Binocular near-to-eye integrated imaging 3D display system based on superlens array

Abstract

The invention discloses a binocular near-to-eye integrated imaging 3D display system based on a super lens array, which comprises a first micro display screen arranged in a right eye vision field, a second micro display screen arranged in a left eye vision field, a first super lens array arranged on one side of the first micro display screen for displaying an image, and a second super lens array arranged on the other side of the first micro display screen for displaying an image. A second super lens array is arranged on one side of the second micro display screen for displaying an image; the first micro display screen and the second micro display screen are used for providing image source light with binocular parallax, and the first super lens array and the second super lens array are used for modulating the image source light with binocular parallax and generating two 3D images with binocular parallax and depth information. Compared with the prior art, the focusing positions of the left eye and the right eye of a viewer and the convergence angles can be adjusted at the same time, the more real and accurate spatial stereoscopic impression is brought to a user, and the natural observation habit of the human body is better met.

Description

Technical Field

[0001] The present invention relates to the field of micro-nano optics and optical imaging technology, and more specifically, to a binocular near-eye integrated imaging 3D display system based on a superlens array. Background Art

[0002] Benefiting from the increase in pixel density of micro screens in recent years, head-mounted display devices have received increasing attention in academia and the business community. In real life, due to the convergence of human eyes, the angle of rotation between the eyes will change according to the actual depth of the observation position; at the same time, the focus position of the eyes will also be adjusted with the depth of the object being viewed. At present, most head-mounted display devices on the market only use the principle of binocular parallax to achieve the effect of 3D images when performing near-eye display. The angle of rotation between the user's eyes will change with the depth of 3D image imaging due to the convergence effect. However, since both eyes need to focus on the surface of the device screen to see the displayed image clearly, this causes the user's eyes to always focus on the screen surface. At this time, there is a convergence adjustment conflict between the rotation angle of the eyes that changes at any time due to the convergence effect and the focus position of the eyes that is always fixed, which causes the user to feel dizzy and other discomfort.

[0003] Integrated imaging light field display is a true 3D display technology that makes the focus position of the observer's eyes no longer fixed on the surface of the micro screen, but changes at any time with the actual generation position of the 3D image, which is more in line with the natural viewing habits of the human eye and more comfortable. It usually uses a microlens array. However, the existing microlens array device itself is large in size, heavy, and has an undulating surface, which is not conducive to its combination with other devices and cannot achieve high-quality integrated imaging 3D display effects.

[0004] The prior art discloses a near-eye integrated imaging 3D display system and a head-mounted display device based on a super lens array, wherein the near-eye integrated imaging 3D display system includes a micro display screen for displaying an image source and providing image source light, and a super lens array; the super lens array is arranged on one side of the micro display screen displaying an image; the super lens array is used to modulate the image source light of the micro display screen so that the image source light reconstructs a 3D image on different depth planes. The defect of this solution is that it can only adjust the focus position of the viewer's single eye, but cannot adjust the viewer's binocular convergence adjustment angle.

[0005] To this end, in combination with the above requirements and the defects of the prior art, the present application proposes a binocular near-eye integrated imaging 3D display system based on a superlens array. Summary of the invention

[0006] The present invention provides a binocular near-eye integrated imaging 3D display system based on a superlens array, which matches the focus position of the viewer's binocular eyes, the convergence adjustment angle of the binocular eyes, and the depth position of the generated 3D content, thereby providing the user with a more realistic and accurate sense of spatial stereoscopic perception, which is more in line with the natural observation habits of the human body.

[0007] The primary purpose of the present invention is to solve the above technical problems. The technical solution of the present invention is as follows:

[0008] A first aspect of the present invention provides a binocular near-eye integrated imaging 3D display system based on a superlens array, comprising: a first micro display screen arranged in the field of view of a right eye, and a second micro display screen arranged in the field of view of a left eye, wherein a first superlens array is arranged on a side of the first micro display screen for displaying an image, and a second superlens array is arranged on a side of the second micro display screen for displaying an image; the first micro display screen and the second micro display screen are used to provide image source light with binocular parallax, and the first superlens array and the second superlens array are used to modulate the image source light with binocular parallax to generate two 3D images with binocular parallax and depth information.

[0009] Furthermore, the first super lens array and the second super lens array have the same focal length, and are both composed of a plurality of super lenses with the same size and focal length, wherein the size of the super lenses is an integer multiple of the pixel size of the first micro display screen and the second micro display screen.

[0010] Furthermore, a first beam splitter element is arranged between the first super lens array and the right eye, and a second beam splitter element is arranged between the second super lens array and the left eye. The first beam splitter element and the second beam splitter element are used to fuse the reconstructed 3D image with the external ambient light, and to switch the display effects of augmented reality and virtual reality by adjusting the ratio of the 3D image light and the external light during the fusion process.

[0011] Furthermore, the first superlens array and the second superlens array include a substrate layer and a micro-nano structure layer, the material of the micro-nano structure layer is ultraviolet curing glue doped with nanoparticles, the micro-nano structure is arranged on the substrate layer in a cylindrical structure, and the arrangement of the micro-nano structure satisfies the phase distribution of the superlens array.

[0012] Furthermore, the metalenses are periodically arranged in the first metalenses array and the second metalenses array, and all metalenses satisfy the following phase distribution formula:

[0013]

[0014] Among them, the center of the super lens is taken as the origin coordinate, (x, y) represents the coordinate position from the center of the super lens, λ represents the wavelength of the incident light, f represents the focal length of the super lens, and C is the phase constant.

[0015] Furthermore, the image source light with binocular parallax provided by the first microdisplay screen and the second microdisplay screen is a 2D image generated by an integrated imaging algorithm, and the integrated imaging algorithm controls the generation of the image source light according to the positions of the left and right eyes of the viewer, the pupil distance of the two eyes, the depth of the displayed 3D object, the distance between the superlens array and the screen, the focal cycle duty cycle of the superlens array, the size of the screen pixels and the number of modulated pixels of a single superlens.

[0016] Furthermore, the generated 2D image satisfies the following formula as image source light:

[0017]

[0018] Among them, pa is the parallax of the central areas of the two 2D images displayed by the two micro screens, corresponding to the difference in the field of view of the left and right eyes, L is the binocular pupil distance of the viewer, depth is the distance between the imaging surface and the lens, gap is the distance between the screen and the super lens array, and pp is the pixel size of the micro display screen; after the light emitted by the image source light enters the right eye or the left eye, a virtual 3D object will be reconstructed at the same depth and position in the distance. When the two eyes observe separately, 3D images under different perspectives are obtained, and when the two eyes observe together, a complete 3D object is reconstructed in the distance.

[0019] A second aspect of the present invention provides a head-mounted display device, comprising: a bracket and a connector, wherein the bracket is mounted on glasses via the connector, and the bracket is provided with a binocular near-eye integrated imaging 3D display system based on a superlens array.

[0020] Furthermore, the bracket is respectively provided with a first micro display screen and a second micro display screen which are parallel to the viewer's line of sight, a first super lens array is provided at a preset distance from the bottom end of the first micro display screen, a second super lens array is provided at a preset distance from the bottom end of the second micro display screen, and a first spectroscopic element and a second spectroscopic element are respectively provided at the ends of the first super lens array and the second super lens array which are away from the micro display screen.

[0021] Furthermore, the angle formed by the first beam splitter element, the second beam splitter element and the super lens array is 45°. The image source light emitted by the first micro display screen is modulated by the first super lens array and then transmitted to the right eye through the first beam splitter element. The image source light emitted by the second micro display screen is modulated by the second super lens array and then transmitted to the left eye through the second beam splitter element. The light from both sides is fused by the visual center of the human eye to construct a complete 3D object in the distance.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0023] The present invention provides a binocular near-eye integrated imaging 3D display system based on a superlens array. The adopted superlens array can perform sub-wavelength level light field regulation on the light field. Two superlens arrays are used to modulate the image source light with binocular parallax provided by two micro display screens to generate two 3D images with binocular parallax and depth information, so that the focus position of the observer's eyes and the convergence angle of the eyes are matched with the set 3D image generation depth, and the problem of mismatch between the focus position and the convergence angle is eliminated, thereby reducing the user's dizziness and visual fatigue after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of a binocular near-eye integrated imaging 3D display system based on a superlens array of the present invention.

[0025] Figure 2 Schematic diagram of a super lens array in one embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of light focusing after light irradiates the super lens array from bottom to top in one embodiment of the present invention.

[0027] Figure 4 This is a cross-sectional diagram in the xz direction of the light field of a single superlens in a superlens array under the incidence of light of different wavelengths in an embodiment of the present invention.

[0028] Figure 5 A schematic diagram of calculating the disparity of the central areas of two 2D images displayed by two micro display screens in an embodiment of the present invention.

[0029] Figure 6 A schematic diagram of a head mounted display device according to the present invention. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] Example 1

[0033] like Figure 1 As shown, the present invention provides a binocular near-eye integrated imaging 3D display system based on a superlens array, comprising: a first micro display screen 5 arranged in the field of view of a right eye 1, and a second micro display screen 6 arranged in the field of view of a left eye 2, a first super lens array 3 is arranged on the side of the first micro display screen 5 displaying an image, and a second super lens array 4 is arranged on the side of the second micro display screen 6 displaying an image; the first micro display screen 5 and the second micro display screen 6 are used to provide image source light with binocular parallax, and the first super lens array 3 and the second super lens array 4 are used to modulate the image source light with binocular parallax to generate two 3D images with binocular parallax and depth information.

[0034] It should be noted that the pixel emission spectrum of the selected micro display screen needs to be as narrow as possible to reduce the imaging blur caused by the lateral chromatic aberration of the super lens.

[0035] In a specific embodiment, the emission spectrum is narrowed by adding a narrow-band filter between the microdisplay screen and the superlens array, and the selected microdisplay screen adopts one of silicon-based liquid crystal (LCoS), liquid crystal display (LCD), digital micromirror device (DMD), digital light processing (DLP), silicon-based OLED, Micro LED, quantum dot display (QLED), electronic paper display (EPD), microelectromechanical system display (MEMS), laser display (Laser Display) and holographic display (Holographic Display).

[0036] like Figure 2 As shown, the first super lens array 3 and the second super lens array 4 have the same focal length, and are both composed of a plurality of super lenses 301 with the same size and focal length, wherein the size of the super lens 301 is an integer multiple of the pixel size of the first micro display screen 5 and the second micro display screen 6.

[0037] A first beam splitter element 8 is arranged between the first super lens array 3 and the right eye 1, and a second beam splitter element 9 is arranged between the second super lens array 4 and the left eye 2. The first beam splitter element 8 and the second beam splitter element 9 are used to fuse the reconstructed 3D image with the external ambient light, and to switch the display effects of augmented reality and virtual reality by adjusting the ratio of the 3D image light and the external light during the fusion process.

[0038] It should be noted that the two beam splitting elements are used to merge the reconstructed 3D image with the external ambient light to achieve an augmented reality effect. In this embodiment, the first beam splitting element 8 and the second beam splitting element 9 can be a beam splitting prism, a cubic beam splitter, a plate beam splitter, a polarization beam splitter, a beam splitter, a liquid crystal sheet, an electrochromic glass, etc.

[0039] The first super lens array 3 and the second super lens array 4 include Figure 3 The substrate layer 303 and the micro-nano structure layer 302 are shown, the material of the micro-nano structure layer 302 is ultraviolet curing glue doped with nanoparticles, the micro-nano structure is arranged on the substrate layer in a cylindrical structure, and the arrangement of the micro-nano structure meets the phase distribution of the super lens array.

[0040] It should be noted that different arrangements of micro-nano structures will cause the duty cycle of the micro-nano structures to change, which will in turn affect the difficulty of subsequent micro-nano processing and the optical performance of the designed super lens array, and needs to be selected according to the actual situation. If ultraviolet curing glue doped with nanoparticles is selected as the material of the micro-nano structure layer, the device can be made using a nanoimprint lithography process based on ultraviolet exposure, which is convenient for reducing production costs, but will have a negative impact on the optical performance of the super lens array; different doped nanoparticles will affect the optical performance of the super lens array under different colors of light, and need to be selected according to the actual situation.

[0041] In a specific embodiment, the arrangement of the micro-nano structure can be a periodic arrangement in one of the following ways: a tetragonal lattice, a hexagonal lattice, a twill, a triangular grid, a rhombus, etc. The material of the micro-nano structure layer includes ultraviolet curing glue doped with nanoparticles, such as silicon particles, amorphous silicon particles, titanium dioxide particles, zirconium dioxide particles, silicon carbide particles, gold particles, silver particles, quantum dots and other nanoparticles. The material of the micro-nano structure layer also includes silicon dioxide, silicon nitride, amorphous silicon, single crystal silicon, titanium dioxide, zirconium dioxide, etc.; the material of the substrate layer includes silicon dioxide, silicon nitride, amorphous silicon, titanium dioxide, etc. The materials that can be covered on the micro-nano structure layer are silicon dioxide, silicon nitride, amorphous silicon, single crystal silicon, titanium dioxide, zirconium dioxide, etc. Among them, when the micro-nano structure layer material is selected from silicon dioxide, silicon nitride, amorphous silicon, single crystal silicon, titanium dioxide, zirconium dioxide and other materials, the high-cost traditional photolithography process can be used to produce the superlens array, which has a positive effect on the optical performance of the superlens array; different materials will affect the optical performance of the superlens array under different colors of light, and need to be selected according to actual conditions.

[0042] The super lenses 301 are arranged periodically in the first super lens array 3 and the second super lens array 4, and all super lenses 301 satisfy the following phase distribution formula:

[0043]

[0044] Wherein, the center of the superlens 301 is taken as the origin coordinate, (x, y) represents the coordinate position from the center of the superlens 301, λ represents the wavelength of the incident light, f represents the focal length of the superlens 301, and C is the phase constant. In a specific embodiment, the wavelength λ is 532nm, the focal length f is 2.57mm, and the side length of the superlens is 460μm.

[0045] like Figure 3 As shown, the super lens array 3 is composed of nanometer-scale cylindrical micro-nano structures 302 of different sizes arranged on a silicon dioxide substrate 303 in a manner that satisfies the phase distribution of the lens array. In this embodiment, the period of the cylindrical structure is 400nm and the height is 500nm. When light with a wavelength of 532nm is incident vertically from the substrate surface, multiple focal points are generated at a position 2.57mm away from the micro-nano structure.

[0046] like Figure 4 As shown, the left column is the light intensity distribution of the xz section of the superlens measured in the experiment under the conditions of light of 457nm, 532nm, and 660nm wavelengths vertically incident on the superlens; its focal length is about 3.00mm, 2.59mm, and 2.07mm, respectively; the right column is the light intensity distribution of the xy section at the focus at different wavelengths, and its half-height width is about 2.66μm, 2.62μm, and 2.61μm, respectively.

[0047] It should be noted that the first micro-display screen 5 and the second micro-display screen 6 are used to display two integrated imaging image source images or image source dynamic images with binocular parallax. The image source light with binocular parallax provided by the first micro-display screen 5 and the second micro-display screen 6 is a 2D image generated by an integrated imaging algorithm. The integrated imaging algorithm controls the generation of the image source light according to the positions of the viewer's left and right eyes, the pupil distance of the two eyes, the depth of the displayed 3D object, the distance between the super-lens array and the screen, the focal cycle duty cycle of the super-lens array, the size of the screen pixels and the number of modulated pixels of a single super-lens.

[0048] The image source image needs to use an integrated imaging algorithm to generate two 2D source images with parallax information and depth information. The source image is composed of many element images with different perspectives, and the perspective of the element image corresponds one-to-one to the perspective of each super lens in the lens array.

[0049] like Figure 5 As shown, the generated 2D image satisfies the following formula as the image source light:

[0050]

[0051] Among them, pa is the parallax of the central area of ​​the two 2D images displayed by the two micro screens, corresponding to the difference in the field of view of the left and right eyes, L is the binocular pupil distance of the viewer, depth is the distance between the imaging surface and the lens, gap is the distance between the screen and the super lens array, and pp is the pixel size of the micro display screen. In a specific embodiment, the size of gap is selected to be 2.47mm, and the size of pp is 4.6μm.

[0052] After the light diverged from the image source light enters the right eye 1 or the left eye 2, a virtual 3D object will be reconstructed at the same depth and position in the distance. When both eyes observe separately, 3D images under different perspectives are obtained. When both eyes observe together, a complete 3D object is reconstructed in the distance.

[0053] According to the above technical features, the present invention provides a binocular near-eye integrated imaging 3D display system based on a superlens array, which uses two superlens arrays to modulate the image source light with binocular parallax provided by two micro screens to generate two 3D images with binocular parallax and depth information, so that the focusing position of the observer's eyes and the convergence angle of the eyes are matched with the set 3D image generation depth.

[0054] Compared with the common binocular 2D head-mounted display devices on the market, the binocular near-eye integrated imaging 3D display system based on the superlens array provided by the present invention enables the viewer's binocular focus position to change with the depth of the generated 3D content, eliminating the problem of mismatch between the focus position and the convergence angle, and reducing the user's dizziness and visual fatigue after long-term use.

[0055] Compared with monocular 3D display devices, the binocular near-eye integrated imaging 3D display system based on the superlens array provided by the present invention enables the viewer's binocular convergence adjustment angle to change with the depth of the generated 3D content, bringing users a more realistic and accurate sense of spatial stereoscopic feeling, which is more in line with the natural observation habits of the human body.

[0056] Compared with the previous near-eye integrated imaging 3D display system based on microlens array, the present invention adopts two superlens arrays to modulate the image source light of two micro screens. Compared with the microlens array that realizes optical regulation based on the thickness of the material at different positions, the superlens array sample is optically regulated by the nanocolumns artificially designed on its surface, so that the weight and thickness of the device are approximately equal to the weight and thickness of the substrate glass sheet, so the scheme has the characteristics of low weight and low thickness; at the same time, due to the artificial design of the nanocolumns, the nanocolumns can fill the sample working area and perform sub-wavelength level light field regulation on the light field, so the scheme has the characteristics of high duty cycle, resolution close to the optical diffraction limit, and high degree of freedom of light field regulation; finally, since the production of the superlens array is suitable for nanoimprint lithography technology, the scheme has the characteristics of low price and high production capacity.

[0057] Example 2

[0058] like Figure 6 As shown, the present invention also provides a head-mounted display device, comprising: a bracket (10), a connecting piece 11, wherein the bracket (10) is mounted on glasses via the connecting piece 11, and the bracket (10) is provided with the binocular near-eye integrated imaging 3D display system based on a superlens array.

[0059] The support (10) is provided with a first micro display screen 5 and a second micro display screen 6 perpendicular to the eyeglass lenses, respectively; a first super lens array 3 is provided at a preset distance from the bottom of the first micro display screen 5; a second super lens array 4 is provided at a preset distance from the bottom of the second micro display screen 6; and a first beam splitting element 8 and a second beam splitting element 9 are provided at the ends of the first super lens array 3 and the second super lens array 4 away from the micro display screens, respectively.

[0060] The angle formed by the first beam splitter element 8, the second beam splitter element 9 and the super lens array is 45°. The image source light emitted by the first micro display screen 5 is modulated by the first super lens array 3 and then transmitted to the right eye 1 through the first beam splitter element 8. The image source light emitted by the second micro display screen 6 is modulated by the second super lens array 4 and then transmitted to the left eye 2 through the second beam splitter element 9. The light from both sides is fused by the visual center of the human eye to construct a complete 3D object in the distance.

[0061] In this embodiment, the bracket (10), the connecting member 11 and a binocular near-eye integrated imaging 3D display system based on a super lens array mounted on the bracket (10) can be fixed on the eyeglass frame by a 3D printed frame, which is convenient for the observer to wear. The same 3D printed frame is present above the left and right eyes of the eyeglass frame, which is used to fix the micro screen, the lens array, and the beam splitter; when watching, the micro screens above the left and right eyes display two source images with binocular parallax. After the corresponding super lens array modulation and the reflection of the beam splitter, the left and right eyes will observe different 3D object virtual images with binocular parallax. After the synthesis of the human visual center, a complete 3D object can be presented in the distance.

[0062] In a specific embodiment, in combination Figure 1 and Figure 6 Elaborate on the specific imaging process, such as Figure 6 As shown, the imaging process is as follows: Figure 1As shown, taking the imaging process corresponding to the left eye 2 as an example, the second micro-display screen 6 displays the source 2D picture corresponding to the left eye perspective; the source 2D picture is composed of element images with the same number of super lenses 301 in the second super lens array 4, and each element image corresponds to the required generation of the 3D object, and part of the information required to be recorded at different positions under the left eye perspective; a single super lens 301 in the second super lens array 4 corresponds one-to-one to each element image displayed by the second micro-display screen 6; the super lens 301 modulates the light of the corresponding element image into divergent light, which enters the left eye 2 after being reflected by the second beam splitting element 9; the left eye 2 can see the front direction, and the divergent light is virtually converged in the distance to reconstruct the 3D object.

[0063] Similarly, if Figure 1 As shown, the right eye 1 can also see the 3D object reconstructed in the distance from the right eye's perspective. The light entering the right eye 1 is the first micro display screen 5, which displays the image source light emitted by the source 2D picture corresponding to the perspective of the right eye 1. After being modulated by the first super lens array 3, it is reflected by the first spectroscopic element 8.

[0064] In this embodiment, 3D objects are reconstructed in front of both the left eye and the right eye, and the focusing depths of the left eye and the right eye are the depth positions of the actually generated virtual 3D objects; the 3D objects seen by the left eye and the right eye will have binocular parallax, and the convergence rotation angle of the two eyes will match the depth of the reconstructed 3D object, and the visual axes of the two eyes will point to the reconstructed 3D object. Since the focusing positions of the two eyes match the convergence rotation angles of the two eyes, there is no convergence adjustment conflict problem, which will give the viewer a more comfortable viewing experience and a more accurate 3D sense.

[0065] In addition, compared with the near-eye integrated imaging 3D display system using existing lens arrays, such as microlens arrays, the binocular near-eye integrated imaging 3D display system based on the superlens array and its head-mounted display device also have the advantages of light weight, thin thickness, array duty cycle up to 100%, high degree of freedom in light field control, lower price and high production capacity.

[0066] Example 3

[0067] Based on the above embodiment 1, combined with Figure 2-Figure 4 This embodiment describes in detail the structure of the superlens array of the present invention and the light intensity distribution of the lens output light field cross section at different wavelengths.

[0068] like Figure 2 As shown, the first super lens array 3 and the second super lens array 4 are composed of a plurality of single super lenses 301 with the same focal length, arranged in the form of a tetragonal lattice. Figure 3As shown, the first super lens array 3 and the second super lens array 4 are composed of nanometer-scale cylindrical micro-nano structures 302 of different sizes on a silicon dioxide substrate 303, arranged in a manner that satisfies the phase distribution of the lens array. In this embodiment, the period of the cylindrical structure is 400nm and the height is 500nm. When light with a wavelength of 532nm is vertically incident from the substrate surface, multiple focal points are generated at a position 2.57mm away from the micro-nano structure.

[0069] Light with wavelengths of 457nm, 532nm, and 660nm is incident vertically on the metalens to obtain the following Figure 4 The schematic diagram shown can measure the light intensity distribution of the xz section of the metalens light field; its focal lengths are respectively about 3.00mm, 2.59mm, and 2.07mm; the right column is the light intensity distribution of the xy section at the focus at different wavelengths, and its half-height width is approximately 2.66μm, 2.62μm, and 2.61μm, respectively.

[0070] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. The icons describing the structural positional relationships in the accompanying drawings are only used for exemplary purposes and are not to be construed as limiting the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and is not possible to list all the embodiments here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A binocular near-eye integrated imaging 3D display system based on a superlens array, characterized in that: The invention comprises: a first micro display screen (5) arranged in the field of vision of a right eye (1), and a second micro display screen (6) arranged in the field of vision of a left eye (2); a first super lens array (3) is arranged on the side of the first micro display screen (5) displaying an image, and a second super lens array (4) is arranged on the side of the second micro display screen (6) displaying an image; the first micro display screen (5) and the second micro display screen (6) are used to provide image source light with binocular parallax, and the first super lens array (3) and the second super lens array (4) are used to modulate the image source light with binocular parallax to generate two 3D images with binocular parallax and depth information.

2. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 1, characterized in that: The first super lens array (3) and the second super lens array (4) have the same focal length and are both composed of a plurality of super lenses (301) having the same size and focal length, wherein the size of the super lenses (301) is an integer multiple of the pixel size of the first micro display screen (5) and the second micro display screen (6).

3. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 2, characterized in that: A first light splitting element (8) is arranged between the first super lens array (3) and the right eye (1), and a second light splitting element (9) is arranged between the second super lens array (4) and the left eye (2). The first light splitting element (8) and the second light splitting element (9) are used to fuse the reconstructed 3D image with the external ambient light, and to switch the display effect between augmented reality and virtual reality by adjusting the ratio of the 3D image light and the external light during the fusion process.

4. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 2, characterized in that: The first superlens array (3) and the second superlens array (4) comprise a substrate layer and a micro-nano structure layer, the material of the micro-nano structure layer is ultraviolet curing glue doped with nanoparticles, the micro-nano structure is arranged on the substrate layer in a cylindrical structure, and the arrangement of the micro-nano structure satisfies the phase distribution of the superlens array.

5. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 4, characterized in that: The metalenses (301) are periodically arranged in the first metalenses array (3) and the second metalenses array (4), and all the metalenses (301) satisfy the following phase distribution formula: Among them, the center of the super lens is taken as the origin coordinate, (x, y) represents the coordinate position from the center of the super lens, λ represents the wavelength of the incident light, f represents the focal length of the super lens, and C is the phase constant.

6. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 5, characterized in that: The image source light with binocular parallax provided by the first micro display screen (5) and the second micro display screen (6) is a 2D image generated by an integrated imaging algorithm, wherein the integrated imaging algorithm controls the generation of the image source light according to the positions of the left and right eyes of the viewer, the pupil distance of the two eyes, the depth of the displayed 3D object, the distance between the metalens array and the screen, the focal cycle duty cycle of the metalens array, the size of the screen pixels, and the number of modulated pixels of a single metalens.

7. The binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 6, characterized in that: The generated 2D image satisfies the following formula as the image source light: Wherein, pa is the parallax of the central areas of the two 2D images displayed on the two micro screens, corresponding to the difference in the field of view of the left and right eyes, L is the binocular pupil distance of the viewer, depth is the distance between the imaging surface and the super lens array, gap is the distance between the screen and the super lens array, and pp is the pixel size of the micro display screen; after the light emitted by the image source light enters the right eye (1) or the left eye (2), a virtual 3D object is reconstructed at the same depth and position in the distance, and 3D images under different viewing angles are obtained by observing with both eyes separately, and a complete 3D object is reconstructed in the distance when observing with both eyes together.

8. A head mounted display device, characterized in that: include: A bracket (10) and a connecting piece (11), wherein the bracket (10) is mounted on the glasses via the connecting piece (11), and the bracket (10) is provided with a binocular near-eye integrated imaging 3D display system based on a superlens array as described in any one of claims 1 to 7.

9. The head mounted display device according to claim 8, characterized in that: The support (10) is provided with a first micro display screen (5) and a second micro display screen (6) which are parallel to the viewer's line of sight, respectively; a first super lens array (3) is provided at a preset distance from the bottom of the first micro display screen (5); a second super lens array (4) is provided at a preset distance from the bottom of the second micro display screen (6); and a first light splitting element (8) and a second light splitting element (9) are provided at the ends of the first super lens array (3) and the second super lens array (4) which are away from the micro display screens, respectively.

10. The head mounted display device according to claim 9, characterized in that: The angle formed by the first beam splitter element (8) and the second beam splitter element (9) and the super lens array is 45 degrees. The image source light emitted by the first micro display screen (5) is modulated by the first super lens array (3) and then transmitted to the right eye (1) through the first beam splitter element (8). The image source light emitted by the second micro display screen (6) is modulated by the second super lens array (4) and then transmitted to the left eye (2) through the second beam splitter element (9). The light from both sides is fused by the visual center of the human eye to construct a complete 3D object in the distance.

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