CN111679361A - Optical waveguide, near-to-eye display system and design method of optical waveguide coupling-out area - Google Patents
Optical waveguide, near-to-eye display system and design method of optical waveguide coupling-out area 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
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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
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- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1842—Gratings for image generation
Abstract
The embodiment of the invention relates to the technical field of optical design, and discloses an optical waveguide, a near-eye display system and a design method of an optical waveguide coupling-out area, wherein the optical waveguide comprises the following components: an in-coupling region for in-coupling the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein the out-coupling region comprises: the optical waveguide comprises a plurality of partitions which are arranged in a pixelization mode, wherein each partition comprises a partition with a grating structure and a partition without the grating structure, the partition without the grating structure is used for transmitting the light beams in a total reflection mode, the partition with the grating structure is used for coupling out part of the light beams and expanding and transmitting part of the light beams, and the number of the partitions without the grating structures is gradually reduced along the direction far away from the coupling-in area.
Description
Technical Field
The embodiment of the invention relates to the technical field of optical design, in particular to an optical waveguide, a near-eye display system and a design method of an optical waveguide coupling-out area.
Background
The augmented reality technology, namely the AR technology, fuses virtual information and the real world mutually, belongs to the detonation point of the next information technology, and the augmented reality glasses are predicted to replace a mobile phone to become a next generation of cooperative computing platform according to authority. Augmented reality technologies represented by augmented reality glasses are beginning to rise in various industries at present, and particularly in the fields of security and industry, the augmented reality technologies embody the inexplicable advantages and the information interaction mode is greatly improved. At present, the mature augmented reality technology mainly comprises a prism scheme, a birdbath scheme, a free-form surface scheme and a waveguide scheme, the first three schemes have large volumes, the application of the three schemes in the aspect of intelligent wearing, namely the aspect of augmented reality glasses is limited, and the waveguide is the best augmented reality glasses scheme at present. The waveguide schemes are further classified into a geometric waveguide scheme, an embossed grating waveguide scheme, and a volume hologram waveguide scheme. The geometric waveguide scheme is to use the coated semi-transparent and semi-reflective mirror of the array to achieve the display of virtual information, but the view field and the eye movement range of the scheme are limited, and the array lens can bring the stripe effect to the picture, so the geometric waveguide scheme can not present the best display effect to human eyes. Volume holographic waveguide solutions are currently limited to large scale mass production. The embossed grating waveguide scheme is the most studied technical scheme at present due to the convenience of nano-imprinting, and has the advantages of large field of view and large eye movement range. The current scheme paths of the embossed grating waveguide mainly include a waveguide scheme based on a one-dimensional grating and a waveguide scheme based on a two-dimensional grating. The two-dimensional grating waveguide is divided into an in-coupling region and an out-coupling region, the out-coupling region has both expansion and out-coupling functions, and the uniformity of the field of view and the uniformity of the exit pupil are a great challenge of the two-dimensional grating waveguide.
In implementing the embodiments of the present invention, the inventors found that at least the following problems exist in the above related art: at present, in order to improve the uniformity of light output from the coupling-out region of the optical waveguide, the conventional method is to partition the coupling-out region, where grating parameters (such as height, duty ratio, diameter, and the like) of different partitions are different and grating periods are the same, so that the coupling-out efficiency of different partitions can be adjusted, thereby achieving the uniformity of the whole coupling-out region. However, the conventional scheme has the disadvantage of different grating parameters in different partitions, which increases the processing difficulty and increases the processing cost.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the embodiments of the present invention is to provide an optical waveguide, a near-eye display system and a method for designing a coupling-out region of an optical waveguide, which have good uniformity and are easy to process.
The purpose of the embodiment of the invention is realized by the following technical scheme:
in order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides an optical waveguide, including: an in-coupling region for in-coupling in the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein,
the coupling-out region includes: the device comprises a plurality of subareas which are arranged in a pixelization mode, wherein each subarea comprises a subarea provided with a grating structure and a subarea not provided with the grating structure, the subarea not provided with the grating structure is used for totally reflecting and transmitting the light beam, the subarea provided with the grating structure is used for coupling out part of the light beam and expanding and transmitting part of the light beam, and the number of the subareas not provided with the grating structure is gradually reduced along the direction far away from the coupling-in area.
In some embodiments, the optical waveguide further comprises a waveguide substrate, the coupling-in region and the coupling-out region being disposed on the waveguide substrate.
In some embodiments, the shape of the partitions is a parallelogram and/or the shape of the partitions conforms to the periodic shape of the grating of the coupling-out region.
In some embodiments, the parameters of the grating structures in each of the regions provided with grating structures are consistent.
In some embodiments, in the coupling-out region, each of the segments is uniform in size, the size of the segment is smaller than an eye pupil diameter, and the eye pupil diameter is 4 mm.
In some embodiments, the structure of the coupling-in region is one of a mirror, a prism, a free-form surface structure, a grating structure, a super-surface structure, a volume holographic structure, or a resonant grating structure.
In some embodiments, the structure of the outcoupling region is one of a two-dimensional grating structure, a super-surface structure, a volume holographic structure, or a resonant grating structure.
In order to solve the above technical problem, in a second aspect, an embodiment of the present invention provides a near-eye display system, including: a micro-projector light engine, and an optical waveguide as described above in relation to the first aspect.
In order to solve the above technical problem, in a third aspect, an embodiment of the present invention provides a method for designing a coupling-out area of an optical waveguide, the method being applied to the coupling-out area of the optical waveguide, the optical waveguide further includes a coupling-in area for coupling in a light beam with image information, and the coupling-out area is used for coupling out the light beam with image information, and the method includes:
dividing the out-coupling region into a plurality of pixelated partitions;
arranging a grating structure on part of the subareas so that the coupling-out efficiency of the coupling-out area is relatively uniform; wherein the content of the first and second substances,
the subareas without the grating structures are used for totally reflecting and propagating the light beams, the subareas with the grating structures are used for coupling out partial light beams and expanding and propagating partial light beams, and the number of the subareas without the grating structures is gradually reduced along the direction far away from the coupling-in area.
In some embodiments, the shape of the partitions is a parallelogram and/or the shape of the partitions conforms to the periodic shape of the grating of the coupling-out region.
In some embodiments, the parameters of the grating structures in each of the regions provided with grating structures are consistent.
In some embodiments, in the coupling-out region, each of the segments is uniform in size, the size of the segment is smaller than an eye pupil diameter, and the eye pupil diameter is 4 mm.
Compared with the prior art, the invention has the beneficial effects that: in contrast to the prior art, embodiments of the present invention provide an optical waveguide, a near-eye display system, and a method for designing a coupling-out region of an optical waveguide, where the optical waveguide includes: an in-coupling region for in-coupling the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein the out-coupling region comprises: the optical waveguide comprises a plurality of partitions which are arranged in a pixelization mode, wherein each partition comprises a partition with a grating structure and a partition without the grating structure, the partition without the grating structure is used for transmitting the light beams in a total reflection mode, the partition with the grating structure is used for coupling out part of the light beams and expanding and transmitting part of the light beams, and the number of the partitions without the grating structures is gradually reduced along the direction far away from the coupling-in area.
Drawings
One or more embodiments are illustrated by the accompanying figures in the drawings that correspond thereto and are not to be construed as limiting the embodiments, wherein elements/modules and steps having the same reference numerals are represented by like elements/modules and steps, unless otherwise specified, and the drawings are not to scale.
Fig. 1 is a schematic structural diagram of an optical waveguide according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another optical waveguide provided in the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a near-eye display system according to a second embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for designing an optical waveguide coupling-out region according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be noted that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the optical waveguide, light is coupled into a waveguide substrate through a coupling-in area grating, so that the light meets the total reflection condition and is transmitted in the substrate in a total reflection way, in a coupling-out area, part of the light is transmitted in an expanding way, and part of the light is coupled out to human eyes, thereby achieving the purpose of near-to-eye display. If the grating structure is uniform throughout the outcoupling region, the light will only propagate less and less weakly in the outcoupling region. Therefore, in order to improve the uniformity of the whole coupling-out area, the conventional method is to partition the coupling-out area, the grating parameters (such as height, duty ratio, diameter, etc.) of different partitions are different, and the grating period is the same, so that the coupling-out efficiency of different partitions can be adjusted, and the uniformity of the whole coupling-out area is achieved. The conventional scheme has the defects that different regions have different grating parameters, so that the processing difficulty is increased, and the processing cost is increased.
In order to solve the above-mentioned problems of large uniformity of light output, high processing difficulty and high cost, an embodiment of the present invention provides an optical waveguide, a near-eye display system, and a method for designing a coupling-out region of an optical waveguide, where a grating structure of the coupling-out region in the optical waveguide is designed by the method for designing the coupling-out region of the optical waveguide, so that the coupling-out efficiency of the coupling-out region is uniform, and the optical waveguide designed by the method includes: an in-coupling region for in-coupling the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein the out-coupling region comprises: the optical waveguide comprises a plurality of subareas which are arranged in a pixelization mode, wherein each subarea comprises a subarea with a grating structure and a subarea without the grating structure, the subareas without the grating structures are used for totally reflecting and transmitting the light beams, the subareas with the grating structures are used for coupling out part of the light beams and expanding and transmitting part of the light beams, and the number of the subareas without the grating structures is gradually reduced along the direction far away from the coupling-in area.
Specifically, the embodiments of the present invention will be further explained below with reference to the drawings.
Example one
An embodiment of the present invention provides an optical waveguide, please refer to fig. 1 and fig. 2, which illustrate structures of two optical waveguides provided by an embodiment of the present invention, where the optical waveguides include: the light guide plate comprises a coupling-in area, a coupling-out area and a waveguide substrate, wherein the coupling-in area and the coupling-out area are arranged on the waveguide substrate, the coupling-in area is used for coupling in light beams with image information, and the coupling-out area is used for coupling out the light beams with the image information.
The structure of the coupling-in area may be one of a mirror, a prism, a free-form surface structure, a grating structure, a super-surface structure, a volume holographic structure, or a resonance grating structure, and specifically, may be selected according to actual needs.
The structure of the coupling-out region may be one of a two-dimensional grating structure, a super-surface structure, a volume holographic structure, or a resonance grating structure, and specifically, may be selected according to actual needs, and does not need to be limited by the embodiments and drawings of the present invention.
The coupling-out region includes: the device comprises a plurality of subareas which are arranged in a pixelization mode, wherein each subarea comprises a subarea provided with a grating structure and a subarea not provided with the grating structure, the subarea not provided with the grating structure is used for totally reflecting and transmitting the light beam, the subarea provided with the grating structure is used for coupling out part of the light beam and expanding and transmitting part of the light beam, and the number of the subareas not provided with the grating structure is gradually reduced along the direction far away from the coupling-in area.
Wherein the shape of the partition is a parallelogram and/or the shape of the partition coincides with the periodic shape of the grating of the coupling-out region, preferably the periodic shape of the grating is a rectangle. For example, in fig. 1, the shape of the partitions is rectangular, and in fig. 2, the shape of the partitions is rhombic. In the coupling-out region, the size of each of the partitions is uniform. Preferably, the size of the subarea is smaller than the diameter of an eye pupil, and the diameter of the eye pupil is 4mm, so that light can enter the human eye without influencing the image viewed by the human eye. Further, the size of the partition may also be less than 2 mm. The dimension refers to the maximum width of the partition.
In fig. 1 and 2, the black partition in the coupling-out region indicates that the partition does not contain the grating structure, the shape of the white region partition indicates that the partition contains the grating structure, and the overall shapes of the partition and the coupling-out region are not limited to the examples of fig. 1 and 2, and may be specifically set according to actual needs.
In the embodiment of the invention, the parameters of the grating structures in the partitions provided with the grating structures are consistent, and the whole coupling-out area adopts the grating structures with the same grating parameters, so that the processing difficulty can be greatly reduced, and the processing cost is reduced. Specifically, in practical applications, the grating period and the grating parameters of the grating structure may be set according to actual needs, and are not limited by the embodiments of the present invention, and the number, size, shape, and the like of the partitions, such as the number of rows and columns of the partitions, are not limited by the embodiments of the present invention, and may be set according to actual needs.
Specifically, when processing the coupling-out region of the optical waveguide according to the embodiment of the present invention, first, a required grating structure period is determined according to parameters such as a wavelength of a required output beam, a refractive index of the optical waveguide, a field of view, and the like, and an appropriate grating structure is selected. Then, the number and the positions of the partitions in which the grating structures need to be engraved are selected from the partitioned partitions of the coupling-out area, wherein the number of the partitions in which the grating structures need to be engraved is selected to be smaller than the rear part of the extension direction in the coupling area near the front part of the extension direction, so as to adjust the intensity of light emission and ensure the uniformity of output laser. And finally, processing the coupling-out area of the optical waveguide according to the number and the position of the selected subareas, wherein the wafer can be processed by adopting diffraction grating processing equipment such as electron beam/ion beam equipment, extreme/deep ultraviolet lithography equipment or interference lithography equipment, and the grating structure of the embodiment of the invention can be printed and reproduced in mass production by using nano-imprinting equipment.
The optical waveguide provided by the embodiment of the invention adjusts the coupling-out efficiency by adjusting whether each subarea in the coupling-out area contains the grating structure or not, so that the uniformity is improved, if the subarea contains the grating structure, the light can be coupled out in the subarea, and if the subarea does not contain the grating structure, the light is transmitted in the subarea in a total reflection manner and cannot be coupled out to human eyes.
Example two
An embodiment of the present invention provides a near-eye display system, please refer to fig. 3, which shows a structure of the near-eye display system provided in the embodiment of the present invention, and the near-eye display system includes: a micro-projector optical machine 1 and an optical waveguide comprising a coupling-in region 2, a waveguide substrate 3 and a coupling-out region 4.
It should be noted that the optical waveguide according to the embodiment of the present invention is the optical waveguide according to the first embodiment, and has the same structure and characteristics, and specific structures, parameters, effects, and the like of the optical waveguide according to the embodiment of the present invention can be referred to in the first embodiment, and are not described in detail herein.
In the embodiment of the present invention, the image source in the micro-projection optical machine 1 may be one of LCOS, DMD, OLED and MEMS, the light emitted from the micro-projection optical machine 1 is coupled into the optical waveguide 3 through the grating structure disposed on the coupling-in area 2, the light coupled into the optical waveguide 3 is propagated in the optical waveguide 3 by total reflection, when the light is propagated to the coupling-out area 4, a part of the light is expanded in pupil through the grating structure disposed on the coupling-out area 4 and coupled out of the optical waveguide 3, and then propagated into the human eye 5 for imaging. Further, the grating structure may also be arranged inside the optical waveguide 3 to enable the light to change the propagation direction in the optical waveguide 3.
The embodiment of the invention provides a near-to-eye display system, which comprises a micro-projection light machine for emitting light rays for imaging and the optical waveguide described in the embodiment A.
EXAMPLE III
An embodiment of the present invention provides a method for designing an optical waveguide coupling-out area, please refer to fig. 4, which shows a flow of the method for designing an optical waveguide coupling-out area according to the embodiment of the present invention, the method is applied to the coupling-out area of an optical waveguide, the optical waveguide further includes a coupling-in area for coupling in a light beam with image information, the coupling-out area is used for coupling out the light beam with image information, the method includes, but is not limited to, the following steps:
step 10: the coupling-out region is divided into a plurality of pixelated partitions.
The shape of the partitions is a parallelogram and/or the shape of the partitions corresponds to the periodic shape of the grating of the coupling-out region. In the coupling-out region, the size of each of the subareas is uniform, the size of the subarea is smaller than an eye pupil diameter, and the eye pupil diameter is 4 mm. Or, further, the size of the partitions may also be smaller than 2 mm.
In particular, in the embodiment of the present invention, the shape and size of the subarea may be designed according to the wavelength, the light intensity and the like of the desired outcoupled light beam, and preferably, in order to ensure that the outcoupled light beam can enter the human eye, the size of the subarea is preferably smaller than the diameter of the eye pupil.
Step 20: a grating structure is arranged on part of the sections to make the outcoupling efficiency of the outcoupling regions relatively uniform.
The subareas without the grating structures are used for total reflection propagation of the light beams, the subareas with the grating structures are used for coupling out partial light beams and expanding propagation partial light beams, and the number of the subareas without the grating structures is gradually reduced along the direction far away from the coupling-in area. And the parameters of the grating structures in the partitions provided with the grating structures are consistent, so that the processing difficulty and the processing cost are reduced.
Specifically, when designing the coupling-out region of the optical waveguide according to the embodiment of the present invention, first, a required grating structure period is determined according to parameters such as a wavelength of a required output light beam, a refractive index of the optical waveguide, a field of view, and the like, and an appropriate grating structure is selected. Then, the number and the position of the areas where the grating structures need to be engraved are selected from the divided areas of the coupling-out area, wherein the number of the areas where the grating structures need to be engraved is selected to be smaller than the rear part of the extension direction near the front part of the extension direction, so as to adjust the intensity of light emission and ensure the uniformity of output laser, and specifically, the light emission effect can be obtained by combining software, for example, the light intensity of the coupling-out area can be calculated by VirtualLab Fusion software, so as to simulate the light field tracking effect under multiple fields of view. And finally, obtaining a final design result of the optical waveguide coupling-out area according to the number and the position of the selected areas.
Further, according to the design result, the coupling-out region of the optical waveguide is processed, wherein the wafer can be processed by using diffraction grating processing equipment such as electron beam/ion beam equipment, extreme/deep ultraviolet lithography equipment, or interference lithography equipment, and the grating structure according to the embodiment of the present invention can be manufactured by using nanoimprint equipment for imprint replication.
It should be noted that, in practical applications, the grating period and the grating parameters of the grating structure may be set according to actual needs, and need not be limited by the embodiments of the present invention, and the number, size, shape, and the like of the regions, such as the number of rows and columns of the regions, and need not be limited by the embodiments of the present invention, and may be set according to actual needs.
The embodiment of the invention provides an optical waveguide, a near-eye display system and a design method of an optical waveguide coupling-out area, wherein the optical waveguide comprises the following components: an in-coupling region for in-coupling the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein the out-coupling region comprises: the optical waveguide comprises a plurality of partitions which are arranged in a pixelization mode, wherein each partition comprises a partition with a grating structure and a partition without the grating structure, the partition without the grating structure is used for transmitting the light beams in a total reflection mode, the partition with the grating structure is used for coupling out part of the light beams and expanding and transmitting part of the light beams, and the number of the partitions without the grating structures is gradually reduced along the direction far away from the coupling-in area.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. An optical waveguide, comprising: an in-coupling region for in-coupling in the light beam with image information and an out-coupling region for out-coupling the light beam with image information, wherein,
the coupling-out region includes: the device comprises a plurality of subareas which are arranged in a pixelization mode, wherein each subarea comprises a subarea provided with a grating structure and a subarea not provided with the grating structure, the subarea not provided with the grating structure is used for totally reflecting and transmitting the light beam, the subarea provided with the grating structure is used for coupling out part of the light beam and expanding and transmitting part of the light beam, and the number of the subareas not provided with the grating structure is gradually reduced along the direction far away from the coupling-in area.
2. The optical waveguide of claim 1,
the optical waveguide further comprises a waveguide substrate, the coupling-in region and the coupling-out region being arranged on the waveguide substrate.
3. The optical waveguide of claim 2,
the shape of the partitions is a parallelogram and/or the shape of the partitions corresponds to the periodic shape of the grating of the coupling-out region.
4. The optical waveguide of claim 3,
and the parameters of the grating structures in the partitions provided with the grating structures are consistent.
5. The optical waveguide of claim 4,
in the coupling-out region, the size of each of the subareas is uniform, the size of the subarea is smaller than an eye pupil diameter, and the eye pupil diameter is 4 mm.
6. The optical waveguide of any of claims 1-5,
the structure of the coupling-in area is one of a reflector, a prism, a free-form surface structure, a grating structure, a super-surface structure, a volume holographic structure or a resonance grating structure.
7. The optical waveguide of any of claims 1-5,
the structure of the coupling-out area is one of a two-dimensional grating structure, a super-surface structure, a volume holographic structure or a resonance grating structure.
8. A near-eye display system, comprising: a micro-projector, and an optical waveguide according to any of the preceding claims 1-7.
9. A method for designing an outcoupling region of an optical waveguide, the method being applied to an outcoupling region of an optical waveguide, the optical waveguide further comprising an outcoupling region for incoupling a light beam with image information, the outcoupling region being for outcoupling the light beam with image information, the method comprising:
dividing the out-coupling region into a plurality of pixelated partitions;
arranging a grating structure on part of the subareas so that the coupling-out efficiency of the coupling-out area is relatively uniform; wherein the content of the first and second substances,
the subareas without the grating structures are used for totally reflecting and propagating the light beams, the subareas with the grating structures are used for coupling out partial light beams and expanding and propagating partial light beams, and the number of the subareas without the grating structures is gradually reduced along the direction far away from the coupling-in area.
10. The design method according to claim 9,
the shape of the partitions is a parallelogram and/or the shape of the partitions corresponds to the periodic shape of the grating of the coupling-out region.
11. The design method according to claim 10,
and the parameters of the grating structures in the partitions provided with the grating structures are consistent.
12. The design method according to claim 11,
in the coupling-out region, the size of each of the subareas is uniform, the size of the subarea is smaller than an eye pupil diameter, and the eye pupil diameter is 4 mm.
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| CN113093384A (en) * | 2021-03-15 | 2021-07-09 | 深圳珑璟光电技术有限公司 | AR glasses |
| RU2752556C1 (en) * | 2020-10-20 | 2021-07-29 | Самсунг Электроникс Ко., Лтд. | Waveguide with segmented diffraction optical elements and near-eye display |
| CN113625446A (en) * | 2021-07-15 | 2021-11-09 | 嘉兴驭光光电科技有限公司 | Method for designing AR optical waveguide and optical waveguide for AR glasses |
| CN113625447A (en) * | 2021-07-15 | 2021-11-09 | 嘉兴驭光光电科技有限公司 | Design method of AR optical waveguide coupling-out grating and design method of AR optical waveguide |
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| WO2023061310A1 (en) * | 2021-10-15 | 2023-04-20 | 嘉兴驭光光电科技有限公司 | Diffractive optical waveguide, display device, and design method for diffractive optical waveguide |
| WO2023083344A1 (en) * | 2021-11-15 | 2023-05-19 | 上海鲲游科技有限公司 | Pupil expansion region and coupling-out region of modulation optical waveguide, modulation optical waveguide, and modulation method |
| WO2023134671A1 (en) * | 2022-01-13 | 2023-07-20 | 北京驭光科技发展有限公司 | Display device, diffractive optical waveguide for display, and design method therefor |
| CN114545549A (en) * | 2022-01-13 | 2022-05-27 | 嘉兴驭光光电科技有限公司 | Optical waveguide device for diffraction display and display apparatus |
| CN115494574A (en) * | 2022-01-30 | 2022-12-20 | 珠海莫界科技有限公司 | Optical waveguide module and AR display device |
| CN114296244A (en) * | 2022-02-18 | 2022-04-08 | 杭州海康威视数字技术股份有限公司 | Optical waveguide for near-eye display and near-eye display device |
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| CN115793132A (en) * | 2023-01-29 | 2023-03-14 | 北京亮亮视野科技有限公司 | Two-dimensional diffraction grating waveguide structure and near-to-eye display device |
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