on the surface of a first transparent substrate to form a first lens assembly, and arranging a second orientation layer on the surface of a second transparent substrate to form a second lens assembly; providing a spacer on a side of the first lens assembly on which the first alignment layer is provided; fixing the relative positions of the first lens component and the second lens component through a spacer to form a liquid crystal box, wherein a gap layer is arranged between the first lens component and the second lens component; performing first-stage orientation treatment and second-stage orientation treatment on the first orientation layer and the second orientation layer; and performing liquid crystal filling treatment on the gap layer to form a liquid crystal layer. The manufacturing method can manufacture a refined optical device so as to meet the optical system with high integration requirement.)

1. The method for manufacturing the off-axis focusing lens is characterized by comprising the following steps:

arranging a first orientation layer on the surface of a first transparent substrate to form a first lens assembly, and arranging a second orientation layer on the surface of a second transparent substrate to form a second lens assembly;

providing a spacer on a side of the first lens assembly on which the first alignment layer is provided;

fixing the relative positions of the first lens component and the second lens component through the spacer to form a liquid crystal box, wherein a gap layer is arranged between the first lens component and the second lens component;

performing first-stage orientation treatment and second-stage orientation treatment on the first orientation layer and the second orientation layer;

performing liquid crystal filling treatment on the void layer to form a liquid crystal layer;

wherein the liquid crystal layer comprises at least two first phase alignment regions, at least two second phase alignment regions;

two adjacent first phase orientation regions are arranged at intervals by taking one second phase orientation region as an interval; two adjacent second phase orientation regions are arranged at intervals by taking one first phase orientation region as an interval.

2. The method of claim 1, wherein the first and second phase orientation zones are annular zones and have the same center.

3. The method of claim 2, wherein the first phase orientation zone has a corresponding phase of 0 and the second phase orientation zone has a corresponding phase of pi.

4. The method of claim 2, wherein the liquid crystal molecular alignment directions in the first phase alignment region and the second phase alignment region are perpendicular to each other.

5. The method of claim 3, wherein the performing a first stage orientation process and a second stage orientation process on the first orientation layer and the second orientation layer further comprises:

acquiring a phase distribution diagram of a target lens;

obtaining a first phase distribution map and a second phase distribution map according to the phase distribution map;

performing first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first phase distribution diagram to form a first phase orientation area;

and performing second-stage orientation treatment on the first orientation layer and the second orientation layer according to the second phase distribution diagram to form the second phase orientation region.

6. The method of claim 4, wherein the first phase orientation processing the first and second orientation layers according to the first phase profile to form the first phase orientation region comprises:

adjusting the state of a micromirror unit in the digital micromirror array according to the first phase distribution map to form a first phase micromirror array;

irradiating the first phase micro-mirror array through a light source to obtain first phase image light;

carrying out polarization modulation on the first phase image light to obtain first polarization image light;

and performing first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first polarized image light to form the first phase orientation area.

7. The method of claim 5, wherein the second phase orientation of the first and second orientation layers according to the second phase distribution map to form the second phase orientation region comprises:

adjusting the state of a micromirror unit in the digital micromirror array according to the second phase distribution map to form a second phase micromirror array;

irradiating the second phase micro mirror array through a light source to obtain second phase image light;

carrying out polarization modulation on the second phase image light to obtain second polarization image light;

and performing second-stage orientation treatment on the first orientation layer and the second orientation layer according to the second polarized image light to form the second phase orientation area.

8. The method of claim 6, wherein disposing a first alignment layer on a surface of a first transparent substrate to form a first lens assembly and disposing a second alignment layer on a surface of a second transparent substrate to form a second lens assembly comprises:

coating an orientation agent on the surface of the first transparent substrate, and carrying out heating treatment on the first transparent substrate coated with the orientation agent so as to form a first orientation layer on the surface of the first transparent substrate;

and/or (c) and/or,

and coating an orientation agent on the surface of the second transparent substrate, and performing heating treatment on the second transparent substrate coated with the orientation agent to form the second orientation layer on the surface of the second transparent substrate.

9. An off-axis focusing lens manufactured by the method of any one of claims 1 to 8.

Technical Field

The present disclosure relates to liquid crystal devices and liquid crystal lenses, and more particularly to an off-axis focusing lens and a method for fabricating the same.

Background

Conventional lenses, while still dominant in optical systems, are generally bulky and expensive. And the thickness dimension of the conventional lens is limited by the processing technology of the conventional lens, such as molding, polishing and diamond grinding.

However, as the development of optical systems requires more miniaturization of the size of optical devices, the optical systems have higher requirements on the integration of the systems, and the conventional lenses have gradually failed to meet the requirements of optical devices with high integration.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a manufacturing method of the off-axis focusing lens. The application provides a manufacturing method of the off-axis focusing lens, so that the refined off-axis focusing lens is manufactured, and an optical system meeting the requirement of high integration level is manufactured.

A first aspect of an embodiment of the present application provides a method for manufacturing an off-axis focusing lens, including:

arranging a first orientation layer on the surface of a first transparent substrate to form a first lens assembly, and arranging a second orientation layer on the surface of a second transparent substrate to form a second lens assembly;

providing a spacer on a side of the first lens assembly on which the first alignment layer is provided;

fixing the relative positions of the first lens component and the second lens component through the spacer to form a liquid crystal box, wherein a gap layer is arranged between the first lens component and the second lens component;

performing first-stage orientation treatment and second-stage orientation treatment on the first orientation layer and the second orientation layer;

performing liquid crystal filling treatment on the void layer to form a liquid crystal layer;

wherein the liquid crystal layer comprises at least two first phase alignment regions, at least two second phase alignment regions; two adjacent first phase orientation regions are arranged at intervals by taking one second phase orientation region as an interval; two adjacent second phase orientation regions are arranged at intervals by taking one first phase orientation region as an interval.

The method for manufacturing the off-axis focusing lens according to the embodiment of the application has at least the following beneficial effects: and patterning and aligning the first alignment layer and the second alignment layer, and filling liquid crystal in the gap layer to form a liquid crystal layer with alignment patterns. It can be understood that the off-axis focusing lens with the preset light modulation effect is manufactured by the manufacturing method, so that the processing cost is reduced, the manufacturing period is shortened, and the manufacturing process is simplified. In addition, the off-axis focusing lens manufactured by the manufacturing method is a liquid crystal lens, so that the size of an optical device can be effectively reduced, and an optical system with high integration requirement can be met.

In some embodiments, the first phase orientation region and the second phase orientation region are annular regions, and the first phase orientation region and the second phase orientation region have the same center.

In some embodiments, the corresponding phase of the first phase-oriented region is 0 and the corresponding phase of the second phase-oriented region is pi.

In some embodiments, the liquid crystal molecular alignment directions in the first phase alignment region and the second phase alignment region are perpendicular to each other.

In some embodiments, the performing a first stage orientation process and a second stage orientation process on the first orientation layer and the second orientation layer further includes: acquiring a phase distribution diagram of a target lens; obtaining a first phase distribution map and a second phase distribution map according to the phase distribution map; performing first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first phase distribution diagram to form a first phase orientation area; and performing second-stage orientation treatment on the first orientation layer and the second orientation layer according to the second phase distribution diagram to form the second phase orientation region.

In some embodiments, the performing a first-stage alignment process on the first alignment layer and the second alignment layer according to the first phase distribution map to form the first phase alignment region includes: adjusting the state of a micromirror unit in the digital micromirror array according to the first phase distribution map to form a first phase micromirror array; irradiating the first phase micro-mirror array through a light source to obtain first phase image light; carrying out polarization modulation on the first phase image light to obtain first polarization image light; and performing first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first phase image light to form the first phase orientation region.

In some embodiments, the performing a second-stage orientation process on the first orientation layer and the second orientation layer according to the second phase distribution map to form the second phase orientation region includes: adjusting the state of a micromirror unit in the digital micromirror array according to the second phase distribution map to form a second phase micromirror array; irradiating the second phase micro mirror array through a light source to obtain second phase image light; carrying out polarization modulation on the second phase image light to obtain second polarization image light; and performing second-stage orientation treatment on the first orientation layer and the second orientation layer according to the second phase image light to form the second phase orientation region.

In some embodiments, the disposing a first alignment layer on a surface of a first transparent substrate to form a first lens assembly and disposing a second alignment layer on a surface of the first transparent substrate to form a second lens assembly includes: coating an orientation agent on the surface of the first transparent substrate, and carrying out heating treatment on the first transparent substrate coated with the orientation agent so as to form a first orientation layer on the surface of the first transparent substrate; and/or coating an orientation agent on the surface of the second transparent substrate, and carrying out heating treatment on the second transparent substrate coated with the orientation agent so as to form the second orientation layer on the surface of the second transparent substrate.

A second aspect of the embodiments of the present application provides an off-axis focusing lens, which is manufactured by applying the method for manufacturing an off-axis focusing lens according to any one of the embodiments.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description.

Drawings

The present application is further described with reference to the following figures and examples, in which:

FIG. 1 is a flow chart illustrating a method for fabricating an off-axis focusing lens according to an embodiment of the present disclosure;

FIG. 2 is a block diagram of an off-axis focusing lens according to an embodiment of the present disclosure;

FIG. 3 is a flowchart illustrating a method for fabricating an off-axis focusing lens according to yet another embodiment of the present application;

FIG. 4 is a flow chart of a method for fabricating an off-axis focusing lens according to yet another embodiment of the present application;

FIG. 5 is a flow chart of a method for fabricating an off-axis focusing lens according to yet another embodiment of the present application;

FIG. 6 is a schematic view of a portion of a Fresnel zone plate according to yet another embodiment of the present application;

FIG. 7 is a schematic diagram of a phase distribution of an off-axis focusing lens according to yet another embodiment of the present application;

FIG. 8 is a schematic diagram of a liquid crystal molecule distribution of an off-axis focusing lens according to another embodiment of the present application;

FIG. 9 is a schematic diagram of a first phase orientation region of an off-axis focusing lens according to yet another embodiment of the present application;

FIG. 10 is a schematic illustration of a second phase orientation zone of an off-axis focusing lens according to yet another embodiment of the present application;

fig. 11 is a schematic view of a miniature projection exposure system according to yet another embodiment of the present application.

Reference numerals: 110. a first transparent substrate; 120. a second transparent substrate; 210. a first alignment layer; 220. a second alignment layer; 310. a liquid crystal layer; 320. a spacer.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Conventional lenses, while still dominant in optical systems, are generally bulky and expensive. And the thickness dimension of the conventional lens is limited by the processing technology of the conventional lens, such as molding, polishing and diamond grinding.

However, as optical systems are developed, the size of optical devices is required to be more miniaturized to meet the requirement of high integration of optical systems, and the conventional lens is gradually unable to meet the requirement of partial high integration of optical devices. The application provides a manufacturing method of the off-axis focusing lens to manufacture a refined optical device, so that an optical system with high integration requirement is met.

Referring to fig. 1, fig. 2, and fig. 6, an embodiment of the present invention provides a method for manufacturing an off-axis focusing lens, including: step S100, arranging a first orientation layer on the surface of a first transparent substrate to form a first lens assembly, and arranging a second orientation layer on the surface of a second transparent substrate to form a second lens assembly; step S200, arranging a spacer on one side of the first lens assembly provided with the first orientation layer; step S300, fixing the relative positions of a first lens component and a second lens component through a spacer to form a liquid crystal box, wherein a clearance layer is arranged between the first lens component and the second lens component; step S400, performing first-stage orientation treatment and second-stage orientation treatment on the first orientation layer and the second orientation layer; step S500, a liquid crystal filling process is performed on the gap layer to form a liquid crystal layer.

The first lens assembly and the second lens assembly are obtained by respectively arranging the orientation layers on the surfaces of the first transparent substrate and the second transparent substrate. And a spacer is arranged on the surface of one side of the first lens component provided with the first alignment layer, and the first lens component and the second lens component are oppositely arranged on the side provided with the alignment layer to form a liquid crystal box. The first lens assembly and the second lens assembly are bonded through the spacer to fix the relative positions of the first lens assembly and the second lens assembly.

The relative positions of the first lens component and the second lens component are fixed through the spacer, and the size of the spacer is adjusted to form a gap layer between the first lens component and the second lens component. The first orientation layer and the second orientation layer are subjected to first-stage orientation treatment and second-stage orientation treatment, so that the first orientation layer and the second orientation layer are distributed according to a preset angle. Further, the liquid crystal layer is formed by performing a liquid crystal filling process on the gap layer, and the phase distribution of the liquid crystal layer is determined by the first alignment layer and the second alignment layer. And aligning the first alignment layer and the second alignment layer according to the preset phase distribution so that the liquid crystal layer is distributed according to the preset alignment direction, thereby realizing the corresponding light beam modulation effect.

As shown in fig. 6, the off-axis focusing lens is a liquid crystal lens of a fresnel zone plate structure type having an off-axis focusing effect, for example.

The fresnel zone plate is composed of a plurality of concentric rings, and as shown in the figure, the excircle radius of each n zones is:

where λ denotes an incident wavelength, n denotes a band number, f denotes a focal length of the zone plate, and R_CDenotes the radius of the nth zone.

When a fresnel zone plate is illuminated perpendicularly with a monochromatic plane wave, the complex amplitudes of the wavelets from all zones at distance f from the zone plate will add up and form a bright spot, i.e. the focal point of the zone plate. Further, when a monochromatic plane wave is incident in a parallel light manner, the position of the focal point is on the zone plate central axis. Further, by selecting a small portion of the zone plate, the beam still travels the same path as shown. In this case, the truncated zone plate deflects the beam and focuses the beam.

Taking FIG. 6 as an example, the basic lens parameter is set to the main lens radius R_CEqual to 800 μm, intercept the center-to-center distance of the lens from the main lensWith a center Rp of 180 μm, a truncated lens radius Re of 150 μm, a focal distance f of 5000 μm, and an incident light wavelength of 532 nm. Through calculation, the obtained phase design diagram is shown in the figure, when parallel light enters the lens, a focal spot is formed by a generated light field deviating from the main optical axis by 180 mu m at the position 5000 mu m away from the lens, and the off-axis focusing effect is realized.

Referring to fig. 9 and 10, in some embodiments, the liquid crystal layer includes at least two first phase alignment regions and at least two second phase alignment regions; two adjacent first phase orientation areas take one second phase orientation area as an interval to obtain interval arrangement; two adjacent second phase orientation regions are arranged at intervals by taking one first phase orientation region as an interval.

It is understood that the phase distribution in the liquid crystal layer is periodically changed. Two adjacent first phase orientation regions correspond to the same phase; two adjacent second phase orientation regions correspond to the same phase.

Further, the deflection angle of liquid crystal molecules in the liquid crystal layer is periodically changed. The liquid crystal molecules in the plurality of first phase alignment regions have the same deflection angle, and the liquid crystal molecules in the plurality of second phase alignment regions have the same deflection angle.

As shown, in some embodiments, the first phase orientation region and the second phase orientation region are annular regions, and the first phase orientation region and the second phase orientation region have the same center.

The first phase orientation region and the second phase orientation region are concentrically distributed, and the first phase orientation region at the center can be understood as an annular region with an inner diameter equal to 0. That is, liquid crystal molecules in the liquid crystal layer are arranged in a manner that a plurality of annular regions are nested layer by layer.

In some embodiments, the corresponding phase of the first phase-oriented region is 0 and the corresponding phase of the second phase-oriented region is pi.

By setting the corresponding phase of the first phase-oriented region to 0, the corresponding phase of the second phase-oriented region is set to pi. The included angle between the liquid crystal molecules in the first phase orientation area and the first transparent substrate is 0 degree, and the included angle between the liquid crystal molecules in the second phase orientation area and the first transparent substrate is 90 degrees.

In the adjacent phase alignment regions, the liquid crystal molecules are arranged perpendicular to each other. That is, the liquid crystal molecules in the first phase alignment region and the liquid crystal molecules in the second phase alignment region are perpendicular to each other.

Referring to fig. 3, in some embodiments, the step S400 of performing the first-stage alignment process and the second-stage alignment process on the first alignment layer and the second alignment layer further includes: step S410, acquiring a phase distribution map of the target lens; step S420, obtaining a first phase distribution map and a second phase distribution map according to the phase distribution map; step S430, performing a first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first phase distribution map to form a first phase orientation area; step S440, performing a second-stage alignment process on the first alignment layer and the second alignment layer according to the second phase distribution map to form a second phase alignment region.

By taking a phase profile of the target lens; obtaining a first phase distribution map and a second phase distribution map according to the phase distribution map; performing first-stage orientation treatment on the first orientation layer and the second orientation layer according to the first phase distribution diagram to form a first phase orientation area; and performing second-stage orientation treatment on the first orientation layer and the second orientation layer according to the second phase distribution diagram to form a second phase orientation area.

Wherein the first phase profile corresponds to the phase distribution of the first phase orientation zone and the second phase profile corresponds to the phase distribution of the second phase orientation zone. The first orientation layer and the second orientation layer are subjected to graphical orientation rewriting by orienting different areas of the first orientation layer and the second orientation layer of the first phase distribution diagram and the second phase distribution diagram.

And the first orientation layer and the second orientation layer are subjected to patterned orientation rewriting, so that the filled liquid crystal layer is arranged according to a preset orientation, and liquid crystal molecules in the liquid crystal layer are arranged according to a fixed deflection direction.

Further, when there are two types of liquid crystal molecule deflection angles in a part of the liquid crystal layer and one of them is 0, the first alignment layer and the second alignment layer may be subjected to only the first-stage alignment treatment.

The following describes the alignment process of the first alignment layer and the second alignment layer by taking a micro projection exposure system with a digital controlled micromirror chip as an example. The digital micromirror array is composed of a plurality of micromirror units, and the switching states of the individual micromirror units can be controlled individually. If the single micro-mirror unit is in an open state, light can be reflected; if the individual micromirror cell is in the off state, light is not reflected.

Referring to fig. 4 and 9, in some embodiments, the step S430 of performing a first-stage alignment process on the first alignment layer and the second alignment layer according to the first phase distribution map to form a first phase alignment region includes: step S431, carrying out state adjustment on the micromirror units in the digital micromirror array according to the first phase distribution diagram to form a first phase micromirror array; step S432, irradiating the first phase micromirror array by a light source to obtain a first phase image light; step S433, performing polarization modulation on the first phase image light to obtain first polarized image light; step S434, performing a first-stage alignment process on the first alignment layer and the second alignment layer according to the first polarized image light to form a first phase alignment region. For example, the first and second alignment layers are subjected to a first-stage alignment process according to the schematic diagram of the phase alignment region shown in fig. 9 to form a first phase alignment region.

In fig. 9, a white area is an exposed area, and a black area is a non-exposed area. The exposure area is the area with the phase of 0 in the phase distribution diagram, and the non-0 phase area in the phase distribution diagram is the non-exposure area.

Referring to fig. 5 and 10, in some embodiments, the step S440 of performing a second-stage alignment process on the first alignment layer and the second alignment layer according to the second phase distribution map to form a second phase alignment region includes: step S441, carrying out state adjustment on the micromirror units in the digital micromirror array according to the second phase distribution map to form a second phase micromirror array; step S442, irradiating the second phase micro-mirror array through a light source to obtain second phase image light; step S443, performing polarization modulation on the second phase image light to obtain second polarization image light; step S444, performing a second-stage alignment process on the first alignment layer and the second alignment layer according to the second polarized image light to form a second phase alignment region. For example, the first and second alignment layers are subjected to a first-stage alignment process according to the schematic diagram of the phase alignment region shown in fig. 10 to form a first phase alignment region.

In fig. 10, a white area is an exposed area, and a black area is a non-exposed area. The exposure area is an area with a phase of pi in the phase distribution diagram, and the non-pi phase area in the phase distribution diagram is a non-exposure area.

Further, the first alignment layer and the second alignment layer are rewritten twice by rewriting manners of the first alignment layer and the second alignment layer in the above embodiments, so that the first alignment layer and the second alignment layer are aligned according to a preset alignment pattern.

Referring to fig. 7 to 11, the switching states of the micromirror units in the digital micromirror array 450 are adjusted by the processor to form a dynamic mask. The ultraviolet light source 440 emits a collimated light beam to the surface of the digital micromirror array 450 and generates a first phase image light. Wherein the first phase image light carries image information. The first phase image light is polarization-modulated by the electrically controlled polarizer 430 to obtain first polarized image light having a specific polarization state. The first polarized image light is condensed by the apochromatic field objective lens 420 to adjust the effective area of the first polarized image light. The first alignment layer and the second alignment layer in the liquid crystal cell 410 are aligned by the shrunk first polarized image light, and the first alignment layer and the second alignment layer are subjected to alignment rewriting.

For example, the first phase profile performs a first-stage alignment process on the first alignment layer and the second alignment layer to rewrite the first region of the first alignment layer and the second alignment layer, thereby forming a first-phase alignment region.

Further, the first phase image light is split by the beam splitter 470, and the split beam is detected by the CCD camera 460 to monitor the orientation pattern in real time.

For example, the second phase distribution map performs second-stage alignment processing on the first alignment layer and the second alignment layer to rewrite a second region of the first alignment layer and the second alignment layer, thereby forming a second phase alignment region.

It is understood that the first phase orientation region and the second phase orientation region are two corresponding types of regions in the first orientation layer and the second orientation layer. The alignment precision of the alignment layer is optimized by rewriting the first phase alignment region and the second phase alignment region in the first alignment layer and the second alignment layer, respectively.

In some embodiments, disposing a first alignment layer on a surface of a first transparent substrate to form a first lens assembly and disposing a second alignment layer on a surface of the first transparent substrate to form a second lens assembly comprises: coating an orientation agent on the surface of the first transparent substrate, and carrying out heating treatment on the first transparent substrate coated with the orientation agent so as to form a first orientation layer on the surface of the first transparent substrate; and/or coating an orientation agent on the surface of the second transparent substrate, and carrying out heating treatment on the second transparent substrate coated with the orientation agent so as to form a second orientation layer on the surface of the second transparent substrate.

It is understood that the alignment film (PAAD22 thin film), i.e., the alignment layer, is formed by heating the first and second transparent substrates provided with the alignment agent to volatilize the solution and retain the effective components on the first and second transparent substrates.

The following description will schematically describe the method for manufacturing the off-axis focusing lens by taking a specific application as an example.

The glass was cut to form 2.5cm by 2.5cm first and second transparent substrates. The first transparent substrate and the second transparent substrate are pretreated to remove organic impurities on the surfaces, and the hydrophilicity of the surfaces of the first transparent substrate and the second transparent substrate is enhanced.

Wherein the cleaning process comprises: and ultrasonically cleaning the first transparent substrate and the second transparent substrate for 15min by using a mixed solvent of acetone solution and alcohol, and soaking the cleaned first transparent substrate and the cleaned second transparent substrate for 15min by using deionized water. Further, the surfaces of the first transparent substrate and the second transparent substrate after the soaking treatment are cleaned by secondary ultrasonic cleaning (15 min). And baking the cleaned first transparent substrate and the second transparent substrate for 30min to fully volatilize the solution on the surfaces of the first transparent substrate and the second transparent substrate.

The dried first transparent substrate and the second transparent substrate are placed into a UV irradiation machine to be irradiated for 30min so as to clean organic impurities remained on the surface of the glass and simultaneously increase the hydrophilicity of the surface of the glass substrate.

Further, an alignment agent is applied to the surface of the first transparent substrate, and the first transparent substrate after the application of the alignment agent is subjected to a heat treatment to form a first alignment layer on the surface of the first transparent substrate.

For example, the first transparent substrate and the second transparent substrate are subjected to a blowing process with nitrogen gas to ensure that the surfaces of the first transparent substrate and the second transparent substrate are free from floating dust. Spin-coating an orientation agent on the surfaces of the first transparent substrate and the second transparent substrate at a high speed of 2000 rpm by a spin coater, placing the first transparent substrate and the second transparent substrate which are spin-coated with the orientation agent on a hot stage at 100 ℃ for heating treatment for 10min to fully volatilize the solution, and forming a first orientation layer and a second orientation layer on the surfaces of the first transparent substrate and the second transparent substrate.

The first lens assembly is provided with a UV paste (spacer) mixed with a spacer on the side where the first alignment layer is provided, and the first lens assembly and the second lens assembly are stacked. The UV paste mixed with the spacers is irradiated and cured by UV light to form the spacers. Wherein the cell thickness of the liquid crystal cell is adjusted by the diameter size of the spacer.

The embodiment of the application also provides an off-axis focusing lens which is manufactured by applying the manufacturing method of the off-axis focusing lens in any embodiment.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.