Longitudinal chromatic aberration adjusting system based on geometric phase liquid crystal lens

Abstract

The invention belongs to the field of optical display, and particularly relates to a longitudinal chromatic aberration adjusting system based on a geometric phase liquid crystal lens, which comprises the geometric phase liquid crystal lens for changing imaging focal lengths of different wavebands of visible light incident to the geometric phase liquid crystal lens and reversing the size relation of the imaging focal lengths of the different wavebands of the visible light; the circular polarizing film modulates the light incident on the circular polarizing film into circular polarized light and eliminates stray light; the preset lens is combined with the geometric phase liquid crystal lens to reduce the focal power; after incident light passes through the geometric phase liquid crystal lens, the circular polarizer and the preset lens, different visible light wave bands are imaged on the retina of a viewer, and longitudinal chromatic aberration is eliminated. Through the above arrangement, through the combination of the geometric phase liquid crystal lens, the circular polarizer and the preset lens, the incident light can have basically the same focal length on the retina of the eyes of a viewer, that is, the interference of a longitudinal error on eye imaging is eliminated, and the viewing experience is improved.

Description

[0001] This application is a Chinese invention patent application with the application number 2023800181610, the filing date of December 7, 2023, and the invention title of a divisional application of a longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens. The parent application is an application that entered the Chinese national phase with the international application number PCT / CN2023 / 136937. Technical Field

[0002] The present invention belongs to the field of optical displays, and particularly relates to a longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens. Background Art

[0003] When a viewer observes a nearby object, through the adjustment of the lens in the eye, the imaging of light in the short wavelength band of visible light falls near the retina, while the imaging of light in the long wavelength band of visible light falls behind the retina, thereby causing a tendency for the retina to move backward, that is, promoting the formation of a force for the eyeball to grow longitudinally backward. Over time, myopia will be formed.

[0004] Based on the above existing problems, it is necessary to reduce the probability of myopia by eliminating the interference factors of longitudinal chromatic aberration and eliminate longitudinal chromatic aberration without introducing additional diopters. The solutions achieved by means of traditional refractive optical elements in the prior art are too bulky and not suitable for long-term wear by users, resulting in poor user experience. Summary of the Invention

[0005] The present invention is precisely proposed based on the above-mentioned needs of the prior art. The technical problem to be solved by the present invention is to provide a longitudinal chromatic aberration adjustment system and glasses based on a geometric phase liquid crystal lens to improve the wearing experience of users.

[0006] To solve the above problems, the technical solutions provided by the present invention include:

[0007] A longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens is provided, including: a geometric phase liquid crystal lens that changes the imaging focal lengths of different wavelength bands of visible light incident on the geometric phase liquid crystal lens and reverses the magnitude relationship of the imaging focal lengths of different visible light wavelength bands; a circular polarizer that modulates the light incident on the circular polarizer into circularly polarized light to eliminate stray light; a preset lens that combines with the geometric phase liquid crystal lens to reduce the optical power; after the incident light passes through the geometric phase liquid crystal lens, the circular polarizer, and the preset lens, the imaging of different visible light wavelength bands is on the retina of the viewer, eliminating longitudinal chromatic aberration.

[0008] Through the above settings, the combination of the geometric phase liquid crystal lens, circular polarizer, and preset lens enables the incident light to have substantially the same focal length on the retina of the viewer's eye, that is, to eliminate the interference of longitudinal error on eye imaging. Among them, the geometric phase liquid crystal lens is combined with the viewer's lens to eliminate different focal lengths formed due to different wavelengths. The circular polarizer ensures the normal operation of the above system and avoids ghosting and stray light. The preset lens is used to cooperate with the geometric phase liquid crystal lens to form an appropriate optical power and enhance the viewing experience.

[0009] Preferably, the longitudinal chromatic aberration adjustment system based on the geometric phase liquid crystal lens further includes sub-modules, and the sub-modules include the geometric phase liquid crystal lens, circular polarizer, and preset lens. A plurality of the sub-modules are arranged in a preset manner to form a longitudinal chromatic aberration adjustment system based on the geometric phase liquid crystal lens.

[0010] By setting the sub-modules arranged in a preset manner to avoid the problem of perspective resolution caused by lateral chromatic aberration and ensure the viewing experience of the viewer.

[0011] Preferably, the diopter of the geometric phase liquid crystal lens is a first diopter less than zero, and the diopter of the preset lens is a second diopter greater than zero. The sum of the first diopter and the second diopter is 0.

[0012] Through the above settings, the longitudinal chromatic aberration adjustment system maintains the characteristics of a plano lens and is suitable for people for myopia prevention and control and myopic people. For people for myopia prevention and control, the above system is used to eliminate the influence of longitudinal chromatic aberration on the eyes, prevent the elongation of the eye axis, and effectively prevent myopia. For myopic people, the combination of the longitudinal chromatic aberration adjustment system and ordinary myopia correction lenses can simultaneously achieve the effects of correcting myopia and eliminating longitudinal chromatic aberration, so as to be applicable to most myopic people. It only needs to stack a longitudinal chromatic aberration adjustment system with the characteristics of a plano lens on the myopia glasses used daily, and the adaptability is highly flexible.

[0013] Preferably, the absolute value of the first diopter is greater than the absolute value of the second diopter.

[0014] Through the above settings, the longitudinal chromatic aberration adjustment system has a certain diopter, and the effects of correcting myopia and eliminating longitudinal chromatic aberration can be directly achieved through this system. The diopter of the longitudinal chromatic aberration adjustment system is adjusted according to the actual eye conditions of the viewer without the need to combine with myopia correction lenses. The overall structure of the longitudinal chromatic aberration adjustment system is light and has high pertinence.

[0015] Preferably, the range of the first diopter is -10D to -1D; the range of the second diopter is 1D to 10D.

[0016] Through the above settings, the diopter of the system can be adjusted within a large range to adapt to most people.

[0017] Preferably, the geometric phase liquid crystal lens includes a photo-aligned layer and a multi-layer liquid crystal layer disposed on the photo-aligned layer; the lowermost molecules in the liquid crystal layer adjacent to the photo-aligned layer are arranged in the same manner as the molecules in the photo-aligned layer.

[0018] Through the above settings, the light efficiency is improved.

[0019] Preferably, the molecules in contact between adjacent liquid crystal layers are arranged in the same direction.

[0020] Through the above settings, the light efficiency is improved.

[0021] Preferably, the liquid crystal molecules in the liquid crystal layer form a helical structure along the first direction.

[0022] Through the above settings, the light efficiency is improved.

[0023] Preferably, the angle of the molecules in the photo-aligned layer in the plane satisfies the condition where f is the focal length of the geometric phase liquid crystal lens, λ is the wavelength, β(x, y) is the high-order phase term, x is the abscissa of the plane where the liquid crystal lens is located, and y is the ordinate of the plane where the liquid crystal lens is located.

[0024] Preferably, the area of the plane where the sub-module is located is from 0.25 square millimeters to 25 square millimeters.

[0025] A pair of glasses is also provided, including lenses, and the lenses include any one of the above longitudinal chromatic aberration adjustment systems based on geometric phase liquid crystal lenses.

[0026] Through the above settings, a lightweight glasses structure is formed according to the actual situation of the viewer, thereby effectively eliminating the influence of longitudinal chromatic aberration on the viewing experience of the viewer.

[0027] Compared with the prior art, the present invention eliminates longitudinal chromatic aberration by setting a geometric phase liquid crystal lens to cooperate with the lens of the eye, eliminates ghosting and stray light by setting a circular polarizer, forms a suitable optical power by setting a preset lens to cooperate with the geometric phase liquid crystal lens, and has a good viewing experience while eliminating longitudinal chromatic aberration through the above settings; at the same time, a plurality of sub-modules are provided, and the sub-modules are arranged in a preset manner to avoid the perspective resolution caused by the generated lateral chromatic aberration; in addition, the diopter of the geometric phase liquid crystal lens is set to be flexibly applied in different scenarios; and the light efficiency of the liquid crystal lens in the visible light band is improved by adjusting the layer level of the geometric phase liquid crystal lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the embodiments recorded in the embodiments of this specification. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Schematic diagram of longitudinal chromatic aberration formed by light of different wavelengths on the retina when the eyes look into the distance;

[0030] Figure 2 Schematic diagram of the imaging of light of different wavelengths near the retina when the eyes look near without focusing;

[0031] Figure 3 Schematic diagram of the imaging of light of different wavelengths near the retina when the eyes look near and focus;

[0032] Figure 4 Planar schematic diagram of the longitudinal chromatic aberration adjustment system formed by the arrangement of sub - modules;

[0033] Figure 5 Schematic diagram of the imaging of light of different wavelengths through a geometric - phase liquid - crystal lens;

[0034] Figure 6 Side - view cross - sectional structure diagram of the sub - module of the longitudinal chromatic aberration adjustment system;

[0035] Figure 7 Configuration diagram of the geometric - phase liquid - crystal lens;

[0036] Figure 8 Schematic diagram of the helical structure in the geometric - phase liquid - crystal lens;

[0037] Figure 9 Planar schematic diagram of the photo - alignment layer in the geometric - phase liquid - crystal lens;

[0038] Figure 10 Schematic diagram of the molecular structure of the photo - alignment layer;

[0039] Figure 11 Schematic diagram of experimental data;

[0040] Figure 12 Schematic diagram of the imaging of light on the retina after passing through the longitudinal chromatic aberration adjustment system.

[0041] Reference numerals:

[0042] 1. Short-waveband imaging; 2. Medium-waveband imaging; 3. Long-waveband imaging; 4. Retina; 5. Lens; 6. Sub-module; 601. Geometric phase liquid crystal lens; 601A. Photo-aligned layer; 601B. Liquid crystal layer; 602. Circular polarizer; 603. Preset lens; 7. Longitudinal chromatic aberration adjustment system; 8. Spiral structure; 9. Photo-aligned layer molecules. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0044] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, the term "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The terms "top", "bottom", "above", "below" and "on" described throughout the text are relative positions of the components of the device, such as the relative positions of the top and bottom substrates inside the device. It can be understood that the device is multifunctional and has nothing to do with its orientation in space.

[0046] To facilitate the understanding of the embodiments of the present application, the following will further explain with specific embodiments in conjunction with the accompanying drawings. The embodiments do not constitute a limitation to the embodiments of the present application.

[0047] Embodiment 1

[0048] When a viewer is looking at a distant object, the light entering the eye is adjusted and focused by the lens 5. However, since the lens 5 has different refractive indices for light with different wavelengths, lights of different wavelength bands have different imaging positions in the eye. When the viewer is looking at a distant object, the lens 5 is in a relaxed state. At this time, the focal length of the short-wavelength band (blue light) imaging is less than that of the middle-wavelength band (green light) imaging, and the focal length of the middle-wavelength band imaging 2 is less than that of the long-wavelength band (red light) imaging. If the middle-wavelength band imaging 2 is on the retina 4, the short-wavelength band imaging 1 will fall in front of the retina 4 and the long-wavelength band imaging 3 will fall behind the retina 4; if the short-wavelength band imaging 1 is on the retina 4, both the middle-wavelength band imaging 2 and the long-wavelength band imaging 3 will be behind the retina 4; if the long-wavelength band imaging 3 is on the retina 4, both the short-wavelength band imaging 1 and the middle-wavelength band imaging 2 will fall in front of the retina 4. As Figure 1 shown, the middle-wavelength band imaging 2 on the retina 4 can make the image formed by the distant object focus near the retina 4. At this time, there are images both in front of and behind the retina 4, which is relatively balanced, and the retina 4 will not have a tendency to move forward or backward. Moreover, compared with the short-wavelength band imaging 1 on the retina 4 or the long-wavelength band imaging 3 on the retina 4, the middle-wavelength band imaging 2 on the retina 4 can make the overall image have the highest clarity.

[0049] When a viewer is looking at a nearby object, as Figure 2 shown, if the lens 5 is still in a relaxed state, after the light entering the eye is adjusted and focused by the lens 5, the short-wavelength band imaging 1, the middle-wavelength band imaging 2, and the long-wavelength band imaging 3 will all be behind the retina 4, and the overall image is blurred at this time.

[0050] When a viewer is looking at a nearby object and the lens 5 thickens, as Figure 3 shown, after the light entering the eye is focused and adjusted by the lens 5, when the short-wavelength band imaging 1 is adjusted to be on the retina 4, the overall image seen is relatively clear. In this case, the lens 5 will not be adjusted again to make the middle-wavelength band imaging 2 on the retina 4. At this time, both the middle-wavelength band imaging 2 and the long-wavelength band imaging 3 are behind the retina 4. Such signals will stimulate the growth of the eye axis at the positions of the middle-wavelength band imaging 2 and the long-wavelength band imaging 3 behind the eye, which will cause the eye axis to elongate, resulting in myopia or deepening the degree of myopia.

[0051] Based on the above principle, this embodiment provides a longitudinal chromatic aberration adjustment system 7 based on a geometric phase liquid crystal lens, as Figures 4 - 10 shown.

[0052] The longitudinal chromatic aberration adjustment system 7 based on the geometric phase liquid crystal lens will be hereinafter simply referred to as the "longitudinal chromatic aberration adjustment system". The longitudinal chromatic aberration adjustment system 7 includes a plurality of sub-modules 6. The area of the plane where the sub-modules 6 are located is from 0.25 square millimeters to 25 square millimeters. The plurality of sub-modules 6 are arranged in an array to avoid the problem of low perspective resolution caused by lateral chromatic aberration. Exemplarily, as Figure 4 shown, the sub-module 6 is rectangular and arranged in a three-row and four-column form. There is no limitation on the shape and arrangement form of the plurality of sub-modules 6. The area occupied by the sub-module in the plane is from 0.25 square millimeters to 25 square millimeters

[0053] As Figure 6 shown, the sub-module 6 includes a geometric phase liquid crystal lens 601.

[0054] The geometric phase liquid crystal lens 601, as Figure 5 shown, is a planar diffractive optical element. When parallel light in the visible light band is incident on the geometric phase liquid crystal lens 601, the focal length of the short-wavelength imaging 1 through the geometric phase liquid crystal lens 601 is greater than the focal length of the middle-wavelength imaging 2, and the focal length of the middle-wavelength imaging 2 is greater than the focal length of the long-wavelength imaging 3. That is to say, the longitudinal chromatic aberration after passing through the geometric phase liquid crystal lens 601 is opposite to the longitudinal chromatic aberration of passing through the crystalline lens 5 or traditional refractive optical elements. The diopter of the geometric phase liquid lens is set between -10D and -1D.

[0055] The configuration of the geometric phase liquid crystal lens 601 is as Figures 7 - 10 shown, and includes a photo-alignment layer 601A and liquid crystal 601B. Its bottom layer is the photo-alignment layer 601A. The arrangement of the photo-alignment layer molecules 9 is as Figure 9 and Figure 10 shown. Specifically, the angle of the photo-alignment layer molecules 9 in the plane distribution satisfies the condition where f is the focal length of the geometric phase liquid crystal lens, λ is the wavelength, β(x,y) is the high-order phase term, and x and y are the coordinates of the plane where the liquid crystal lens is located respectively. There are N layers of liquid crystal 601B arranged above the photo-alignment layer 601A. The molecules at the bottom of the liquid crystal 601B adjacent to the photo-alignment layer 601A are arranged in the same way as the photo-alignment layer molecules 9. The molecules in contact between the adjacent liquid crystals 601B in the N layers of liquid crystal 601B are arranged in the same direction, and there is a helical structure 8 in the first direction in each layer of liquid crystal 601B, and this helical structure 8 is formed spontaneously. The spontaneous helical structure 8 is specifically as follows: the thickness of the liquid crystal molecules in the i-th layer of liquid crystal 601B is d i , and the rotation angle of the liquid crystal molecules in this layer in the first direction is α i , where i = 1 to N, and the geometric phase liquid crystal lens 601 has an efficiency greater than 90% in the visible light band.

[0056] Compared with traditional lenses, the geometric phase liquid crystal lens 601 can achieve a larger reverse longitudinal chromatic aberration with a smaller optical power. According to Figure 11 the experimental data shown: For a lens with a focal length of 50 cm (2.0 D) made of traditional glass material NBK7, its Abbe number is approximately 64. The optical power measured at blue light (488 nm) is 2.01 D, at green light wavelength (532 nm) is 2.0 D, and at red light wavelength (633 nm) is 1.98 D. The difference in optical power between blue and red light is 0.03 D. The measured optical powers of the geometric phase liquid crystal lens 601 at blue (488 nm), green (532 nm), and red (633 nm) are 1.85 D, 1.99 D, and 2.36 D respectively. The difference in optical power between blue and red light is -0.51 D. Based on the above experimental data, it can be seen that the optical power-wavelength dispersion relationship of the geometric phase liquid crystal lens 601 is opposite to that of the traditional glass lens; the absolute value of the Abbe number of the geometric phase liquid crystal lens 601 is approximately 17 times that of the traditional glass material NBK7. Therefore, the geometric phase liquid crystal lens 601 can achieve a larger reverse longitudinal chromatic aberration with a smaller optical power.

[0057] The longitudinal chromatic aberration adjustment system 7 further includes a circular polarizer 602 and a preset lens 603, and the relative arrangement order among the geometric phase liquid crystal lens 601, the circular polarizer 602, and the preset lens 603 can be arbitrarily adjusted. The circular polarizer 602 is set to ensure the normal operation of the geometric phase liquid crystal lens 601 and avoid ghosting and stray light; the diopter of the preset lens 603 is set between 1 D and 10 D. The preset lens 603 can cooperate with the geometric phase liquid crystal lens 601 to form an appropriate optical power. If the preset lens 603 is not set, a large optical power will be finally formed, seriously affecting the viewing experience.

[0058] As Figure 12 shown, whether it is light rays emitted from nearby objects or distant objects, after passing through the longitudinal chromatic aberration adjustment system 7 and the viewer's lens 5, the entire visible light band will be focused on the viewer's retina 4 without spatial separation, that is, there is no longitudinal chromatic aberration, thus effectively avoiding the elongation of the eyeball caused by longitudinal chromatic aberration.

[0059] Furthermore, after the light rays are modulated by the longitudinal chromatic aberration adjustment system 7, the focal length of the long-wave imaging 3 is less than the focal length of the short-wave imaging 1, so as to reverse the longitudinal chromatic aberration, thereby generating the effect of reversing the signal that stimulates the longitudinal elongation of the eyeball.

[0060] In some application scenarios, the longitudinal chromatic aberration adjustment system 7 maintains the characteristics of a plano lens, that is, the diopter of the system is 0, and the diopters of the geometric phase liquid crystal lens 601 and the preset lens 603 are opposite. Exemplarily, the diopter of the geometric phase liquid crystal lens 601 is -5D, and the diopter of the preset lens 603 is 5D. The longitudinal chromatic aberration adjustment system 7 with the characteristics of a plano lens is suitable for people with normal eyes to prevent myopia. In addition, by simply combining the longitudinal chromatic aberration adjustment system 7 with an ordinary myopia correction lens, the effects of correcting myopia and eliminating longitudinal chromatic aberration can be achieved simultaneously, so as to be applicable to most myopic people. It only needs to stack a longitudinal chromatic aberration adjustment system 7 with the characteristics of a plano lens on the myopia glasses used in daily life, and the adaptability is high.

[0061] In some application scenarios, the longitudinal chromatic aberration adjustment system 7 can be set to have a certain diopter itself. Specifically, the absolute value of the diopter of the geometric phase liquid crystal lens 601 is greater than the absolute value of the diopter of the preset lens 603. At this time, the effects of correcting myopia and eliminating longitudinal chromatic aberration can also be achieved simultaneously. The diopter of the longitudinal chromatic aberration adjustment system 7 can be adjusted personalized according to the actual eye conditions of the viewer without the need to combine with a myopia correction lens. The overall structure of the longitudinal chromatic aberration adjustment system 7 is light and has high pertinence.

[0062] Through the above settings, the longitudinal chromatic aberration entering the viewer's eyes is eliminated, thereby avoiding the adverse effect of the elongated eye axis caused by the longitudinal chromatic aberration. At the same time, the longitudinal chromatic aberration adjustment system 7 is combined with a suitable lens to simultaneously correct myopia and eliminate longitudinal chromatic aberration according to the actual eye use conditions of the viewer.

[0063] Embodiment 2

[0064] This embodiment provides a pair of glasses, which includes lenses, and the lenses include the longitudinal chromatic aberration adjustment system 7 based on the geometric phase liquid crystal lens 601 in Embodiment 1.

[0065] Through the above settings, a suitable longitudinal chromatic aberration adjustment system 7 based on the geometric phase liquid crystal lens 601 is matched according to the different eye conditions of the wearer to effectively eliminate the longitudinal chromatic aberration, thereby avoiding the elongation of the eye axis caused by the longitudinal chromatic aberration, which is beneficial to the prevention and alleviation of myopia.

[0066] The specific embodiments described above further elaborate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only the specific embodiments of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens, characterized in that, comprising: A geometric phase liquid crystal lens that changes the imaging focal lengths of different wavelength bands of visible light incident on the geometric phase liquid crystal lens and reverses the magnitude relationship of the imaging focal lengths of different visible light wavelength bands; A circular polarizer that modulates the light incident on the circular polarizer into circularly polarized light to eliminate stray light; A preset lens that combines with the geometric phase liquid crystal lens to reduce the optical power; After the incident light passes through the geometric phase liquid crystal lens, the circular polarizer, and the preset lens, images of different visible light wavelength bands are formed on the viewer's retina, eliminating longitudinal chromatic aberration.

2. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 1, characterized in that, The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens further includes sub-modules, and the sub-modules include the geometric phase liquid crystal lens, the circular polarizer, and the preset lens. A plurality of the sub-modules are arranged in a preset manner to form a longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens.

3. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 1, characterized in that, The diopter of the geometric phase liquid crystal lens is a first diopter less than zero, and the diopter of the preset lens is a second diopter greater than zero, and the sum of the first diopter and the second diopter is 0.

4. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 3, characterized in that, The absolute value of the first diopter is greater than the absolute value of the second diopter.

5. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 3, characterized in that, The range of the first diopter is -10D to -1D; the range of the second diopter is 1D to 10D.

6. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 1, characterized in that, The geometric phase liquid crystal lens includes a photo-aligned layer and a plurality of liquid crystal layers disposed on the photo-aligned layer; The lowermost molecules in the liquid crystal layer adjacent to the photo-aligned layer are arranged in the same arrangement as the molecules in the photo-aligned layer.

7. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 6, characterized in that, The molecules in contact between adjacent liquid crystal layers are arranged in the same direction.

8. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 6, characterized in that, The liquid crystal molecules in the liquid crystal layer form a helical structure along a first direction.

9. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 6, characterized in that, The angle of the molecules in the photo-alignment layer in the plane satisfies the condition where f is the focal length of the geometric phase liquid crystal lens, λ is the wavelength, β(x, y) is the high-order phase term, x is the abscissa of the plane where the liquid crystal lens is located, and y is the ordinate of the plane where the liquid crystal lens is located.

10. The longitudinal chromatic aberration adjustment system based on a geometric phase liquid crystal lens according to claim 2, characterized in that, The area of the plane where the sub-module is located is from 0.25 square millimeters to 25 square millimeters.

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