CN112596245A - Optical assembly and AR equipment - Google Patents
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- CN112596245A CN112596245A CN202011584538.3A CN202011584538A CN112596245A CN 112596245 A CN112596245 A CN 112596245A CN 202011584538 A CN202011584538 A CN 202011584538A CN 112596245 A CN112596245 A CN 112596245A
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- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003190 augmentative effect Effects 0.000 description 3
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- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
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- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical compound [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 description 1
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Images
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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
- 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
- G02B2027/0178—Eyeglass type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The embodiment of the application provides an optical assembly and AR equipment, and this optical assembly is applied to AR equipment, optical assembly includes: a display component; an optical element based on a birefringence effect, the optical element being spaced apart from the display component; at least part of light emitted by the display assembly is perpendicularly incident to an incident surface of the optical element, and the optical element converts at least part of light from the display assembly into o-light and e-light and emits the o-light and the e-light; the optical element and the display component can move relatively to expand the exit range of the e light. According to the technical scheme, the optical element based on the birefringence effect is arranged on the light path emitted by the display assembly, at least part of light emitted by the display assembly is converted into o light and e light by the optical element, and the optical element and the display assembly move relatively to enlarge the emitting range of the e light, so that the moving eye socket range of the whole optical assembly is enlarged, and the user experience is integrally improved.
Description
Technical Field
The application relates to the technical field of intelligent equipment, in particular to an optical assembly and an AR (augmented reality) device.
Background
The AR equipment is intelligent connection equipment of a virtual world and a real world, the real world and virtual contents can be seen through AR glasses, and information interaction such as vision, hearing and the like can be carried out.
Most of the existing intelligent AR devices, especially head-mounted augmented reality near-eye display devices, expand the range of the eye-moving frame by means of diffraction light waveguides. In general, the range of the eyebox is strongly related to the size of the coupling-out area, and enlarging the eyebox can enhance the user experience. However, the difficulty in enlarging the orbit is high.
Disclosure of Invention
The main objective of this application provides an optical assembly and AR equipment, aims at solving present intelligent AR equipment, enlarges and moves the great problem of the eye socket realization degree of difficulty to wholly promote user experience.
To achieve the above object, the present application provides an optical assembly applied to an AR device, the optical assembly including: a display component; an optical element based on a birefringence effect, the optical element being spaced apart from the display component; at least part of light emitted by the display assembly is perpendicularly incident to an incident surface of the optical element, and the optical element converts at least part of light from the display assembly into o-light and e-light and emits the o-light and the e-light; the optical element and the display component can move relatively to expand the exit range of the e light.
Optionally, the o light forms at least one o light separation image after being transmitted out of the optical element; the e-light is transmitted out of the optical element to form at least one e-light separated image.
Optionally, the display assembly moves relative to the optical element with a preset trajectory in a direction parallel to the incident surface, and/or the optical element moves relative to the display assembly with a preset trajectory.
Optionally, the preset trajectory is a straight trajectory and/or a circular trajectory.
Optionally, the optical element rotates with its central axis relative to the display assembly.
Optionally, the optical element comprises: uniaxial birefringent crystals, optical elements based on stress birefringence effect, or optical elements based on electro-birefringence effect.
Optionally, the refractive index of the optical element for o light is a first refractive index, the refractive index for e light is a second refractive index, and a difference between the second refractive index and the first fold line ratio is greater than 0.15.
Optionally, the thickness between the entrance face and the exit face of the optical element is greater than 5 mm.
In addition, the present application also provides an AR device, which includes the optical assembly of any one of the above items, and a housing, wherein the display assembly and the optical element are disposed on the housing at an interval.
Optionally, the housing comprises: the spectacle comprises a spectacle frame, spectacle frames are arranged on the left side and the right side of the spectacle frame, and a lens is arranged in each spectacle frame; the two glasses legs are respectively arranged at the left end and the right end of the glasses frame, at least one of the glasses legs is provided with the display assembly and/or the optical element, and light of the display assembly passes through the optical element to form o light and e light and is emitted.
Optionally, the AR device comprises a housing for wearing on a user's head and; at least one group of optical elements is arranged in the shell, and light of the display assembly passes through the optical elements to form o light and e light and is emitted.
According to the technical scheme, the optical element based on the birefringence effect is arranged on the light path emitted by the display assembly, at least part of light emitted by the display assembly is converted into o light and e light by the optical element, and the optical element and the display assembly move relatively to enlarge the emitting range of the e light, so that the moving eye socket range of the whole optical assembly is enlarged, and the user experience is integrally improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an optical assembly according to the present application;
FIG. 2 is a schematic structural diagram of an optical assembly according to yet another embodiment of the present application;
FIG. 3 is a schematic structural diagram of another embodiment of an optical assembly of the present application;
fig. 4 is a schematic structural diagram of an embodiment of an AR device according to the present application.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
10 | |
| 20 | |
200 | |
| 210 | |
220 | |
| 230 | Lens |
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions referred to as "first", "second", etc. in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
The optical assembly of the embodiment of the application is mainly applied to AR equipment, such as AR glasses or AR helmets. At present, the AR device, especially the head-mounted augmented reality near-to-eye display device, has various display indexes closely related to characteristics of a human visual system, and is directly related to user experience, such as angular resolution, chromatic aberration, brightness, field of view (FOV) and eye movement frame (Eyebox) range.
The eye orbit movement is a very important factor of the head-mounted display device, and particularly in the AR device, the range of the virtual image which can be seen by the user is directly influenced, namely the flexibility of the user wearing the AR glasses in daily life is determined. For example, if the Eyebox is too small and moves the eyeball a little, the virtual content can be seen incompletely, which greatly reduces the user experience.
As shown in fig. 1 to 4, the present application proposes an optical assembly 100 applied to an AR device, the optical assembly 100 including: a display assembly 10 for presenting a virtual image; an optical element 20 based on a birefringence effect, the optical element 20 being spaced apart from the display assembly 10; at least part of the light emitted from the display assembly 10 is perpendicularly incident on the incident surface of the optical element 20, and the optical element 20 converts at least part of the light from the display assembly 10 into o-light and e-light and emits the o-light and the e-light; the optical element 20 and the display module 10 are relatively movable to expand the exit range of the e-light.
In the embodiment of the present application, in order to expand the range of the movable eye frame, the optical element 20 based on the birefringence effect is disposed in the light beam emitting direction of the display module 10, a virtual image to be presented to human eyes is transmitted to the optical element 20 based on the birefringence effect, at least a part of light rays emitted from the display module 10 are refracted into o light and e light by the optical element 20 based on the birefringence effect, a separation image of the generated e light is made to move rapidly in the expanded movable eye frame area, and the range of the movable eye frame is expanded by the e light based on the persistence of vision.
According to the technical scheme, the optical element based on the birefringence effect is arranged on the light path emitted by the display assembly, at least part of light emitted by the display assembly is converted into o light and e light by the optical element, and the optical element and the display assembly move relatively to enlarge the emitting range of the e light, so that the moving eye socket range of the whole optical assembly is enlarged, and the user experience is integrally improved.
It should be noted that the optical element based on the birefringence effect in the embodiment of the present application may specifically be a uniaxial birefringence crystal, an optical element based on a stress birefringence effect, an optical element based on an electro birefringence effect, or the like.
It is understood that birefringence is a phenomenon in which a light beam incident on an anisotropic crystal is decomposed into two light beams and refracted in different directions. When light propagates in a non-homogeneous body, the refractive indexes of substances for o light and e light are different, so that the propagation speed and the refractive index value of the substances are changed along with the different vibration directions, and the phenomenon is birefringence. When the crystal rotates, the imaging position of the e light rotates around the o light.
In some embodiments, the o light is transmitted out of the optical element to form at least one o light split image; the e-light is transmitted out of the optical element to form at least one e-light separated image. For example, the o light transmitted out of the optical element may form an o light split image, which may be located at the center of the outgoing light ray. After the e light is transmitted out of the optical element, a plurality of e light separation images can be formed, and the e light separation images can be uniformly or non-uniformly distributed around the o light separation images; based on the persistence of vision of human eyes, the e-ray separated images viewed by the eyes of the user are the same image.
It will be appreciated that in order to ensure that the light rays emitted from the display module 10 form a complete virtual image, it is necessary to ensure that at least some of the light rays of the display module 10 are incident perpendicularly to the incident surface of the optical element 20 based on the birefringence effect. For example, the light rays in the predetermined central region of the display module 10 are incident perpendicularly to the incident surface of the optical element 20, and the light rays in the predetermined edge region of the display module 10 are incident at a non-right angle to the incident surface of the optical element 20.
In some embodiments, the display assembly moves relative to the optical element with a predetermined trajectory in a direction parallel to the plane of incidence, and/or the optical element moves relative to the display assembly with a predetermined trajectory. The preset trajectory may be a straight trajectory and/or a circular trajectory.
Specifically, the relative movement of the display module 10 and the optical element 20 may be the movement of the display module 10 relative to the optical element 20 on a plane parallel to the incident surface, or the movement may be a linear reciprocating movement, a circular movement, or the like, based on the movement of the optical element 20 relative to the display module 10 on a plane parallel to the incident surface. Through the structure, the e-light emitting range can be enlarged on the premise of not changing the characteristics of the light beams emitted by the display assembly 10, so that the purpose of enlarging the range of the eye moving frame is achieved, and the incomplete virtual content seen by a user is avoided.
In some embodiments, the display element 10 may be an opto-mechanical system, and the frame of light emitted by the opto-mechanical system (micro-projection or flat panel display) is rectangular or circular, and the axial cross-section of the optical element 20 based on the birefringence effect may be similar to that of the optical system, so that the movement of the display element 10 relative to the optical element 20 in a plane parallel to the incident plane is: firstly, the optical-mechanical system reciprocates in the radial direction thereof, so that the light-emitting range of the optical-mechanical system is enlarged, and the e light tiling range refracted by the optical element 20 based on the double refraction effect is enlarged; secondly, the group axis of the light emitted from the optical-mechanical system is used as the central axis, so that the optical-mechanical system has a certain distance relative to the central axis and moves circularly around the central axis, and the spreading range of the e light refracted by the optical element 20 based on the birefringence effect is enlarged.
The movement of the optical element 20 based on the birefringence effect with respect to the display component 10 in a plane parallel to the plane of incidence may be: the first optical element 20 based on the birefringence effect reciprocates in the radial direction thereof, so that the tiling range of the e light refracted by the optical element 20 based on the birefringence effect is enlarged; secondly, the central axis of the light-emitting surface of the optical-mechanical system makes the optical element 20 based on the birefringence effect have a certain distance relative to the central axis and circularly move around the central axis, so that the tiling range of the e light refracted by the optical element 20 based on the birefringence effect is enlarged.
Specifically, the preset trajectory is a linear trajectory along which the display assembly 10 performs a reciprocating translational motion relative to the birefringence-based optical element 20. In this embodiment, the predetermined track may be a linear track, as shown in fig. 1, on the surface parallel to the incident surface, the display module 10 is linearly reciprocated, so that the light emitting range of the optical mechanical system is enlarged, and the spreading range of the e light refracted by the optical element 20 based on the birefringence effect is enlarged.
It will be appreciated that if each set of optical assemblies 100 corresponds to a single human eye, then when two sets of optical assemblies 100 are used, they are arranged as mirror images laterally along the binocular direction with respect to the center point of the human eye. The directions of the optical axes of the display module 10 or the optical element 20 based on the birefringence effect are the same, that is, the optical axis is perpendicular to the incident plane of the optical element 20 based on the birefringence effect, the reciprocating and translational motion needs to be perpendicular to the optical axis, the specific motion direction in the plane is determined according to the specific optical design of the system, and the motion direction enables the reflected light incident to human eyes to synchronously realize one-dimensional or two-dimensional tiling.
It is understood that the moving speed and the moving distance of the display module 10 are related to the thickness and the difference of the main refractive index of the optical element 20 based on the birefringence effect, but the moving period is required to be less than the persistence time so as to ensure that the human eye does not obviously detect the position or intensity change of the image, and the Eyebox size of the image is preferably not less than 20 × 20 mm.
Specifically, the preset track is a circumferential track, and the display module 10 moves circumferentially relative to the optical element 20 along the circumferential track to expand the exit range of the e-light. In this embodiment, the preset track may be a circular track, as shown in fig. 2, the display module 10 is set as an optical-mechanical system, and the axis of the light-emitting group of the optical-mechanical system is used as a central axis, so that the light-emitting part of the optical-mechanical system has a certain distance with respect to the central axis and performs a circular motion around the central axis, thereby enlarging the e-light tiling range refracted by the optical element 20.
Specifically, the predetermined track may be a circular track, and the optical element 20 based on the birefringence effect moves circumferentially relative to the display module 10 along the circular track to expand the exit range of the e-light. In this embodiment, the display module 10 is an optical-mechanical system, and the axis of the light exit surface of the optical-mechanical system is used as the central axis, so that the optical element 20 has a certain distance with respect to the central axis and moves circularly around the central axis, thereby enlarging the e-ray tiling range refracted by the optical element 20.
As shown in fig. 3, in particular, the optical element 20 can rotate with respect to the display module 10 about its central axis. In this embodiment, since the optical element 20 has a crystal surface with a different angle from the incident surface, when the optical element 20 is rotated, the crystal axis in the optical element 20 can change its orientation, so that the optical element 20 refracts e-light from different orientations, thereby expanding the emission range of the e-light.
Specifically, the refractive index of the optical element 20 for o light is a first refractive index, the refractive index for e light is a second refractive index, and the difference between the second refractive index and the first fold line ratio is greater than 0.15. In this embodiment, taking the example that the display module 10 moves relative to the optical element 20 on a plane parallel to the incident surface as an example, after the light beam transmitted by the display module 10 enters the optical element 20, in order to ensure that the two birefringent light beams are separated by a certain distance, it is preferable that the difference Δ n between the first refractive index of the optical element 20 for o light and the second refractive index of the optical element 20 for e light is greater than 0.15. The optical axis of the birefringent crystal is oblique to the crystal surface, the incident light is vertically incident to the crystal, and the incident plane and the emergent plane of the crystal are parallel.
Specifically, the thickness between the incident surface and the exit surface of the optical element 20 is greater than 5 mm. In this embodiment, taking the example that the display module 10 moves on a plane parallel to the incident surface relative to the optical element 20 as an example, since the range of the movable frame is related to the refractive index difference and the thickness of the optical element 20, after the optical element 20 is placed still, the optical element 20 of the display module 10 is disposed in the temple 220 of the AR glasses and integrated inside the structure of the temple 220, the thickness of the optical element 20 is not less than 5mm, and the birefringent image (light beam) can be reflected by the lens 230 of the AR glasses and then incident to the human eye.
Specifically, the optical element 20 is formed of a uniaxial birefringent crystal. In this embodiment, the material of the optical element 20 based on the birefringence effect may be yttrium vanadate (YVO4), titanium dioxide (TiO2), calcite (CaCO 3).
In the structure, the effect of expanding the movable eye frame is realized through geometric optics, and the problem of chromatic aberration can not be introduced.
In addition, the optical element 20 may be an optical element based on a stress birefringence effect, which generates anisotropy based on mechanical stress, and the transparent isotropic medium may exhibit optical anisotropy by changing refractive index characteristics under pressure or tension.
Furthermore, the optical element 20 may also be an optical element based on the electro-birefringence effect. For example, a transparent cell containing a parallel plate capacitor is filled with a specific liquid (e.g., nitrobenzene), and an inter-electrode voltage is applied to generate an electric field between the two plates, which causes the liquid to become an anisotropic medium and generate birefringence. Or, after an electric field is applied to KDP (potassium dihydrogen phosphate) in a specific direction, birefringence is generated in the crystal for incident light in a specific direction.
As shown in fig. 4, the present embodiment further provides an AR device 200, which includes the optical assembly 100 described above, and a housing (not labeled in the figure) on which the display assembly 10 and the optical element 20 based on the birefringence effect are disposed at intervals. The specific structure of the optical assembly 100 refers to the above embodiments, and since the AR device 200 adopts at least part of the technical solutions of the above embodiments, at least the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
In some embodiments, the housing comprises: the spectacle frame comprises a spectacle frame 210, wherein spectacle frames are arranged on the left side and the right side of the spectacle frame 210, and a lens 230 is arranged in each spectacle frame; the two glasses legs 220 are respectively disposed at the left end and the right end of the glasses frame, at least one of the glasses legs 220 is provided with the display module 10 and/or the optical element 20 based on the birefringence effect, and light of the display module 10 passes through the optical element 20 to form o light and e light and then is emitted. The o-light and the e-light emitted from the optical element 20 may be directly incident on the eyes of the user, or may be irradiated to the lens 230 and then reflected to the eyes of the user through the lens 230.
In some embodiments, the optical assembly 100 may be applied to glasses to form AR glasses, wherein the display assembly 10 and the optical element 20 are integrally disposed on the temple 220, and light of the display assembly 10 passes through the optical element 20 based on birefringence effect to form o light and e light, and is irradiated onto the lens 230 and reflected to human eyes through the lens 230.
Specifically, the lens 230 is made of optical resin. In this embodiment, the material of the lens 230 may be PMMA, or a high-refractive-index low-dispersion high-transmittance glass material such as corning and schottky. In addition, the lens 230 may also be made of optical waveguide material.
In this embodiment, the optical assembly 100 may be applied to a head-mounted housing to form the AR device 200, for example, the housing is a helmet, a window is disposed on the helmet, a position of the window is opposite to a position of the human eye, the optical assembly 100 is disposed in the housing, and light of the display assembly 10 passes through the optical element 20 based on the birefringence effect to form o light and e light, and is incident to the human eye through the window.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which is conceived to be equivalent to the above description and the accompanying drawings, or to be directly/indirectly applied to other related arts, are intended to be included within the scope of the present application.
Claims (11)
1. An optical assembly for use in an AR device, the optical assembly comprising:
a display component;
an optical element based on a birefringence effect, the optical element being spaced apart from the display component;
at least part of light emitted by the display assembly is perpendicularly incident to an incident surface of the optical element, and the optical element converts at least part of light from the display assembly into o-light and e-light and emits the o-light and the e-light; the optical element and the display component can move relatively to expand the exit range of the e light.
2. The optical assembly of claim 1,
the o light forms at least one o light separation image after being transmitted out of the optical element;
the e-light is transmitted out of the optical element to form at least one e-light separated image.
3. Optical assembly according to claim 1, characterized in that the display assembly is moved with respect to the optical element with a predetermined trajectory in a direction parallel to the entrance face and/or the optical element is moved with respect to the display assembly with a predetermined trajectory.
4. An optical assembly according to claim 3, wherein the predetermined trajectory is a straight trajectory and/or a circumferential trajectory.
5. The optical assembly of claim 1 wherein the optical element rotates with its central axis relative to the display assembly.
6. The optical assembly of claim 1, wherein the optical element comprises:
uniaxial birefringent crystals, optical elements based on stress birefringence effect, or optical elements based on electro-birefringence effect.
7. The optical assembly of claim 1, wherein the optical element has a first refractive index for o-light and a second refractive index for e-light, the second refractive index differing from the first fold line by more than 0.15.
8. The optical assembly of claim 1, wherein the thickness between the entrance face to the exit face of the optical element is greater than 5 mm.
9. An AR device comprising an optical assembly as claimed in any one of claims 1 to 8, and a housing, wherein the display assembly and the optical element are spaced apart on the housing.
10. The AR device of claim 9, wherein the housing comprises:
the spectacle comprises a spectacle frame, spectacle frames are arranged on the left side and the right side of the spectacle frame, and a lens is arranged in each spectacle frame;
the two glasses legs are respectively arranged at the left end and the right end of the glasses frame, at least one of the glasses legs is provided with the display assembly and/or the optical element, and light of the display assembly passes through the optical element to form o light and e light and is emitted.
11. The AR device of claim 9, wherein the AR device comprises a housing for wearing on a head of a user;
the optical elements are arranged in the shell, and light emitted by the display assembly passes through the optical elements to form o light and e light and is emitted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011584538.3A CN112596245A (en) | 2020-12-28 | 2020-12-28 | Optical assembly and AR equipment |
| PCT/CN2021/122520 WO2022142565A1 (en) | 2020-12-28 | 2021-10-07 | Optical assembly and ar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011584538.3A CN112596245A (en) | 2020-12-28 | 2020-12-28 | Optical assembly and AR equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112596245A true CN112596245A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011584538.3A Pending CN112596245A (en) | 2020-12-28 | 2020-12-28 | Optical assembly and AR equipment |
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| Country | Link |
|---|---|
| CN (1) | CN112596245A (en) |
| WO (1) | WO2022142565A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323572A (en) * | 2021-11-30 | 2022-04-12 | 歌尔光学科技有限公司 | Optical module Eyebox measuring method and measuring system |
| WO2022142565A1 (en) * | 2020-12-28 | 2022-07-07 | 歌尔股份有限公司 | Optical assembly and ar device |
| CN114740625A (en) * | 2022-04-28 | 2022-07-12 | 珠海莫界科技有限公司 | Optical machine, control method of optical machine and AR near-to-eye display device |
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Effective date of registration: 20221208 Address after: 261031 workshop 1, phase III, Geer Photoelectric Industrial Park, 3999 Huixian Road, Yongchun community, Qingchi street, high tech Zone, Weifang City, Shandong Province Applicant after: GoerTek Optical Technology Co.,Ltd. Address before: 261031 No. 268 Dongfang Road, hi tech Industrial Development Zone, Shandong, Weifang Applicant before: GOERTEK Inc. |
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