CN219456634U - AR waveguide lens structure - Google Patents
AR waveguide lens structure Download PDFInfo
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- CN219456634U CN219456634U CN202223532565.3U CN202223532565U CN219456634U CN 219456634 U CN219456634 U CN 219456634U CN 202223532565 U CN202223532565 U CN 202223532565U CN 219456634 U CN219456634 U CN 219456634U
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Abstract
The utility model discloses an AR waveguide lens structure, which comprises a waveguide lens and a protective sheet for protecting the waveguide lens, wherein the protective sheet is at least blocked at one side of the waveguide lens, supporting glue for fixing the protective sheet is annularly smeared on the edge of the waveguide lens, and the protective sheet is fixed on the supporting glue; filling pouring sealant in an annular edge gap formed among the waveguide lens, the protective sheet and the supporting glue, wherein the pouring sealant surrounds the outer side of the supporting glue and is connected with the supporting glue into a whole; and the inner side gap formed among the waveguide lens, the protective sheet and the supporting glue forms a cavity. Therefore, the edge gaps among the waveguide lens, the protective sheet and the supporting glue are filled with the pouring sealant, so that the inner cavity among the waveguide lens, the protective sheet and the supporting glue is better sealed, water vapor, liquid and the like are prevented from entering the cavity, irreversible corrosion damage is caused to the grating, and the capacity of the AR glasses for adapting to the environment is improved.
Description
Technical Field
The utility model relates to the technical field of AR (augmented reality) glasses, in particular to an AR waveguide lens structure.
Background
The AR waveguide lens is a key component of AR glasses, and is used for transmitting external ambient light directly into human eyes, and transmitting display information of the micro display element to human eyes through coupling in a predetermined mode. The user receives the virtual image by wearing the AR waveguide lens, so that the preset visual effect of the AR technology is realized. The best solution currently considered to realize the AR technology path is a surface relief waveguide based on the photolithography technology, which is generally manufactured by spin coating, i.e. uniformly coating a photoresist on the surface of a medium (typically glass, resin, etc.) with a higher refractive index, and embossing a grating on the film to realize the desired optical effect.
However, when an AR waveguide lens is used as an optical member, it is susceptible to damage or influence on the use effect when it is subjected to external impact or contamination. An optical resin protective member (generally referred to as a protective sheet, hereinafter collectively referred to as a protective sheet) is usually attached to the outside of the optical resin protective member, but such a protective method suffers from problems such as material processing, and thus the AR waveguide glasses cannot be sealed completely. Therefore, sweat, water vapor and the like easily enter the AR waveguide to generate certain corrosion damage to the grating in the using process, thereby affecting the display effect of the AR waveguide lens. Therefore, improvements should be made to solve the above-described problems.
Disclosure of Invention
In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its main objective is to provide an AR waveguide lens structure, which fills a potting adhesive in an edge gap between a waveguide lens, a protective sheet and a supporting adhesive, so that an inner cavity between the waveguide lens, the protective sheet and the supporting adhesive is better sealed, water vapor, liquid and the like are prevented from entering the cavity, causing irreversible corrosion damage to a grating, and improving the environment adaptation capability of AR glasses.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the AR waveguide lens structure comprises a waveguide lens and a protective sheet for protecting the waveguide lens, wherein the protective sheet is at least blocked at one side of the waveguide lens, supporting glue for fixing the protective sheet is annularly smeared on the edge of the waveguide lens, and the protective sheet is fixed on the supporting glue; filling pouring sealant in an annular edge gap formed among the waveguide lens, the protective sheet and the supporting glue, wherein the pouring sealant surrounds the outer side of the supporting glue and is connected with the supporting glue into a whole; and the inner side gap formed among the waveguide lens, the protective sheet and the supporting glue forms a cavity.
As a preferred embodiment: the cavity is filled with nitrogen, an inflation port for inflating the nitrogen into the cavity is formed in the supporting glue which is annularly distributed, and the pouring sealant seals the inflation port.
As a preferred embodiment: and air holes for communicating the cavity with outside air are formed in the supporting glue and the pouring sealant in a penetrating mode.
As a preferred embodiment: the number of the air holes is one or more.
As a preferred embodiment: the air holes are regular or irregular.
As a preferred embodiment: the gap distance between the waveguide lens and the protective sheet is less than or equal to 0.2mm.
As a preferred embodiment: the supporting glue and the pouring sealant are UV glue or resin glue.
As a preferred embodiment: the width of the air hole is less than or equal to 0.3mm.
As a preferred embodiment: the waveguide lens and the protective sheet are made of resin.
As a preferred embodiment: the protective sheets are two, the waveguide lens is positioned between the two protective sheets, and the supporting glue and the pouring sealant are respectively arranged between the waveguide lens and the two protective sheets.
Compared with the prior art, the utility model has obvious advantages and beneficial effects, in particular, according to the technical scheme, the edge gaps among the waveguide lens, the protective sheet and the supporting glue are filled with the pouring sealant, so that the inner cavities among the waveguide lens, the protective sheet and the supporting glue are better sealed, water vapor, liquid and the like are prevented from entering the cavities, irreversible corrosion damage is caused to the grating, and the capacity of the AR glasses for adapting to the environment is improved. Moreover, the structure has little change to the existing process production, and is convenient for standardized mass production.
In addition, the waveguide lens structure can be filled with nitrogen in the cavity and is completely sealed by the pouring sealant, so that the cavity is isolated from the outside, water vapor and liquid are prevented from entering, and the internal grating is better protected from damage. And air holes can be formed in the pouring sealant and the supporting adhesive in a penetrating manner, so that air pressure inside and outside the cavity is balanced, the AR glasses are suitable for application scenes under different air pressure changes, such as high-altitude areas or other environments with large air pressure change ranges, and the environment adaptability of the AR glasses is improved.
In order to more clearly illustrate the structural features and efficacy of the present utility model, a detailed description thereof will be given below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic cross-sectional view of a single protective sheet of the present utility model without pouring a potting compound;
FIG. 2 is a schematic cross-sectional view of a single protective sheet of the present utility model in a state of pouring a potting adhesive;
FIG. 3 is a schematic cross-sectional view of the two protective sheets of the present utility model in a state of pouring potting adhesive;
FIG. 4 is a schematic cross-sectional view of the product of FIG. 2 after being purged with nitrogen at A-A;
FIG. 5 is a schematic cross-sectional view of the product of FIG. 2 at A-A with an air hole;
FIG. 6 is a schematic cross-sectional view of the product of FIG. 2, wherein a special-shaped air hole is formed at A-A;
FIG. 7 is a schematic cross-sectional view of the product of FIG. 2 at A-A with two air holes;
FIG. 8 is a schematic cross-sectional view of the product of FIG. 2 at A-A with two air holes facing each other;
FIG. 9 is a schematic cross-sectional view of an alternative lens shape with air holes at A-A of FIG. 2.
The attached drawings are used for identifying and describing:
10. a waveguide lens; 20. a protective sheet; 30. supporting glue; 31. an inflation inlet; 40. pouring sealant; 50. an edge slit; 60. a cavity; 70. and (5) air holes.
Detailed Description
The present utility model, as shown in fig. 1 to 9, is an AR waveguide lens structure, comprising a waveguide lens 10 and a protection sheet 20 for protecting the waveguide lens 10, wherein:
the protective sheet 20 is blocked at one side of the waveguide lens 10, a supporting adhesive 30 for fixing the protective sheet 20 is annularly smeared on the edge of the waveguide lens 10, the protective sheet 20 is fixed on the waveguide lens 10 through the supporting adhesive 30, and the gap distance between the waveguide lens 10 and the protective sheet 20 is less than or equal to 0.2mm; the annular edge gap 50 formed among the waveguide lens 10, the protective sheet 20 and the supporting glue 30 is filled with pouring sealant 40, and the pouring sealant 40 surrounds the outer side of the supporting glue 30 and is connected with the supporting glue 30 into a whole; the supporting glue 30 and the potting glue 40 are UV glue or resin glue, but are not limited to the two materials; the waveguide lens 10 and the protective sheet 20 are made of resin.
The inner gap formed between the waveguide lens 10, the protective sheet 20 and the supporting glue 30 forms a cavity 60, and the cavity 60 can be filled with nitrogen; and the support glue 30 which is annularly distributed is provided with an inflation inlet 31 for inflating nitrogen into the cavity 60, and the pouring sealant 40 seals the inflation inlet 31. Specifically, before the support glue 30 is smeared for one circle, a notch is reserved in advance as an inflation inlet 31, and therefore the inflation inlet 31 injects nitrogen into the cavity 60; after this step, pouring a pouring sealant 40 between the waveguide lens 10, the supporting glue 30 and the protective sheet 20, and forming a complete seal around the waveguide lens 10 after the pouring sealant 40 is cured, so that the position of the inflation inlet 31 is completely blocked. At this time, the protective sheet 20 and the pouring sealant 40 can protect the waveguide lens 10 and completely isolate water vapor, so that the external moist air and liquid can be effectively prevented from entering the cavity 60 to corrode and damage the waveguide grating. The problem of irreversible corrosion damage to the AR waveguide caused by the fact that water vapor and liquid cannot be prevented from entering in a conventional AR waveguide lens structure is solved.
In order to keep the air pressure inside and outside the cavity 60 uniform, the AR glasses can still ensure the air pressure inside and outside to be consistent under the scene of great air pressure change such as elevation and the like, and the air pressure change does not damage the grating inside. The supporting glue 30 and the pouring glue 40 are provided with air holes 70 (the break-off points and break-off lengths of the supporting glue 30 and the pouring glue 40 are changed to form air holes with different lengths and positions) which are used for communicating the cavity 60 with the outside air, the number of the air holes 70 can be one or more, and the shape of the air holes 70 can be a regular shape (square, round, triangular, etc.) or an irregular shape (as shown in fig. 6); the opening width of the air hole 70 is less than or equal to 0.3mm.
As shown in fig. 5, an air hole 70 is formed on the waveguide lens structure to make the air pressure inside and outside the cavity 60 equal, so that the air pressure inside and outside the AR glasses can be ensured to be consistent in the scene of large air pressure change such as elevation, and the internal grating cannot be damaged due to air pressure change.
As shown in fig. 7 and 8, two air holes 70 are formed on the waveguide lens structure, and compared with the way of forming one air hole, the two air holes 70 can ensure that the internal air pressure and the external air pressure are consistent, and the internal grating is not damaged due to the change of the air pressure; the cavity 60 and the outside can be also made to form air convection, so that the water vapor can be automatically discharged under the condition that the water vapor enters the inside of the AR glasses in the using process, and the working stability of the AR glasses is improved.
As shown in fig. 6, an irregularly shaped air hole 70 is formed on the waveguide lens structure, and in this case, compared with the irregularly shaped air hole 70, the irregularly shaped air hole 70 not only can ensure the consistent air pressure inside and outside the cavity 60, but also can not damage the grating inside due to air pressure change; and the anti-reflection type AR glasses can also generate certain blocking for water vapor or liquid, so that the water vapor or liquid is difficult to enter the AR glasses to damage the gratings.
The number, position, shape, size, etc. of the air holes 70 may be designed according to the actual use environment.
In addition, the grating may be embossed on one side of the waveguide lens 10, or may be embossed on both sides, and the AR waveguide may be formed by one entrance pupil unit, one exit pupil unit, or one entrance pupil unit, two exit pupil units, or two exit pupil units;
the protective sheet 20 covering the outer side of the waveguide lens 10 may be a single sheet or may be a double sheet, which is the case for the single sheet.
The structure of the single protective sheet 20 is shown in fig. 1 and 2, and the waveguide lens 10 with the single embossed grating is generally adopted, one protective sheet 20 is covered on the surface with the embossed grating, a circle of UV glue with a certain thickness (generally less than or equal to 0.1 mm) and a certain width is generally smeared along the edge of the protective sheet 20 as a supporting glue 30 in the conventional process, then the protective sheet 20 and the waveguide lens 10 are placed together in parallel, and finally UV curing is carried out to make the protective sheet and the waveguide lens be attached.
As shown in fig. 3, the structure of the double-sheet protection sheet 20 is different from that of the single-sheet protection sheet 20 in that the structure of the double-sheet protection sheet 20 can be adopted on the waveguide lens 10 with the grating stamped on one side, or on the waveguide lens 10 with the grating stamped on both sides, if the waveguide lens 10 with the grating stamped on one side is adopted, a protection sheet 20 is attached to the back of the grating surface by adopting the same method as that of the single-sheet protection sheet 20, and the double-sheet protection sheet 20 is mainly used for preventing the pollution of the waveguide lens 10 such as dirt, fingerprint and the like from damaging the total reflection surface of the waveguide lens 10 so as to influence the imaging effect; in the case of the waveguide lens 10 with grating embossed on both sides, one protective sheet 20 is attached to each of both sides in the same manner as the single protective sheet 20, and the two protective sheets 20 function identically. When the number of the protective sheets 20 is two, the waveguide lens 10 is positioned between the two protective sheets 20, and the supporting glue 30 and the pouring sealant 40 are respectively arranged between the waveguide lens 10 and the two protective sheets 20; the supporting glue 30 and the potting glue 40 are arranged in the same manner as in the case of the single protective sheet 20.
The utility model is designed with the key that the edge gaps among the waveguide lens, the protective sheet and the supporting glue are filled with the pouring sealant, so that the inner cavities among the waveguide lens, the protective sheet and the supporting glue are better sealed, water vapor, liquid and the like are prevented from entering the cavities, irreversible corrosion damage is caused to the grating, and the capacity of the AR glasses for adapting to the environment is improved. Moreover, the structure has little change to the existing process production, and is convenient for standardized mass production.
In addition, the waveguide lens structure can be filled with nitrogen in the cavity and is completely sealed by the pouring sealant, so that the cavity is isolated from the outside, water vapor and liquid are prevented from entering, and the internal grating is better protected from damage. And air holes can be formed in the pouring sealant and the supporting adhesive in a penetrating manner, so that air pressure inside and outside the cavity is balanced, the AR glasses are suitable for application scenes under different air pressure changes, such as high-altitude areas or other environments with large air pressure change ranges, and the environment adaptability of the AR glasses is improved.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model still fall within the scope of the technical solutions of the present utility model.
Claims (9)
1. An AR waveguide lens structure, characterized in that: the protective sheet is at least blocked at one side of the waveguide lens, supporting glue for fixing the protective sheet is annularly smeared on the edge of the waveguide lens, and the protective sheet is fixed on the supporting glue; filling pouring sealant in an annular edge gap formed among the waveguide lens, the protective sheet and the supporting glue, wherein the pouring sealant surrounds the outer side of the supporting glue and is connected with the supporting glue into a whole; and the inner side gap formed among the waveguide lens, the protective sheet and the supporting glue forms a cavity.
2. The AR waveguide lens structure according to claim 1, wherein: the cavity is filled with nitrogen, an inflation port for inflating the nitrogen into the cavity is formed in the supporting glue which is annularly distributed, and the pouring sealant seals the inflation port.
3. The AR waveguide lens structure according to claim 1, wherein: and air holes for communicating the cavity with outside air are formed in the supporting glue and the pouring sealant in a penetrating mode.
4. An AR waveguide lens structure according to claim 3, wherein: the number of the air holes is one or more.
5. The AR waveguide lens structure according to claim 1, wherein: the gap distance between the waveguide lens and the protective sheet is less than or equal to 0.2mm.
6. The AR waveguide lens structure according to claim 1, wherein: the supporting glue and the pouring sealant are UV glue or resin glue.
7. An AR waveguide lens structure according to claim 3, wherein: the width of the air hole is less than or equal to 0.3mm.
8. The AR waveguide lens structure according to claim 1, wherein: the waveguide lens and the protective sheet are made of resin.
9. The AR waveguide lens structure according to any one of claims 1-8, wherein: the protective sheets are two, the waveguide lens is positioned between the two protective sheets, and the supporting glue and the pouring sealant are respectively arranged between the waveguide lens and the two protective sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223532565.3U CN219456634U (en) | 2022-12-29 | 2022-12-29 | AR waveguide lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223532565.3U CN219456634U (en) | 2022-12-29 | 2022-12-29 | AR waveguide lens structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219456634U true CN219456634U (en) | 2023-08-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223532565.3U Active CN219456634U (en) | 2022-12-29 | 2022-12-29 | AR waveguide lens structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219456634U (en) |
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2022
- 2022-12-29 CN CN202223532565.3U patent/CN219456634U/en active Active
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