CN215867361U - AR shows three-dimensional diffraction optical system and wears equipment - Google Patents
AR shows three-dimensional diffraction optical system and wears equipment Download PDFInfo
- Publication number
- CN215867361U CN215867361U CN202122198337.6U CN202122198337U CN215867361U CN 215867361 U CN215867361 U CN 215867361U CN 202122198337 U CN202122198337 U CN 202122198337U CN 215867361 U CN215867361 U CN 215867361U
- Authority
- CN
- China
- Prior art keywords
- optical waveguide
- display
- optical system
- dimensional
- dimensional diffractive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides an AR display three-dimensional diffraction optical system and wearing equipment, comprising: the optical waveguide formed by splicing comprises more than two optical waveguide units, wherein the end surfaces of the two adjacent optical waveguide units are butted to form an obtuse included angle, and at least one optical waveguide unit is a planar optical waveguide. According to the AR display three-dimensional diffraction optical system, the two-dimensional optical structure in the prior art is improved into the three-dimensional optical structure, and the size of the optical waveguide is improved from two-dimensional expansion to three-dimensional expansion, so that the problem that the transverse size is limited by the wearing requirement of a person when the exit pupil FOV is expanded is solved, the transverse size of the whole optical system is controlled, the exit pupil FOV of the optical system can be obviously improved, and the AR display three-dimensional diffraction optical system has high industrial utilization value.
Description
Technical Field
The utility model relates to the technical field of AR display, in particular to an AR display three-dimensional diffraction optical system and wearing equipment.
Background
The existing mainstream AR optical display schemes mainly include a planar diffraction light waveguide and a planar array light waveguide, and these schemes mainly achieve the purpose of increasing the exit pupil FOV (Field of View) by increasing the optical structure size of the glass substrate and the coupling output end laterally and continuously if the exit pupil FOV needs to be increased. This method of expanding the exit pupil FOV results in an unlimited lateral expansion of the glass substrate size due to the limitations of the human wear requirements, which ultimately results in a limited expansion of the exit pupil FOV. Therefore, how to provide a solution that can both expand the FOV of the exit pupil and meet the wearing requirements of a person is a technical problem that practitioners in the art are in urgent need to solve.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the present invention aims to provide an AR display three-dimensional diffractive optical system and a wearing device, which solve the problem that it is difficult to continue to expand the exit pupil FOV due to the limitation of the wearing requirements of people in the prior art.
The utility model provides an AR display three-dimensional diffraction optical system, comprising:
the optical waveguide formed by splicing comprises more than two optical waveguide units, wherein the end surfaces of the two adjacent optical waveguide units are butted to form an obtuse included angle, and at least one optical waveguide unit is a planar optical waveguide.
The optical waveguide unit has three, and all are planar optical waveguides.
The obtuse angle between the optical waveguide units at the head and tail ends is not less than 120 degrees.
The end faces of two adjacent optical waveguide units are connected through a light-transmitting material, and the refractive index of the light-transmitting material is close to or the same as that of the optical waveguide units.
The two side surfaces between the two optical waveguide units which are butted are also respectively connected to form a continuous surface.
The AR display three-dimensional diffractive optical system further includes:
and the emergent grating is correspondingly arranged on the outer side or inner side surface of the optical waveguide unit.
The AR display three-dimensional diffractive optical system further includes:
and the incident grating is arranged on one of the optical waveguide units.
The AR display three-dimensional diffractive optical system further includes:
and the micro display screen can generate images and project the images to the incident grating.
The AR display three-dimensional diffractive optical system further includes:
and the light ray collimation module is arranged on a light path between the micro display screen and the incident grating.
The utility model also provides wearing equipment comprising the AR display three-dimensional diffraction optical system.
The implementation of the utility model has the following beneficial effects:
according to the AR display three-dimensional diffraction optical system, the two-dimensional optical structure in the prior art is improved into the three-dimensional optical structure, and the size of the optical waveguide is improved from two-dimensional expansion to three-dimensional expansion, so that the problem that the transverse size is limited by the wearing requirement of a person when the exit pupil FOV is expanded is solved, the transverse size of the whole optical system is controlled, the exit pupil FOV of the optical system can be obviously improved, and the AR display three-dimensional diffraction optical system has high industrial utilization value.
Drawings
FIG. 1 is a schematic structural diagram of an AR display three-dimensional diffractive optical system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an AR display three-dimensional diffractive optical system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an AR display three-dimensional diffractive optical system according to an embodiment of the present invention.
Reference numerals in the drawings:
11-a first optical waveguide unit; 12-a second optical waveguide unit; 13-a third optical waveguide unit;
21-a first exit grating; 22-a second exit grating; 23-a third exit grating;
30-an incident grating; 40-micro display screen; 50-light collimation module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood 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 also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The utility model provides an AR (augmented reality) display three-dimensional diffraction optical system which comprises a micro display screen 40, a light ray collimation module 50, an optical waveguide formed by splicing, an incident grating 30 and an emergent grating, wherein the incident grating and the emergent grating are arranged on the optical waveguide, the optical waveguide formed by splicing adopts a plurality of optical waveguide units to be butted between end faces, an obtuse included angle is formed between the two optical waveguide units after the optical waveguide units are butted, and one or all of the optical waveguide units adopt planar optical waveguides. The micro display screen 40 generates an image, light rays of the image enter the incident grating 30 after passing through the collimating optical module 50, then are totally reflected in the optical waveguide and propagate forwards, diffraction is generated after meeting the emergent grating of the first optical waveguide unit, part of light rays of the image are emitted from the first optical waveguide unit and enter human eyes, the rest light rays continue to propagate along the optical waveguide, diffraction is generated again after meeting the emergent grating of the next optical waveguide unit, part of light rays of the image are emitted from the optical waveguide unit and enter the human eyes, and the rest light rays continue to propagate along the optical waveguide and are emitted along other optical waveguide units and enter the human eyes according to the principle. The exit grating can be arranged on the outer side surface of the optical waveguide and also can be arranged on the inner side surface of the optical waveguide, and the using effect of the exit grating is not obviously different and only different in transmission diffraction or reflection diffraction.
In order to facilitate the technical idea of the present invention, the following embodiments are described by taking a planar optical waveguide as an example, but at least some of the optical waveguide units may be replaced by optical waveguide units with a cambered surface or other shapes based on the understanding of those skilled in the art.
Specifically, as shown in fig. 1, in one embodiment, the optical waveguide units have three optical waveguide units, namely a first optical waveguide unit 11, a second optical waveguide unit 12 and a third optical waveguide unit 13, which are all planar optical waveguides, wherein the width of the second optical waveguide unit 12 in the middle position is greater than the widths of the first optical waveguide unit 11 and the third optical waveguide unit 13 on the two sides, and the first optical waveguide unit 11 and the third optical waveguide unit 13 can be generally configured in a left-right symmetrical structure; a first emission grating 21 is provided on the inner surface of the first optical waveguide unit 11, a second emission grating 22 is provided on the inner surface of the second optical waveguide unit 12, and a third emission grating 23 is provided on the inner surface of the third optical waveguide unit 13; the incident grating 30 is disposed on the first optical waveguide unit 11.
The first optical waveguide unit 11 and the second optical waveguide unit 12 are spliced with each other, the second optical waveguide unit 12 and the third optical waveguide unit 13 are spliced with each other, and the splicing angles are both larger than 150 degrees, so that the included angle between the first optical waveguide unit 11 and the third optical waveguide unit 13 is not smaller than 120 degrees.
The end faces of the optical waveguide units are connected through the light-transmitting material, and the refractive index of the light-transmitting material is close to or the same as that of the optical waveguide units, so that optical path transmission is guaranteed to the maximum extent, and loss in the optical path transmission process is reduced.
The two side surfaces between the two butted optical waveguide units are respectively connected to form a continuous surface, so that the loss generated at the butting position of the optical waveguide units in the optical path transmission process is avoided.
In this embodiment, the second optical waveguide unit 12 located in the middle is rectangular, that is, the abutting surfaces at the two ends are vertical surfaces; the abutting surfaces of the first optical waveguide unit 11 and the third optical waveguide unit 13 located at both sides are inclined surfaces. Thereby making the thickness of the second optical waveguide unit 12 slightly larger than the thickness of the first and third optical waveguide units 11 and 13 at both ends. The thickness difference is determined by the included angle between the two, the thickness difference is the smallest when the included angle is close to the straight angle, and the smaller the included angle, the larger the thickness difference.
In this embodiment, the incident grating 30 is disposed on the first optical waveguide unit 11, and the incident grating 30 is located at a position further outside than the first exit grating 21, so that the vision of human eyes is not affected; correspondingly, the micro-display screen 40 and the light collimating module 50 are disposed at a side close to the first light guiding unit 11.
In the AR display three-dimensional diffractive optical system of this embodiment, the two-dimensional optical structure in the prior art is improved to the three-dimensional optical structure, and the optical waveguide size is improved from two-dimensional expansion to three-dimensional expansion, so that the problem that the transverse size is limited by the wearing requirement of a person when the exit pupil FOV is expanded is solved, the transverse size of the whole optical system is controlled, the exit pupil FOV of the optical system can be obviously improved, and the AR display three-dimensional diffractive optical system has a high industrial utilization value.
In another preferred embodiment, as shown in fig. 2, the optical waveguide units have two optical waveguide units, namely a first optical waveguide unit 11 and a second optical waveguide unit 12, and both are planar optical waveguides, wherein the width of the second optical waveguide unit 12 is greater than that of the first optical waveguide unit 11, or may be the same as or slightly less than that of the first optical waveguide unit 11, and the first optical waveguide unit 11 and the second optical waveguide unit 12 may be generally configured in a left-right symmetrical structure; a first emission grating 21 is provided on the inner surface of the first optical waveguide unit 11, and a second emission grating 22 is provided on the inner surface of the second optical waveguide unit 12; the incident grating 30 is disposed on the first optical waveguide unit 11.
The first optical waveguide unit 11 and the second optical waveguide unit 12 are spliced with each other, and the splicing angle is greater than 120 degrees.
The end surfaces of the first optical waveguide unit 11 and the second optical waveguide unit 12 are connected through a light-transmitting material, and the refractive index of the light-transmitting material is close to or the same as that of the optical waveguide unit, so that optical path transmission is ensured to the maximum extent, and loss in the optical path transmission process is reduced.
The two side surfaces between the two butted optical waveguide units are respectively connected to form a continuous surface, so that the loss generated at the butting position of the optical waveguide units in the optical path transmission process is avoided.
In this embodiment, the second optical waveguide unit 12 is rectangular, that is, the abutting surfaces of the two ends are vertical surfaces; the abutting surface of the first optical waveguide unit 11 is an inclined surface. Thereby making the thickness of the second optical waveguide unit 12 slightly larger than the thickness of the first optical waveguide units 11 at both ends. The thickness difference is determined by the included angle between the two, the thickness difference is the smallest when the included angle is close to the straight angle, and the smaller the included angle, the larger the thickness difference.
In this embodiment, the incident grating 30 is disposed on the first optical waveguide unit 11, and the incident grating 30 is located at a position further outside than the first exit grating 21, so that the vision of human eyes is not affected; correspondingly, the micro-display screen 40 and the light collimating module 50 are disposed at a side close to the first light guiding unit 11.
In the AR display three-dimensional diffractive optical system of this embodiment, the two-dimensional optical structure in the prior art is improved to the three-dimensional optical structure, and the optical waveguide size is improved from two-dimensional expansion to three-dimensional expansion, so that the problem that the transverse size is limited by the wearing requirement of a person when the exit pupil FOV is expanded is solved, the transverse size of the whole optical system is controlled, the exit pupil FOV of the optical system can be obviously improved, and the AR display three-dimensional diffractive optical system has a high industrial utilization value.
In another preferred embodiment, as shown in fig. 3, the optical waveguide unit has two optical waveguide units, and the present embodiment is different from the embodiment shown in fig. 2 in that the abutting surfaces of the second optical waveguide unit 12 and the first optical waveguide unit 11 are both inclined surfaces, and it is generally preferable to arrange the second optical waveguide unit 12 and the first optical waveguide unit 11 symmetrically with respect to the abutting surfaces. Thereby making the thickness of the second optical waveguide unit 12 the same as that of the first optical waveguide unit 11. On the basis of this technical idea, when three optical waveguide units as shown in fig. 1 are used, it is necessary to set the second optical waveguide unit 12 located in the middle as an isosceles trapezoid, and the base angle of the isosceles trapezoid is equal to the vertex angle of the first optical waveguide unit 11 and the third optical waveguide unit 13, so that the thicknesses of the three optical waveguide units are all equal
Based on the above embodiments, the optical waveguide units may be set to four or more, and only the adaptive adjustment is required based on the technical explanation above.
The present embodiment also provides a wearable device including the above-described AR display three-dimensional diffractive optical system. The wearable device can be an AR glasses, and additional corresponding functional units need to be provided for the wearable device, such as a power supply for supplying power to the whole wearable device, a processor for data processing, and a control terminal for controlling the use of the wearable device.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An AR display three-dimensional diffractive optical system, comprising:
the optical waveguide formed by splicing comprises more than two optical waveguide units, wherein the end surfaces of the two adjacent optical waveguide units are butted to form an obtuse included angle, and at least one optical waveguide unit is a planar optical waveguide.
2. The AR display three-dimensional diffractive optical system according to claim 1,
the optical waveguide unit has three, and all are planar optical waveguides.
3. The AR display three-dimensional diffractive optical system according to claim 1,
the obtuse angle between the optical waveguide units at the head and tail ends is not less than 120 degrees.
4. The AR display three-dimensional diffractive optical system according to claim 1,
the end faces of two adjacent optical waveguide units are connected through a light-transmitting material, and the refractive index of the light-transmitting material is close to or the same as that of the optical waveguide units.
5. The AR display three-dimensional diffractive optical system according to claim 1,
the two side surfaces between the two optical waveguide units which are butted are also respectively connected to form a continuous surface.
6. The AR display three-dimensional diffractive optical system according to one of claims 1 to 5,
the AR display three-dimensional diffractive optical system further includes:
and the emergent grating is correspondingly arranged on the outer side or inner side surface of the optical waveguide unit.
7. The AR display three-dimensional diffractive optical system according to claim 6,
the AR display three-dimensional diffractive optical system further includes:
and the incident grating is arranged on one of the optical waveguide units.
8. The AR display three-dimensional diffractive optical system according to claim 7,
the AR display three-dimensional diffractive optical system further includes:
and the micro display screen can generate images and project the images to the incident grating.
9. The AR display three-dimensional diffractive optical system according to claim 8,
the AR display three-dimensional diffractive optical system further includes:
and the light ray collimation module is arranged on a light path between the micro display screen and the incident grating.
10. Wearable device, characterized in that it comprises an AR display three-dimensional diffractive optical system according to one of the above claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122198337.6U CN215867361U (en) | 2021-09-10 | 2021-09-10 | AR shows three-dimensional diffraction optical system and wears equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122198337.6U CN215867361U (en) | 2021-09-10 | 2021-09-10 | AR shows three-dimensional diffraction optical system and wears equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215867361U true CN215867361U (en) | 2022-02-18 |
Family
ID=80319332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122198337.6U Active CN215867361U (en) | 2021-09-10 | 2021-09-10 | AR shows three-dimensional diffraction optical system and wears equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215867361U (en) |
-
2021
- 2021-09-10 CN CN202122198337.6U patent/CN215867361U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10955676B2 (en) | Head mounted imaging apparatus with optical coupling | |
| EP3347761B1 (en) | Imaging light guide with reflective turning array | |
| CN110431471B (en) | Method and system for waveguide projector with wide field of view | |
| JP6720315B2 (en) | Imaging light guide with reflective conversion array | |
| CN115586652A (en) | Eyepiece for virtual, augmented or mixed reality systems | |
| CN107771297A (en) | For virtual and augmented reality near-to-eye free form surface type nanostructured surface | |
| US11994684B2 (en) | Image light guide with zoned diffractive optic | |
| CN113495319A (en) | Optical structure and optical device | |
| CN211528820U (en) | Optical structure and augmented reality or virtual reality device | |
| CN214474235U (en) | Near-to-eye display device | |
| US20190094543A1 (en) | Systems, devices, and methods for optical waveguides | |
| CN114637067B (en) | Diffractive optical waveguide and display device | |
| CN210136366U (en) | Apparatus for presenting image and system for implementing augmented reality display | |
| CN112965157A (en) | Two-dimensional grating, optical waveguide and AR glasses | |
| CN114051593B (en) | Near-eye display device, augmented reality glasses including the same, and method of operating the same | |
| JP2023549313A (en) | Slab waveguide and projector with intermodal coupling | |
| CN110873962A (en) | Display system based on waveguide | |
| CN215867361U (en) | AR shows three-dimensional diffraction optical system and wears equipment | |
| EP4050401A1 (en) | Optical system and mixed reality device | |
| CN217443725U (en) | Optical-mechanical system | |
| WO2023273691A1 (en) | Wearable device and manufacturing method therefor | |
| CN112601587A (en) | Dynamic incoupling grating in imaging system | |
| JP7223177B2 (en) | Two-dimensional optical waveguides, virtual and real lightwave beam combiners, and AR devices | |
| CN112213855B (en) | Display device and optical waveguide lens | |
| CN114415283A (en) | Multichannel diffraction optical waveguide device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |