CN119165660A - A binocular near-eye integrated imaging 3D display system based on superlens array - Google Patents
A binocular near-eye integrated imaging 3D display system based on superlens array Download PDFInfo
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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Abstract
The application 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 view and a second micro-display screen arranged in a left eye view, wherein the first micro-display screen is provided with the first super-lens array on one side of an image displayed by the first micro-display screen, the second micro-display screen is provided with the second super-lens array on one side of the image displayed by the second micro-display screen, the first micro-display screen and the second micro-display screen are used for providing image source light with binocular parallax, and the first micro-lens array and the second micro-lens array are used for modulating the image source light with binocular parallax to generate two 3D images with binocular parallax and depth information. Compared with the prior art, the application can simultaneously realize the adjustment of the focusing positions and the convergence angles of the left eye and the right eye of the viewer, brings more real and accurate spatial third dimension for the user, and is more in line with the natural observation habit of the human body.
Description
Technical Field
The invention relates to the technical field of micro-nano optics and optical imaging, in particular to a binocular near-to-eye integrated imaging 3D display system based on a superlens array.
Background
With the benefit of the recent increase in pixel density of the micro-screen, the attention of the head-mounted display device is getting more and more hot in academia and business industries. In real life, due to the convergence of eyes of a human being, the rotating included angle between the eyes can be changed according to the actual depth of the observation position, and meanwhile, the focusing position of the eyes can be adjusted along with the depth of an object to be observed. At present, most of the head-mounted display devices on the market realize the effect of a 3D picture by only utilizing the principle of binocular parallax when performing near-eye display, and the rotating included angle between the eyes of a user can be continuously changed along with the imaging depth of the 3D picture due to the convergence effect. But this results in the user's eyes always being focused on the screen surface, since both eyes need to be focused on the device screen surface to see the displayed picture clearly. At this time, there is a convergence adjustment conflict between the rotation angle of the eyes which changes with time due to the convergence effect and the focus position where the eyes are fixed all the time, which causes discomfort such as dizziness to the user.
The integrated imaging light field display is a true 3D display technology, so that the focusing position of eyes of an observer is not fixed on the surface of a miniature screen any more, but is changed along with the actual generation position of a 3D image at any time, thereby being more in line with the natural viewing habit of human eyes and being more comfortable. Which typically use an array of microlenses. However, the existing microlens array device is large in volume, high in weight and capable of achieving surface relief, so that the existing microlens array device is not beneficial to combination with other devices, and a high-quality integrated imaging 3D display effect cannot be achieved.
The prior art discloses a near-to-eye integrated imaging 3D display system and a head-mounted display device based on a super-lens array, wherein the near-to-eye integrated imaging 3D display system comprises a micro-display screen for displaying an image source and providing image source light and the super-lens array, the super-lens array is arranged on one side of the micro-display screen for displaying an image, and the super-lens array is used for modulating the image source light of the micro-display screen so that the image source light reconstructs a 3D image on different depth planes. The disadvantage of this solution is that only the adjustment of the single-eye focus position of the viewer can be achieved, and the binocular vergence adjustment angle of the viewer cannot be adjusted.
To this end, in combination with the above needs and the drawbacks of the prior art, the present application proposes a binocular near-to-eye integrated imaging 3D display system based on a superlens array.
Disclosure of Invention
The invention provides a binocular near-to-eye integrated imaging 3D display system based on a superlens array, which matches the binocular focusing position, the binocular convergence angle and the depth position for generating 3D content of a viewer, thereby bringing more real and accurate spatial third dimension for the user and more conforming to the natural observation habit of a human body.
The primary purpose of the invention is to solve the technical problems, and the technical scheme of the invention is as follows:
The invention provides 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 view and a second micro-display screen arranged in a left eye view, wherein the first micro-display screen is provided with the first super-lens array on one side of an image displayed by the first micro-display screen, the second micro-display screen is provided with the second super-lens array on one side of the image displayed by the second micro-display screen, 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 to generate two 3D images with binocular parallax and depth information.
Further, the first superlens array and the second superlens array have the same focal length and are each composed of a plurality of superlenses having the same size and focal length, wherein the size of the superlenses is an integer multiple of the pixel size of the first micro display screen and the second micro display screen.
Further, a first light splitting element is arranged between the first superlens array and the right eye, a second light splitting element is arranged between the second superlens array and the left eye, the first light splitting element and the second light splitting element are used for fusing the reconstructed 3D image with external environment light, and the display effect switching between augmented reality and virtual reality is performed by adjusting the proportion of the 3D image light to the external light in the fusion process.
Further, the first superlens array and the second superlens array comprise a substrate layer and a micro-nano structure layer, the micro-nano structure layer is made of ultraviolet curing glue doped with nano particles, the micro-nano structure is arranged on the substrate layer in a cylindrical structure, and the arrangement mode of the micro-nano structure meets the phase distribution of the superlens array.
Further, the superlenses are periodically arranged in the first superlens array and the second superlens array, and all superlenses meet the following phase distribution formula:
wherein, (x, y) represents the coordinate position from the center of the superlens, λ represents the wavelength of incident light, f represents the focal length of the superlens, and C is the phase constant.
Further, the image source light with binocular parallax provided by the first micro display screen and the second micro display screen is a 2D image generated through an integrated imaging algorithm, and the integrated imaging algorithm controls the generated image source light according to the position of left eyes and right eyes of a viewer, the dual-purpose pupil distance, the depth of a displayed 3D object, the distance between a super lens array and a screen, the focal length period duty ratio of the super lens array, the size of a screen pixel and the number of single super lens modulation pixels.
Further, the generated 2D image satisfies the following formula as image source light:
The parallax of the central areas of two 2D images displayed by the two micro screens corresponds to the difference value of the visual field ranges of the left eye and the right eye, L is the binocular pupil distance of a viewer, depth is the distance between an imaging surface and a lens, gap is the distance between a screen and a super lens array, pp is the pixel size of the micro display screen, after light rays emitted by image source light enter the right eye or the left eye, a virtual 3D object is reconstructed at the same depth and position at a distance, the 3D images at different visual angles are obtained by independent observation of the two eyes, and a complete 3D object is obtained by reconstruction at the distance by common observation of the two eyes.
The invention provides head-mounted display equipment, which comprises a bracket and a connecting piece, wherein the bracket is arranged on glasses through the connecting piece, and the bracket is provided with the binocular near-to-eye integrated imaging 3D display system based on a super lens array.
Further, a first micro display screen and a second micro display screen which are parallel to the sight line of a viewer are respectively arranged on the support, a first super lens array is arranged at a preset distance from the bottom end of the first micro display screen, a second super lens array is arranged at a preset distance from the bottom end of the second micro display screen, and a first light splitting element and a second light splitting element are respectively arranged at one ends, far away from the micro display screen, of the first super lens array and the second super lens array.
Further, an included angle formed by the first light splitting element and the second light splitting element and the super lens array is 45 degrees, 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 light splitting element, image source light Jing Dier emitted by the second micro display screen is modulated by the super lens array and then transmitted to the left eye through the second light splitting element, and light rays at two sides are fused through visual centers of human eyes to construct a complete 3D object at a far place.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
The invention provides a binocular near-to-eye integrated imaging 3D display system based on a superlens array, which is characterized in that the superlens array can be used for carrying out light field regulation and control on a sub-wavelength level of a light field, two superlens arrays are used for modulating image source light with binocular parallax provided by two micro display screens, two 3D images with binocular parallax and depth information are generated, the binocular focusing position of an observer and the binocular convergence angle are matched with the set 3D image generation depth, meanwhile, the problem of mismatching of the focusing position and the convergence angle is also solved, and the problems of dizziness of a user, visual fatigue after long-time use and the like are reduced.
Drawings
Fig. 1 is a schematic diagram of a binocular near-eye integrated imaging 3D display system based on a superlens array according to the present invention.
FIG. 2 is a schematic diagram of a superlens array according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing focusing of light after the light irradiates the superlens array from bottom to top in an embodiment of the present invention.
FIG. 4 is a cross-sectional view of the optical field xz direction at different wavelengths of light incident on a single superlens in a superlens array according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating parallax of central areas of two 2D images displayed on two micro-display screens according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a head-mounted display device according to the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present application can be understood in detail, a more particular description of the application, briefly summarized below, may be had by reference to the appended drawings. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
Example 1
The invention provides a binocular near-to-eye integrated imaging 3D display system based on a super-lens array, which comprises a first micro-display screen 5 arranged in the visual field of a right eye 1 and a second micro-display screen 6 arranged in the visual field of a left eye 2, wherein the first super-lens array 3 is arranged on one side of the first micro-display screen 5 for displaying images, and the second super-lens array 4 is arranged on one side of the second micro-display screen 6 for displaying images, the first micro-display screen 5 and the second micro-display screen 6 are used for providing image source light with binocular parallax, and the first super-lens array 3 and the second super-lens array 4 are used for modulating the image source light with binocular parallax to generate two 3D images with binocular parallax and depth information.
It should be noted that, the pixel luminous lines of the selected micro display screen should be as narrow as possible to reduce the imaging blur caused by the lateral chromatic aberration of the superlens.
In a specific embodiment, the emission lines are narrowed by adding a narrow band filter between the Micro display screen and the superlens array, and the selected Micro display screen employs one of several types including liquid crystal on silicon (LCoS), liquid Crystal Display (LCD), digital Micromirror Device (DMD), digital Light Processing (DLP), OLED on silicon, micro LED, quantum dot display (QLED), electronic Paper Display (EPD), microelectromechanical system display (MEMS), laser display (LASER DISPLAY), and holographic display (Holographic Display).
As shown in fig. 2, the first superlens array 3 and the second superlens array 4 have the same focal length, and each of them is composed of a plurality of superlenses 301 having the same size and focal length, wherein the size of the superlenses 301 is an integer multiple of the pixel size of the first micro display 5 and the second micro display 6.
The first super lens array 3 and the right eye 1 are provided with a first light splitting element 8 therebetween, the second super lens array 4 and the left eye 2 are provided with a second light splitting element 9 therebetween, the first light splitting element 8 and the second light splitting element 9 are used for fusing the reconstructed 3D image with external environment light, and the display effect switching between the augmented reality and the virtual reality is executed by adjusting the proportion of the 3D image light and the external light in the fusion process.
It should be noted that the two light splitting elements are used for fusing the reconstructed 3D image with external ambient light, so as to achieve the effect of augmented reality. In this embodiment, the first light-splitting element 8 and the second light-splitting element 9 may be a light-splitting prism, a cube beam splitter, a plate beam splitter, a polarizing beam splitter, a light-splitting sheet, a liquid crystal sheet, electrochromic glass, or the like.
The first superlens array 3 and the second superlens array 4 comprise a substrate layer 303 and a micro-nano structure layer 302 as shown in fig. 3, the micro-nano structure layer 302 is made of ultraviolet curing glue doped with nano particles, the micro-nano structure is arranged on the substrate layer in a cylindrical structure, and the arrangement mode of the micro-nano structure meets the phase distribution of the superlens array.
It should be noted that, different arrangement modes of the micro-nano structure can cause the change of the duty ratio of the micro-nano structure, thereby affecting the subsequent micro-nano processing difficulty and the optical performance of the designed superlens array, and the selection needs to be performed according to practical situations. The ultraviolet curing glue doped with nano particles is selected as a micro-nano structural layer material, a nano imprinting lithography process based on ultraviolet exposure can be used for manufacturing devices, so that the production cost is reduced, the optical performance of the superlens array is negatively influenced, and the optical performance of the superlens array under different color illumination is influenced by different doped nano particles and needs to be selected according to actual conditions.
In a specific embodiment, the micro-nano structure may be arranged in a periodic manner by one of tetragonal lattice, hexagonal lattice, twill, triangular lattice, diamond, and the like. The micro-nano structure layer comprises ultraviolet curing glue doped with nano particles, wherein the nano particles comprise silicon particles, amorphous silicon particles, titanium dioxide particles, zirconium dioxide particles, silicon carbide particles, gold particles, silver particles, quantum dots and other nano particles. The micro-nano structure layer also comprises silicon dioxide, silicon nitride, amorphous silicon, monocrystalline silicon, titanium dioxide, zirconium dioxide and the like, and the substrate layer comprises silicon dioxide, silicon nitride, amorphous silicon, titanium dioxide and the like. The micro-nano structure layer can be covered with silicon dioxide, silicon nitride, amorphous silicon, monocrystalline silicon, titanium dioxide, zirconium dioxide and the like. When the micro-nano structure layer material is selected from silicon dioxide, silicon nitride, amorphous silicon, monocrystalline silicon, titanium dioxide, zirconium dioxide and the like, the super-lens array can be manufactured by using a high-cost traditional photoetching process, the optical performance of the super-lens array is positively influenced, and different materials can influence the optical performance of the super-lens array under different colors of illumination and need to be selected according to actual conditions.
The superlenses 301 are periodically arranged in the first superlens array 3 and the second superlens array 4, and all the superlenses 301 satisfy the following phase distribution formula:
Where, (x, y) represents the coordinate position from the center of the superlens 301 with the center of the superlens 301 as the origin coordinate, λ represents the wavelength of 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 superlens has a side length of 460 μm.
As shown in fig. 3, the superlens array 3 is formed by arranging nano-scale cylindrical micro-nano structures 302 with different sizes on a silicon dioxide substrate 303 in a manner meeting the phase distribution of the lens array, in this embodiment, the period of the cylindrical structures is 400nm, the height is 500nm, and when light with the wavelength of 532nm is vertically incident from the substrate surface, a plurality of focuses are generated at positions 2.57mm away from the micro-nano structures.
As shown in FIG. 4, the left column shows the intensity distribution of the xz section of the superlens measured in experiments under the condition that light with wavelengths of 457nm,532nm and 660nm is vertically incident to the superlens, the focal lengths of the superlens are respectively at the positions of about 3.00mm,2.59mm and 2.07mm, and the right column shows the intensity distribution of the xy section at the focal point with the different wavelengths, and the half widths of the superlens are respectively about 2.66 mu m,2.62 mu m and 2.61 mu m.
It should be noted that, the first micro display 5 and the second micro display 6 are configured 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 5 and the second micro display 6 is a 2D image generated by an integrated imaging algorithm, and the integrated imaging algorithm controls the generated image source light according to the position of left and right eyes of a viewer, a dual-purpose pupil distance, a depth of a displayed 3D object, a distance between a superlens array and a screen, a focal length period duty ratio of the superlens array, a size of a screen pixel, and a number of single superlens modulation pixels.
The image source map is characterized in that two 2D film source images with parallax information and depth information are generated by utilizing an integrated imaging algorithm, the film source images are formed by arranging a plurality of element images with different visual angles, and the visual angles of the element images are in one-to-one correspondence with the visual angles of each superlens in the lens array.
As shown in fig. 5, the generated 2D image satisfies the following formula as image source light:
Wherein pa is parallax of central areas of two 2D images displayed by the two micro-screens, corresponds to a difference value of a left eye field and a right eye field, L is binocular pupil distance of a viewer, depth is distance from an imaging surface to a lens, gap is distance from a screen to a super lens array, and pp is 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 4.6 μm.
After the light rays emitted by the image source light enter the right eye 1 or the left eye 2, a virtual 3D object is reconstructed at the same depth and position at a distance, 3D images at different visual angles are obtained by independent observation of two eyes, and a complete 3D object is reconstructed at the distance by simultaneous observation of the two eyes.
According to the technical characteristics, the invention provides a binocular near-to-eye integrated imaging 3D display system based on a super lens array, which utilizes two super lens arrays to modulate 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 binocular focusing position of an observer and the binocular convergence angle are matched with the set 3D image generation depth.
Compared with the common binocular 2D head-mounted display equipment in the market, the binocular near-to-eye integrated imaging 3D display system based on the super lens array provided by the invention enables the binocular focusing position of a viewer to change along with the depth change of the generated 3D content, eliminates the problem of mismatching of the focusing position and the convergence angle, and reduces the problems of dizziness, visual fatigue and the like of the user after long-time use.
Compared with monocular 3D display equipment, the binocular near-to-eye integrated imaging 3D display system based on the superlens array provided by the invention enables the binocular convergence adjusting angle of a viewer to change along with the depth change of the generated 3D content, brings more real and accurate spatial third dimension for the user, and accords with the natural observation habit of human body.
Compared with the prior near-to-eye integrated imaging 3D display system based on the micro lens array, the micro lens array is used for modulating the image source light of two micro screens by two super lens arrays, optical regulation and control are realized by the micro lens array based on the thicknesses of different positions of materials, the nano lens array sample is subjected to optical regulation and control by the nano columns artificially designed on the surface of the micro lens array sample, so that the weight and the thickness of a device are approximately equal to the weight and the thickness of a substrate glass sheet, the scheme has the characteristics of low weight and low thickness, meanwhile, the nano columns can be filled in a sample working area to perform optical field regulation and control of sub-wavelength level on an optical field due to the artificial design of the nano columns, the scheme has the characteristics of high duty ratio, resolution close to an optical diffraction limit, high optical field regulation and control freedom degree and the like, and finally, the scheme has the characteristics of low price, high productivity and the like due to the fact that the manufacturing of the super lens array is suitable for a nano imprint lithography technology.
Example 2
As shown in fig. 6, the invention further provides a head-mounted display device, which comprises a support (10) and a connecting piece 11, wherein the support (10) is arranged on the glasses through the connecting piece 11, and the support (10) is provided with the binocular near-to-eye integrated imaging 3D display system based on the super lens array.
The micro-display device comprises a bracket (10), wherein a first micro-display screen 5 and a second micro-display screen 6 which are perpendicular to glasses lenses are respectively arranged on the bracket, a first super-lens array 3 is arranged at a preset distance away from the bottom end of the first micro-display screen 5, a second super-lens array 4 is arranged at a preset distance away from the bottom end of the second micro-display screen 6, and a first light-splitting element 8 and a second light-splitting element 9 are respectively arranged at one ends, far away from the micro-display screens, of the first super-lens array 3 and the second super-lens array 4.
The included angle formed by the first light splitting element 8 and the second light splitting element 9 and the superlens array is 45 degrees, the image source light emitted by the first micro display screen 5 is modulated by the first superlens array 3, then transmitted to the right eye 1 through the first light splitting element 8, the image source light Jing Dier emitted by the second micro display screen 6 is modulated by the superlens array 4, then transmitted to the left eye 2 through the second light splitting element 9, and the light rays on two sides are fused through the visual center of human eyes to construct a complete 3D object at a far place.
In this embodiment, the support (10), the connecting piece 11 and a binocular near-to-eye integrated imaging 3D display system based on the superlens array mounted on the support (10) can be fixed on the glasses frame by the 3D printing frame, so that the observer can wear the experience. The same 3D printing frame is arranged above the left eye and the right eye of the eye frame and is used for fixing a micro screen, a lens array and a light splitting sheet; when the three-dimensional object is watched, the micro screen above the left eye and the right eye displays two film source pictures with binocular parallax, different 3D object virtual images with binocular parallax can be observed by the left eye and the right eye through corresponding super lens array modulation and reflection of a beam splitter, and a complete 3D object can be displayed in a distant place through synthesis of human visual centers.
In a specific embodiment, a specific imaging process is described in detail with reference to fig. 1 and 6, and as shown in fig. 6, the imaging process is as follows, taking the imaging process corresponding to the left eye 2 as an example as shown in fig. 1, the second micro display 6 displays a film source 2D picture corresponding to the left eye visual angle, the film source 2D picture is composed of element images with the same number as that of the superlenses 301 in the second superlens array 4, each element image corresponds to a 3D object to be generated, partial information to be recorded at different positions under the left eye visual angle is required, a single superlens 301 in the second superlens array 4 corresponds to each element image displayed by the second micro display 6 one by one, the superlens 301 modulates light rays corresponding to the element images into divergent light rays, the divergent light rays enter the left eye 2 after being reflected by the second light splitting element 9, the left eye 2 can see a 3D object reconstructed by virtual convergence of the divergent light rays in the front direction in a distant place.
Similarly, as shown in fig. 1, the right eye 1 can also see the 3D object reconstructed in the distant place and under the right eye viewing angle, the light entering the right eye 1 is the first micro display 5, and the image source light emitted by the film source 2D picture corresponding to the right eye 1 viewing angle is reflected by the first light splitting element 8 after being modulated by the first superlens array 3.
In the embodiment, the 3D object is reconstructed in front of the left eye and the right eye, the focusing depth of the left eye and the focusing depth of the right eye are depth positions of the virtual 3D object actually generated, binocular parallax exists in the 3D object seen by the left eye and the right eye, the convergence rotation angles of the two eyes are matched with the depth of the reconstructed 3D object, the binocular viewing axes point to the reconstructed 3D object, and as the focusing positions of the two eyes are matched with the convergence rotation angles of the two eyes, the convergence adjustment conflict problem does not exist, and more comfortable viewing experience and more accurate 3D feel are provided for a viewer.
In addition, compared with the existing lens array, such as a near-eye integrated imaging 3D display system of a micro lens array, the binocular near-eye integrated imaging 3D display system based on the super lens array and the head-mounted display device thereof also have the advantages of light weight, thin thickness, array duty ratio up to 100%, high light field regulation and control degree of freedom, lower price and high productivity.
Example 3
Based on the above embodiment 1, the configuration of the superlens array of the present invention and the light intensity distribution of the lens emergent light field section at different wavelengths are described in detail with reference to fig. 2 to 4.
As shown in fig. 2, the first superlens array 3 and the second superlens array 4 are formed by arranging a plurality of single superlenses 301 of the same focal length in a tetragonal lattice. In a specific embodiment, as shown in fig. 3, the first superlens array 3 and the second superlens array 4 are formed by arranging nano-scale cylindrical micro-nano structures 302 with different sizes on a silicon dioxide substrate 303 in a manner meeting the phase distribution of the lens arrays, and in this embodiment, the period of the cylindrical structures is 400nm, the height is 500nm, and when light with the wavelength of 532nm is perpendicularly incident from the substrate surface, a plurality of focuses are generated at positions 2.57mm away from the micro-nano structures.
Light with wavelengths of 457nm,532nm and 660nm is vertically incident into the superlens to obtain a schematic diagram shown in fig. 4, light intensity distribution of the xz section of the light field of the superlens can be measured, the focal lengths of the light intensity distribution are respectively at the positions of about 3.00mm,2.59mm and 2.07mm, the light intensity distribution of the xy section at the focal point is in a right column at different wavelengths, and the half-width of the light intensity distribution is respectively about 2.66 mu m,2.62 mu m and 2.61 mu m.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. The drawings are for illustrative purposes only and are not to be construed as limiting the invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The binocular near-to-eye integrated imaging 3D display system based on the super-lens array is characterized by comprising a first micro-display screen (5) arranged in the view field of a right eye (1) and a second micro-display screen (6) arranged in the view field of a left eye (2), wherein a first super-lens array (3) is arranged on one side of the first micro-display screen (5) for displaying an image, a second super-lens array (4) is arranged on one side of the second micro-display screen (6) for displaying the image, the first micro-display screen (5) and the second micro-display screen (6) are used for providing image source light with binocular parallax, and the first super-lens array (3) and the second super-lens array (4) are used for modulating the image source light with the binocular parallax to generate two 3D images with the binocular parallax and depth information.
2. A binocular near-to-eye integrated imaging 3D display system based on a superlens array according to claim 1, characterized in that the first superlens array (3) and the second superlens array (4) have the same focal length and are each composed of several superlenses (301) having the same size and focal length, wherein the dimensions of the superlenses (301) are integer multiples of the pixel size of the first micro display screen (5) and the second micro display screen (6).
3. The binocular near-to-eye integrated imaging 3D display system based on the superlens array according to claim 2, characterized in that a first light splitting element (8) is arranged between the first superlens array (3) and the right eye (1), a second light splitting element (9) is arranged between the second superlens array (4) and the left eye (2), the first light splitting element (8) and the second light splitting element (9) are used for fusing the reconstructed 3D image with external environment light, and the display effect switching of augmented reality and virtual reality is performed by adjusting the proportion of the 3D image light to the external light in the fusion process.
4. A binocular near-to-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 structured layer, the material of the micro-nano structured layer is uv curable glue doped with nano particles, the micro-nano structures are arranged on the substrate layer in a cylindrical configuration, and the arrangement of the micro-nano structures satisfies the phase distribution of the superlens array.
5. A binocular near-eye integrated imaging 3D display system based on a superlens array according to claim 4, characterized in that the superlenses (301) are arranged periodically within the first superlens array (3) and the second superlens array (4), all superlenses (301) satisfying the following phase distribution formula:
wherein, (x, y) represents the coordinate position from the center of the superlens, λ represents the wavelength of incident light, f represents the focal length of the superlens, and C is the phase constant.
6. The binocular near-eye integrated imaging 3D display system based on the super lens array according to claim 5, wherein 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 through an integrated imaging algorithm, and the integrated imaging algorithm controls the generated image source light according to the position of left and right eyes of a viewer, a dual-purpose pupil distance, a depth of a displayed 3D object, a distance between the super lens array and a screen, a focal length period duty cycle of the super lens array, a size of a screen pixel and the number of single super lens modulation pixels.
7. The binocular near-eye integrated imaging 3D display system of claim 6, wherein the generated 2D image as the image source light satisfies the following formula:
wherein pa is parallax of central areas of two 2D images displayed by two micro-screens, corresponds to difference value of visual field ranges of left and right eyes, L is binocular pupil distance of a viewer, depth is distance of an imaging surface from a super lens array, gap is distance of a screen from the super lens array, pp is pixel size of the micro-display screen, after light rays scattered by image source light enter a right eye (1) or a left eye (2), virtual 3D objects are reconstructed at the same depth and position at a distance, 3D images under different visual angles are obtained by independent observation of two eyes, and a complete 3D object is obtained by reconstruction at the distance after the two eyes observe together.
8. A head-mounted display device, comprising a bracket (10) and a connecting piece (11), wherein the bracket (10) is arranged on glasses through the connecting piece (11), and the bracket (10) is provided with the binocular near-to-eye integrated imaging 3D display system based on the superlens array as claimed in any one of claims 1-7.
9. The head-mounted display device according to claim 8, wherein a first micro display screen (5) and a second micro display screen (6) which are parallel to the direction of the line of sight of a viewer are respectively arranged on the support (10), a first superlens array (3) is arranged at a preset distance from the bottom end of the first micro display screen (5), a second superlens array (4) is arranged at a preset distance from the bottom end of the second micro display screen (6), and a first light splitting element (8) and a second light splitting element (9) are respectively arranged at the ends, far away from the micro display screens, of the first superlens array (3) and the second superlens array (4).
10. The head-mounted display device according to claim 9, wherein an included angle formed by the first light splitting element (8) and the second light splitting element (9) and the superlens array is 45 degrees, image source light emitted by the first micro display screen (5) is modulated by the first superlens array (3), and then transmitted to the right eye (1) through the first light splitting element (8), image source light Jing Dier emitted by the second micro display screen (6) is modulated by the superlens array (4), and then transmitted to the left eye (2) through the second light splitting element (9), and light rays on two sides are fused through the visual center of human eyes to construct a complete 3D object at a far place.
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