Optical machine

Abstract

The invention discloses an optical machine, and relates to the technical field of intelligent wearable equipment, the optical machine comprises a main body, a lens, a light emitting assembly and a second adhesive layer, the main body is provided with a first opening and a second opening, and the lens is installed in the first opening; the light-emitting assembly comprises a light-emitting panel, a first adhesive layer and a reinforcing plate which are sequentially stacked along the optical axis of the lens, and the two sides of the first adhesive layer are bonded with the light-emitting panel and the reinforcing plate respectively; the reinforcing plate is bonded with the main body through the second adhesive layer, and the reinforcing plate covers the second opening. The optical machine has the advantage of being capable of reducing the risk of thermal imaginary focus.

Description

Technical Field

[0001] This application relates to the field of smart wearable device technology, and in particular to an optical engine. Background Technology

[0002] During the use of an optical engine, a large amount of heat is generated. When the heat cannot be dissipated in time, thermal defocusing will occur. Summary of the Invention

[0003] The main purpose of this application is to propose an optical engine that aims to at least improve the technical problem of thermal defocusing during the use of the optical engine.

[0004] To achieve the above objectives, according to some embodiments of this application, this application provides an optical engine, including a main body, wherein the main body is provided with a first opening and a second opening. The lens is mounted in the first opening; The light-emitting component includes a light-emitting panel, a first adhesive layer, and a reinforcing plate that are sequentially stacked along the optical axis of the lens, wherein the two sides of the first adhesive layer are respectively bonded to the light-emitting panel and the reinforcing plate; The second adhesive layer is used to bond the reinforcing plate to the main body, and the reinforcing plate covers the second opening.

[0005] In some embodiments, the first adhesive layer includes a thermally conductive adhesive layer and an offset adhesive layer disposed on the outer periphery of the thermally conductive adhesive layer. The two sides of the offset adhesive layer are respectively bonded to the light-emitting panel and the reinforcing plate, and the two sides of the thermally conductive adhesive layer are respectively attached to the light-emitting panel and the reinforcing plate.

[0006] In some embodiments, a gap is provided between the thermally conductive adhesive layer and the offset adhesive layer; or, the outer edge of the thermally conductive adhesive layer and the inner edge of the offset adhesive layer are connected.

[0007] In some embodiments, the reinforcing plate is provided with an adhesive groove, and the second adhesive layer is at least partially disposed within the adhesive groove.

[0008] In some embodiments, the adhesive groove includes a first sub-groove and a second sub-groove, the second sub-groove being disposed around the outer periphery of the first sub-groove, the thermally conductive adhesive layer being disposed in the first sub-groove, the offset adhesive layer being disposed in the second sub-groove, and the first sub-groove and the second sub-groove having different depths; or, a gap is provided between the first sub-groove and the second sub-groove.

[0009] In some embodiments, the second sub-slot is a trapezoidal slot, which includes a top surface and a bottom surface arranged along the optical axis. In a cross-section perpendicular to the optical axis, the cross-sectional area of ​​the trapezoidal slot gradually increases from the top surface to the bottom surface.

[0010] In some embodiments, the main body includes a housing and a cubic prism mounted on the housing, the housing being provided with the first opening and the second opening; The reinforcing plate is bonded to the outer shell via a second adhesive layer; or... The reinforcing plate is bonded to the cubic prism via a second adhesive layer.

[0011] In some embodiments, the lens includes a lens barrel and a plurality of lenses disposed within the lens barrel, the plurality of lenses being arranged sequentially along the optical axis, the lens barrel being mounted on the first opening, the lens barrel being provided with a receiving groove, the receiving groove being provided with a third adhesive layer, the third adhesive layer being in contact with the plurality of lenses.

[0012] In some embodiments, the receiving groove is a trapezoidal groove, and in a cross section perpendicular to the optical axis, the cross-sectional area of ​​the receiving groove on the side closer to the lens is greater than the cross-sectional area of ​​the receiving groove on the side farther from the lens.

[0013] In some embodiments, the number of receiving slots is at least two, each of the receiving slots extending along the axial direction of the lens barrel, and the at least two receiving slots are evenly spaced apart in the circumferential direction of the lens barrel.

[0014] In some embodiments, the lens includes a lens barrel and multiple lenses disposed within the lens barrel, the multiple lenses being arranged sequentially along the optical axis, the lens barrel being installed at the first opening, the lens barrel being a metal barrel, and the thermal expansion coefficient of the lens barrel being less than the thermal expansion coefficient of the lenses.

[0015] In the above solution, the optical engine includes a main body, a lens, a light-emitting component, and a second adhesive layer. The main body has a first opening and a second opening, and the lens is mounted in the first opening. The light-emitting component includes a light-emitting panel, a first adhesive layer, and a reinforcing plate stacked sequentially along the optical axis of the lens. The two sides of the first adhesive layer are bonded to the light-emitting panel and the reinforcing plate, respectively. The reinforcing plate is bonded to the main body through the second adhesive layer, and the reinforcing plate covers the second opening. This optical engine has the advantage of reducing the risk of thermal defocusing.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the optical engine of some embodiments of this application; Figure 2 This is an exploded structural diagram of the optical engine of some embodiments of this application; Figure 3 This is a schematic diagram of the structure of the optical engine of some embodiments of this application from one perspective; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction; Figure 5 This is a schematic diagram of the structure of the light-emitting component of the optical engine in some embodiments of this application; Figure 6 This is a cross-sectional structural schematic diagram of the light-emitting component of an optomechanism according to some embodiments of this application; Figure 7 This is a schematic diagram of the structure of the reinforcing plate of the optical engine in some embodiments of this application; Figure 8 This is a schematic diagram of the lens structure of an optical engine according to some embodiments of this application; Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure in the BB direction; Figure 10 for Figure 8 A schematic diagram of the cross-sectional structure in the CC direction.

[0019] Explanation of icon numbers: 100. Optical engine; 1. Main body; 12. Second opening; 13. Outer shell; 14. Cubic prism; 2. Lens; 21. Lens lens; 22. Lens barrel; 221. Receiving groove; 2211. First surface; 2212. Second surface; 3. Light-emitting component; 31. Light-emitting panel; 32. First adhesive layer; 321. Offset adhesive layer; 322. Thermally conductive adhesive layer; 33. Reinforcing plate; 4. Second adhesive layer; 5. Adhesive groove; 51. First sub-groove; 52. Second sub-groove; 6. Third adhesive layer.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, it should be considered that such a combination does not exist and is not within the scope of protection claimed in this application. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0026] The descriptions of directions such as "up", "down", "front", "back", "left", and "right" in this application are based on the directions shown in the accompanying drawings and are only used to explain the relative positional relationships between the components in the posture shown in the figures. If the specific posture changes, the directional indication will also change accordingly.

[0027] With the emergence of the metaverse concept, smart wearable devices such as AR (Augmented Reality) and VR (Virtual Reality) have experienced rapid development in recent years as important interface devices for the metaverse. As user demands increase, the miniaturization and functional diversification of optical engines have gradually become key performance parameters. However, the miniaturization and functional diversification of optical engines have also brought about some problems.

[0028] For example, for AR or VR optical engine products that use micro LEDs (micro light-emitting diodes) as the light source, in order to obtain the best imaging effect, it is usually necessary to calibrate the micro LEDs and fix them with adhesive during the optical engine assembly process.

[0029] The applicant found that even with precise calibration during assembly and confirmation of clear image quality, low image quality was unavoidable during actual use.

[0030] In response, the applicant, after careful investigation, discovered that a significant factor contributing to the low image quality was the excessive heat generated by the optical engine during operation, leading to thermal defocusing. Furthermore, with the miniaturization and functional diversification of optical engines, the heat dissipation area has decreased while the number of heat-generating components has increased, exacerbating this phenomenon. Specifically, the optical engine generates heat during operation, causing the adhesive to expand and deviate from its initial optimal imaging position, resulting in thermal defocusing and reduced image quality. Even more regrettably, the heat generated by the light-emitting components varies depending on the projected image, meaning the amount of adhesive expansion is not constant, making it impossible to resolve this issue through pre-setting compensation.

[0031] To at least alleviate this problem, the applicant, after careful research, provides an optical engine comprising a main body, a lens, a light-emitting component, and a second adhesive layer. The main body has a first opening and a second opening, with the lens mounted in the first opening. The light-emitting component includes a light-emitting panel, a first adhesive layer, and a reinforcing plate stacked sequentially along the optical axis of the lens. The first adhesive layer is bonded to the light-emitting panel and the reinforcing plate on both sides, respectively. The reinforcing plate is bonded to the main body via the second adhesive layer and covers the second opening. This optical engine has the advantage of reducing the risk of thermal defocusing.

[0032] Reference Figures 2 to 5 According to some embodiments of this application, this application provides an optical engine 100, including a main body 1, a lens 2, a light-emitting component 3, and a second adhesive layer 4. The main body 1 is provided with a first opening and a second opening 12, and the lens 2 is installed in the first opening. The light-emitting component 3 includes a light-emitting panel 31, a first adhesive layer 32, and a reinforcing plate 33, which are stacked sequentially along the optical axis of the lens 2. The two sides of the first adhesive layer 32 are respectively bonded to the light-emitting panel 31 and the reinforcing plate 33. The reinforcing plate 33 is bonded to the main body 1 through the second adhesive layer 4, and the reinforcing plate 33 covers the second opening 12.

[0033] The main body 1 refers to the main part of the optical engine 100. Specifically, the main body 1 may include a housing 13 and a cubic prism 14 disposed on the housing 13. The cube is also commonly referred to as an Xcube. The lens 2 refers to the part of the optical engine 100 that emits light. The lens 2 is mounted on the first opening, which is equivalent to the light exit port. The second opening 12 is equivalent to the light entrance port. (Refer to...) Figure 1 and Figure 2 There can be three second openings 12, each with a light-emitting component 3. The first opening faces one side of the cubic prism 14, and the other three second openings 12 face the other three sides of the cubic prism 14. The optical axis refers to the optical axis of the lens 2. The light-emitting component 3 includes a light-emitting panel 31, a first adhesive layer 32, and a reinforcing plate 33. The light-emitting panel 31 is equipped with a light source, which can be a micro LED light source. It emits light through the first opening toward the cubic prism 14 inside the main body 1 and finally exits from the lens 2. The first adhesive layer 32 and the second adhesive layer 4 both serve an adhesive function. The reinforcing plate 33 is bonded to the main body 1 through the second adhesive layer 4 and covers the second opening 12. The light-emitting panel 31 and the reinforcing plate 33 are bonded together through the first adhesive layer 32, and the side of the light-emitting panel 31 facing away from the reinforcing plate 33 is set as a gap. That is, the side of the light-emitting panel 31 facing away from the reinforcing plate 33 does not contact the main body 1 or the components inside the main body 1, but has a certain distance between them.

[0034] After the optical engine 100 generates heat, the second adhesive layer 4 will heat up and expand, that is, its volume will increase. When the second adhesive layer 4 heats up and expands, due to the large mass of the main body 1, the heat and expansion of the second adhesive layer 4 will cause the reinforcing plate 33 to move away from the main body 1. Since the light-emitting panel 31 is connected to the reinforcing plate 33, the light-emitting panel 31 will also move away from the lens 2. This will cause the back focus to shift, resulting in thermal defocusing and low image quality. In this application's technical solution, the reinforcing plate 33 and the light-emitting panel 31 are bonded together by a first adhesive layer 32. The first adhesive layer 32 expands when heated. The reinforcing plate 33 and the light-emitting panel 31 are connected to opposite sides of the first adhesive layer 32. Since the reinforcing plate 33 is bonded to the main body 1 by a second adhesive layer 4, and there is a gap on the side of the light-emitting panel 31 facing away from the reinforcing plate 33 (i.e., no obstruction), the expansion of the first adhesive layer 32 causes the light-emitting panel 31 to move relative to the side facing the lens 2. This can mitigate or even counteract the back focus shift caused by the expansion of the second adhesive layer 4, thus reducing the risk of thermal defocusing. It should be noted that in this application, the back focus refers to the distance between the light-emitting surface of the light-emitting panel 31 and the corresponding light-incident surface of the cubic prism 14. The light-emitting surface of the light-emitting panel 31 faces the cubic prism 14, and the light-incident surface of the cubic prism 14 refers to the side of the cubic prism 14 facing the light-emitting panel 31. This embodiment has the advantage of reducing the risk of thermal defocusing and can improve image quality.

[0035] In some embodiments, the first adhesive layer 32 includes a thermally conductive adhesive layer 322 and an offset adhesive layer 321 disposed on the outer periphery of the thermally conductive adhesive layer 322. The two sides of the offset adhesive layer 321 are bonded to the light-emitting panel 31 and the reinforcing plate 33, respectively. The two sides of the thermally conductive adhesive layer 322 are respectively attached to the light-emitting panel 31 and the reinforcing plate 33. The first adhesive layer 32 can be entirely composed of the offset adhesive layer 321, or a thermally conductive adhesive layer 322 can be additionally provided. Regarding the materials of the offset adhesive layer 321 and the thermally conductive adhesive layer 322, the thermally conductive adhesive layer 322 can be made of one or more of thermally conductive gel, thermally conductive silicone, thermally conductive pads, or thermally conductive grease. The offset adhesive layer 321 can be made of UV adhesive, UV-curable adhesive, or epoxy resin adhesive.

[0036] Since the light-emitting panel 31 is the main component that generates heat, the heat dissipation requirements of the optical engine 100 need to be considered, that is, to dissipate heat as quickly as possible, thereby reducing the risk of thermal defocusing from the source of heat dissipation. Therefore, the first adhesive layer 32 can also include a thermally conductive adhesive layer 322. The thermally conductive adhesive layer 322 has a high thermal conductivity and has a good heat conduction effect. The two sides of the thermally conductive adhesive layer 322 are respectively attached to the light-emitting panel 31 and the reinforcing plate 33. In this way, the heat emitted by the light-emitting panel 31 can be transferred to the reinforcing plate 33 through the thermally conductive adhesive layer 322, and then dissipated into the atmosphere. The offset adhesive layer 321 primarily serves an adhesive function, connecting the light-emitting panel 31. To ensure the light-emitting panel 31 remains in a translational state during the heating process of the first adhesive layer 32, the offset adhesive layer 321 can be positioned outside the thermally conductive adhesive layer 322 and bonded to the outer edge of the light-emitting panel 31. This allows the offset adhesive layer 321 to simultaneously push the light-emitting panel 31 from various positions on its outer edge, resulting in translational movement and reducing the risk of the incident light from the optical engine 100 deviating from the optical axis. Since the expansion of the offset adhesive layer 321 after heating is not significant, when the optical engine 100 is not in use, the two sides of the offset adhesive layer 321 can be bonded to the light-emitting panel 31 and the reinforcing plate 33 respectively, in a surface-to-surface bonding manner. This allows the light-emitting panel 31 to react quickly to the expansion of the offset adhesive layer 321, moving towards the lens 2 in a timely manner to compensate for the back focus shift caused by the expansion of the second adhesive layer 4, thereby reducing thermal defocusing.

[0037] In some embodiments, a gap is provided between the thermally conductive adhesive layer 322 and the offset adhesive layer 321. This gap ensures that the heating and expansion of the two layers are independent, reducing the complexity of the thermal expansion changes of the offset adhesive layer 321 and simplifying prediction. Furthermore, the gap facilitates the manufacturing process; for example, it reduces the risk of adhesive dripping or flowing onto the thermally conductive adhesive layer 322 during the dispensing of the offset adhesive layer 321.

[0038] In another embodiment, the outer edge of the thermally conductive adhesive layer 322 and the inner edge of the offset adhesive layer 321 are connected. That is, there is no gap or a very small gap between the thermally conductive adhesive layer 322 and the offset adhesive layer 321. This allows full utilization of the surface area of ​​the light-emitting panel 31, enabling the first adhesive layer 32 to contact the light-emitting panel 31. If the area of ​​the thermally conductive adhesive layer 322 can be made larger, the heat generated by the light-emitting panel 31 can be transferred to the reinforcing plate 33 more quickly, improving heat dissipation efficiency. Alternatively, the offset adhesive layer 321 can be made larger, making its adjustment of thermal defocusing more accurate and sensitive. Of course, connecting the inner edges of the thermally conductive adhesive layer 322 and the offset adhesive layer 321 also has another effect: some of the heat absorbed by the thermally conductive adhesive layer 322 from the light-emitting panel 31 will be transferred to the offset adhesive layer 321, thus improving the sensitivity and adjustment range of the offset adhesive layer 321.

[0039] In some embodiments, the reinforcing plate 33 is provided with an adhesive groove 5, and the second adhesive layer 4 is at least partially disposed within the adhesive groove 5. The adhesive groove 5 can be provided within the reinforcing plate 33, and the second adhesive layer 4 can be disposed within the adhesive groove 5, which facilitates the positioning and assembly of the second adhesive layer 4. Of course, the adhesive groove 5 is located on the side of the reinforcing plate 33 facing the light-emitting panel 31. In other embodiments, the adhesive groove 5 can also be provided on the side of the light-emitting panel 31 facing the reinforcing plate 33.

[0040] In some embodiments, the adhesive groove 5 includes a first sub-groove 51 and a second sub-groove 52, the second sub-groove 52 is arranged around the outer periphery of the first sub-groove 51, the thermally conductive adhesive layer 322 is disposed in the first sub-groove 51, the offset adhesive layer 321 is disposed in the second sub-groove 52, and the depths of the first sub-groove 51 and the second sub-groove 52 are different; or, a gap is provided between the first sub-groove 51 and the second sub-groove 52.

[0041] In this embodiment, separate sub-grooves are provided for the thermally conductive adhesive layer 322 and the offset adhesive layer 321. Specifically, the adhesive groove 5 includes a first sub-grooves 51 and a second sub-grooves 52. The thermally conductive adhesive layer 322 is disposed in the first sub-grooves 51, and the offset adhesive layer 321 is disposed in the second sub-grooves 52. The first sub-grooves 51 and the second sub-grooves 52 have different depths. The greater the depth, the greater the thickness of the corresponding adhesive layer that can be accommodated. The first sub-grooves 51 can be made deeper, which can increase the contact area between the thermally conductive adhesive layer 322 and the reinforcing plate 33, thereby improving heat dissipation efficiency. Alternatively, the depth of the second sub-groove 52 can be increased, resulting in a larger amount of offset adhesive layer 321, greater expansion and deformation when heated, and a wider and more sensitive adjustment range. In other embodiments, there can be a gap between the first sub-groove 51 and the second sub-groove 52, that is, the first sub-groove 51 and the second sub-groove 52 are set alternately. In this way, the offset adhesive layer 321 and the thermally conductive adhesive layer 322 do not interfere with each other, and it can also facilitate the manufacturing process, such as reducing the risk of adhesive dripping or flowing into the thermally conductive adhesive layer 322 during the dispensing of the offset adhesive layer 321.

[0042] In some embodiments, the second sub-slot 52 is a trapezoidal slot, which includes a top surface and a bottom surface arranged along the optical axis. In a cross-section perpendicular to the optical axis, the cross-sectional area of ​​the trapezoidal slot gradually increases from the top surface to the bottom surface.

[0043] The second sub-slot 52 is a variable diameter structure, which can be a trapezoidal slot or a conical slot. The bottom surface is a surface with a larger cross-sectional area, and the top surface is a surface with a smaller cross-sectional area. The bottom surface is set close to the light-emitting panel 31. In this way, the cross-sectional shape of the offset adhesive layer 321 set in the second sub-slot 52 is also trapezoidal, which will give the light-emitting panel 31 a force towards the lens 2, making it easier for the offset adhesive layer 321 to drive the light-emitting panel 31 to move towards the lens 2 after being heated.

[0044] In some embodiments, the main body 1 includes a housing 13 and a cubic prism 14 mounted on the housing 13. The housing 13 is provided with a first opening and a second opening 12. The reinforcing plate 33 is bonded to the housing 13 via a second adhesive layer 4. In other embodiments, the reinforcing plate 33 is bonded to the cubic prism 14 via the second adhesive layer 4. The reinforcing plate 33 can be bonded to the cubic prism 14 via the second adhesive layer 4, or it can be bonded to the housing 13 via the second adhesive layer 4. Those skilled in the art can design it according to actual needs.

[0045] In some embodiments, the lens 2 includes a lens barrel 22 and multiple lenses 21 disposed within the lens barrel 22. The multiple lenses 21 are arranged sequentially along the optical axis. The lens barrel 22 is installed at a first opening. A receiving groove 221 is provided on the lens barrel 22. A third adhesive layer 6 is provided in the receiving groove 221. The third adhesive layer 6 abuts against the multiple lenses 21 respectively.

[0046] Lens 2 is generally composed of multiple lens elements 21 arranged sequentially along the optical axis. During manufacturing, the lens elements 21 are typically clipped onto or bonded to the lens barrel 22, which is usually a plastic tube. The coefficient of thermal expansion of the plastic tube is greater than that of the lens elements 21. Therefore, when heated, the deformation of the plastic tube will be greater than that of the lens elements 21, causing the connection between the lens barrel 22 and the lens elements 21 to loosen, and the position of the lens elements 21 to easily shift. Furthermore, because different locations experience different amounts of heat, the deformation of different locations in the lens barrel 22 is not uniform, and the deformation of each lens element 21 may also be different, leading to changes in the relative positions of the lens elements 21 and affecting the imaging effect. In the embodiments of this application, a third adhesive layer 6 is provided to abut against the multiple lens elements 21. When heated and expanding, the third adhesive layer 6 will press the lens elements 21 together, reducing the risk of the lens elements 21 loosening and causing positional changes.

[0047] In some embodiments, the receiving groove 221 is a trapezoidal groove, and in a cross section perpendicular to the optical axis, the cross-sectional area of ​​the receiving groove 221 on the side closer to the lens 21 is greater than the cross-sectional area of ​​the receiving groove 221 on the side farther away from the lens 21.

[0048] The receiving groove 221 is a variable-diameter structure, which can be a trapezoidal groove or a conical groove. The side with the larger cross-sectional area, i.e., the second surface 2212, abuts against the lens 21, while the side with the smaller cross-sectional area, i.e., the first surface 2211, is positioned away from the lens 21. Thus, according to force analysis, a force pointing towards the center of the lens 21 is applied to the lens 21, i.e., a radial force. If there are multiple third adhesive layers 6, and their distribution is uniform, a force pointing towards the center of the lens 21 can be applied simultaneously from multiple directions, reducing the risk of lens 21 shifting.

[0049] In some embodiments, there are at least two receiving grooves 221, each extending along the axial direction of the lens barrel 22, and the at least two receiving grooves 221 are evenly spaced apart in the circumferential direction of the lens barrel 22. The extension direction of each adhesive groove 5 is along the axial direction of the lens barrel 22, which can also be described as the length direction of the lens barrel 22, and is also the direction of the optical axis. This allows the third adhesive layer 6 disposed in the receiving groove 221 to abut against each lens 21. Furthermore, the multiple receiving grooves 221 and their even distribution in the circumferential direction of the lens barrel 22 ensure that the lens 21 is subjected to uniform force in all directions, reducing the risk of lens 21 displacement.

[0050] In some embodiments, the lens 2 includes a lens barrel 22 and multiple lens elements 21 disposed within the lens barrel 22. The multiple lens elements 21 are arranged sequentially along the optical axis. The lens barrel 22 is mounted at a first opening. The lens barrel 22 is a metal barrel, and its coefficient of thermal expansion is less than that of the lens elements 21. In this embodiment, the lens barrel 22 is made of a metal component, specifically copper or aluminum. Since the coefficient of thermal expansion of the metal component is less than that of the lens elements 21, the expansion deformation of the metal barrel is smaller than that of the lens elements 21. This also allows the lens elements 21 to be held firmly in place even when the temperature rises, reducing the risk of lens element 21 displacement.

[0051] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An optical engine, characterized by, The application relates to a camera lens. The camera lens comprises a main body, a lens barrel, a light-emitting assembly and a second adhesive layer. The main body is provided with a first opening and a second opening. The lens barrel is arranged in the first opening. The light-emitting assembly comprises a light-emitting panel, a first adhesive layer and a reinforcing plate which are arranged in sequence along an optical axis of the lens barrel.

2. The optical engine of claim 1, wherein The two sides of the first adhesive layer are respectively bonded to the light-emitting panel and the reinforcing plate.

3. The optical engine of claim 2, wherein, The reinforcing plate is bonded to the main body through the second adhesive layer, and the reinforcing plate covers the second opening.

4. The optical engine of claim 2, wherein, The first adhesive layer comprises a heat-conducting adhesive layer and a deviation adhesive layer arranged at the periphery of the heat-conducting adhesive layer.

5. The optical engine of claim 4, wherein, The two sides of the deviation adhesive layer are respectively bonded to the light-emitting panel and the reinforcing plate. The two sides of the heat-conducting adhesive layer are respectively arranged in close contact with the light-emitting panel and the reinforcing plate. A gap is arranged between the heat-conducting adhesive layer and the deviation adhesive layer.

6. The optical engine of claim 5, wherein, The outer edge of the heat-conducting adhesive layer is connected to the inner edge of the deviation adhesive layer.

7. The optical engine according to any one of claims 1 to 6, wherein, The reinforcing plate is provided with a glue groove, and the second adhesive layer is at least partially arranged in the glue groove. The glue groove comprises a first sub-groove and a second sub-groove. The second sub-groove is annularly arranged at the periphery of the first sub-groove. The heat-conducting adhesive layer is arranged in the first sub-groove.

8. The optical engine of claim 7, wherein, The deviation adhesive layer is arranged in the second sub-groove.

9. The optical engine of claim 8, wherein, The depths of the first sub-groove and the second sub-groove are different.

10. The optical engine of claim 7, wherein, A gap is arranged between the first sub-groove and the second sub-groove.

11. The optical engine according to any one of claims 1 to 6, wherein, The second sub-groove is a trapezoidal groove. The trapezoidal groove comprises a top surface and a bottom surface arranged along the optical axis. In a cross section perpendicular to the optical axis, the cross-sectional area of the trapezoidal groove gradually increases from the top surface to the bottom surface. The main body comprises a shell and a cubic prism arranged in the shell. The shell is provided with the first opening and the second opening. The reinforcing plate is bonded to the shell through the second adhesive layer. The lens barrel comprises a lens barrel and a plurality of lenses arranged in the lens barrel. The plurality of lenses are arranged in sequence along the optical axis. The lens barrel is arranged in the first opening. The lens barrel is a metal barrel. The thermal expansion coefficient of the lens barrel is smaller than the thermal expansion coefficient of the lenses.

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