CN113534328A - Augmented reality diffraction optical waveguide and augmented reality display device - Google Patents
Augmented reality diffraction optical waveguide and augmented reality display device Download PDFInfo
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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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
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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
- G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
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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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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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
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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
- G02B2027/0174—Head mounted characterised by optical features holographic
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Abstract
The application provides an augmented reality diffraction optical waveguide and an augmented reality display device, which relate to the technical field of augmented reality, an incoupling grating region and a functional grating region which are used for coupling light beams into a waveguide substrate are arranged on the waveguide substrate, the functional grating region comprises a first grating region used for forming a first field of view and a second grating region used for forming a second field of view, and the first grating region and the second grating region have an overlapping region and a non-overlapping region, so that the supportable field angle of the augmented reality diffraction optical waveguide can be effectively expanded in a splicing mode of the first field of view and the second field of view, and simultaneously, as the first grating region and the second grating region are respectively spliced of the two fields of view, the overlapping region can simultaneously serve as a relay and an outcoupling grating of the first field of view and the second field of view, thus, each grating region of the augmented reality diffraction optical waveguide can be more compact, the refractive index of the substrate is effectively reduced when a large field angle is supported.
Description
Technical Field
The present application relates to the field of augmented reality technology, and in particular, to an augmented reality diffractive light waveguide and an augmented reality display device.
Background
The augmented reality display technology is a novel display technology which superimposes virtual information on the real world for human eyes to observe and has interactivity. The transmission of the virtual information is accomplished by a projection optical machine, and currently, mainstream projection schemes include Laser Beam Scanning (LBS), free-form surface projection, Bird Bath, geometric array waveguide, diffraction light waveguide, and the like. Since the augmented reality display is a head-worn display, it is sensitive to the quality and size of the projector engine. Therefore, a waveguide scheme having a light and thin display form, particularly a diffraction waveguide scheme, is highly favored by various high-tech huge technologies, and is considered as a mainstream scheme for realizing augmented reality display.
The field angle of the existing diffraction optical waveguide is relatively small, usually only about 50 degrees, and the requirement of a user on immersion feeling cannot be met, so that the field angle of the diffraction optical waveguide is greatly required to be improved by a design scheme of the diffraction optical waveguide with a large field angle.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present application is to provide an augmented reality diffractive optical waveguide and an augmented reality display device to improve the field angle of the diffractive optical waveguide.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
in one aspect of the embodiments of the present application, there is provided an augmented reality diffractive light waveguide, including a waveguide substrate on which an incoupling grating region and a functional grating region for coupling light beams into the waveguide substrate are disposed, the functional grating region including a first grating region for forming a first field of view and a second grating region for forming a second field of view, the first and second grating regions having an overlapping region and a non-overlapping region, the non-overlapping region of the first grating region including a first relay region and a first outcoupling region, the non-overlapping region of the second grating region including a second relay region and a second outcoupling region, the first and second relay regions being configured to turn light beams guided through the incoupling grating region, the overlapping region being configured to turn and exit light beams guided through the first and second relay regions, the first and second outcoupling regions are used for outputting the light beams guided through the overlapping region.
Optionally, the grating periods of the first relay area, the second relay area, the first coupling-out area, the second coupling-out area, and the overlapping area are all the same.
Optionally, the grating vectors of the first relay area and the second relay area are mirror-symmetric with respect to the grating vector of the coupling-in grating area, the grating vectors of the first coupling-out area and the second coupling-out area are mirror-symmetric with respect to the grating vector of the coupling-in grating area, and the grating vectors of the first relay area and the first coupling-out area are mirror-symmetric with respect to the grating vector of the coupling-in grating area; the sum of the clock angles of the first relay area and the second relay area is an integer multiple of 180 degrees, the sum of the clock angles of the first coupling-out area and the second coupling-out area is an integer multiple of 180 degrees, and the sum of the clock angles of the first relay area and the first coupling-out area is an integer multiple of 180 degrees.
Optionally, the distance between the incoupling grating region and the functional grating region is 2-25 mm.
Optionally, the functional grating region is a one-dimensional grating region.
Optionally, the incoupling grating region and the functional grating region form a grating region, a dimension of the grating region along an arrangement direction of the incoupling grating region and the functional grating region is less than 70mm, and a dimension of the grating region perpendicular to the arrangement direction is less than 40 mm.
Optionally, the first coupling-out region and the second coupling-out region are equal in shape and size.
Optionally, the grating structure coupled into the grating region and the functional grating region is a holographic grating structure.
Optionally, the grating structure coupled into the grating region and the functional grating region is a surface relief grating structure.
In another aspect of the embodiments of the present application, there is provided an augmented reality display device including a microdisplay and an augmented reality diffractive light waveguide of any one of the above, the microdisplay corresponding to a position of an incoupling grating region of the augmented reality diffractive light waveguide.
The beneficial effect of this application includes:
the application provides an augmented reality diffraction light waveguide and an augmented reality display device, which comprises a waveguide substrate, wherein a coupling-in grating region and a functional grating region for coupling light beams into the waveguide substrate are arranged on the waveguide substrate, the functional grating region comprises a first grating region for forming a first field of view and a second grating region for forming a second field of view, the first grating region and the second grating region have an overlapping region and a non-overlapping region, the non-overlapping region of the first grating region comprises a first relay region and a first coupling-out region, the non-overlapping region of the second grating region comprises a second relay region and a second coupling-out region, the first relay region and the second relay region are used for turning the light beams conducted through the coupling-in grating region, the overlapping region is used for turning and outputting the light beams conducted through the first relay region and the second relay region, the first and second outcoupling regions are used for outputting the light beams guided through the overlapping region. In this way, the supported field angle of the augmented reality diffractive optical waveguide can be effectively expanded by splicing the first field of view and the second field of view, and meanwhile, the first grating region and the second grating region are respectively spliced of the two field of view, and the first grating region and the second grating region have an overlapping region, so that the overlapping region can serve as a relay and coupling-out grating of the first field of view (for example, a left field of view) and can serve as a relay and coupling-out grating of the second field of view (for example, a right field of view), and thus, the area of the grating region required by the two-dimensional pupil expansion of the augmented reality diffractive optical waveguide can be effectively reduced, each grating region of the augmented reality diffractive optical waveguide is more compact, and the refractive index of the substrate when the large field of view is supported can be effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an augmented reality diffractive light waveguide according to an embodiment of the present disclosure;
fig. 2 is a second schematic structural diagram of an augmented reality diffractive light waveguide according to an embodiment of the present disclosure;
FIG. 3 is a schematic illustration of the grating vectors and the direction of the grating ruling;
FIG. 4 is a schematic diagram of an optical path of an augmented reality diffractive light waveguide according to an embodiment of the present application;
fig. 5 is a schematic view of an overall field of view of an augmented reality diffractive optical waveguide according to an embodiment of the present application.
Icon: 10-a waveguide substrate; 100-coupling into the grating region; 110 — a first incoupling region; 120-a second incoupling region; 200-functional grating area; 211-a first relay zone; 212-a second relay zone; 220-an overlap region; 231 — first outcoupling region; 232-second outcoupling region; 310-grating lines.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood that when an element such as a layer, region or substrate is referred to as being "on" or "extending" onto "another element, it can be directly on or extend directly onto the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or extending "directly onto" another element, there are no intervening elements present. Also, it will be understood that when an element such as a layer, region or substrate is referred to as being "on" or "extending over" another element, it can be directly on or extend directly over the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or extending "directly over" another element, there are no intervening elements present. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In one aspect of the embodiments of the present application, an augmented reality diffraction optical waveguide is provided, as shown in fig. 1, including a waveguide substrate 10, where the waveguide substrate 10 may be made of an optical material with high visible light transmittance, such as glass and plastic.
As shown in fig. 1, an incoupling grating region 100 and a functional grating region 200 formed by gratings are disposed on the waveguide substrate 10 (either on the surface of the waveguide substrate 10 or inside the waveguide substrate 10), the incoupling grating region 100 and the functional grating region 200 are located on the same side of the waveguide substrate 10, and the incoupling grating region 100 and the functional grating region 200 are disposed at an interval. In some embodiments, the incoupling grating region 100 and the functional grating region 200 may also be located on opposite sides of the waveguide substrate 10.
The coupling-in grating region 100 can couple the incident light into the waveguide substrate 10 after the incident light is diffracted, and the diffraction angle of the light beam entering the waveguide substrate 10 can be transmitted to the functional grating region 200 in a total reflection manner in the waveguide substrate 10 after the total reflection condition of the waveguide substrate 10 is satisfied.
As shown in fig. 2, the functional grating region 200 includes a first grating region for forming a first field of view and a second grating region for forming a second field of view, where the first field of view and the second field of view may correspond to a left field of view and a right field of view, respectively, where the left field of view is responsible for realizing a left half of the entire field of view and a vertical field of view, and the right field of view is responsible for realizing a right half of the entire field of view and a vertical field of view, so that the functional grating region 200, that is, the field angle of the augmented reality diffractive optical waveguide, is the field angle of the entire field formed by splicing the left field of view and the right field of view, and thus, the supportable field angle of the augmented reality diffractive optical waveguide can be effectively expanded. For example: optical glass (glass, plastic or other materials) with the refractive index of 1.7 is selected, so that the 60-degree field angle can be supported; optical glass (glass, plastic or other materials) with the refractive index of 1.8 is selected, so that the field angle of 70 degrees can be supported; optical glass (glass, plastic or other materials) with the refractive index of 1.9 is selected, so that the 80-degree field angle can be supported; the optical glass (glass, plastic or other materials) with the refractive index of 2.0 is selected, and can support the field angle of up to 90 degrees, as shown in fig. 5, the horizontal field angle of 39.2 degrees and the vertical field angle of 44.1 degrees of the left field of view, and the horizontal field angle of 39.2 degrees and the vertical field angle of 44.1 degrees of the right field of view, so that the horizontal field angle of 78.4 degrees, the vertical field angle of 44.1 degrees and the diagonal field angle of the whole spliced field of view are 90 degrees, which still cannot be achieved when the refractive index of the substrate material of the existing diffraction optical waveguide is 2.5. Of course, in some embodiments, the first and second fields of view may also correspond to upper and lower fields of view, respectively, with the same effect. In some embodiments, the first field of view and the second field of view may be equal or unequal fractions of the overall field of view.
The first and second grating regions may have a non-overlapping region 220 and an overlapping region 220, wherein the non-overlapping region 220 of the first grating region includes a first relay region 211 and a first outcoupling region 231, and the non-overlapping region 220 of the second grating region includes a second relay region 212 and a second outcoupling region 232.
As shown in fig. 1, to realize the splicing of the first field of view and the second field of view, the first relay area 211 and the second relay area 212 may be disposed continuously on the side of the coupling-in grating area 100, and in some embodiments, after the first relay area 211 and the second relay area 212 are spliced, they may or may not have a certain overlapping area.
The overlapping area 220 is located on a side of the first relay area 211 and the second relay area 212 facing away from the incoupling grating area 100, the overlapping area 220 is adjacent to the first relay area 211 and the second relay area 212, a first outcoupling area 231 is disposed on one side of the overlapping area 220, and a second outcoupling area 232 is disposed on the other side of the overlapping area 220.
By overlapping the first grating region and the second grating region, the overlapping region 220 is formed, and the overlapping region 220 can simultaneously turn and emit the light beam, that is, the overlapping region 220 can simultaneously play a role of relaying and emitting the grating, in other words, the overlapping region 220 plays a role of the light beam equivalent to the overlapping role of the existing relay grating and the existing coupling grating. And because the first grating region and the second grating region are respectively the split joint of two fields of view, the overlapping region 220 can serve as a relay and outcoupling grating for the first field of view (for example, the left field of view) and also can serve as a relay and outcoupling grating for the second field of view (for example, the right field of view), so that the area of the grating region required by the large-field-angle two-dimensional pupil expansion can be effectively reduced, each grating region of the augmented reality diffraction optical waveguide is more compact, and the refractive index of the substrate can be effectively reduced when the large field of view is supported.
In some embodiments, as shown in fig. 1, the incoupling grating area 100 may also be divided into successive first and second incoupling areas 110, 120 according to the first and second fields of view.
As shown in fig. 4, a coupling-in grating region 100 and a functional grating region 200 are provided on the surface of the waveguide substrate 10. When the incident light enters the waveguide substrate 10 from the incoupling grating region 100, the incident light is guided by total reflection, wherein the light beam entering the first incoupling region 110 is guided toward the first relay region 211, and when the incident light is guided to the first relay region 211, the light beam is turned at the first relay region 211 and continues to be guided toward the overlapping region 220, and the light beam entering the second incoupling region 120 is guided toward the second relay region 212, and when the incident light is guided to the second relay region 212, the light beam is turned at the second relay region 212 and continues to be guided toward the overlapping region 220. In view of the overlapping area 220 being capable of acting as both relay and outcoupling, after the light beams guided by the first relay area 211 and the second relay area 212 enter the overlapping area 220, respectively, the light beams are bent and exited continuously at the overlapping area 220, the exiting light beams enter the eyes, and the bent light beams are guided to the first outcoupling area 231 and the second outcoupling area 232 at both sides of the overlapping area 220. The light beam entering the first outcoupling region 231 exits into the eye in the first outcoupling region 231, and the light beam entering the second outcoupling region 232 exits into the eye in the second outcoupling region 232. That is, the light beam emitted from the first coupling-out region 231 and the light beam emitted from the overlapping region 220 form a first field of view, the light beam emitted from the second coupling-out region 232 and the light beam emitted from the overlapping region 220 form a second field of view, and the field angle of the augmented reality diffraction optical waveguide is effectively increased by splicing the first field of view and the second field of view.
In some embodiments, the grating periods of the first relay area 211, the second relay area 212, the first coupling-out area 231, the second coupling-out area 232 and the overlapping area 220 are all the same, i.e. the periods of the whole functional grating area 200 are all the same, so that the overlapping of the first grating area and the second grating area can be realized.
As shown in fig. 3, a relationship between a grating vector k and a direction of a grating line 310 is schematically shown, that is, the grating vector k is perpendicular to the direction of the grating line 310, and a direction of each two adjacent grating lines 310 is a grating period.
In some embodiments, the grating vectors of the first relay area 211 and the second relay area 212 are mirror symmetric with respect to the grating vector of the incoupling grating area 100; the grating vectors of the first outcoupling region 231 and the second outcoupling region 232 are symmetric with respect to the grating vector of the incoupling grating region 100; meanwhile, the grating vectors of the first relay area 211 and the first outcoupling area 231 are made mirror-symmetrical with respect to the grating vector of the incoupling grating area 100. The sum of the clock angles of the first relay area 211 and the second relay area 212 is an integer multiple of 180 degrees, the sum of the clock angles of the first coupling-out area 231 and the second coupling-out area 232 is an integer multiple of 180 degrees, and the sum of the clock angles of the first relay area 211 and the first coupling-out area 231 is an integer multiple of 180 degrees. In this way, the functional grating region 200 can be made to form the aforementioned plurality of grating regions that exert different effects on the light beam.
Alternatively, the distance between the incoupling grating area 100 and the functional grating area 200 is 2mm-25mm, as shown in fig. 1, the distance between the incoupling grating area 100 and the continuous area formed by the first relay area 211 and the second relay area 212 is 2mm-25mm, for example, it may be 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, etc. in different embodiments. During actual design, the method can be reasonably selected according to design requirements. Therefore, the grating structure with a compact structure is facilitated to be realized.
In some embodiments, as shown in fig. 1, the incoupling grating region 100 and the functional grating region 200 form a grating region, the dimension of the grating region along the arrangement direction of the incoupling grating region 100 and the functional grating region 200 is less than 70mm, and the dimension of the grating region perpendicular to the arrangement direction is less than 40 mm. Compared with the size of the existing grating, the size of the grating can be effectively reduced.
Alternatively, the gratings of the first relay area 211 and the second relay area 212 may be areas implementing one-dimensional gratings, for example implementing an extension in the X direction. The first outcoupling region 231 and the second outcoupling region 232 may also be regions implementing a one-dimensional grating, for example implementing an expansion in the Y-direction. The overlapping region 220 may be a region implementing a one-dimensional grating, and since it is a multiplexing region, expansion in the direction of X, Y can be simultaneously implemented, so that after the light beam coupled into the grating region 100 is guided to the functional grating region 200, a two-dimensional pupil expansion can be implemented, and the compatibility of the augmented reality diffractive light waveguide for different users is effectively enhanced.
Optionally, the first coupling-out region 231 and the second coupling-out region 232 are equal in shape and size, so that the areas of the first and second fields of view are the same, and the display effect is more symmetrical.
Alternatively, the grating structures coupled into the grating region 100 and the functional grating region 200 are a holographic grating structure.
Alternatively, the grating structures coupled into the grating region 100 and the functional grating region 200 are surface relief grating structures.
In another aspect of the embodiments of the present application, an augmented reality display device is provided, as shown in fig. 4, including a microdisplay and an augmented reality diffractive light waveguide of any one of the above, where the microdisplay corresponds to a position of an incoupling grating region 100 of the augmented reality diffractive light waveguide, so that after light exits from the microdisplay, the light enters the waveguide substrate 10 from the incoupling grating region 100, and finally exits from a functional grating region 200 an overall field of view formed by splicing a first field of view and a second field of view, thereby effectively expanding a field of view of the augmented reality display device and reducing a volume of the augmented reality display device.
The microdisplay can be a light projector, and the projection can be in a top-down, side-projection, or other oblique projection. In the augmented reality display device, the device can be an R/G/B monochromatic waveguide sheet, namely a projection light machine is matched with a waveguide sheet which only transmits one type of R, G or B color light; the full-color RGB combined waveguide sheet may be configured such that the R waveguide sheet transmits R color light, the G waveguide sheet transmits G color light, and the B waveguide sheet transmits B color light.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An augmented reality diffractive optical waveguide comprising a waveguide substrate (10), an incoupling grating region (100) and a functional grating region (200) disposed on the waveguide substrate (10) for coupling a light beam into the waveguide substrate (10), the functional grating region (200) comprising a first grating region for forming a first field of view and a second grating region for forming a second field of view, the first and second grating regions having an overlapping region (220) and a non-overlapping region (220), the non-overlapping region (220) of the first grating region comprising a first relay region (211) and a first outcoupling region (231), the non-overlapping region (220) of the second grating region comprising a second relay region (212) and a second outcoupling region (232), the first relay region (211) and the second relay region (212) being for converting a light beam guided through the incoupling grating region (100) And an overlapping region (220) for turning and exiting the light beams propagated through the first relay region (211) and the second relay region (212), and a first outcoupling region (231) and a second outcoupling region (232) for exiting the light beams propagated through the overlapping region (220).
2. The augmented reality diffractive light waveguide according to claim 1, wherein the grating periods of the first relay region (211), the second relay region (212), the first outcoupling region (231), the second outcoupling region (232) and the overlap region (220) are all the same.
3. The augmented reality diffractive light waveguide according to claim 1, wherein grating vectors of the first relay region (211) and the second relay region (212) are mirror symmetric with respect to a grating vector of the incoupling grating region (100), grating vectors of the first outcoupling region (231) and the second outcoupling region (232) are mirror symmetric with respect to a grating vector of the incoupling grating region (100), and grating vectors of the first relay region (211) and the first outcoupling region (231) are mirror symmetric with respect to a grating vector of the incoupling grating region (100); the sum of the clock angles of the first relay area (211) and the second relay area (212) is an integer multiple of 180 degrees, the sum of the clock angles of the first coupling-out area (231) and the second coupling-out area (232) is an integer multiple of 180 degrees, and the sum of the clock angles of the first relay area (211) and the first coupling-out area (231) is an integer multiple of 180 degrees.
4. The augmented reality diffractive light waveguide according to claim 1, wherein the distance between the incoupling grating region (100) and the functional grating region (200) is 2mm-25 mm.
5. The augmented reality diffractive optical waveguide according to any of the claims 1 to 4, characterized in that the functional grating region (200) is a one-dimensional grating region.
6. The augmented reality diffractive light waveguide according to claim 1, wherein the incoupling grating region (100) and the functional grating region (200) form a grating region having a dimension along an arrangement direction of the incoupling grating region (100) and the functional grating region (200) of less than 70mm and a dimension perpendicular to the arrangement direction of less than 40 mm.
7. The augmented reality diffractive light waveguide according to claim 1 wherein the first outcoupling region (231) and the second outcoupling region (232) are equal in shape and size.
8. The augmented reality diffractive light waveguide according to claim 1, wherein the grating structures of the incoupling grating region (100) and the functional grating region (200) are holographic volume grating structures.
9. The augmented reality diffractive light waveguide according to claim 1, wherein the grating structures of the incoupling grating region (100) and the functional grating region (200) are surface relief grating structures.
10. An augmented reality display device comprising a microdisplay and an augmented reality diffractive light waveguide according to any one of claims 1 to 9, the microdisplay corresponding to the position of an in-coupling grating region (100) of the augmented reality diffractive light waveguide.
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| CN202111025380.0A CN113534328A (en) | 2021-09-02 | 2021-09-02 | Augmented reality diffraction optical waveguide and augmented reality display device |
| PCT/CN2021/142505 WO2023029319A1 (en) | 2021-09-02 | 2021-12-29 | Augmented reality diffractive optical waveguide and augmented reality display apparatus |
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| CN202111025380.0A CN113534328A (en) | 2021-09-02 | 2021-09-02 | Augmented reality diffraction optical waveguide and augmented reality display device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371528A (en) * | 2022-01-13 | 2022-04-19 | 北京理工大学 | Diffractive optical waveguide and display method based on the same |
| WO2023029319A1 (en) * | 2021-09-02 | 2023-03-09 | 浙江水晶光电科技股份有限公司 | Augmented reality diffractive optical waveguide and augmented reality display apparatus |
| WO2023123920A1 (en) * | 2021-12-27 | 2023-07-06 | 歌尔光学科技有限公司 | Optical transmission structure and head-mounted display device |
| WO2023215339A1 (en) * | 2022-05-06 | 2023-11-09 | Google Llc | Waveguide input coupler multiplexing to reduce exit pupil expansion ray footprint |
| CN117687204A (en) * | 2024-01-29 | 2024-03-12 | 南京平行视界技术有限公司 | Two-dimensional pupil expanding device based on holographic waveguide and pupil expanding method thereof |
| WO2024060796A1 (en) * | 2022-09-19 | 2024-03-28 | 歌尔光学科技有限公司 | Optical waveguide device and head-mounted display apparatus |
| CN117930423A (en) * | 2024-03-21 | 2024-04-26 | 歌尔光学科技有限公司 | Light guide device, light guide assembly and display device |
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| US9791703B1 (en) * | 2016-04-13 | 2017-10-17 | Microsoft Technology Licensing, Llc | Waveguides with extended field of view |
| US9939647B2 (en) * | 2016-06-20 | 2018-04-10 | Microsoft Technology Licensing, Llc | Extended field of view in near-eye display using optically stitched imaging |
| CN108803023A (en) * | 2018-02-13 | 2018-11-13 | 成都理想境界科技有限公司 | The nearly eye display module of simple eye big visual field, display methods and head-mounted display apparatus |
| GB2577327A (en) * | 2018-09-24 | 2020-03-25 | Wave Optics Ltd | Device for augmented reality or virtual reality display |
| US20200117005A1 (en) * | 2018-10-15 | 2020-04-16 | Facebook Technologies, Llc | Waveguide for conveying multiple portions of field of view |
| WO2020184885A1 (en) * | 2019-03-13 | 2020-09-17 | 주식회사 엘지화학 | Diffractive light guide plate |
| CN113534328A (en) * | 2021-09-02 | 2021-10-22 | 浙江水晶光电科技股份有限公司 | Augmented reality diffraction optical waveguide and augmented reality display device |
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2021
- 2021-09-02 CN CN202111025380.0A patent/CN113534328A/en active Pending
- 2021-12-29 WO PCT/CN2021/142505 patent/WO2023029319A1/en unknown
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023029319A1 (en) * | 2021-09-02 | 2023-03-09 | 浙江水晶光电科技股份有限公司 | Augmented reality diffractive optical waveguide and augmented reality display apparatus |
| WO2023123920A1 (en) * | 2021-12-27 | 2023-07-06 | 歌尔光学科技有限公司 | Optical transmission structure and head-mounted display device |
| CN114371528A (en) * | 2022-01-13 | 2022-04-19 | 北京理工大学 | Diffractive optical waveguide and display method based on the same |
| CN114371528B (en) * | 2022-01-13 | 2023-03-17 | 北京理工大学 | Diffractive optical waveguide and display method based on the same |
| WO2023215339A1 (en) * | 2022-05-06 | 2023-11-09 | Google Llc | Waveguide input coupler multiplexing to reduce exit pupil expansion ray footprint |
| WO2024060796A1 (en) * | 2022-09-19 | 2024-03-28 | 歌尔光学科技有限公司 | Optical waveguide device and head-mounted display apparatus |
| CN117687204A (en) * | 2024-01-29 | 2024-03-12 | 南京平行视界技术有限公司 | Two-dimensional pupil expanding device based on holographic waveguide and pupil expanding method thereof |
| CN117930423A (en) * | 2024-03-21 | 2024-04-26 | 歌尔光学科技有限公司 | Light guide device, light guide assembly and display device |
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