CN112444969B - Large-view-field double-layer-depth AR waveguide - Google Patents
Large-view-field double-layer-depth AR waveguide Download PDFInfo
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- CN112444969B CN112444969B CN201910816706.8A CN201910816706A CN112444969B CN 112444969 B CN112444969 B CN 112444969B CN 201910816706 A CN201910816706 A CN 201910816706A CN 112444969 B CN112444969 B CN 112444969B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
Abstract
The invention discloses a large-field double-layer depth AR waveguide, which comprises a first light source, a second light source, an incoupling optical system and two flat optical waveguides, wherein the first light source emits first field image light with a polarization state being a first polarization state and to be presented at a first depth, and simultaneously emits first field image light with a polarization state being a second polarization state and to be presented at a second depth; the second light source emits second field image light with the polarization state being the first polarization state and to be presented at the first depth, and simultaneously emits second field image light with the polarization state being the second polarization state and to be presented at the second depth; the surface of the near-eye side flat optical waveguide close to the human eye side is provided with a polarization dependent lens device. The first polarized light full field-of-view image is focused at a first depth to display the depth image information, and the second polarized light full field-of-view image is at infinity to display the second depth image information while enabling large field-of-view stitching and image display with depth information.
Description
Technical Field
The invention relates to the technical field of waveguide structures, in particular to a large-field-of-view double-layer depth AR waveguide.
Background
The existing near-to-eye display module applied to the field of Augmented Reality (AR) mostly has the problem that the field angle is not large, and the display module based on the waveguide in the prior art is taken as an example: existing waveguide-based display modules typically include an image source, an eyepiece system, an incoupling grating, a waveguide, and an outcoupling grating. After being collimated by an ocular lens system, light beams emitted by an image source are coupled into the waveguide at a certain angle through the coupling-in grating for total reflection transmission, and the coupling-out grating arranged in the waveguide corresponding to the exit pupil position couples out the light beams transmitted in the waveguide to human eyes. As shown in fig. 1. After being collimated by the ocular lens system 2, light beams emitted by the image source 1 are coupled into the waveguide 4 at a certain angle through the coupling grating 3 for total reflection transmission, and the light beams transmitted in the waveguide are coupled out to human eyes by the coupling grating 5 arranged in the waveguide corresponding to the exit pupil position. Since the grating is a very incident angle sensitive element, for the coupled grating, the diffraction efficiency and angle of the light incident on the grating are different, and the maximum diffraction efficiency is obtained at a specific incident angle, and when the incident angle deviates from the specific incident angle, the diffraction efficiency is rapidly reduced (i.e. the grating has almost no diffraction effect on the incident light at the angle, and is nearly transmitted into the grating), as shown in fig. 4, the abscissa of the diffraction efficiency distribution graph of the coupled grating is the angle of the light incident on the grating, and the ordinate is the diffraction efficiency of the grating, and the effective diffraction angle bandwidth of the grating shown in the graph is ± 20 °. The beam propagation diagram shown in fig. 5, wherein ray 1 represents the diffracted path of-20 ° incident light, ray 2 represents the diffracted path of 0 ° incident light, and ray 3 represents the diffracted path of +20 ° incident light; the light 1, the light 2 and the light 3 are coupled into the waveguide for total reflection transmission, and then are coupled out of the waveguide through the coupling grating to be presented to human eyes. Other angles of incident light (i.e. beyond 20 °) have very low diffraction efficiency and the light is nearly transmitted through the grating without any change in angle, as shown by the light 4, which, although it can also be transmitted totally internally in the waveguide, is not diffracted by the outcoupling grating and cannot be outcoupled to the human eye in the waveguide. Therefore, the human eye can observe only a field angle of ± 20 °.
It can be seen in chinese patent CN107024769 that the prior art has thought of using a splicing method to enlarge the field angle, and this splicing method needs to add a group of corresponding input light source modules every time a group of field angles are added, and belongs to hardware stacking type splicing.
How to solve the problem of considering both large visual field and miniaturization of a near-eye display module is a technical problem to be solved urgently in the field.
Disclosure of Invention
The embodiment of the invention provides a large-view-field double-layer depth AR waveguide, which is used for solving the problems of large view field and miniaturization of a near-eye display module and realizing the formation of multi-depth images.
In order to achieve the above object, the present invention provides a large-field double-layer depth AR waveguide, including a first light source, a second light source, an incoupling optical system and two flat optical waveguides, the incoupling optical system and the two flat optical waveguides being arranged in one-to-one correspondence with the light sources, wherein the first light source emits a first field image light whose polarization state is a first polarization state and is to be imaged at a first depth, and simultaneously emits a first field image light whose polarization state is a second polarization state and is to be imaged at a second depth;
the second light source emits second field image light with the polarization state being the first polarization state and to be presented at the first depth, and simultaneously emits second field image light with the polarization state being the second polarization state and to be presented at the second depth;
the two slab optical waveguides include a first slab optical waveguide and a second slab optical waveguide arranged in a stack,
the first plate optical waveguide is provided with a first coupling-in component which is matched with the first light source and couples light beams emitted by the first light source into the first plate optical waveguide and a first coupling-out component which totally couples the light beams which are coupled in by the first coupling-in component and propagate in the first plate optical waveguide out towards the direction of human eyes;
the second plate optical waveguide is provided with a second coupling-in component which is matched with the second light source and couples light beams emitted by the second light source into the second plate optical waveguide and a second coupling-out component which totally couples the light beams which are coupled in by the second coupling-in component and propagate in the second plate optical waveguide out towards the human eye direction;
the incoupling optical systems are configured to collimate and inject light beams emitted from the respective light sources into the corresponding incoupling parts,
the first view field image light with the polarization state being the first polarization state and the second view field image light with the polarization state being the first polarization state are respectively coupled out of corresponding flat optical waveguides through the first coupling-out component and the second coupling-out component and spliced into a first polarization state light full view field image,
the first view field image light with the polarization state of the second polarization state and the second view field image light with the polarization state of the second polarization state are respectively coupled out of corresponding flat optical waveguides through the first coupling-out component and the second coupling-out component and spliced into a second polarization state light full view field image,
taking the plate optical waveguide closer to the human eye from among the first plate optical waveguide and the second plate optical waveguide as a near-eye side plate optical waveguide, and then taking the other plate optical waveguide as a far-eye side plate optical waveguide, a polarization-dependent lens device (PDLD) being disposed on a surface of the near-eye side plate optical waveguide closer to the human eye, an ambient light polarizer being disposed on a surface of the far-eye side plate optical waveguide farther from the human eye side, the polarization-dependent lens device being configured to have a positive focal length with respect to the first polarized state light full-field image and an infinite or substantially infinite focal length with respect to the second polarized state light full-field image, so that the first polarized state light full-field image is focused at a first depth to display the depth image information, and the second polarized state light full-field image is focused at an infinite distance through the polarization-dependent lens device to display the second depth image information;
the ambient light polarizer is used for converting the ambient light into second polarized light, so that the ambient light is not influenced by the PDLD.
For example, displaying a house at a first depth and a mountain at infinity, such a two-layer depth information display can effectively alleviate the vergence conflict. Therefore, large-field splicing and image display with depth information are realized simultaneously.
The first polarization state is S, and the second polarization state is P; or the first polarization state is P, and the second polarization state is S.
Further, the first incoupling component is used for totally coupling the light beams emitted by the first light source and collimated by the corresponding incoupling optical system into the first flat-plate optical waveguide so that the light beams meet the internal total reflection condition of the first flat-plate optical waveguide;
the second coupling-in component is used for coupling all the light beams emitted by the second light source and collimated by the corresponding coupling-in optical system into the second flat-plate optical waveguide so that the light beams meet the internal total reflection condition of the second flat-plate optical waveguide.
The first coupling-out member causes the light beam coupled into the first slab optical waveguide by the first coupling-in member not to satisfy the condition of total internal reflection of the first slab optical waveguide, and further causes the light beam to be emitted from the first slab optical waveguide;
the second coupling-out member causes the light beam coupled into the second slab optical waveguide by the second coupling-in member not to satisfy the condition of total internal reflection of the second slab optical waveguide, and further causes the light beam to be emitted from the second slab optical waveguide.
Alternatively, the first coupling-in part, the second coupling-in part, the first coupling-out part and the second coupling-out part may be all of a grating structure, which changes the propagation direction of the light beam through diffraction or reflection and diffraction.
The image light emitted by the first light source is collimated by the corresponding coupling-in optical system and then emitted to the first coupling-in part of the first flat-plate optical waveguide, the first coupling-in part couples the image light emitted by the first light source into the first flat-plate optical waveguide for propagation, and finally the image light is coupled out of the first flat-plate optical waveguide through the first coupling-out part; the image light emitted by the second light source is collimated by the corresponding coupling optical system and then emitted to the second coupling-in part of the second flat-plate optical waveguide, the second coupling-in part couples the image light emitted by the second light source into the second flat-plate optical waveguide for transmission, and finally the image light is coupled out of the second flat-plate optical waveguide through the second coupling-out part.
The first light source and the second light source may be disposed on the same side of the two stacked slab optical waveguides, or may be disposed on two sides of the two stacked slab optical waveguides, which is not limited in this respect. The first slab optical waveguide and the second slab optical waveguide may be either a near-eye-side slab optical waveguide or a far-eye-side slab optical waveguide, and the stacking order thereof has no influence on the implementation of the present invention.
In order to facilitate splicing of first field image light with a first polarization state and second field image light with the first polarization state into a first polarization state light full field image, splicing of the first field image light with the second polarization state and the second field image light with the second polarization state into a second polarization state light full field image, the first coupling-out component is configured to emit the light beam coupled into the first slab optical waveguide by the first coupling-in component to the first field direction, and the second coupling-out component is configured to emit the light beam coupled into the second slab optical waveguide by the second coupling-in component to the second field direction. Further, in order to reduce the splicing overlapping portion as much as possible to obtain a large field angle, an incident angle at which edge image light close to the splicing portion in the first field image light is incident on the first incoupling part is 80 ° to 100 °; the incident angle at which the edge image light near the splice of the second field-of-view image light is incident on the second incoupling member is 80 ° to 100 °.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the polarization dependent lens device is configured to have a positive focal length with respect to the first polarized state light full field of view image and an infinite or substantially infinite focal length with respect to the second polarized state light full field of view image such that the first polarized state light full field of view image is focused at a first depth to display the depth image information and the second polarized state light full field of view image is focused at infinity through the polarization dependent lens device to display the second depth image information; the ambient light polarizer is used for converting the ambient light into second polarized light, so that the ambient light is not influenced by the PDLD. Thereby realizing large-view field splicing and image display with depth information at the same time.
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 embodiments or the description in 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 the drawings without inventive labor:
fig. 1 is a schematic diagram of a near-eye display module in the field of augmented reality in the prior art;
FIG. 2 is a graph illustrating the distribution of the diffraction efficiency of the in-coupling grating of the near-eye display module of FIG. 1;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a diagram of an optical path of the edge image light of the first field of view image light emitted from the first light source away from the splice when the polarization dependent lens device is not disposed;
FIG. 5 is a diagram of an optical path of the edge image light of the first field of view image light emitted from the first light source away from the splice after the polarization dependent lens device is disposed;
FIG. 6 is an optical path diagram of the edge image light of the first field image light near the splice part emitted by the first light source;
FIG. 7 is a schematic optical path diagram of full field of view image light transmission of a first field of view from a first light source;
FIG. 8 is a light path diagram of the edge image light of the second field of view image light emitted by the second light source away from the splice;
FIG. 9 is a diagram of the light path of the second field image light emitted by the second light source approaching the edge image light of the splice;
fig. 10 is a schematic optical path diagram of full field of view image light transmission of the first field of view from the second light source.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a large-field-of-view double-layer depth AR waveguide, as shown in FIG. 3, which comprises a first light source 11, a second light source 12, an incoupling optical system 2 and two planar optical waveguides, wherein the incoupling optical system 2 and the two planar optical waveguides are arranged in one-to-one correspondence with the light sources,
the first light source 11 emits first field image light with a first polarization state and to be imaged at a first depth, and emits first field image light with a second polarization state and to be imaged at a second depth;
the second light source 12 emits the second field image light whose polarization state is the first polarization state and which is to be presented at the first depth, and simultaneously emits the second field image light whose polarization state is the second polarization state and which is to be presented at the second depth;
the two slab optical waveguides include a first slab optical waveguide 31 and a second slab optical waveguide 32 arranged in a stack,
the first slab optical waveguide 31 is provided with a first coupling-in part 311 which is matched with the first light source 11 and couples the light beam emitted by the first light source 11 into the first slab optical waveguide 31, and a first coupling-out part 312 which totally couples the light beam coupled by the first coupling-in part 311 and propagated inside the first slab optical waveguide 31 out towards the human eye;
the second plate optical waveguide 32 is provided with a second coupling-in part 321 which is matched with the second light source 12 and couples the light beam emitted by the second light source 12 into the second plate optical waveguide 32, and a second coupling-out part 322 which totally couples the light beam coupled by the second coupling-in part 321 and propagated inside the second plate optical waveguide 32 out towards the human eye;
the incoupling optical system 2 is configured to collimate and inject the light beams emitted by the respective light sources into the corresponding incoupling sections,
the first field image light with the polarization state of the first polarization state and the second field image light with the polarization state of the first polarization state are coupled out of the corresponding slab optical waveguides through the first out-coupling component 312 and the second out-coupling component 322 respectively and spliced into a first polarization state light full field image,
the first field image light with the polarization state of the second polarization state and the second field image light with the polarization state of the second polarization state are coupled out of the corresponding slab optical waveguides through the first out-coupling component 312 and the second out-coupling component 322 respectively and spliced into a second polarization state light full field image,
the plate optical waveguide closer to human eyes in the first plate optical waveguide 31 and the second plate optical waveguide 32 is a near-eye side plate optical waveguide, the other plate optical waveguide is a far-eye side plate optical waveguide, the surface of the near-eye side plate optical waveguide close to human eyes is provided with a polarization-dependent lens device 4 (a second polarization-de second polarization end lens, a PDLD), the surface of the far-eye side plate optical waveguide far away from human eyes is provided with an ambient light polarizer 5,
the polarization dependent lens device 4 is configured to have a positive focal length with respect to the first polarized state light full field of view image and an infinite or substantially infinite focal length with respect to the second polarized state light full field of view image, such that the first polarized state light full field of view image is focused at a first depth to display the depth image information and the second polarized state light full field of view image is focused at infinity through the polarization dependent lens device 4 to display the second depth image information;
the ambient light polarizer 5 is used for converting the ambient light into the second polarized light, so that the ambient light is not influenced by the PDLD.
For example, a house at a first depth and a mountain at infinity, such a two-level depth information display can effectively alleviate the vergence conflict. Therefore, large-field splicing and image display with depth information are realized simultaneously.
In this embodiment, the first polarization state is S, and the second polarization state is P. However, similarly, optionally, the first polarization state is P, and the second polarization state is S, which is not limited to this.
Further, the first incoupling component 311 is used for totally coupling the light beams emitted from the first light source 11 and collimated by the corresponding incoupling optical system 2 into the first slab optical waveguide 31 so that the light beams satisfy the conditions of total internal reflection of the first slab optical waveguide 31;
the second incoupling component 321 is used for totally coupling the light beams emitted by the second light source 12 and collimated by the corresponding incoupling optical system 2 into the second slab optical waveguide 32 so that the light beams satisfy the conditions of total internal reflection of the second slab optical waveguide 32.
The first outcoupling member 312 makes the light beam incoupled into the first slab optical waveguide 31 by the first incoupling member 311 not satisfy the condition of total internal reflection of the first slab optical waveguide 31, and further makes the light beam be emitted from the first slab optical waveguide 31;
the second out-coupling member 322 causes the light beams coupled into the second slab optical waveguide 32 by the second in-coupling member not to satisfy the condition of total internal reflection of the second slab optical waveguide 32, and further causes the light beams to be emitted from the second slab optical waveguide 32.
Alternatively, the first coupling-in part 311, the second coupling-in part 321, the first coupling-out part 312 and the second coupling-out part 322 may be all of a grating structure, which changes the propagation direction of the light beam through diffraction or reflection and diffraction.
The image light emitted from the first light source 11 is collimated by the corresponding incoupling optical system 2 and then emitted to the first incoupling part 311 of the first slab optical waveguide 31, the first incoupling part 311 couples the image light emitted from the first light source 11 into the first slab optical waveguide 31 for transmission, and finally the image light is coupled out of the first slab optical waveguide 31 through the first outcoupling part 312; the image light emitted from the second light source 12 is collimated by the corresponding incoupling optical system 2 and then emitted to the second incoupling part 321 of the second slab optical waveguide 32, and the second incoupling part 321 couples the image light emitted from the second light source 12 into the second slab optical waveguide 32 for transmission, and finally is coupled out of the second slab optical waveguide 32 through the second outcoupling part 322.
The first light source 11 and the second light source 12 may be disposed on the same side of the two stacked slab optical waveguides, or may be disposed on two sides of the two stacked slab optical waveguides, which is not limited in this respect. The first slab optical waveguide 31 and the second slab optical waveguide 32 may be both a near-eye-side slab optical waveguide or a far-eye-side slab optical waveguide, and the stacking order thereof has no influence on the implementation of the present invention.
In order to facilitate splicing of the first field-of-view image light with the first polarization state and the second field-of-view image light with the first polarization state into the first polarized-state full-field-of-view image, splicing the first field-of-view image light with the second polarization state into the second polarized-state full-field-of-view image, the first out-coupling component 312 is configured to direct the light beam coupled into the first slab optical waveguide 31 by the first in-coupling component 311 to the first field-of-view direction, and the second out-coupling component 322 is configured to direct the light beam coupled into the second slab optical waveguide 32 by the second in-coupling component 321 to the second field-of-view direction. Further, in order to reduce the stitching overlapped portion as much as possible to obtain a large field angle, an incident angle at which the edge image light close to the stitching portion among the first field image light is incident to the first incoupling part 311 is 80 ° to 100 °; the incident angle at which the edge image light near the splice of the second field-of-view image light is incident on the second incoupling part 321 is 80 ° to 100 °.
After the position of the human eye relative to the slab waveguide is taken as the position, the first field of view and the second field of view are preferably distributed left and right or right and left, but are not limited thereto, and may be distributed up and down or up and down.
As shown in fig. 4, for an optical path diagram of the first field-of-view image light emitted by the first light source 11 away from the edge image light of the spliced portion, when the polarization-dependent lens device 4 is not arranged, the first out-coupling component 312 emits the second polarized light and the first polarized light of the first field-of-view image light in the same direction; after the polarization dependent lens device 4 is disposed, as shown in fig. 5, the polarization dependent lens device 4 changes the exit direction of the first polarized light without changing the exit direction of the second polarized light, so that the first polarized light full-field image is focused at the first depth to display the depth image information, and the second polarized light full-field image is focused at infinity through the polarization dependent lens device 4 to display the second depth image information.
Similarly, the optical path diagram of the edge image light close to the splice of the first field image light emitted from the first light source 11 is shown in fig. 6, and as described above, it is preferable that the edge image light close to the splice of the first field image light is incident on the first incoupling part 311 at an incident angle of 80 ° to 100 °. Further, as shown in fig. 7, it is a schematic diagram of the optical path of the full-field image light transmission of the first field of view emitted from the first light source 11.
Similarly, as shown in fig. 8, it is a light path diagram of the edge image light far away from the splicing part of the second field image light emitted from the second light source 12, and fig. 9 is a light path diagram of the edge image light near the splicing part of the second field image light emitted from the second light source 12, and likewise, as described above, it is preferable that the incident angle of the edge image light near the splicing part of the second field image light incident on the second incoupling part 321 is 80 ° to 100 °. Fig. 10 is a schematic diagram of the optical path of the full-field image light transmission of the first field of view emitted by the second light source 12.
Fig. 7 and fig. 10 are combined, that is, a schematic diagram of an optical path for transmitting two full-field image lights of two light sources, so that a first field image light with a first polarization state and a second field image light with the first polarization state are spliced at a first depth to form a first polarized light full-field image, and a first field image light with a second polarization state and a second field image light with the second polarization state are spliced at infinity to form a second polarized light full-field image.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" or "comprises" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The usage of the words first, second, third, etcetera do not indicate any ordering and these words may be interpreted as names.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the polarization dependent lens device is configured to have a positive focal length with respect to the first polarized state light full field of view image and an infinite or substantially infinite focal length with respect to the second polarized state light full field of view image such that the first polarized state light full field of view image is focused at a first depth to display the depth image information and the second polarized state light full field of view image is focused at infinity through the polarization dependent lens device to display the second depth image information; the ambient light polarizer is used for converting the ambient light into second polarized light, so that the ambient light is not influenced by the PDLD. Therefore, large-field splicing and image display with depth information are realized simultaneously.
All features disclosed in this specification, except features that are mutually exclusive, may be combined in any way.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (32)
1. A large-field-of-view double-layer depth AR waveguide is characterized by comprising a first light source, a second light source, an incoupling optical system and two flat optical waveguides, wherein the incoupling optical system and the two flat optical waveguides are arranged in one-to-one correspondence to the light sources,
the first light source emits first field image light with the polarization state being a first polarization state and to be imaged at a first depth, and simultaneously emits first field image light with the polarization state being a second polarization state and to be imaged at a second depth;
the second light source emits second field image light with the polarization state being the first polarization state and to be presented at the first depth, and simultaneously emits second field image light with the polarization state being the second polarization state and to be presented at the second depth;
the two flat optical waveguides comprise a first flat optical waveguide and a second flat optical waveguide which are arranged in a stacked manner, a first coupling-in part and a first coupling-out part which are matched with a first light source are arranged on the first flat optical waveguide, and a second coupling-in part and a second coupling-out part which are matched with a second light source are arranged on the second flat optical waveguide;
the incoupling optical systems are configured to collimate and inject light beams emitted from the respective light sources into the corresponding incoupling parts,
the first field image light with the polarization state of the first polarization state and the second field image light with the polarization state of the first polarization state are respectively coupled out of the corresponding flat optical waveguides through the first coupling-out component and the second coupling-out component and spliced into a first polarization state light full-field image,
the first field image light with the polarization state of the second polarization state and the second field image light with the polarization state of the second polarization state are respectively coupled out of the corresponding flat optical waveguides through the first coupling-out component and the second coupling-out component and spliced into a second polarization state light full-field image,
the method includes the steps that a plate optical waveguide closer to a human eye in a first plate optical waveguide and a second plate optical waveguide is used as a near-eye side plate optical waveguide, the other plate optical waveguide is a far-eye side plate optical waveguide, a polarization-dependent lens device is arranged on the surface, close to the human eye, of the near-eye side plate optical waveguide, an ambient light polarizer is arranged on the surface, far away from the human eye side, of the far-eye side plate optical waveguide, the polarization-dependent lens device is configured to have a positive focal length relative to a first polarized light full-field image and have an infinite or substantially infinite focal length relative to a second polarized light full-field image, and the ambient light polarizer is used for completely converting ambient light into second polarized light.
2. The large-field-of-view, double-layer depth AR waveguide of claim 1, wherein said first polarization state is S and said second polarization state is P; or the first polarization state is P, and the second polarization state is S.
3. The large-field-of-view double-layer-depth AR waveguide of claim 1 or 2, wherein the first incoupling component is configured to entirely couple the light beams emitted from the first light source and collimated by the corresponding incoupling optical system into the first slab optical waveguide such that the light beams satisfy a condition of total internal reflection of the first slab optical waveguide;
the second coupling-in component is used for coupling all the light beams emitted by the second light source and collimated by the corresponding coupling-in optical system into the second flat-plate optical waveguide so that the light beams meet the internal total reflection condition of the second flat-plate optical waveguide.
4. The large-field-of-view double-layer-depth AR waveguide of claim 1 or 2, wherein the first coupling-out member is configured to couple out all light beams coupled in by the first coupling-in member and propagating inside the first slab optical waveguide toward the human eye, and the second coupling-out member is configured to couple out all light beams coupled in by the second coupling-in member and propagating inside the second slab optical waveguide toward the human eye.
5. The large-field-of-view double-layer-depth AR waveguide of claim 3, wherein the first out-coupling means is for totally out-coupling the light beams coupled in by the first in-coupling means and propagating inside the first slab optical waveguide toward the human eye, and the second out-coupling means is for totally out-coupling the light beams coupled in by the second in-coupling means and propagating inside the second slab optical waveguide toward the human eye.
6. The large-field-of-view double-layer-depth AR waveguide of claim 4, wherein the first coupling-out member causes the light coupled into the first slab optical waveguide by the first coupling-in member not to satisfy a condition of total internal reflection of the first slab optical waveguide, thereby causing the light to exit from the first slab optical waveguide;
the second coupling-out member causes the light beam coupled into the second slab optical waveguide by the second coupling-in member not to satisfy the condition of total internal reflection of the second slab optical waveguide, and further causes the light beam to be emitted from the second slab optical waveguide.
7. The large-field-of-view double-layer-depth AR waveguide of claim 5, wherein the first coupling-out member causes the light coupled into the first slab optical waveguide by the first coupling-in member not to satisfy a condition of total internal reflection of the first slab optical waveguide, thereby causing the light to exit from the first slab optical waveguide;
the second coupling-out member causes the light beam coupled into the second slab optical waveguide by the second coupling-in member not to satisfy the condition of total internal reflection of the second slab optical waveguide, and further causes the light beam to be emitted from the second slab optical waveguide.
8. The large-field-of-view double-layer depth AR waveguide of any of claims 1, 2, and 5-7, wherein said first coupling-in section, said second coupling-in section, said first coupling-out section, and said second coupling-out section are all grating structures.
9. The large-field-of-view double-layer-depth AR waveguide of claim 3, wherein said first incoupling component, said second incoupling component, said first outcoupling component, and said second outcoupling component are all grating structures.
10. The large-field-of-view double-layer-depth AR waveguide of claim 4, wherein said first incoupling component, said second incoupling component, said first outcoupling component, and said second outcoupling component are all grating structures.
11. The large-field-of-view double-layer depth AR waveguide of any one of claims 1, 2, 5-7, 9 and 10, wherein the first out-coupling member is configured to direct the light coupled into the first slab optical waveguide by the first in-coupling member in the first field-of-view direction, and the second out-coupling member is configured to direct the light coupled into the second slab optical waveguide by the second in-coupling member in the second field-of-view direction.
12. The large-field-of-view double-layer depth AR waveguide of claim 3, wherein said first out-coupling means is configured to direct light coupled into said first slab optical waveguide by said first in-coupling means in a first field-of-view direction, and said second out-coupling means is configured to direct light coupled into said second slab optical waveguide by said second in-coupling means in a second field-of-view direction.
13. The large-field-of-view double-layer depth AR waveguide of claim 4, wherein said first out-coupling means is configured to direct light coupled into said first slab optical waveguide by said first in-coupling means in a first field-of-view direction, and said second out-coupling means is configured to direct light coupled into said second slab optical waveguide by said second in-coupling means in a second field-of-view direction.
14. The large-field-of-view double-layer-depth AR waveguide of claim 8, wherein the first out-coupling member is configured to direct the light coupled into the first slab optical waveguide by the first in-coupling member in the first field-of-view direction, and the second out-coupling member is configured to direct the light coupled into the second slab optical waveguide by the second in-coupling member in the second field-of-view direction.
15. A large-field-of-view, double-layer depth AR waveguide according to any one of claims 1, 2, 5-7, 9, 10 and 12-14, wherein the incidence angle of the edge image light near the splice in the first-field-of-view image light incident on the first incoupling component is 80 ° to 100 °.
16. The large-field-of-view double-layer-depth AR waveguide of claim 3, wherein the edge image light of the first field-of-view image light near the splice is incident on the first incoupling component at an angle of 80 ° to 100 ° 2.
17. The large-field-of-view double-layer depth AR waveguide of claim 4, wherein an incident angle of the edge image light near the splice in the first field-of-view image light incident on the first incoupling component is 80 ° to 100 °.
18. The large-field-of-view double-layer depth AR waveguide of claim 8, wherein an incident angle of the edge image light near the splice in the first field-of-view image light incident on the first incoupling component is 80 ° to 100 °.
19. The large-field-of-view double-layer depth AR waveguide of claim 11, wherein an incident angle at which the edge image light near the splice of the first-field-of-view image light is incident on the first incoupling component is 80 ° to 100 °.
20. The large-field-of-view double-layer depth AR waveguide according to any one of claims 1, 2, 5 to 7, 9, 10, 12 to 14 and 16 to 19, wherein an incident angle of the edge image light near the splice in the second-field-of-view image light incident on the second incoupling part is 80 ° to 100 °.
21. The large-field-of-view double-layer depth AR waveguide of claim 3, wherein the edge image light of the second field-of-view image light near the splice is incident on the second incoupling component at an angle of 80 ° to 100 °.
22. The large-field-of-view double-layer depth AR waveguide of claim 4, wherein the edge image light of the second field-of-view image light near the splice is incident on the second incoupling component at an angle of 80 ° to 100 °.
23. The large-field-of-view double-layer-depth AR waveguide of claim 8, wherein the edge image light of the second field-of-view image light near the splice is incident on the second incoupling component at an angle of 80 ° to 100 °.
24. The large-field-of-view double-layer depth AR waveguide of claim 11, wherein an incident angle at which the edge image light near the splice of the second-field-of-view image light is incident on the second incoupling component is 80 ° to 100 °.
25. The large-field-of-view double-layer depth AR waveguide of claim 15, wherein an incident angle at which the edge image light near the splice of the second field-of-view image light is incident on the second incoupling component is 80 ° to 100 °.
26. The large-field-of-view, two-layer depth AR waveguide of any of claims 1, 2, 5-7, 9, 10, 12-14, 16-19, and 21-25, wherein the polarization dependent lens device causes the first polarized state light full field-of-view image to be focused at a first depth to display the first depth image information, and the second polarized state light full field-of-view image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
27. The large-field-of-view, double-layer depth AR waveguide of claim 3, wherein the polarization dependent lens device causes the first polarized optical full-field image to be focused at a first depth to display the first depth image information, and the second polarized optical full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
28. The large-field-of-view, double-layer depth AR waveguide of claim 4, wherein the polarization dependent lens device causes the first polarized light full-field image to be focused at a first depth to display the first depth image information, and the second polarized light full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
29. The large-field-of-view, double-layer depth AR waveguide of claim 8, wherein the polarization dependent lens device causes the first polarized light full-field image to be focused at a first depth to display the first depth image information, and the second polarized light full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
30. The large-field-of-view, double-layer depth AR waveguide of claim 11, wherein the polarization dependent lens device causes the first polarized light full-field image to be focused at a first depth to display the first depth image information, and the second polarized light full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
31. The large-field-of-view, double-layer depth AR waveguide of claim 15, wherein the polarization dependent lens device causes the first polarized light full-field image to be focused at a first depth to display the first depth image information, and the second polarized light full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
32. The large-field-of-view, double-layer depth AR waveguide of claim 20, wherein the polarization dependent lens device causes the first polarized light full-field image to be focused at a first depth to display the first depth image information, and the second polarized light full-field image to be focused at infinity through the polarization dependent lens device to display the second depth image information.
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