CN216870950U - Optical waveguide element and near-to-eye display device - Google Patents

Abstract

The embodiment of the utility model relates to the technical field of near-eye display, and discloses an optical waveguide element which is provided with a longitudinal pupil expanding splitting surface array and a transverse pupil expanding splitting surface array and is used for realizing two-dimensional pupil expanding, the longitudinal eye movement range is further increased in the longitudinal direction by arranging coupling splitting surfaces on the light incidence sides of the longitudinal pupil expanding splitting surface array and the transverse pupil expanding splitting surface array, or by arranging symmetrically arranged coupling splitting surfaces, the symmetrically arranged longitudinal pupil expanding splitting surface array and the transverse pupil expanding splitting surface array, and the center of the eye movement range of light rays emitted from a pupil can be basically kept consistent with the height of the center of a waveguide sheet when the optical waveguide element is applied to near-eye display equipment.

Description

Optical waveguide element and near-to-eye display device

Technical Field

The embodiment of the utility model relates to the technical field of near-eye display, in particular to an optical waveguide element and near-eye display equipment.

Background

Augmented Reality (AR) technology is a technology that fuses virtual information and a real world, and a near-eye display device is a device that realizes optical imaging using the AR technology. The near-eye display device enables a user to see a real world and a virtual image constructed by a computer, a conical range formed by human eyes and the virtual image is called a field angle, the distance between the human eyes and the display device when the human eyes can see a full virtual image is called an exit pupil distance, and the range in which the human eyes can shake when the human eyes can see the full virtual image at a certain exit pupil distance is called an eye movement range.

In implementing the embodiments of the present invention, the inventors found that at least the following problems exist in the above related art: at present, near-eye display devices on the market are usually in the form of glasses, helmets and the like, the size of an optical machine needs to be reduced in order to reduce the burden on the head of a user, the size of the optical machine is usually reduced in a two-dimensional pupil expansion mode under the condition that the original eye movement range is ensured, however, when the two-dimensional pupil expansion near-eye display device needs a larger eye movement range, the size of a light emitting surface of the optical machine still needs to be increased, so that the size of the optical machine is increased, and the problem that the eye movement range is not located at the center of a waveguide sheet exists.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical waveguide element with a large eye movement range and a near-eye display device.

The purpose of the embodiment of the utility model is realized by the following technical scheme:

in order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides an optical waveguide element, including:

the light-splitting surface is used for receiving incident light and partially transmitting and emitting, partially reflecting and emitting or totally reflecting the incident light;

the longitudinal pupil expanding and light splitting surface array is arranged on the reflected light emitting side of the coupling-in and light splitting surface and is used for longitudinally expanding the partially reflected and emitted light rays and then emitting the light rays;

the transverse pupil expanding splitting surface array is arranged on the transmission light outlet side of the coupling splitting surface and on the reflection light outlet side of the longitudinal pupil expanding splitting surface array, and is used for emitting the light rays which are emitted by partial transmission and the light rays which are emitted after the longitudinal pupil expanding.

In some embodiments, the reflectance of the incoupling splitting plane is: r1 is more than or equal to 90% and less than or equal to 100%, wherein,

when the reflectivity R1 of the coupling-in light-splitting surface is less than 100%, the coupling-in light-splitting surface is used for partially transmitting and partially reflecting the incident light to exit.

When the reflectance R1 of the light-splitting surface is 100%, the light-splitting surface is used to totally reflect the incident light.

In some embodiments, further comprising:

a coupling-in structure, which is arranged on the light-in side of the light-coupling-in splitting surface and is used for coupling the incident light into the optical waveguide element;

in some embodiments, the coupling-in structure is a triangular prism with a specific inclination angle, which is disposed on the surface of the optical waveguide element and disposed on the light-incident side of the light-splitting surface.

In some embodiments, the array of longitudinal pupil expanding facets comprises at least two longitudinal pupil expanding facets, each of which has a reflectivity that increases with increasing distance from the coupling-in structure,

the reflectivity of the longitudinal pupil expanding splitting surface is as follows: r2 is more than or equal to 5% and less than or equal to 100%.

In some embodiments, the array of transverse pupil splitting planes comprises at least two transverse pupil splitting planes, each of which has a reflectivity that increases with increasing distance from the incoupling structure,

the reflectivity of the transverse pupil expanding splitting surface is as follows: r3 is more than or equal to 5% and less than or equal to 50%.

In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides an optical waveguide element, including:

the symmetrically arranged coupling-in light splitting surfaces are used for receiving incident light, partially transmitting and emitting the incident light and partially reflecting and emitting the incident light;

the symmetrically arranged longitudinal pupil expanding splitting surface arrays are respectively and correspondingly arranged on the reflected light emitting sides of the symmetrically arranged coupling-in splitting surfaces and are used for longitudinally expanding the reflected emergent light rays and then emitting the expanded light rays;

the light source comprises a transverse pupil expanding splitting surface array, a light source and a light source, wherein the transverse pupil expanding splitting surface array is arranged on a transmission light outlet side of a coupling-in splitting surface which is symmetrically arranged, and the reflection light outlet side of a longitudinal pupil expanding splitting surface array which is symmetrically arranged is used for emitting light rays which are emitted after a longitudinal pupil expanding.

In some embodiments, further comprising:

the reflectivity of the symmetrically arranged coupling-in light splitting surfaces is as follows: r1 is more than or equal to 90% and less than 100%.

In some embodiments, further comprising:

the coupling-in structure is arranged on the light inlet side of the symmetrically arranged coupling-in light splitting surface and is used for coupling the incident light into the optical waveguide element;

in some embodiments, the coupling-in structure is a triangular prism with a specific tilt angle, which is disposed on the surface of the optical waveguide element and disposed on the light incident side of the symmetrically disposed coupling-in splitting plane.

In some embodiments, the array of symmetrically arranged longitudinal pupil splitting planes comprises at least two symmetrically arranged longitudinal pupil splitting planes, each of the symmetrically arranged longitudinal pupil splitting planes having a reflectivity that increases with increasing distance from the incoupling structure,

the reflectivity of the longitudinal pupil expanding splitting surface which is symmetrically arranged is as follows: r2 is more than or equal to 5% and less than or equal to 100%.

In some embodiments, the array of transverse pupil splitting planes comprises at least two transverse pupil splitting planes, each of which has a reflectivity that increases with increasing distance from the incoupling structure,

the reflectivity of the transverse pupil expanding splitting surface is as follows: r3 is more than or equal to 5% and less than or equal to 50%.

To solve the above technical problem, in a third aspect, an embodiment of the present invention provides a near-eye display device, including:

an optical engine, and the optical waveguide device according to the first or second aspect, wherein the light incident side of the optical waveguide device is disposed on the light emergent side of the optical engine,

the center of the eye movement range of the light emitted after passing through the two-dimensional pupil expansion of the optical waveguide element is consistent with the center of the waveguide piece.

In some embodiments, the optical engine includes, sequentially arranged according to the light-emitting direction: a light source, a collimating lens group, a light splitting structure, an MEMS galvanometer and a relay lens,

the light incident side of the optical waveguide element is arranged on the light emergent side of the relay lens.

Compared with the prior art, the utility model has the beneficial effects that: in contrast to the prior art, an embodiment of the present invention provides an optical waveguide element, where the optical waveguide element is provided with a longitudinal pupil expanding splitting surface array and a transverse pupil expanding splitting surface array, and is configured to implement a two-dimensional pupil expanding, and transmit a light portion entering the optical waveguide element onto the transverse pupil expanding splitting surface array by setting a coupling-in splitting surface on light incident sides of the longitudinal pupil expanding splitting surface array and the transverse pupil expanding splitting surface array, or further increase an eye movement range in a longitudinal direction by setting a symmetrically-arranged coupling-in splitting surface and a symmetrically-arranged longitudinal pupil expanding splitting surface array, and when the optical waveguide element is applied to a near-eye display device, a center of an eye movement range of light exiting from a pupil can be substantially consistent with a height of a center of a waveguide sheet.

Drawings

The embodiments are illustrated by the figures of the accompanying drawings which correspond and are not meant to limit the embodiments, in which elements/blocks having the same reference number designation may be represented by like elements/blocks, and in which the drawings are not to scale unless otherwise specified.

Fig. 1 is a schematic structural diagram and an optical path diagram of an optical waveguide device according to an embodiment of the present invention;

FIG. 2 is a three-dimensional view of the optical waveguide component of FIG. 1;

fig. 3 is a schematic structural diagram and an optical path diagram of an optical waveguide device according to a second embodiment of the present invention;

FIG. 4 is a front view and optical path schematic of the optical waveguide component of FIG. 3;

fig. 5 is a schematic structural diagram of a near-eye display device according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of an optical machine in the near-eye display device shown in fig. 5.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the utility model. All falling within the scope of the present invention.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that, if not conflicted, the various features of the embodiments of the utility model may be combined with each other within the scope of protection of the present application. In addition, although the functional blocks are divided in the device diagram, in some cases, the blocks may be divided differently from those in the device. It should be noted that the terms "longitudinal", "transverse", "front", "back" and the like are used herein for illustrative purposes only, and for the purpose of facilitating the definition of the connection structure, the present invention is defined with reference to the propagation direction of light rays in the optical waveguide element and the near-eye display device as a reference for the position of the components.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.

Example one

An optical waveguide component according to an embodiment of the present invention is provided, and fig. 1 and fig. 2 are provided, where fig. 1 shows a structure and an optical path of an optical waveguide component according to an embodiment of the present invention, and fig. 2 is a front view of the optical waveguide component shown in fig. 1, where the optical waveguide component 10 includes: a coupling-in spectroscopic surface 11, a longitudinal pupil-expanding spectroscopic surface array 12 and a transverse pupil-expanding spectroscopic surface array 13. Further, the optical waveguide element 10 may further include: coupling-in structure 14.

The incoupling light splitting surface 11 is used for receiving incident light and partially transmitting, partially reflecting or totally reflecting the incident light. Preferably, the reflectance of the coupling-in spectroscopic surface 11: 90% ≦ R1 ≦ 100%, wherein the incoupling splitting face 11 is configured to partially transmit and partially reflect the incident light to exit when the reflectance R1 of the incoupling splitting face 11 is less than 100%. In some other embodiments, the light-coupling-in splitting surface 11 may be a structure with a reflectivity of 100%, and when the reflectivity R1 of the light-coupling-in splitting surface 11 is 100%, the light-coupling-in splitting surface 11 is used to totally reflect the incident light.

In the embodiment of the present invention, since the longitudinal pupil expanding splitting surface array 12 is generally provided with a plurality of splitting surfaces as shown in fig. 1, each splitting surface needs to reflect and emit a part of light, and the intensity of the light transmitted and emitted by the coupling-in splitting surface 11 should be close to the intensity of the light emitted by each splitting surface of the longitudinal pupil expanding splitting surface array 12, so that the emitted image light can be uniformly output in the longitudinal direction, and the finally emitted image light can present uniform brightness. Specifically, the arrangement of the reflection capability and the transmission capability of the light-splitting surface 11 can be designed according to actual needs, and need not be limited by the embodiment of the present invention.

In the embodiment of the present invention, the coupling-in spectroscopic surface 11 is configured to have a structure with a certain transmission capability, so that after entering the optical waveguide element 10, light emitted from the optical engine 20 can transmit a part of the light to directly emit onto the transverse pupil expanding spectroscopic surface array 13, so as to directly increase a range capable of emitting light in a longitudinal direction, that is, as shown in fig. 1, the area a is the maximum eye movement range that the optical waveguide element 10 provided in the embodiment of the present invention can most exhibit, and the optical waveguide element 11 provided in the embodiment of the present invention can "pull up" the upper edge of the trapezoid a, so as to "pull up" the eye movement range a, so that the coupled-out light can be in the middle area of the near-eye display device as much as possible, and has a larger eye movement range.

The longitudinal pupil expanding and light splitting surface array 12 is arranged on the reflected light emitting side of the coupling-in and light splitting surface 11 and is used for longitudinally expanding the partially reflected and emitted light and then emitting the light; preferably, the longitudinal pupil expanding facet array 12 comprises at least two longitudinal pupil expanding facets, the reflectivity of each of which increases with increasing distance from the coupling structure 14, the reflectivity of which: r2 is more than or equal to 5% and less than or equal to 100%, specifically, the reflectivity of each light splitting surface can be arranged in a step shape. Further, the splitting planes of each of the longitudinal pupil-expanding splitting plane arrays 12 are parallel to each other and to the coupling-in splitting plane 11, and are perpendicular to the front and rear surfaces of the optical waveguide element 10.

The transverse pupil expanding and light splitting surface array 13 is arranged on the transmission light-emitting side of the coupling light splitting surface 11 and on the reflection light-emitting side of the longitudinal pupil expanding and light splitting surface array 12, and is used for emitting the part of light which is emitted in a transmission way and the light which is emitted after the longitudinal pupil expanding and light splitting surface array is transversely emitted after the pupil expanding. Preferably, the transverse pupil diverging partial plane array 13 comprises at least two transverse pupil diverging partial planes, the reflectivity of each of which increases with increasing distance from the coupling-in structure 14, the reflectivity of the transverse pupil diverging partial planes: r3 is more than or equal to 5% and less than or equal to 50%, specifically, the reflectivity of each light splitting surface can be arranged in a step shape; the maximum limit of the reflectivity is 50%, the situation that a real scene cannot be seen clearly can be avoided, and a good augmented reality display effect is achieved. Further, the beam splitting surfaces of the transverse pupil-expanding beam splitting surface arrays 13 are parallel to each other and arranged at a certain included angle with the front and rear surfaces of the optical waveguide element 10.

In the embodiment of the present invention, the reflectivities of the coupling-in beam-splitting surface 11, the longitudinal pupil-expanding beam-splitting surface array 12 and the transverse pupil-expanding beam-splitting surface array 13 can be realized by different coating designs, or can also be realized by rotating the optical axis of the polarizer or the wire grid; the optical waveguide element 10 may be made of a transparent material such as glass or resin, and specifically, the manufacturing process and process materials of the optical waveguide element 10 may be set according to actual needs, and need not be limited by the embodiment of the present invention.

The incoupling structure 14 is disposed on the light incident side of the incoupling splitting surface 11, and is used for incoupling the incident light into the optical waveguide element 10; preferably, the coupling-in structure 14 is a triangular prism with a specific inclination angle, which is disposed on the surface of the optical waveguide element and disposed on the light-incident side of the light-splitting surface 11, and specifically, the coupling-in structure 14 can be selected according to actual needs, and does not need to be limited by the embodiments of the present invention.

Example two

An optical waveguide component according to an embodiment of the present invention is provided, and fig. 3 and 4, fig. 3 illustrates a structure and an optical path of an optical waveguide component according to an embodiment of the present invention, fig. 4 is a front view of the optical waveguide component illustrated in fig. 3, where the optical waveguide component 10 includes: symmetrically arranged coupling-in partial planes 11a and 11b, symmetrically arranged longitudinal expanding pupil partial plane arrays 12a and 12b, and a transverse expanding pupil partial plane array 13. Further, the optical waveguide element 10 may further include: coupling-in structure 14.

The symmetrically arranged incoupling light splitting surfaces 11a and 11b are used for receiving incident light, partially transmitting and partially reflecting the incident light for emergence. Specifically, the reflectivities of the symmetrically arranged coupling-in spectroscopic surfaces 11a and 11 b: 90% R1 < 100%, wherein the symmetrically arranged light-in and light-splitting surfaces 11a and 11b are used for partially transmitting and partially reflecting the incident light. It should be noted that the reflectivity of the light-in and light-splitting surfaces 11a and 11b according to the embodiment of the present invention can not be set to 100%, so as to avoid the situation that the central region in the eye-movement range a of the light-out area may have dark bands or low brightness.

The symmetrically arranged longitudinal pupil expanding spectroscopic surface arrays 12a and 12b are respectively and correspondingly arranged on the reflected light emitting sides of the symmetrically arranged coupling-in spectroscopic surfaces 11a and 11b and are used for longitudinally expanding the reflected emergent light rays and then emitting the expanded light rays; preferably, the symmetrically arranged longitudinal pupil expanding facet arrays 12a and 12b comprise at least two longitudinal pupil expanding facets, the reflectivity of each of which increases with increasing distance from the coupling structure 11, the reflectivity of the symmetrically arranged longitudinal pupil expanding facets: r2 is more than or equal to 5% and less than or equal to 100%, and specifically, the reflectivity of each light splitting surface can be arranged in a step shape. Further, the splitting planes of the longitudinal pupil-expanding splitting plane arrays 12a are parallel to each other and to the coupling-in splitting plane 11a, and the splitting planes of the longitudinal pupil-expanding splitting plane arrays 12b are parallel to each other and to the coupling-in splitting plane 11b, and are perpendicular to the front and rear surfaces of the optical waveguide element 10.

In the embodiment of the present invention, after the light emitted from the optical engine 20 enters the optical waveguide element 10 and is partially transmitted and partially reflected "up" and "down" by the combination of the symmetrically arranged coupling-in splitting surfaces and the symmetrically arranged longitudinal pupil-expanding splitting surface arrays (11a and 12a, 11b and 12b), respectively, the light-emitting range of the light is increased in the longitudinal direction by the symmetrically arranged longitudinal pupil-expanding splitting surface arrays 12a and 12b, that is, as shown in fig. 3, the upper edge of the trapezoid a is pulled up and the lower edge of the trapezoid a is pulled down, so that the eye-moving range a is increased in the longitudinal direction, and the coupled-out light can be in the middle area of the near-to-eye display device as much as possible and has a larger eye-moving range.

The horizontal pupil expanding splitting surface array 13 is arranged on the transmission light-emitting sides of the symmetrically arranged coupling-in splitting surfaces 11a and 11b, and on the reflection light-emitting sides of the symmetrically arranged vertical pupil expanding splitting surface arrays 12a and 12b, and is used for emitting light rays exiting after the vertical pupil expanding. Preferably, the transverse pupil-expanding facet array 13 comprises at least two transverse pupil-expanding facets, the reflectivity of each of which increases with increasing distance from the coupling-in structure 11, the reflectivity of which: r3 is more than or equal to 5% and less than or equal to 50%, specifically, the reflectivity of each light splitting surface can be arranged in a step shape; the maximum limit of the reflectivity is 50%, the situation that a real scene cannot be seen clearly can be avoided, and a good augmented reality display effect is achieved. Further, the beam splitting surfaces of the transverse pupil-expanding beam splitting surface arrays 13 are parallel to each other and are arranged at a certain included angle with the front and rear surfaces of the optical waveguide element 10.

In the embodiment of the present invention, the reflectivities of the symmetrically arranged coupling-in facets 11a and 11b, the symmetrically arranged longitudinal pupil-expanding facet arrays 12a and 12b, and the transverse pupil-expanding facet array 13 can be realized by different coating designs, or by rotating the optical axis of the polarizer or the wire grid; the optical waveguide element 10 may be made of a transparent material such as glass or resin, and specifically, the manufacturing process and process materials of the optical waveguide element 10 may be set according to actual needs, and need not be limited by the embodiment of the present invention.

The incoupling structure 14 is disposed on the light incident side of the symmetrically disposed incoupling splitting surfaces 11a and 11b, and is used for incoupling the incident light into the optical waveguide element 10; preferably, the coupling-in structure 14 is a triangular prism with a specific inclination angle, which is disposed on the surface of the optical waveguide element and disposed on the light incident side of the symmetrically disposed coupling-in splitting plane 11, and specifically, the coupling-in structure 14 can be selected according to actual needs and does not need to be limited by the embodiments of the present invention.

EXAMPLE III

An embodiment of the present invention provides a near-eye display device, please refer to fig. 5, which shows a structure of a near-eye display device provided in an embodiment of the present invention, where the near-eye display device 100 includes: the optical device 20 and the optical waveguide device 10 according to the first or second embodiment, the light incident side of the optical waveguide device 10 is disposed on the light emergent side of the optical device 20, and the center of the eye movement range of the light emitted after two-dimensional pupil expansion of the optical waveguide device 10 is consistent with the center of the waveguide sheet.

It should be noted that, in the embodiment of the present invention, the near-eye display device 100 is exemplified by AR glasses, in practical applications, the near-eye display device 100 may also be in other forms, such as a helmet, and specifically, may be designed according to practical applications, and is not limited by the embodiment of the present invention.

Different from the area of the near-eye display device in the market, where the eye movement range a is usually located below the lenses of the near-eye display device, such as AR glasses, the near-eye display device 100 adopting the embodiment of the present invention can "pull up" the upper edge of the trapezoid a due to the optical waveguide element 10, so that the light coupled out from the optical waveguide element 10 can exit from most of the area of the lenses of the AR glasses, so that when a manufacturer designs the optical engine 20 and the program in the optical engine 20, the center of the image can be designed according to the visual effect of eye level-up, the design difficulty of the glasses is reduced, the light can be coupled into the eyes from the same height as the pupils of the eyes, and the whole near-eye display device 100 is more in line with the ergonomic design. Therefore, when the optical waveguide device 10 provided in the first or second embodiments of the present invention is applied to the near-eye display device 100, the optical bench 20 can be effectively reduced in size while the field angle and the eye movement range are significantly increased.

In some embodiments, please refer to fig. 6, which shows a structure of the optical engine in the near-eye display device shown in fig. 5, wherein the optical engine 20 includes, in order according to the light emitting direction: the light source 21, the collimating lens group 22, the light splitting structure 23, the MEMS galvanometer 24, and the relay lens 25, wherein the light incident side of the optical waveguide element 10 is disposed on the light emergent side of the relay lens 25.

Specifically, the light source 21 is an RGB laser light source, and the collimating lens group 22 and the light splitting structure 23 include three, which are respectively and sequentially disposed in the light emitting direction of R, G, B three laser light sources. The light splitting structure 23 may be a light splitting plate or a light splitting prism having wavelength selective transmittance for the RGB light source. The MEMS galvanometer 24 may be a two-dimensional galvanometer or a combination of two one-dimensional galvanometers. The relay lens 25 is composed of two symmetrical lenses or a plurality of lens groups.

During operation, divergent light emitted by the light source 21 is collimated into parallel light after passing through the collimating lens group 22, three beams of RGB parallel light are respectively incident on the corresponding light splitting structures 23 to synthesize a beam of parallel light, the parallel light is incident on the rapidly vibrating MEMS galvanometer 24 to implement imaging scanning, and finally, the imaging light is converted into convergent parallel light by the relay lens 25 through a mirror image of divergent parallel light beams with different fields of view, so that the convergent parallel light is totally incident into the coupling structure 14 of the optical waveguide element 10 which is far away.

In other embodiments, the optical engine 20 may also be another light source or an image source, and specifically, the structure, the type, and the like of the optical engine can be set according to actual needs, and need not be limited by the embodiments of the present invention.

The embodiment of the utility model provides an optical waveguide element which is provided with a longitudinal pupil expanding splitting surface array and a transverse pupil expanding splitting surface array and is used for realizing two-dimensional pupil expanding, the eye movement range is further increased in the longitudinal direction by arranging coupling splitting surfaces at the light inlet sides of the longitudinal pupil expanding splitting surface array and the transverse pupil expanding splitting surface array or by arranging symmetrically arranged coupling splitting surfaces and symmetrically arranged longitudinal pupil expanding splitting surface arrays, and the center of the eye movement range of light rays emitted from a pupil can be basically kept consistent with the height of the center of a waveguide sheet when the optical waveguide element is applied to a near-eye display device.

It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the utility model, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the utility model as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An optical waveguide component, comprising:

the light-splitting surface is used for receiving incident light and partially transmitting and emitting, partially reflecting and emitting or totally reflecting the incident light;

the longitudinal pupil expanding and light splitting surface array is arranged on the reflected light emitting side of the coupling-in and light splitting surface and is used for longitudinally expanding the partially reflected and emitted light rays and then emitting the light rays;

the transverse pupil expanding splitting surface array is arranged on the transmission light outlet side of the coupling splitting surface and on the reflection light outlet side of the longitudinal pupil expanding splitting surface array, and is used for emitting the light rays which are emitted by partial transmission and the light rays which are emitted after the longitudinal pupil expanding.

2. The optical waveguide element according to claim 1, further comprising:

reflectance of the coupling-in spectroscopic surface: r1 is more than or equal to 90% and less than or equal to 100%, wherein,

when the reflectivity R1 of the light-coupling-in and light-splitting surface is less than 100%, the light-coupling-in and light-splitting surface is used for partially transmitting and partially reflecting the incident light,

when the reflectance R1 of the light-splitting surface is 100%, the light-splitting surface is used to totally reflect the incident light.

3. An optical waveguide component, comprising:

the symmetrically arranged coupling-in light splitting surfaces are used for receiving incident light, partially transmitting and emitting the incident light and partially reflecting and emitting the incident light;

the symmetrically arranged longitudinal pupil expanding splitting surface arrays are respectively and correspondingly arranged on the reflected light emitting sides of the symmetrically arranged coupling-in splitting surfaces and are used for longitudinally expanding the reflected emergent light rays and then emitting the expanded light rays;

the light source comprises a transverse pupil expanding splitting surface array, a light source and a light source, wherein the transverse pupil expanding splitting surface array is arranged on a transmission light outlet side of a coupling-in splitting surface which is symmetrically arranged, and the reflection light outlet side of a longitudinal pupil expanding splitting surface array which is symmetrically arranged is used for emitting light rays which are emitted after a longitudinal pupil expanding.

4. The optical waveguide element according to claim 3, further comprising:

the reflectivity of the symmetrically arranged coupling-in splitting surface is as follows: r1 is more than or equal to 90% and less than 100%.

5. The optical waveguide element according to any one of claims 1 to 4, further comprising:

and the coupling-in structure is arranged on the light inlet side of the coupling-in light splitting surface or the symmetrically arranged coupling-in light splitting surface and is used for coupling the incident light into the optical waveguide element.

6. The optical waveguide element according to claim 5,

the coupling-in structure is a triangular prism with a specific dip angle, is attached to the surface of the optical waveguide element and is arranged on the light-in side of the coupling-in light splitting surface or the symmetrically arranged coupling-in light splitting surface.

7. The optical waveguide element according to claim 5,

the longitudinal pupil expanding splitting surface array comprises at least two longitudinal pupil expanding splitting surfaces, the reflectivity of each longitudinal pupil expanding splitting surface is increased along with the increase of the distance from the coupling-in structure,

the reflectivity of the longitudinal pupil expanding splitting surface is as follows: r2 is more than or equal to 5% and less than or equal to 100%.

8. The optical waveguide element according to claim 5,

the transverse pupil expanding splitting surface array comprises at least two transverse pupil expanding splitting surfaces, the reflectivity of each transverse pupil expanding splitting surface is increased along with the increase of the distance from the coupling-in structure,

the reflectivity of the transverse pupil expanding splitting surface is as follows: r3 is more than or equal to 5 percent and less than or equal to 50 percent.

9. A near-eye display device, comprising:

an optical bench, and an optical waveguide element according to any of the preceding claims 1-8, the light entry side of the optical waveguide element being arranged at the light exit side of the optical bench,

the center of the eye movement range of the light emitted after passing through the two-dimensional pupil expansion of the optical waveguide element is consistent with the center of the waveguide piece.

10. The near-eye display device of claim 9,

the ray apparatus includes that it sets gradually according to the light-emitting direction: a light source, a collimating lens group, a light splitting structure, an MEMS galvanometer and a relay lens,

the light incident side of the optical waveguide element is arranged on the light emergent side of the relay lens.

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