CN107797307B - Double-diopter glasses based on liquid crystal birefringence - Google Patents

Double-diopter glasses based on liquid crystal birefringence Download PDF

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Publication number
CN107797307B
CN107797307B CN201711149671.4A CN201711149671A CN107797307B CN 107797307 B CN107797307 B CN 107797307B CN 201711149671 A CN201711149671 A CN 201711149671A CN 107797307 B CN107797307 B CN 107797307B
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liquid crystal
lens
lens substrate
diopter
layer
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CN107797307A (en
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李梅英
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Shanghai Minghu Technology Co., Ltd
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Shanghai Minghu Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/08—Auxiliary lenses; Arrangements for varying focal length
    • G02C7/081—Ophthalmic lenses with variable focal length
    • G02C7/083—Electrooptic lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C1/00—Assemblies of lenses with bridges or browbars
    • G02C1/04—Bridge or browbar secured to or integral with partial rims, e.g. with partially-flexible rim for holding lens
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Health & Medical Sciences (AREA)
  • Geometry (AREA)
  • Liquid Crystal (AREA)
  • Eyeglasses (AREA)

Abstract

The invention discloses a pair of diopter glasses based on liquid crystal birefringence, which relates to the field of glasses and comprises a pair of diopter lenses for correcting vision, wherein the pair of diopter lenses comprises: the liquid crystal display comprises a first lens substrate, a second lens substrate, a plurality of support columns arranged between the first lens substrate and the second lens substrate, a liquid crystal layer filled between the first lens substrate and the second lens substrate and a liquid crystal laminating frame arranged around the liquid crystal layer; a first transparent electrode layer and a second transparent electrode layer are respectively arranged on the inner sides of the first lens substrate and the second lens substrate; the invention provides double-diopter glasses, which achieve the aim of controlling the diopter of lenses by applying voltage to electrodes, controlling the rotation of liquid crystal and switching the refractive index. The glasses provided by the invention have no interval in different areas, beautiful appearance, no prism jumping phenomenon and other problems. The glasses are used for correcting pseudomyopia, and can be switched to high-degree glasses when a user observes distant scenes and switched to low-degree glasses when a user observes close scenes, so that the vision of the user is improved.

Description

Double-diopter glasses based on liquid crystal birefringence
Technical Field
The invention relates to the field of glasses, in particular to double-diopter glasses based on liquid crystal birefringence.
Background
In the case of correcting vision, it is often desirable for a pair of glasses to have two degrees of correction. For example, the elderly or presbyopic users need to watch through presbyopic glasses (convex lenses) when they look at newspapers in close proximity, and through plano glasses when they look at distant scenes. For example, in the pseudomyopia of teenagers, glasses with two degrees are also needed, the myopia degrees are prevented from being deepened, the eyesight is corrected, and a user can adjust the degrees of the glasses by himself to meet the requirements of different scenes.
In the prior art, there is a bifocal lens, which is formed by grinding two different refractive powers on the same lens into two zones of the lens, as shown in fig. 2. The disadvantages are that: the glasses have the advantages that one lens is divided into two areas, so that the problems that different areas of the glasses are obviously spaced, the appearance is not attractive, the phenomenon of prismatic jumping exists, and dizziness can occur when people go upstairs and downstairs; meanwhile, the user needs to lift the glasses frame by hand to change the focus, and the operation is inconvenient.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a pair of diopter glasses based on liquid crystal birefringence. The adjustable dual-focus lens aims to realize the adjustment of two focal lengths of the spectacle lenses and solve the problems that in the prior art, different areas of the dual-focus lens have obvious intervals, the appearance is not attractive, the phenomenon of prismatic jumping exists and the like.
To achieve the above object, the present invention provides a pair of diopter glasses based on liquid crystal birefringence, comprising a pair of diopter lenses for correcting vision, the pair of diopter lenses comprising:
The liquid crystal display comprises a first lens substrate, a second lens substrate, a plurality of support columns arranged between the first lens substrate and the second lens substrate, a liquid crystal layer filled between the first lens substrate and the second lens substrate, and liquid crystal attaching frames arranged around the liquid crystal layer; a first transparent electrode layer and a second transparent electrode layer are respectively arranged on the inner sides of the first lens substrate and the second lens substrate; when no voltage is applied to the first transparent electrode layer and the second transparent electrode layer, the liquid crystal is in a first state; when voltage is applied to the first transparent electrode layer and the second transparent electrode layer, the liquid crystal is in a second state;
At least one interface of the two interfaces of the liquid crystal layer is of an arc-shaped structure; the double-diopter lens is used for correcting vision, and the diopter difference of the double-diopter lens between the first state and the second state
N iss1Is the refractive index of the liquid crystal layer in the first state, ns2Is the refractive index of the liquid crystal layer in the second state, ns1≠ns2And is andsaid r1Radius of curvature of main optical axis of first interface of liquid crystal layer, r2Radius of curvature of main optical axis of second interface of liquid crystal layer, r1> 0, said r2Is greater than 0; if the first interface of the liquid crystal layer is a concave surface, the alpha is-1; if the first interface of the liquid crystal layer is a plane, the alpha is 0; if the first of the liquid crystal layerThe interface is convex, then the alpha is 1; if the second interface of the liquid crystal layer is a concave surface, the beta is-1; if the second interface of the liquid crystal layer is a plane, the beta is 0; if the second interface of the liquid crystal layer is a convex surface, the beta is 1;
the height of each support column corresponds to the thickness of the liquid crystal layer at the position of the support column.
In the technical scheme, the structure and parameters of the double-diopter glasses are provided, and the purpose of controlling the diopter of the lenses is achieved by applying voltage to the electrodes, controlling the rotation of the liquid crystal and switching the refractive index. The glasses provided by the invention are of a three-layer structure, but the shapes of the glasses are similar to those of the existing glasses, and the glasses are compatible with the existing glasses frame and the habits of users. Compared with a bifocal lens, the two focal lengths of the spectacle lens can be adjusted, and the lens has no interval in different areas, beautiful appearance, no prismatic jumping phenomenon and the like. The invention is used for correcting pseudomyopia, and can ensure that a user can switch to high-degree glasses when observing distant scenes and switch to low-degree glasses when observing nearby scenes so as to improve the vision of the user. In addition, the height control of each area of the lens can be effectively improved by adopting the support columns, the liquid crystal is ensured to be proper and balanced in each area, and the liquid crystal is prevented from gathering. By passingThe lens with different double diopter difference can be effectively configured, and the lens is simple to manufacture.
Further, a distance is reserved between the liquid crystal attaching frame and the edge of the first lens substrate, a distance is reserved between the liquid crystal attaching frame and the edge of the second lens substrate, a mounting groove formed by the liquid crystal attaching frame, the first lens substrate and the second lens substrate is formed, and the mounting groove is used for mounting the double-diopter lens on a glasses frame of glasses.
In this technical scheme, leave the clearance between laminating frame and the base plate edge for install the lens on the picture frame, including installing the lens on the acting as go-between of half frame glasses. The optometrist is not required to set a groove for mounting the lens again, and the lens assembling process is simplified.
Further, a first alignment layer for pre-configuring the orientation of the liquid crystal layer is disposed on the first transparent electrode layer, and a second alignment layer for pre-configuring the orientation of the liquid crystal layer is disposed on the second transparent electrode layer; the first alignment layer and the second alignment layer are obtained by adopting optical alignment, and the liquid crystal layer adopts negative liquid crystal; when the double-diopter lens is in a first state, the negative liquid crystal is vertically arranged; when the double diopter lens is in a second state, the negative liquid crystal is arranged along the electric field.
In the technical scheme, the optical alignment and the negative liquid crystal are adopted, so that the consistency of each area of the glasses is improved, and the inconsistency caused by damage of each area of the rubbing alignment is avoided. Meanwhile, the switching of two refractive indexes of the liquid crystal is realized under an electric field.
In an embodiment, the alignment direction of the first alignment layer and the second alignment layer is along the main optical axis direction of the dual-refractive-lens.
in the technical scheme, the direction of the alignment adopts the direction along the main optical axis of the double-refraction lens, and the ultraviolet exposure device has the advantages that the ultraviolet exposure angle irradiates the substrate from the positive direction of the main optical axis, only one parallel light source is needed, the exposure efficiency is high, and the speed is high.
In an embodiment, the alignment direction of the first alignment layer and the second alignment layer is along the radial direction of the first lens substrate or the second lens substrate.
In the technical scheme, the alignment direction is along the radial direction of the substrate, and the method has the advantage of good imaging effect at each visual angle.
Further, in one embodiment of the present invention, each of the support posts has a heightD is0Thickness of liquid crystal layer in the direction of main optical axis, thetai1The included angle between the placing position of the support column and the main optical axis is shown.
In the technical scheme, the height of the support column is set, so that on one hand, a space between the first lens substrate and the second lens substrate is supported to form a liquid crystal layer, and double diopters are effectively realized; on the other hand sets for reasonable height through different positions, guarantees that the homoenergetic of each position can obtain good correction eyesight effect, guarantees that the lens is indeformable.
It should be noted that the first lens substrate and the second lens substrate may refract light, or may not affect the refraction path of light; in an embodiment of the invention, the first lens substrate, the second lens substrate and the liquid crystal layer participate in refraction of light; in order to reduce the processing procedure and the processing cost, the curvature radiuses of the two sides of the first lens base plate are equal or the curvature radiuses of the two sides of the second lens base plate are equal.
In one embodiment, the radius of curvature r of the main optical axis of the third interface of the first lens substrate3And the radius of curvature r of the principal optical axis of the fourth interface4are equal.
In one embodiment, the radius of curvature r of the main optical axis of the fifth interface of the second lens substrate5and radius of curvature r of main optical axis of sixth interface6Are equal.
Further, at least one of the first lens substrate and the second lens substrate is used for polishing, and the first diopter value of the double diopter lens in the first state is adjusted.
In the technical scheme, in order to facilitate the optometrist to finely adjust the degree number of the glasses, at least one of the first lens substrate and the second lens substrate is used for polishing, so that the preset degree number of the lenses is prevented from being unmatched with a user, the classification of factory models of the lenses is reduced, and the adaptability of the lenses is improved.
The invention has the beneficial effects that: the invention provides the structure and parameters of double-diopter glasses, and the purpose of controlling the diopter of the glasses lens is achieved by applying voltage to the electrodes, controlling the rotation of liquid crystal and switching the refractive index. Compared with a bifocal lens, the two focal lengths of the spectacle lens can be adjusted, and the lens has no interval in different areas, beautiful appearance, no prismatic jumping phenomenon and the like. The invention is used for correcting pseudomyopia, and can ensure that a user can switch to high-degree glasses when observing distant scenes and switch to low-degree glasses when observing nearby scenes so as to improve the vision of the user. In addition, the height control of each area of the lens can be effectively improved by adopting the support columns, the liquid crystal is ensured to be proper and balanced in each area, and the liquid crystal is prevented from gathering. In the invention, a gap is left between the attaching frame and the edge of the substrate, and is used for mounting the lens on the spectacle frame. The optometrist is not required to set a groove for mounting the lens again, and the lens assembling process is simplified.
Drawings
FIG. 1 is a schematic diagram of a bifocal lens construction of the prior art;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a liquid crystal alignment structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of a liquid crystal alignment structure according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a liquid crystal structure under the action of an electric field according to an embodiment of the present invention;
FIG. 6 is a schematic view of lens geometry in an embodiment of the invention;
FIG. 7 is a schematic view of the geometric parameters of a lens according to another embodiment of the present invention.
Detailed Description
the invention can realize the advantages of double-light presbyopic glasses and double-light myopia glasses, smooth surfaces of glasses lenses, no prismatic jumping phenomenon of the lenses in the prior art, beautiful appearance and the like, and the invention is further explained by combining the attached drawings and the embodiment:
As shown in fig. 1 to 7, in a first embodiment of the present invention, there is provided a pair of diopter glasses based on liquid crystal birefringence including a pair of diopter lenses for correcting vision, as shown in fig. 1, the pair of diopter lenses including:
The liquid crystal display panel comprises a first lens substrate 101, a second lens substrate 107, a plurality of supporting columns 109 arranged between the first lens substrate 101 and the second lens substrate 107, a liquid crystal layer 104 filled between the first lens substrate 101 and the second lens substrate 107, and a liquid crystal attaching frame 108 arranged around the liquid crystal layer 104; a first transparent electrode layer 102 and a second transparent electrode layer 106 are respectively arranged on the inner sides of the first lens substrate 101 and the second lens substrate 107; when no voltage is applied to the first transparent electrode layer 102 and the second transparent electrode layer 106, the liquid crystal is in a first state; when a voltage is applied to the first transparent electrode layer 102 and the second transparent electrode layer 106, the liquid crystal is in a second state;
At least one of the two interfaces of the liquid crystal layer 104 is an arc-shaped structure; the double-diopter lens is used for correcting vision, and the diopter difference of the double-diopter lens between the first state and the second state
N iss1Is the refractive index of the LC layer 104 in the first state, ns2Is the refractive index of the liquid crystal layer 104 in the second state, ns1≠ns2and is andSaid r1Is the radius of curvature, r, of the main optical axis of the first interface of the liquid crystal layer 1042is the radius of curvature of the main optical axis of the second interface of the LC layer 104, r1> 0, said r2Is greater than 0; if the first interface of the liquid crystal layer 104 is a concave surface, α is-1; if the first interface of the liquid crystal layer 104 is a plane, α is 0; if the first interface of the lc layer 104 is a convex surface, α is 1; if the second interface of the lc layer 104 is a concave surface, β is-1; if the second interface of the lc layer 104 is a plane, β is 0; if the second interface of the lc layer 104 is a convex surface, β is 1;
The height of each supporting column 109 corresponds to the thickness of the liquid crystal layer 104 at the position of the supporting column 109.
In this embodiment, a distance is left between the liquid crystal attaching frame 108 and the edge of the first lens substrate 101, a distance is left between the liquid crystal attaching frame 108 and the edge of the second lens substrate 107, and a mounting groove formed by the liquid crystal attaching frame 108, the first lens substrate 101 and the second lens substrate 107 is formed, and the mounting groove is used for mounting the double-diopter lens on the frame of the glasses.
in this embodiment, a first alignment layer 103 for pre-configuring the orientation of the liquid crystal layer 104 is disposed on the first transparent electrode layer 102, and a second alignment layer 105 for pre-configuring the orientation of the liquid crystal layer 104 is disposed on the second transparent electrode layer 106; the first alignment layer 103 and the second alignment layer 105 are obtained by adopting photoalignment, and the liquid crystal layer 104 adopts negative liquid crystal; when the double-diopter lens is in a first state, the negative liquid crystal is vertically arranged; when the double diopter lens is in the second state, the negative liquid crystal is aligned along the electric field, as shown in fig. 5.
It should be noted that the alignment direction of the alignment layer may be determined according to actual production requirements, and the optional alignment direction is along the main optical axis of the lens or the radial direction of the substrate.
Preferably, in the present embodiment, the alignment direction of the first alignment layer 103 and the second alignment layer 105 is along the main optical axis direction of the dual-refractive lens, as shown in fig. 3. In another embodiment of the present invention, the alignment direction of the first alignment layer 103 and the second alignment layer 105 is along the radial direction of the first lens substrate 101 or the second lens substrate 107, as shown in fig. 4.
In order to support two lens substrates, in the present embodiment, each support column 109 has a height diSatisfies the following conditions:D is0Is the thickness of the liquid crystal layer 104 in the direction of the main optical axis, thetai1The included angle between the position of the supporting column 109 and the main optical axis.
It should be noted that the first lens substrate 101 and the second lens substrate 107 may refract light, or may not affect the refraction path of light; in an embodiment of the invention, the first lens substrate 101, the second lens substrate 107 and the liquid crystal layer 104 participate in refraction of light; the processing steps are reduced, and the curvature radiuses of the two interfaces of the lens substrate can be set to be equal.
In the inventionIn the embodiment, the radius of curvature r of the principal optical axis of the third interface of the first lens substrate 1013and the radius of curvature r of the principal optical axis of the fourth interface4Are equal. Preferably, in the present embodiment, the radius of curvature r of the main optical axis of the fifth interface of the second lens substrate 1075and radius of curvature r of main optical axis of sixth interface6are equal.
It is worth mentioning that in order to facilitate the optometrist to fine-tune the lens powers, at least one of the first lens substrate 101 and the second lens substrate 107 is used for polishing and to adjust the first birefringence value of the dual-diopter lens in the first state. Preferably, in the present embodiment, the first lens substrate 101 is used for polishing and adjusting the lens power. In another embodiment of the present invention, the second lens substrate 107 is used to polish and fine tune the lens power.
It should be noted that, in this embodiment, the supporting pillars 109 may be manufactured by a 3D printing process, and the attaching frame 108 may also be manufactured by a 3D printing process.
The following description is made by taking an example of a specific glasses.
Example 1, as shown in fig. 6, a user needs to equip myopic glasses with normal power of 200 degrees and a second state power of 150 degrees, namely, the first diopter is-2D, the second diopter is-1.5D, and the difference between the two diopters is-0.5D. In the figure, a first mirror substrate 101, a liquid crystal layer 104, and a second mirror substrate 107 are respectively provided from bottom to top. Wherein the lower surface of the first lens substrate 101 is also used for polishing and fine-tuning the lens power, and the upper and lower interfaces of the second lens substrate 107 have the same curvature radius and diopterIs 0.
The optical structure of the liquid crystal layer 104 is a concave-convex mirror, α is-1, and β is 1; since the birefringence and the difference in birefringence of the liquid crystal are determined after the liquid crystal material is selected, it is assumed that the first refractive index of the liquid crystal is 1.8, the second refractive index is 1.3, and the second radius of curvatureAccording tocan obtain r2＝0.5m。
According toCalculating a first state diopter of the liquid crystal layer 104
According toDetermining a second state diopter of the liquid crystal layer 104
According toobtaining the diopter of the first lens substrate 101That is, it is necessary to select the second lens substrate 107 having a diopter of-1.0D and perform a polishing process on the lower surface of the second lens substrate 107 in order to adjust the power.
Regarding the parameter problem of the supporting pillars 109, as shown in FIG. 6, the height of the supporting pillars 109 in each region can be obtained according to the geometric relationshipWherein d is0The setting is carried out according to the experience of optometrists, and the value range is generally 50-100 mu m. It is worth mentioning that in this example, the first interface of the lc layer 104 is concave, α is-1, the second interface is convex, β is 1, and in fact, the height of the supporting pillars 109 is substantially the same
Example 2, as shown in FIG. 7, the user needs to be provided with normalityThe presbyopic glasses with the power of 100 degrees and the power of 50 degrees in the second state are the presbyopic glasses, namely the first diopter is +1D, the second diopter is +0.5D, and the difference of the two diopters is 0.5D. In the figure, a first mirror substrate 101, a liquid crystal layer 104, and a second mirror substrate 107 are respectively provided from bottom to top. Wherein the lower surface of the first lens substrate 101 is also used for polishing and fine-tuning the lens power, and the upper and lower interfaces of the second lens substrate 107 have the same curvature radius and diopterIs 0.
the optical structure of the liquid crystal layer 104 is a lenticular lens, where α is 1 and β is 1; after the liquid crystal material is selected, the birefringence and the difference of the birefringence of the liquid crystal are determined, and the first refractive index of the liquid crystal is assumed to be 1.8, the second refractive index is assumed to be 1.3, and the second curvature radius is assumed to beAccording toCan obtain the product
According toCalculating a first state diopter of the liquid crystal layer 104
According toDetermining a second state diopter of the liquid crystal layer 104
According toObtaining the diopter of the first lens substrate 101Namely, the lens blank with diopter +0.5D is selected and polished, and the diopter is adjusted to + 0.2D.
Regarding the parameter issue of the support pillars 109, as shown in FIG. 7, the height of the support pillars 109 in each region can be obtained according to the geometric relationshipwherein d is0The setting is carried out according to the experience of optometrists, and the value range is generally 50-100 mu m. It is worth mentioning that in this example, the first interface of the lc layer 104 is convex, α is 1, the second interface is convex, β is 1, and actually, the height of the supporting pillars 109 is substantially the same
The working principle of the invention is as follows: no voltage is applied to the electrodes, liquid crystal deflects under the action of the alignment layer, and the diopter of the lens is a first diopter; under the condition that voltage is applied to the electrodes, the liquid crystal deflects under the influence of an electric field, and the diopter of the lens is the second diopter. Certainly, the double-refraction glasses provided by the invention can be provided with a switch, so that the user can adjust the glasses by himself. Also can set up the range finding circuit, detect the object distance, the pair of diopters of glasses self adjustment.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (8)

1. Double-diopter glasses based on liquid crystal birefringence, comprising a double-diopter lens for correcting vision, characterized in that said double-diopter lens comprises:
The liquid crystal display comprises a first lens substrate, a second lens substrate, a plurality of support columns arranged between the first lens substrate and the second lens substrate, a liquid crystal layer filled between the first lens substrate and the second lens substrate, and liquid crystal attaching frames arranged around the liquid crystal layer; a first transparent electrode layer and a second transparent electrode layer are respectively arranged on the inner sides of the first lens substrate and the second lens substrate; when no voltage is applied to the first transparent electrode layer and the second transparent electrode layer, the liquid crystal is in a first state; when voltage is applied to the first transparent electrode layer and the second transparent electrode layer, the liquid crystal is in a second state;
The first interface of the liquid crystal layer is a convex surface, and the second interface of the liquid crystal layer is a convex surface; the double-diopter lens is used for correcting vision, and the diopter difference of the double-diopter lens between the first state and the second stateN iss1Is the refractive index of the liquid crystal layer in the first state, ns2Is the refractive index of the liquid crystal layer in the second state, ns1≠ns2Said r1Radius of curvature of main optical axis of first interface of liquid crystal layer, r2Radius of curvature of main optical axis of second interface of liquid crystal layer, r1> 0, said r2＞0；
The height of each support column corresponds to the thickness of the liquid crystal layer at the position of the support column, and each support column is highD is0Thickness of liquid crystal layer in the direction of main optical axis, thetai1The included angle between the placing position of the support column and the main optical axis is shown.
2. the liquid crystal birefringence-based dual diopter glasses of claim 1, wherein the liquid crystal attaching frame has a distance from the edge of the first lens substrate, and the liquid crystal attaching frame has a distance from the edge of the second lens substrate, and a mounting groove formed by the liquid crystal attaching frame, the first lens substrate and the second lens substrate is formed, and the mounting groove is used for mounting the dual diopter lens on the frame of the glasses.
3. The liquid crystal birefringence-based bifocal ophthalmic lens of claim 1, wherein: a first alignment layer used for pre-configuring the orientation of the liquid crystal layer is arranged on the first transparent electrode layer, and a second alignment layer used for pre-configuring the orientation of the liquid crystal layer is arranged on the second transparent electrode layer; the first alignment layer and the second alignment layer are obtained by adopting optical alignment, and the liquid crystal layer adopts negative liquid crystal; when the double-diopter lens is in a first state, the negative liquid crystal is vertically arranged; when the double diopter lens is in a second state, the negative liquid crystal is arranged along the electric field.
4. The liquid crystal birefringence-based bifocal ophthalmic lens of claim 3, wherein: the alignment direction of the first alignment layer and the second alignment layer is along the direction of the main optical axis of the double-refraction lens.
5. The liquid crystal birefringence-based bifocal ophthalmic lens of claim 3, wherein: the alignment direction of the first alignment layer and the second alignment layer is along the radial direction of the first lens substrate or the second lens substrate.
6. The liquid crystal birefringence-based bifocal ophthalmic lens of claim 1, wherein: a radius of curvature r of a principal optical axis of a third interface of the first lens substrate3And the radius of curvature r of the principal optical axis of the fourth interface4Are equal.
7. The liquid crystal birefringence-based bifocal ophthalmic lens of claim 1, wherein: a main optical axis of a fifth interface of the second lens substrateRadius of curvature r5And radius of curvature r of main optical axis of sixth interface6Are equal.
8. the liquid crystal birefringence-based bifocal ophthalmic lens of claim 1, wherein: at least one of the first lens substrate and the second lens substrate is used for polishing, and a first diopter value of the double diopter lens in a first state is adjusted.
CN201711149671.4A 2017-11-18 2017-11-18 Double-diopter glasses based on liquid crystal birefringence Expired - Fee Related CN107797307B (en)

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CN201218886Y (en) * 2008-05-22 2009-04-08 聚晶光电股份有限公司 Liquid crystal lens with hollow electrode
CN105683784A (en) * 2013-08-01 2016-06-15 曼彻斯特大学 Liquid crystal device and method of manufacture

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US10437129B2 (en) * 2015-11-10 2019-10-08 Verily Life Sciences Llc Dynamic diffractive liquid crystal lens

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Publication number Priority date Publication date Assignee Title
CN201218886Y (en) * 2008-05-22 2009-04-08 聚晶光电股份有限公司 Liquid crystal lens with hollow electrode
CN105683784A (en) * 2013-08-01 2016-06-15 曼彻斯特大学 Liquid crystal device and method of manufacture

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