CN217467363U - Near-to-eye display optical system and head-mounted display equipment - Google Patents

Abstract

The utility model provides a nearly eye shows optical system and head-mounted display device, wherein, this nearly eye shows optical system and includes: the three-dimensional display device comprises a three-dimensional display device, a projection lens and a beam splitter array; the projection optics include a plurality of projection lens units, and the beam splitter array includes a plurality of super-surface beam splitters; the super-surface beam splitter is positioned on the light emergent side of the three-dimensional display device and is positioned between the three-dimensional display device and the projection lens; the super-surface beam splitter is configured to split the incident imaging light rays to each projection lens unit; different projection lens units are configured to converge the incident imaging light rays to different positions. Through the retina 3D type near-to-eye display optical system and the head-mounted display equipment provided by the embodiment of the utility model, the imaging light can be split, imaging is carried out at a plurality of different positions, pupil replication is realized, and thus the eye movement range can be enlarged; the mode can be realized by utilizing the superlens without a holographic optical element, and the structure is simple and easy to realize.

Description

Near-to-eye display optical system and head-mounted display equipment

Technical Field

The utility model relates to a near-to-eye display technology field particularly, relates to a near-to-eye display optical system and head mounted display device.

Background

Virtual Reality (VR) and Augmented Reality (AR) technologies have a wide application value in many fields such as military, medical, entertainment, education by creating a three-dimensional simulation environment with experience or superimposing Virtual information on a real environment.

In the existing near-eye display technology, the retina 3D technology focuses a narrow collimated light beam into the pupil and projects the collimated light beam onto the retina. By forming a focal point at the pupil into the eye of the observer, it can produce a wide and uniform illumination at the retina. The image on the display screen can be scanned to the retina of a subject pixel by pixel, the single pixel in the image is allowed to be influenced by dynamic optics when being scanned to the retina of a user, and an observer can really perceive a three-dimensional stereoscopic image by reconstructing the depth information of the single pixel or adopting a holographic technology as a display source, so that the three-dimensional stereoscopic image is a true three-dimensional display.

For AR/VR systems, eye box (eyebox) is a crucial parameter, which refers specifically to the field of view without vignetting and aberrations. The eye movement range is related to the interpupillary distance of human eyes, and the larger the eye movement range is, the larger the interpupillary distance inclusion degree of different human eyes is. One limitation of conventional near-eye display optical systems is the small eye movement range. In order to increase the eye movement range, a pupil replication (pupil replication) method may be adopted, and a multi-focus array is generated by replication to increase the eye movement range. At present, a method for enlarging the eye movement range based on pupil replication mainly adopts holographic optical elements for replication to generate a multi-focus array, which needs multilayer holographic optical elements and increases the thickness of a system; moreover, the holographic optical element has the disadvantages of large production investment and difficult mass production, and most of the holographic optical elements stay in the laboratory stage at present.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, an object of the embodiments of the present invention is to provide a near-eye display optical system and a head-mounted display device.

In a first aspect, an embodiment of the present invention provides a near-to-eye display optical system, including: a three-dimensional display device, a projection lens, and a beam splitter array; the projection optics comprise a plurality of projection lens units, and the beam splitter array comprises a plurality of super-surface beam splitters;

the three-dimensional display device is configured to emit imaging light for realizing three-dimensional display;

the super-surface beam splitter is positioned on the light emergent side of the three-dimensional display device and is positioned between the three-dimensional display device and the projection lens; the super-surface beam splitter is configured to split the incident imaging light rays to each of the projection lens units;

different ones of the projection lens units are configured to converge the incident imaging light rays to different positions.

In one possible implementation, the number of the super-surface beam splitters is the same as the number of the projection lens units, and the positions correspond to one another.

In one possible implementation, the near-eye display optical system further includes a light deflecting element;

the light ray deflection element is positioned between the beam splitter array and the projection lens and is configured to reflect the imaging light rays emitted by the beam splitter array to the projection lens;

the projection lens is configured to converge the imaging light reflected by the light deflecting element.

In one possible implementation, the light deflecting element is a transflective element; the light ray deflection element is configured to reflect at least part of the imaging light rays and transmit at least part of light rays in a visible light wave band;

or,

the light deflection element is a reflector or a prism.

In one possible implementation, the projection optics are refractive lenses or superlenses.

In one possible implementation, the three-dimensional display device includes: an image source;

the image source is configured to emit imaging light.

In one possible implementation, the image source includes: a light source and a spatial light modulator; the three-dimensional display device further comprises a collimating lens;

the light source is configured to emit light;

the collimating lens is positioned on the light-emitting side of the light source and is configured to collimate the light emitted by the light source;

the spatial light modulator is located on the light-emitting side of the collimating lens, is configured to load a hologram, and emits imaging light.

In one possible implementation, the light source includes a fiber coupled laser; or

The light source comprises a light emitting diode and a narrow-band filter, and the narrow-band filter is located on the light emitting side of the light emitting diode.

In one possible implementation, the image source includes: a laser and a mechanical scanning element;

the laser is configured to emit a laser line;

the mechanical scanning piece is located on the light emitting side of the laser and is configured to emit laser lines emitted by the laser in a scanning mode to form imaging light.

In one possible implementation, the three-dimensional display device further includes a collimating lens;

the collimating lens is located on the light-emitting side of the mechanical scanning piece and is configured to collimate imaging light emitted by the mechanical scanning piece.

In one possible implementation, the mechanical scanning element comprises a MEMS galvanometer.

In one possible implementation, the three-dimensional display device further includes a first lens, a second lens, and an aperture stop;

in the main optical axis direction of the image source, the first lens, the aperture diaphragm and the second lens are sequentially arranged and coaxial;

the first lens and the second lens have a common focal plane, and the aperture stop is located at the common focal plane.

In one possible implementation, the first lens and the second lens are both superlenses.

In a second aspect, the embodiments of the present invention further provide a head-mounted display device, including: the near-eye display optical system and the support housing as described above;

the near-eye display optical system is located inside the support housing; the support housing is configured to secure the near-eye display optical system.

In one possible implementation, the head-mounted display device further includes: a securing strap configured to be coupled with the support housing and form a loop structure that enables a user to wear on the head.

In the embodiment of the present invention, in the solution provided by the first aspect, the plurality of super-surface beam splitters and the plurality of projection lens units are used to split the imaging light beam and image at a plurality of different positions, so as to realize pupil replication, thereby increasing the eye movement range; the mode can be realized by utilizing the superlens without a holographic optical element, and has simple structure and easy realization.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating a first structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a second structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating a third structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a first structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a second structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a third structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a fourth structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating a fifth structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating a sixth structure of a three-dimensional display device according to an embodiment of the present invention;

fig. 10 is a schematic diagram illustrating an overall structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating another overall structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 12 is a schematic diagram illustrating another overall structure of a near-eye display optical system according to an embodiment of the present invention;

fig. 13 shows a schematic structural diagram of a head-mounted display device according to an embodiment of the present invention.

An icon:

10-three-dimensional display device, 20-projection lens, 30-beam splitter array, 40-ray deflection element, 11-image source, 12-collimating lens, 13-aperture diaphragm, 111-light source, 112 spatial light modulator, 113-laser, 114-mechanical scanning piece, 121-first lens, 122-second lens, 21-projection lens unit, 31-super surface beam splitter, 1-near-to-eye display optical system, 2-support shell and 3-fixing band.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

An embodiment of the utility model provides a near-to-eye display optical system utilizes the beam splitter array to realize the pupil duplication to increase eye movement scope. Referring to fig. 1, the near-eye display optical system includes: a three-dimensional display device 10, aprojection optic 20, and abeam splitter array 30; theprojection optics 20 comprises a plurality ofprojection lens cells 21 and the beam splitter array comprises a plurality of supersurface beam splitters 31. In FIG. 1,beam splitter array 30 includes 3super-surface beam splitters 31; theprojection optics 20 includes 3projection lens units 21. Alternatively, the number of the supersurface beam splitters 31 is the same as that of theprojection lens units 21, and the positions correspond one to one, so as to conveniently implement the beam splitting function.

Among them, the three-dimensional display device 10 is configured to emit imaging light for realizing three-dimensional display. As shown in fig. 1, thesuper-surface beam splitter 31 is located on the light outgoing side of the three-dimensional display device 10 and between the three-dimensional display device 10 and theprojection lens 20; the supersurface beam splitter 31 is configured to split the incident imaging light rays to eachprojection lens unit 21; the differentprojection lens units 21 are configured to converge the incident imaging light rays to different positions.

In the embodiment of the present invention, the three-dimensional display device 10 is used to emit the imaging light capable of realizing three-dimensional display. For example, the three-dimensional display device 10 may emit collimated imaging light rays to facilitate the convergence of the collimated imaging light rays by theprojection lens 20 located on the light exit side of the three-dimensional display device 10. Theprojection lens 20 is used for converging imaging light rays to a position where a pupil of a human eye can reach, so that the light rays focused on the pupil can be projected onto a retina, and wide and uniform illumination is generated on the retina, thereby realizing three-dimensional imaging.

In particular, to achieve a good three-dimensional imaging effect, the three-dimensional display device 10 is configured to emit a narrow light beam, i.e. a light beam having a divergence angle smaller than a predetermined threshold, for example smaller than 8 °. Under the action of theprojection lens 20, the near-eye display optical system can generate a narrow beam of light entering the pupil of the observer, the incident beam of light "draws" an image on the retina, and then displays a virtual image to the observer, thereby realizing three-dimensional imaging.

In the embodiment of the present invention, after the imaging light beam is injected into the supersurface beam splitter 31, the supersurface beam splitter 31 diffracts the incident imaging light beam, thereby splitting the imaging light beam to eachprojection lens unit 21. For example, thesuper-surface beam splitter 31 may include a plurality of beam splitting units arranged in an array (e.g., m × n arrangement), each beam splitting unit being similar to a two-dimensional grating, and the incident light may be diffracted to have different diffraction orders corresponding to different diffraction angles, so as to split the imaging light to differentprojection lens units 21. Differentprojection lens units 21 are located at different positions so that the imaging light can be converged to a plurality of different positions, pupil replication is achieved, and the eye movement range is increased.

The embodiment of the utility model provides a near-to-eye display optical system utilizes a plurality of supersurface beam splitters 31 and a plurality ofprojection lens unit 21, can carry out the beam splitting to the formation of image light to form images in a plurality of different positions, realize the pupil duplication, thereby can increase eye movement scope; the mode can be realized by utilizing the superlens without a holographic optical element, and the structure is simple and easy to realize.

Alternatively, theprojection optics 20 may be a conventional refractive lens or a superlens. Specifically, as shown in fig. 1, theprojection lens 20 is a microlens array, and eachprojection lens unit 21 is a microlens; alternatively, as shown in fig. 2, theprojection lens 20 is a super lens array, in which each super lens corresponds to oneprojection lens unit 21, so that the volume and mass of the near-eye display optical system can be reduced, and the miniaturization and the lightness can be conveniently realized.

Optionally, referring to fig. 3, the near-eye display optical system further includes alight deflecting element 40; thelight deflecting element 40 is located between thebeam splitter array 30 and theprojection lens 20, and configured to reflect the imaging light emitted from thebeam splitter array 30 to theprojection lens 20; theprojection lens 20 is configured to converge the image light reflected by thelight deflecting element 40. For example, thelight deflecting element 40 may be a mirror, a prism, or the like.

The embodiment of the utility model provides an in, utilizelight deflection component 40 can change the light path of formation of image light to can adjust the position of different parts, increase this nearly eye display optical system's design degree of freedom. For example, when the near-eye display optical system is applied to eyeglasses, the three-dimensional display device 10, thebeam splitter array 30, and the like may be disposed at temple positions, and theprojection lens 20 may be disposed directly in front of the human eye. Optionally, when the near-eye display optical system is applied to AR glasses, in order to avoid thelight deflecting element 40 from blocking external ambient light from entering into human eyes, thelight deflecting element 40 is a transflective element, which can reflect at least part of imaging light and transmit at least part of light in a visible light band, that is, can transmit at least part of ambient light, so that human eyes can normally view an external environment while viewing an image formed by the near-eye display optical system.

On the basis of any of the above embodiments, the three-dimensional display device 10 includes: animage source 11; theimage source 11 is configured to emit imaging light, and the imaging light is enabled to realize three-dimensional display by cooperation of other optical elements.

For example, referring to fig. 4, theimage source 11 includes: alight source 111 and a spatiallight modulator 112, and the three-dimensional display device 10 further comprises acollimator lens 12. Thelight source 111 is configured to emit light; thecollimating lens 12 is located at the light emitting side of thelight source 111 and configured to collimate the light emitted by thelight source 111; the spatiallight modulator 112 is located on the light exit side of thecollimator lens 12, configured to load a hologram, and to emit imaging light rays.

The embodiment of the utility model provides an in,light source 111 sends behind the light by collimatinglens 12 collimation to light directive spatiallight modulator 112 after the collimation, spatiallight modulator 112 loading is by computer calculation's hologram, carries out wavefront modulation to the light of collimation on it and makes it have depth information, later utilizesbeam splitter array 30 andprojection lens 20 to project the image projection that spatiallight modulator 112 reappeared to a plurality of positions, for example the position that the people's eye pupil can reach. The spatial light modulator may be a liquid crystal spatial light modulator, or may be a spatial light modulator based on a super surface.

Alternatively, to be able to form a narrow beam, thelight source 111 may include a fiber coupled laser, the output of which outputs laser light; alternatively, thelight source 111 includes a light emitting diode and a narrow-band filter, and the narrow-band filter is located at the light emitting side of the light emitting diode to restrict the light emitted from the light emitting diode within a small angle, thereby generating a narrow light beam. The narrow-band filter refers to a filter with a passband smaller than a preset threshold.

Further alternatively, as shown in fig. 4, the collimatinglens 12 may be a conventional refractive lens, such as a convex lens; alternatively, as shown in fig. 5, the collimatinglens 12 may be a super lens, and the size and mass of the near-to-eye display optical system can be further reduced by using thecollimating lens 12 in the form of a super lens, so as to facilitate miniaturization and lightness.

The embodiment of the utility model provides a near-to-eye display optical system, three-dimensional display device 10 utilize collimatinglens 12 to realize the light collimation, and it has simple structure, frivolous, low-priced and the high advantage of productivity for this near-to-eye display optical system is whole more frivolous, is applicable to wearable display device more.

Optionally, referring to fig. 6, theimage source 11 may also include: alaser 113 and amechanical scanning element 114. Thelaser 113 is configured to emit a laser line; themechanical scanning element 114 is located on the light-emitting side of thelaser 113 and is configured to emit the laser line emitted by thelaser 113 in a scanning manner to form an image light. Optionally, the three-dimensional display device 10 may also include acollimating lens 12, where the collimatinglens 12 is located on the light-emitting side of themechanical scanning component 114 and configured to collimate the imaging light emitted from themechanical scanning component 114.

In the embodiment of the present invention, the light source of theimage source 11 adopts thelaser 113, and utilizes themechanical scanning element 114 to form the scanning image in the scanning manner, and emit the imaging light corresponding to the scanning image. For example, theMechanical scanner 114 includes a MEMS (Micro-Electro-Mechanical System) galvanometer. Themechanical scanning element 114 may directly emit imaging light, or the light emitted from themechanical scanning element 114 is collimated by the collimatinglens 12 and then emitted to theprojection lens 20 to realize imaging. Optionally, referring to fig. 7, the collimatinglens 12 may also be a superlens, and the volume and mass of the near-to-eye display optical system can be further reduced by using thecollimating lens 12 in the form of a superlens, so as to facilitate miniaturization and lightness.

In the embodiment of the present invention, a collimatinglens 12 is disposed in the three-dimensional display device 10, and thecollimating lens 12 is a super lens capable of achieving collimating function; compared with the conventional collimating lens, the collimating lens has the characteristic of being light and thin, and the thickness of the three-dimensional display device 10 can be reduced. The image light emitted from theimage source 11 can be collimated by the collimatinglens 12. As shown in fig. 6, the collimatinglens 12 may be located on the light exit side of theimage source 11, that is, the collimatinglens 12 collimates the imaging light emitted from theimage source 11; alternatively, as shown in fig. 4, the collimatinglens 12 may be embedded in theimage source 11, so that the imaging light rays emitted from theimage source 11 are collimated. The embodiment of the utility model provides a do not restrict thiscollimating lens 12's position, only need guarantee that imaging light is by collimatinglens 12 collimation before spouting out from three-dimensional display device 10 can.

Alternatively, referring to fig. 8, the three-dimensional display device 10 may alternatively include thefirst lens 121, and theaperture stop 13. In the main optical axis direction of theimage source 11, thefirst lens 121, theaperture stop 13, and thesecond lens 122 are sequentially disposed and coaxial; thefirst lens 121 and thesecond lens 122 have a common focal plane, and theaperture stop 13 is located at the common focal plane.

In the embodiment of the present invention, thefirst lens 121 and thesecond lens 122 of the confocal plane form a relay lens group (4f system), so as to collimate the imaging light emitted from theimage source 11. In addition, acoaxial aperture stop 13 is disposed on a common focal plane of thefirst lens 121 and thesecond lens 122, and a narrow light beam can be emitted from a light emitting side (image space) of thesecond lens 122 by using a limiting effect of theaperture stop 13, so as to conveniently realize three-dimensional imaging. Theimage source 11 may be a Light Emitting Diode (LED) display, an Organic Light Emitting Diode (OLED) display, a liquid crystal on silicon (LCoS) display, or the like.

Optionally, referring to fig. 9, thefirst lens 121 and thesecond lens 122 are both super lenses, so that the size and the mass of the near-eye display optical system can be further reduced, miniaturization and lightness and thinness can be conveniently realized, and wafer-level packaging can be conveniently realized for thefirst lens 121 and thesecond lens 122, so as to generate a wafer-level packaged 4f system, where the 4f system is an integrated structure. Further optionally, the focal length of thefirst lens 121 is greater than or equal to the focal length of thesecond lens 122, so that the 4f system can function as an image magnification.

In the embodiment of the present invention, if theimage source 11 is based on holographic display, theimage source 11 shown in fig. 4 or 5 may be adopted, and the overall structure of the near-to-eye display optical system can be seen in fig. 10. If theimage source 11 is based on mechanical scanning (e.g., MEMS-LBS) for imaging, it may employ theimage source 11 as shown in fig. 6 or 7, and the overall configuration of the near-eye display optical system may be as shown in fig. 11. If theimage source 11 is based on a relay lens group for imaging, it may adopt theimage source 11 shown in fig. 8 or 9, and the overall structure of the near-eye display optical system can be seen in fig. 12.

The embodiment of the utility model provides a near-to-eye display optical system, three-dimensional display device 10 can jet out the image light who realizes three-dimensional formation of image to converge image light to people's eye pupil department underprojection lens 20's effect, make the light of focus on the pupil can project the retina, produce extensive and even illumination at the retina, realize three-dimensional formation of image. The three-dimensional display device 10 can utilize thecollimating lens 10, the super-lenstype projection lens 20 and the like to realize light control, and has the advantages of simple structure, lightness and thinness, low price and high productivity, so that the whole near-to-eye display optical system is lighter and thinner, and is more suitable for wearable display equipment. By using the plurality ofsuper-surface beam splitters 31 and the plurality ofprojection lens units 21, the imaging light can be split and imaged at a plurality of different positions, so that pupil replication is realized, and the eye movement range can be enlarged; the mode can be realized by utilizing the superlens without a holographic optical element, and has simple structure and easy realization.

The embodiment of the utility model provides a still provide a head-mounted display device, see fig. 13 and show, include: the near-eye displayoptical system 1 and thesupport housing 2 provided in any of the above embodiments; the near-eye displayoptical system 1 is located inside thesupport case 2; thesupport case 2 is configured to fix the near-eye displayoptical system 1.

The embodiment of the utility model provides an among the head mounted display device,support casing 2 is used for showingoptical system 1 encapsulation near the eye inside it, can fix and protect this near the eye and showoptical system 1. The near-eye displayoptical system 1 can be centrally arranged inside thesupport housing 2, so that when a user wears the head-mounted display device on the head, two eyes of the user can adaptively correspond to the near-eye displayoptical system 1, and a function of displaying a three-dimensional stereoscopic image to pupils of human eyes is realized. The embodiment of the utility model provides a wear-type display device adopts more slender near-to-eye displayoptical system 1, can make whole wear-type display device's structure more frivolous compact, and it is higher to wear the comfort level.

Optionally, referring to fig. 13, the head-mounted display device further includes: and the fixingbelt 3 is used for being connected with the supportingshell 2 and forming a ring-shaped structure which can be worn on the head of a user. Wherein, fixedband 3 forms loop configuration after linking to each other withsupport housing 2, makes the user when wearing this head mounted display device, can laminate the head profile more, promotes the comfort level of wearing.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the technical solutions of the changes or replacements within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (15)

1. A near-eye display optical system, comprising: a three-dimensional display device (10), a projection optic (20), and a beam splitter array (30); the projection optics (20) comprising a plurality of projection lens units (21), the beam splitter array (30) comprising a plurality of super-surface beam splitters (31);

the three-dimensional display device (10) is configured to emit imaging light for realizing three-dimensional display;

the super-surface beam splitter (31) is positioned on the light-emitting side of the three-dimensional display device (10) and between the three-dimensional display device (10) and the projection lens (20); the super-surface beam splitter (31) is configured to split the incident imaging light rays to each of the projection lens units (21);

different ones of the projection lens units (21) are configured to converge the incident imaging light rays to different positions.

2. The near-eye display optical system according to claim 1, wherein the number of the super surface beam splitters (31) is the same as the number of the projection lens units (21), and the positions thereof correspond to one another.

3. The near-eye display optical system according to claim 1, further comprising a light deflecting element (40);

the light ray deflection element (40) is positioned between the beam splitter array (30) and the projection lens (20) and is configured to reflect the imaging light rays emitted by the beam splitter array (30) to the projection lens (20);

the projection optics (20) are configured to converge the imaging light rays reflected by the light ray deflecting element (40).

4. The near-eye display optical system according to claim 3, wherein the light ray deflecting element (40) is a transflective element; the light deflecting element (40) is configured to reflect at least part of the imaging light and transmit at least part of light in the visible wavelength band;

or,

the light beam deflection element (40) is a reflector or a prism.

5. The near-to-eye display optical system of claim 1, wherein the projection optics (20) is a refractive lens or a superlens.

6. A near-eye display optical system according to any one of claims 1-5, characterized in that the three-dimensional display device (10) comprises: an image source (11);

the image source (11) is configured to emit imaging light.

7. The near-eye display optical system according to claim 6, wherein the image source (11) comprises: a light source (111) and a spatial light modulator (112); the three-dimensional display device (10) further comprises a collimating lens (12);

the light source (111) is configured to emit light;

the collimating lens (12) is positioned on the light-emitting side of the light source (111) and is configured to collimate the light emitted by the light source (111);

the spatial light modulator (112) is located on the light exit side of the collimating lens (12), configured to load a hologram, and to emit imaging light rays.

8. The near-eye display optical system according to claim 7,

the light source (111) comprises a fiber coupled laser; or

The light source (111) comprises a light emitting diode and a narrow-band filter, and the narrow-band filter is located on the light emitting side of the light emitting diode.

9. The near-eye display optical system according to claim 6, wherein the image source (11) comprises: a laser (113) and a mechanical scanning element (114);

the laser (113) is configured to emit a laser line;

the mechanical scanning piece (114) is positioned on the light-emitting side of the laser (113) and is configured to emit laser lines emitted by the laser (113) in a scanning mode to form imaging light lines.

10. The near-eye display optical system according to claim 9, wherein the three-dimensional display device (10) further comprises a collimating lens (12);

the collimating lens (12) is located on the light-emitting side of the mechanical scanning piece (114) and is configured to collimate imaging light rays emitted by the mechanical scanning piece (114).

11. The near-to-eye display optical system of claim 9, wherein the mechanical scanning element (114) comprises a MEMS galvanometer.

12. The near-eye display optical system according to claim 6, characterized in that the three-dimensional display device (10) further comprises a first lens (121), a second lens (122), and an aperture stop (13);

in the main optical axis direction of the image source (11), the first lens (121), the aperture diaphragm (13) and the second lens (122) are arranged in sequence and are coaxial;

the first lens (121) and the second lens (122) have a common focal plane, the aperture stop (13) being located at the common focal plane.

13. The near-eye display optical system according to claim 12, wherein the first lens (121) and the second lens (122) are both superlenses.

14. A head-mounted display device, comprising: the near-to-eye display optical system (1) and the support housing (2) of any one of claims 1-13;

the near-eye display optical system (1) is located inside the support housing (2); the support housing (2) is configured to fix the near-eye display optical system (1).

15. The head-mounted display device of claim 14, further comprising: a securing strap (3), the securing strap (3) being configured to be connected with the support housing (2) and forming a loop-like structure enabling a user to wear on the head.

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