Device for augmented reality display and system for implementing augmented reality display

Abstract

The present invention relates to image display technology, and in particular to a device for augmented reality display and a system for implementing augmented reality display comprising the device. The device for augmented reality display comprises: a light waveguide lens; a first optical functional structure, a second optical functional structure, a third optical functional structure, and a fourth optical functional structure disposed on a surface of the light waveguide lens, wherein the second optical functional structure and the third optical functional structure are located between the first optical functional structure and the fourth optical functional structure; wherein light comprising a first electric field component and a second electric field component is coupled into the light waveguide lens via the first optical functional structure; under the action of the first optical functional structure, the first electric field component and the second electric field component of the light are reflected in the light waveguide lens along a first direction and a second direction, respectively, by total reflection to reach the second optical functional structure and the third optical functional structure; and under the action of the second optical functional structure and the third optical functional structure, the light is reflected by total reflection to reach the fourth optical functional structure and is emitted from the fourth optical functional structure.

Description

Technical Field

[0001] The present invention relates to image display technology, and in particular to a device for augmented reality display and a system comprising the device for implementing augmented reality display. Background Art

[0002] Augmented reality (AR) is a new display technology that seamlessly integrates real-world and virtual world information. It displays not only real-world information but also virtual information simultaneously, complementing and superimposing the two. In visual augmented reality, a helmet-mounted display (HMD) presents the user with a hybrid image that overlays the real world with computer-generated virtual images.

[0003] Most of the current mainstream near-eye augmented reality display devices use the optical waveguide principle. For example, in a typical augmented reality display device, the image on the micro-display spatial light modulator (such as LCOS) is coupled to the optical waveguide through three holographic gratings, and then transmitted separately through the three optical waveguides. Finally, it is output through the corresponding holographic grating coupling in front of the human eye to be projected to the human eye. In order to achieve color projection, a multi-layer optical waveguide method can be used. However, augmented reality display devices based on the above working principle have multiple disadvantages. For example, the efficiency is uneven within the field of view, resulting in bright and dark displays, which affects the experience effect. Summary of the Invention

[0004] An object of the present invention is to provide a device for augmented reality display, which has the advantages of good balance of light expansion efficiency within the exit pupil range.

[0005] An apparatus for augmented reality display according to one aspect of the present invention comprises:

[0006] Light guide lenses; and

[0007] The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are arranged on the surface of the optical waveguide lens,

[0008] Wherein, the second optical functional structure and the third optical functional structure are located between the first optical functional structure and the fourth optical functional structure,

[0009] The light containing the first electric field component and the second electric field component is coupled into the optical waveguide lens through the first optical functional structure, and a first light beam having the first electric field component and a second light beam having the second electric field component are formed under the action of the first optical functional structure. The first light beam and the second light beam are respectively reflected in the optical waveguide lens along the first direction and the second direction, and reach the second optical functional structure and the third optical functional structure through total reflection. Under the action of the second optical functional structure and the third optical functional structure, they reach the fourth optical functional structure through total reflection and are emitted from the fourth optical functional structure.

[0010] The first electric field component and the second electric field component are parallel to a first direction and a second direction respectively, and the first light beam and the second light beam have the same wavelength range.

[0011] Preferably, in the above device, the first optical functional structure and the fourth optical functional structure are two-dimensional gratings, and the second optical functional structure and the third optical functional structure are one-dimensional gratings.

[0012] Preferably, in the above device, the one-dimensional grating is one of the following: a tilted grating, a rectangular grating, a blazed grating and a volume grating.

[0013] Preferably, in the above device, the first optical functional structure is arranged in the corner area of the surface of the optical waveguide lens, the second optical functional structure and the third optical functional structure are arranged along the edge of the optical waveguide lens adjacent to the first optical functional structure, and the fourth optical functional structure is arranged in the central area of the optical waveguide lens.

[0014] Preferably, in the above device, the fourth optical functional structure is rectangular, and the longitudinal lengths of the second optical functional structure and the third optical functional structure match the size of the rectangle.

[0015] Preferably, in the above device, the first direction is substantially perpendicular to the second direction.

[0016] Preferably, in the above device, the first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are located on the same surface of the optical waveguide lens.

[0017] Another object of the present invention is to provide a system for realizing augmented reality display, which has advantages such as good balance of light expansion efficiency within the exit pupil range.

[0018] A system for implementing augmented reality display according to another aspect of the present invention comprises:

[0019] an image source configured to provide light comprising a first electric field component and a second electric field component; and

[0020] At least one image presentation device, each of the image presentation devices comprising:

[0021] Light guide lenses; and

[0022] The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are arranged on the surface of the optical waveguide lens,

[0023] Wherein, the second optical functional structure and the third optical functional structure are located between the first optical functional structure and the fourth optical functional structure,

[0024] The light is coupled into the optical waveguide lens through the first optical functional structure, and under the action of the first optical functional structure, a first light beam having the first electric field component and a second light beam having the second electric field component are formed. The first light beam and the second light beam are respectively reflected in the optical waveguide lens along the first direction and the second direction, and reach the second optical functional structure and the third optical functional structure through total reflection. Under the action of the second optical functional structure and the third optical functional structure, the first light beam and the second light beam reach the fourth optical functional structure through total reflection and are emitted from the fourth optical functional structure.

[0025] The first electric field component and the second electric field component are parallel to a first direction and a second direction respectively, and the first light beam and the second light beam have the same wavelength range.

[0026] According to embodiments of the present invention, by providing two optically functional structures on the surface of the waveguide lens, respectively for expanding the two electric field components of light in two directions, uniform light expansion can be achieved within the field of view. Furthermore, by placing a fourth optically functional structure in the center of the waveguide lens, the exit pupil window can be enlarged by increasing the area occupied by the fourth optically functional structure. Furthermore, the image presentation device according to the above-described embodiments of the present invention has a simple and compact structure, which facilitates a reduction in the overall size of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A and 1B 1 and 2 are respectively a plan view and a perspective view of a device for augmented reality display according to an embodiment of the present invention.

[0028] Figures 2A-2C Shows the application Figure 1A and 1B Schematic diagram of optical diffraction of a one-dimensional grating in the embodiment shown, wherein: Figure 2A The figure shows the optical diffraction diagram of a rectangular grating. Figure 2BThe figure shows the optical diffraction diagram of the tilted grating. Figure 2C Shown is a schematic diagram of optical diffraction of a blazed grating.

[0029] Figure 3 Shows the application Figure 1A and 1B Example of a two-dimensional grating for the illustrated embodiment.

[0030] Figure 4 for Figure 1A and 1B The cross-sectional view of the device for augmented reality display shown in FIG. Figure 1B In the XZ plane.

[0031] Figure 5 for Figure 1A and 1B The cross-sectional view of the device for presenting an image is shown, wherein the cross-sectional view is located at Figure 1B In the YZ plane.

[0032] Figure 6 for Figure 1A and 1B The cross-sectional view of the device for augmented reality display shown in FIG. Figure 1B In the YZ plane.

[0033] Figure 7 for Figure 1A and 1B The cross-sectional view of the device for presenting an image is shown, wherein the cross-sectional view is located at Figure 1B In the XZ plane.

[0034] Figure 8 FIG. 1 is a schematic diagram of a system for implementing augmented reality display according to another embodiment of the present invention. DETAILED DESCRIPTION

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] According to one aspect of the present invention, by providing two optical functional structures (e.g., one-dimensional gratings) on the surface of an optical waveguide lens, respectively used to expand the two electric field components of light in two directions (e.g., two mutually perpendicular directions), balanced light expansion within the field of view can be achieved.

[0037] Figure 1A and 1B 1 and 2 are respectively a plan view and a perspective view of a device for augmented reality display according to an embodiment of the present invention. For example, the device for augmented reality display of this embodiment may be in the form of eyeglass lenses.

[0038] See also Figure 1A and 1B The device 10 for augmented reality display of this embodiment includes a light waveguide lens 110 and a first optical functional structure 121, a second optical functional structure 122, a third optical functional structure 123 and a fourth optical functional structure 124 arranged on the surface of the light waveguide lens.

[0039] Optionally, the first optical functional structure 121, the second optical functional structure 122, the third optical functional structure 123 and the fourth optical functional structure 124 are nanostructures, which can interact with components of various wavelength bands of the incident light (such as red light component, blue light component and green light component) to form diffracted light.

[0040] For example, the nanostructures of the first and fourth optical functional structures 121 and 124 are two-dimensional gratings; the third and fourth optical functional structures 123 and 124 are one-dimensional gratings. The period of the two-dimensional grating is consistent with that of the one-dimensional grating, for example, it can be 350nm to 450nm. The grating orientation of each optical functional structure is adjusted to ensure that light propagates in the desired direction. In addition, the diffraction efficiency of the propagated light of each wavelength band is adjusted by adjusting parameters such as the grating depth and duty cycle of each optical functional structure, thereby promoting or ensuring that the color image provided by the superposition of light of different wavelength bands emitted from the fourth optical functional structure 124 has good perceptual visual quality.

[0041] In addition, optionally, these optical functional structures are located on the same surface of the light waveguide lens 110 or on different surfaces of the light waveguide lens 110 .

[0042] exist Figure 1A and 1B In the illustrated embodiment, the first optical functional structure 121 is disposed at the upper left corner of the optical waveguide lens surface. It is configured to couple incident light containing a first electric field component and a second electric field component into the optical waveguide lens 110, and is therefore also referred to as a coupling region. The incident light enters the first optical functional structure 121 at a certain incident angle, and is diffracted by the first optical functional structure 121 to form a first light beam having a first electric field component and a second light beam having a second electric field component. The first light beam and the second light beam are respectively directed in a first direction ( Figure 1B The X direction shown in ) and the second direction ( Figure 1B The first light beam and the second light beam are transmitted in the optical waveguide lens 110 in the Y direction shown in FIG. By making the light enter the optical waveguide lens at a suitable angle, the first light beam and the second light beam can be transmitted in a total reflection manner.

[0043] In this embodiment, for example, the light incident on the first optically functional structure 121 includes multiple wavelengths (e.g., a red light component, a blue light component, and a green light component). After diffraction by the first optically functional structure 121, the light comprising multiple wavelengths forms two beams of light having mutually orthogonal propagation directions and mutually orthogonal electric field components, with the electric field component of each beam of light being parallel to its direction of travel. Furthermore, the two mutually orthogonal beams of light have the same wavelength range or spectrum; for example, the two beams of light contain the same red light component, blue light component, and green light component.

[0044] See also Figure 1A and 1B The second optical functional structure 122 and the third optical functional structure 123 are arranged along the two sides of the optical waveguide lens 110 adjacent to the upper left corner, and the fourth optical functional structure 124 is arranged in the central area of the optical waveguide lens 110. Figure 1B As shown, under the action of the second optical functional structure 122, the first light beam propagates within the light waveguide lens 110 parallel to the Y direction and reaches the fourth optical functional structure 124 through total internal reflection. On the other hand, under the action of the third optical functional structure 123, the second light beam propagates within the light waveguide lens 110 parallel to the X direction and reaches the fourth optical functional structure 124 through total internal reflection. Therefore, the second and third optical functional structures 122 and 123 can also be referred to as turning regions. The fourth optical functional structure 124 is configured to guide the first and second light beams out of the light waveguide lens 110, thereby presenting an augmented reality image to the user. Therefore, the optical functional structure 124 can also be referred to as an outcoupling region.

[0045] exist Figure 1A and 1B In the device 3 for augmented reality display shown in FIG, the problem of uneven efficiency within the field of view is overcome. Specifically, Figure 1BAs shown, after the incident light reaches the first optically functional structure 121, diffraction forms a first light beam that propagates along the extension direction of the second optically functional structure 122 (from left to right in the figure) and a second light beam that propagates along the extension direction of the third optically functional structure 123 (from top to bottom in the figure). After entering the second optically functional structure 122, the first light beam deflects and enters the fourth optically functional structure 124 parallel to the Y direction. If the second light beam does not deflect through the third optically functional structure 123 and enter the fourth optically functional structure 124 along the X direction, the image emitted from the fourth optically functional structure 124 will be significantly brighter in the center and significantly darker on both sides in the X direction, indicating an uneven spread of light within the field of view. Conversely, in this embodiment, the introduction of the third optically functional structure 123 to form a second light beam that enters the fourth optically functional structure 124 along the X direction can compensate for the darker areas on both sides in the X direction, thereby reducing the overall brightness and darkness contrast of the image.

[0046] It should be pointed out that Figure 1A and 1B The positions of the first to fourth optical functional structures on the optical waveguide lens are merely exemplary. In practice, other arrangements that allow the first electric field component and the second electric field component of the light to extend in different directions are also feasible. For example, the first optical functional structure 121 can be placed in the upper center of the optical waveguide lens 110, and the second optical functional structure 122 and the third optical functional structure 123 can be placed along two parallel sides of the optical waveguide lens 110 (e.g., Figure 1B and the fourth optical functional structure 124 is disposed in the central area of the light waveguide lens 110.

[0047] In this embodiment, the fourth optical functional structure 124 is rectangular or trapezoidal, and the longitudinal lengths of the second optical functional structure 122 and the third optical functional structure 123 match the size of the rectangle or trapezoid, thereby maximizing the light expansion efficiency.

[0048] In this embodiment, since the fourth optical functional structure 124 is disposed at the center of the light waveguide lens, the exit pupil window can be enlarged by increasing the area occupied by the fourth optical functional structure 124 .

[0049] In this embodiment, illustratively, the first optical functional structure 121 and the fourth optical functional structure 124 are implemented in the form of two-dimensional gratings, while the second optical functional structure 122 and the third optical functional structure 123 are implemented in the form of one-dimensional gratings. The period of the two-dimensional grating is consistent with that of the one-dimensional grating, which is, for example, 350nm to 450nm. The grating orientation of each optical functional structure is adjusted to ensure that light propagates in the desired direction. In addition, the diffraction efficiency of the propagated light of each wavelength band is adjusted by adjusting parameters such as the grating depth and duty cycle of each optical functional structure, thereby promoting or ensuring that the color image provided by the superposition of light of different wavelength bands emitted from the fourth optical functional structure 124 has good perceptual visual quality. Optionally, the one-dimensional grating can be selected from one or more of the following groups: tilted grating, rectangular grating, blazed grating, and volume grating.

[0050] Figures 2A-2C Shows the application Figure 1A and 1B An example of a one-dimensional grating of the illustrated embodiment, wherein Figure 2A The figure shows the optical diffraction diagram of a rectangular grating. Figure 2B The figure shows the optical diffraction diagram of the tilted grating. Figure 2C Shown is a schematic diagram of optical diffraction of a blazed grating.

[0051] In this embodiment, the orientation of the one-dimensional grating is determined by the orientation of the two-dimensional grating array used as the first optical functional structure, and the period is determined by the period of the two-dimensional grating arrays of the first and fourth optical functional structures. Optionally, the total phase sum of the first to fourth optical functional structures is zero to achieve phase matching.

[0052] refer to Figure 2A The rectangular grating 221A is formed on the surface of the optical waveguide lens 210. By selecting the structural parameters such as the grating height, width, and period, the light incident on the grating surface at a certain angle is diffracted by the rectangular grating. The diffracted light includes the zero-order diffraction light T0, the -1st-order diffraction light T -1 And the first-order diffracted light T1. Figure 2A In the case shown, the 0th order diffraction efficiency is the highest, the -1st order diffraction efficiency is the second, and the 1st order diffraction efficiency is the lowest. Figure 2A The rectangular grating 221A forms the −1st order diffraction light, which then completes its propagation within the optical waveguide lens 210 .

[0053] refer to Figure 2B The tilted grating 221B is formed on the surface of the optical waveguide lens 210. By selecting the structural parameters such as the grating height, width, period and tilt angle, the light incident on the grating surface at a certain angle is diffracted by the tilted grating. Similarly, the diffracted light includes the zero-order diffraction light T0, the -1st-order diffraction light T -1And the first-order diffracted light T1. Figure 2B In the case shown, -1 order diffraction efficiency is the highest, zero order diffraction efficiency is the second, and 1 order diffraction efficiency is the lowest. Figure 2B The tilted grating shown forms -1st-order diffracted light, which then propagates within the optical waveguide lens 210. Furthermore, by optimizing one or more of the structural parameters, such as grating height, width, period, and tilt angle, wavelength selection can be achieved. Specifically, the diffraction efficiency of light within a certain wavelength range can be increased, while the diffraction efficiency of light within other wavelength ranges can be reduced.

[0054] refer to Figure 2C The blazed grating 221C is formed on the surface of the optical waveguide lens 210. By selecting the structural parameters such as the grating height, period and blazed angle, the light incident on the grating surface at a certain angle is diffracted by the blazed grating. Similarly, the diffracted light includes the zero-order diffraction light T0, the -1st-order diffraction light T -1 And the first-order diffracted light T1. Figure 2C In the case shown, the -1 order diffraction efficiency is the highest, and the 0th and 1st order diffraction efficiencies are the lowest. Figure 2C The tilted grating forms -1 order diffraction light, which then propagates in the optical waveguide lens 210. In addition, wavelength selection can be achieved by optimizing one or more of the structural parameters such as grating height, period and blaze angle.

[0055] Figure 3 Shows the application Figure 1A and 1B An example of a two-dimensional grating according to the embodiment shown. Figure 3 As shown, the two-dimensional grating is a two-dimensional array. Taking the case of the first optical functional structure as an example, the incident light enters the first optical functional structure at a certain angle. By designing the parameters such as the orientation angle and period of the two-dimensional array, bidirectional angular diffraction can be achieved. The two beams of diffracted light are respectively transmitted to the second optical functional structure 122 and the third optical functional structure 123, realizing the bidirectional light transmission function.

[0056] The following description Figure 1A and 1B The working principle of the device for augmented reality display shown.

[0057] Figure 4 for Figure 1A and 1B The cross-sectional view of the device for augmented reality display shown in FIG. Figure 1B In the XZ plane.

[0058] See also Figure 4The light emitted from the image source 20 and containing the first electric field component and the second electric field component reaches the first optical functional structure 121. After being diffracted by the first optical functional structure 121, a first light beam containing the first electric field component and a second light beam containing the second component are formed. Figure 4 , the first light beam is introduced into the optical waveguide lens 110 and propagates parallel to the X direction. By selecting appropriate structural parameters for the first optical functional structure 121, the light can be totally reflected inside the optical waveguide lens 110, and the superposition of the light beams of different wavelengths emitted from the fourth optical functional structure 124 can be promoted or ensured, so that the color image provided has good visual quality. Figure 4 As shown, the first optical functional structure 121 and the second optical functional structure 122 are spaced apart from each other in parallel to the X direction. The light undergoing total reflection reaches the second optical functional structure 122 from the first optical functional structure 121 by means of total reflection.

[0059] Figure 5 for Figure 1A and 1B The cross-sectional view of the device for presenting an image is shown, wherein the cross-sectional view is located at Figure 1B In the YZ plane.

[0060] refer to Figure 5 Combined with Figure 4 It can be seen that after the first light beam reaches the second optical functional structure 122, it continues to be totally reflected in the optical waveguide lens 110, but the propagation direction changes from being parallel to the X direction to being parallel to the Y direction. Figure 5 As shown, the second optical functional structure 122 guides the first light beam to the fourth optical functional structure 124. Under the diffraction effect of the fourth optical functional structure 124, the first light beam is then emitted from the optical waveguide lens 110.

[0061] Figure 6 for Figure 1A and 1B The cross-sectional view of the device for augmented reality display shown in FIG. Figure 1B In the YZ plane.

[0062] See also Figure 6 The light emitted from the image source 20 and containing the first electric field component and the second electric field component reaches the first optical functional structure 121. After being diffracted by the first optical functional structure 121, a first light beam having the first electric field component and a second light beam having the second electric field component are formed. Figure 6, the second light beam is introduced into the optical waveguide lens 110 and propagates parallel to the Y direction. By selecting appropriate structural parameters for the first optical functional structure 121, the light can be totally reflected inside the optical waveguide lens 110, and the color image provided by the superposition of the light beams of different wavelengths emitted from the fourth optical functional structure 124 can be promoted or ensured to have good visual quality. Figure 6 As shown, the first optical functional structure 121 and the third optical functional structure 123 are spaced apart in parallel to the Y direction. The light undergoing total reflection reaches the third optical functional structure 123 from the first optical functional structure 121 by means of total reflection.

[0063] Figure 7 for Figure 1A and 1B The cross-sectional view of the device for presenting an image is shown, wherein the cross-sectional view is located at Figure 1B In the XZ plane.

[0064] refer to Figure 7 Combined with Figure 6 It can be seen that after the second light beam reaches the third optical functional structure 123, it continues to be totally reflected in the optical waveguide lens 110, but the propagation direction changes from being parallel to the Y direction to being parallel to the X direction. Figure 6 As shown, the third optical functional structure 123 guides the second light beam to the fourth optical functional structure 124. Under the diffraction effect of the fourth optical functional structure 124, the second light beam is then emitted from the optical waveguide lens 110 together with the light beam from the second optical functional structure 122.

[0065] Figure 8 FIG. 1 is a schematic diagram of a system for implementing augmented reality display according to another embodiment of the present invention.

[0066] like Figure 8 The system 1 shown includes image presentation devices 10A and 10B and an image source 20. The image source 20 is configured to provide light containing a first electric field component and a second electric field component to the image presentation devices 10A and 10B. The image presentation devices 10A and 10B are configured to present an augmented reality image to a user. In this embodiment, for example, the image presentation devices 10A and 10B can be configured as described above with the aid of Figure 1A 、 Figure 1B 、 Figures 2A-2C and Figure 3-7 The embodiment described is implemented.

[0067] Taking the image presentation device 10A as an example, it includes a light guide lens 110A and a first optical functional structure 121A, a second optical functional structure 122A, a third optical functional structure 123A, and a fourth optical functional structure 124A disposed on the surface of the light guide lens. The first optical functional structure 121A, the second optical functional structure 122A, the third optical functional structure 123A, and the fourth optical functional structure 124A are located on the same surface of the light guide lens 110. The first optical functional structure 121A is located in the upper right corner of the light guide lens surface, the second optical functional structure 122A and the third optical functional structure 123A are located along two edges of the light guide lens 110A adjacent to the upper right corner, and the fourth optical functional structure 124A is located in the center of the light guide lens 110A.

[0068] exist Figure 8 In the illustrated system, the first optically functional structure 121A is configured to couple incident light containing a first electric field component and a second electric field component into the optical waveguide lens 110, causing a first light beam containing the first electric field component and a second light beam containing the second electric field component to propagate within the optical waveguide lens 110A along a first direction (the longitudinal extension direction of the first optically functional structure 122A in the figure) and a second direction (the longitudinal extension direction of the first optically functional structure 123A in the figure, which is substantially perpendicular to the first direction), respectively. By causing light to enter the optical waveguide lens at a suitable angle, the first and second light beams can propagate via total internal reflection.

[0069] After reaching the second optically functional structure 122A, the first light beam propagates along the second direction within the light waveguide lens 110A under the influence of the second optically functional structure 122A, and then reaches the fourth optically functional structure 124A through total internal reflection. Conversely, after reaching the third optically functional structure 123A, the second light beam propagates along the first direction within the light waveguide lens 110A under the influence of the third optically functional structure 123A, and then reaches the fourth optically functional structure 124A through total internal reflection. The fourth optically functional structure 124A is configured to guide the first and second light beams out of the light waveguide lens 110, thereby presenting an augmented reality image to the user.

[0070] Exemplarily, the first optical functional structure 121A and the fourth optical functional structure 124A are implemented in the form of two-dimensional gratings, while the second optical functional structure 122A and the third optical functional structure 123A are implemented in the form of one-dimensional gratings. Optionally, the one-dimensional gratings can be selected from one or more of the following groups: tilted gratings, rectangular gratings, blazed gratings, and volume gratings.

[0071] The image presentation device 10B includes a light waveguide lens 110B and a first optical functional structure 121B, a second optical functional structure 122B, a third optical functional structure 123B and a fourth optical functional structure 124B arranged on the surface of the light waveguide lens. Its structure and working principle are similar to those of the image presentation device 10A and will not be repeated here.

[0072] See also Figure 8 The system 1 for realizing augmented reality display further includes a connecting component 10C, which connects the optical waveguide lenses 110A and 110B together.

[0073] The principles and preferred embodiments of the present invention have been described above. However, the present invention should not be construed as limited to the specific embodiments discussed. The preferred embodiments described above should be considered illustrative rather than restrictive, and it should be understood that variations may be made in these embodiments by those skilled in the art without departing from the scope of the present invention as defined in the following claims.

Claims

1. A device for augmented reality display, characterized in that: Include: Optical waveguide lenses; as well as The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are arranged on the surface of the optical waveguide lens, The fourth optical functional structure is arranged in the central area of the optical waveguide lens, the first optical functional structure is arranged in the corner area of the surface of the optical waveguide lens, and the second optical functional structure and the third optical functional structure are arranged along two adjacent sides of the fourth optical functional structure. The light containing the first electric field component and the second electric field component is coupled into the optical waveguide lens through the first optical functional structure. Under the action of the first optical functional structure, a first light beam having the first electric field component and a second light beam having the second electric field component are formed. The first light beam and the second light beam are respectively reflected in the optical waveguide lens along the first direction and the second direction by total reflection to reach the second optical functional structure and the third optical functional structure. Under the action of the second optical functional structure and the third optical functional structure, they are reflected by total reflection to reach the fourth optical functional structure and emerge from the fourth optical functional structure. The first electric field component and the second electric field component are parallel to a first direction and a second direction respectively, and the first light beam and the second light beam have the same wavelength range.

2. The device for augmented reality display according to claim 1, wherein: The first optical functional structure and the fourth optical functional structure are two-dimensional gratings, and the second optical functional structure and the third optical functional structure are one-dimensional gratings.

3. The device for augmented reality display according to claim 2, wherein: The one-dimensional grating is one of the following: a tilted grating, a rectangular grating, a blazed grating and a volume grating.

4. The device for augmented reality display according to claim 2, wherein: The optical waveguide lens is rectangular or trapezoidal.

5. The device for augmented reality display according to claim 4, wherein: The longitudinal lengths of the second optical functional structure and the third optical functional structure match the size of the rectangle or trapezoid.

6. The device for augmented reality display according to claim 1, wherein: The first direction is substantially perpendicular to the second direction.

7. The device for augmented reality display according to claim 1, wherein: The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are located on the same surface of the optical waveguide lens.

8. A system for realizing augmented reality display, characterized in that: Include: an image source configured to provide light comprising a first electric field component and a second electric field component; as well as At least one image presentation device, each of the image presentation devices comprising: Light guide lenses; and The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are arranged on the surface of the optical waveguide lens, wherein the fourth optical functional structure is arranged in the central area of the optical waveguide lens, the first optical functional structure is arranged in the corner area of the surface of the optical waveguide lens, and the second optical functional structure and the third optical functional structure are arranged along two adjacent sides of the fourth optical functional structure. The light is coupled into the optical waveguide lens through the first optical functional structure, and under the action of the first optical functional structure, a first light beam having the first electric field component and a point light beam having the second electric field component are formed. The first light beam and the second light beam are respectively reflected in the optical waveguide lens along the first direction and the second direction, and reach the second optical functional structure and the third optical functional structure through total reflection. Under the action of the second optical functional structure and the third optical functional structure, the first light beam and the second light beam reach the fourth optical functional structure through total reflection and are emitted from the fourth optical functional structure. The first electric field component and the second electric field component are parallel to a first direction and a second direction respectively, and the first light beam and the second light beam have the same wavelength range.

9. The system of claim 8, wherein: The first optical functional structure and the fourth optical functional structure are two-dimensional gratings, and the second optical functional structure and the third optical functional structure are one-dimensional gratings.

10. The system of claim 9, wherein: The one-dimensional grating is one of the following: a tilted grating, a rectangular grating, a blazed grating and a volume grating.

11. The system of claim 9, wherein: The optical waveguide lens is rectangular or trapezoidal.

12. The system of claim 11, wherein: The longitudinal lengths of the second optical functional structure and the third optical functional structure match the size of the rectangle or trapezoid.

13. The system of claim 8, wherein: The first direction is substantially perpendicular to the second direction.

14. The system of claim 8, wherein: The first optical functional structure, the second optical functional structure, the third optical functional structure and the fourth optical functional structure are located on the same surface of the optical waveguide lens.

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