Optical lens and camera module

Abstract

The application discloses an optical lens and a camera module. The optical lens comprises a lens barrel and a lens group arranged in the lens barrel. The lens group comprises a first lens and a second lens arranged in sequence from an object side to an image side. The first lens and the second lens are both glass lenses. The first lens comprises a first optical area for imaging and a first structure area surrounding the first optical area. The second lens comprises a second optical area for imaging and a second structure area surrounding the second optical area. The first structure area and the second structure area are mutually engaged. The engagement of the first lens and the second lens is conducive to reducing the eccentricity between the two, thereby improving the imaging quality of the optical lens. The engagement of the first lens and the second lens is also conducive to reducing the distance between the two, thereby reducing the overall height of the optical lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lenses, in particular to an optical lens and a camera module. BACKGROUND

[0002] With the improvement of living standards, consumers have higher and higher requirements for the camera function of terminal devices such as mobile phones and tablets. Not only are low aberrations such as astigmatism, field curvature, distortion, and the like required for the lens, but specifications such as the field of view, aperture, and light transmittance of the lens are also required. While improving the parameters of the lens and the imaging of the lens, the height (optical total length TTL) of the lens also increases. However, for mobile phones and other terminals, the thickness of the device is also an important parameter.

[0003] How to control the height of the lens while improving the parameters of the lens and the imaging of the lens is an important research topic for manufacturers at present. Among them, increasing the refractive index of the lens and using a glass lens are one of the currently feasible solutions. The glass lens is generally made by molding technology. The main use is to take advantage of the characteristic that the viscosity of glass decreases as the temperature rises. The glass preform that has been initially formed is placed in a precisely processed mold. In a suitable environment, the temperature is raised to between the glass transition temperature and the softening point. The glass is deformed by applying pressure to the mold surface, and the shape of the mold is transformed. After cooling, the pressure is removed, the mold is separated, and the finished product is taken out. However, the molding process has a major defect. The surface accuracy of the glass lens is difficult to control, resulting in a large eccentricity between lenses. In addition, the mold is easily damaged and needs to be repaired multiple times, which is costly. SUMMARY

[0004] One purpose of the present application is to provide an optical lens and a camera module having the optical lens, which is beneficial to improve the imaging quality.

[0005] Another purpose of the present application is an optical lens and a camera module having the optical lens, which is beneficial to reduce the height of the lens.

[0006] To achieve the above purposes, the present application provides an optical lens, comprising a lens barrel and a lens group arranged in the lens barrel, the lens group comprising a first lens and a second lens arranged in sequence from an object side to an image side, the first lens and the second lens are both glass lenses, the first lens comprises a first optical area for imaging and a first structure area surrounding the first optical area, the second lens comprises a second optical area for imaging and a second structure area surrounding the second optical area, and the first structure area and the second structure area are mutually engaged.

[0007] Further, the refractive indices of the first lens and the second lens are not equal.

[0008] Further, the first lens and / or the second lens has a refractive index greater than 1.6, and an Abbe number greater than 56.

[0009] Further, the first lens and / or the second lens has a refractive index greater than 1.8.

[0010] Further, the distance between the optical axis of the first lens and the optical axis of the second lens is less than 3 μm.

[0011] Further, the glass lens is obtained by cutting a wafer, the wafer comprising a plurality of optical zones arranged in an array, each of the optical zones being spaced apart from each other, a region of the wafer other than the optical zones being a non-optical zone, the wafer being adapted to be cut at the non-optical zone to separate the plurality of optical zones, thereby obtaining the plurality of glass lenses.

[0012] Further, the first lens and the second lens are bonded by an adhesive provided between the first structure zone and the second structure zone.

[0013] Further, the optical axis of the first lens does not coincide with the central axis of the first structure zone, and / or the optical axis of the second lens does not coincide with the central axis of the second structure zone.

[0014] Further, a gap exists between the peripheral side surface of the first lens and / or the second lens and the lens barrel, the width of the gap being 10 μm to 50 μm.

[0015] Further, the first lens and the second lens form a cemented lens group, the cemented lens group being fixedly connected to the lens barrel by an adhesive, the first structure zone and / or the second structure zone being bonded to the lens barrel.

[0016] Further, only the peripheral side surface of the first structure zone is bonded to the lens barrel.

[0017] Further, the peripheral side surface of the second structure zone is bonded to the lens barrel.

[0018] Further, the peripheral side surface and / or the object side surface of the first structure zone has a first rough surface, the roughness Ra of the first rough surface being 0.006 μm to 0.015 μm, the roughness of the first rough surface being greater than the roughness of the first optical zone, an adhesive being provided between the first rough surface and the lens barrel to bond the first lens to the lens barrel; and / or the peripheral side surface of the second structure zone has a second rough surface, the roughness Ra of the second rough surface being 0.006 μm to 0.015 μm, the roughness of the second rough surface being greater than the roughness of the second optical zone, an adhesive being provided between the second rough surface and the lens barrel to bond the second lens to the lens barrel.

[0019] Further, the ratio of the coefficient of thermal expansion of the lens barrel to the coefficient of thermal expansion of the glass lens is less than or equal to 300%.

[0020] Further, the lens barrel is made of metal, or the lens barrel is made of plastic with mineral fibers or glass fibers, or the lens barrel is made of polycarbonate with carbon fibers.

[0021] The application also provides a camera module, comprising the optical lens, a support and a photosensitive component, wherein the optical lens is retained on the light path of the photosensitive component by the support.

[0022] Compared with the prior art, the application has the beneficial effects that the first lens and the second lens are made of glass lenses, and the main advantages are reflected in the improvement of the refractive index of the lenses and the transmittance of the lens; the mutual engagement of the first lens and the second lens is conducive to reducing the eccentricity between the two, thereby improving the imaging quality of the optical lens; the improvement of the refractive index of the first lens and the second lens can reduce the total optical length (TTL) of the optical lens, which is conducive to reducing the overall height of the optical lens and the camera module.

[0023] Other technical features and beneficial effects of the application will be described in detail in the specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of an embodiment of the wafer of the application;

[0025] Figure 2 It shows the pressing mold of the WLG wafer-level glass lens technology and the plane glass arranged in the pressing mold;

[0026] Figure 3 It shows that the first surface and the second surface of the plane glass are pressed into a predetermined shape by the pressing mold;

[0027] Figure 4 It is a schematic diagram of the first embodiment of the optical lens of the application;

[0028] Figure 5 It is a schematic diagram of the mutual engagement of the first lens and the second lens of the application;

[0029] Figure 6 It is a schematic diagram of an embodiment of the first lens of the application;

[0030] Figure 7 It is a schematic diagram of the second embodiment of the optical lens of the application;

[0031] Figure 8 It is a schematic diagram of the third embodiment of the optical lens of the application;

[0032] Figure 9 A schematic view of a fourth embodiment of the optical lens of the present application;

[0033] Figure 10 A schematic view of an embodiment of the camera module of the present application;

[0034] In the drawings:

[0035] 100, split lens

[0036] 1, lens barrel

[0037] 2, lens group; 21, first lens; 211, first optical area; 212, first structure area; 22, second lens; 221, second optical area; 222, second structure area

[0038] 3, wafer; 31, optical area; 32, non-optical area

[0039] 4, flat glass; 41, first surface; 42, second surface

[0040] 5, pressing mold; 51, upper mold; 52, lower mold

[0041] 200, support; 300, light sensing assembly; 301, circuit board; 302, light sensing chip; 303, bracket; 304, light filtering element DETAILED DESCRIPTION

[0042] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that, under the premise of no conflict, the following described embodiments or technical features can be combined in any manner to form new embodiments.

[0043] In the description of the present application, it should be noted that, for orientation words, such as terms “center”, “transverse”, “longitudinal”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0044] It should be noted that the terms “first”, “second” and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0045] The terms "comprise" and "have" and any variations thereof in the specification and claims of this application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that comprises a list of steps or units is not necessarily limited to those steps or units which are expressly listed, but can include other steps or units that are not expressly listed or inherent to such process, method, product or apparatus.

[0046] As shown in Figure 4 The present application provides an optical lens 100, comprising a lens barrel 1 and a lens group 2 arranged in the lens barrel 1, the lens group 2 comprising a first lens 21 and a second lens 22 arranged in sequence from an object side to an image side, the first lens 21 and the second lens 22 being glass lenses, as shown in Figure 5 The first lens 21 comprises a first optical area 211 for imaging and a first structure area 212 surrounding the first optical area 211, and the second lens 22 comprises a second optical area 221 for imaging and a second structure area 222 surrounding the second optical area 221, the first structure area 212 and the second structure area 222 are mutually engaged to connect the first lens 21 and the second lens 22, and to reduce the distance between the optical axis of the first optical area 211 of the first lens 21 and the optical axis of the second optical area 221 of the second lens 22, thereby improving the assembly precision between the first lens 21 and the second lens 22.

[0047] The first lens 21 and the second lens 22 of the present application are glass lenses, and the main advantages are reflected in the improvement of the refractive index of the lens and the transmittance of the lens; the mutual engagement of the first lens 21 and the second lens 22 is beneficial to reduce the eccentricity between them, thereby improving the imaging quality of the optical lens 100; the increase of the refractive index of the first lens 21 and the second lens 22 can reduce the total optical length (TTL) of the optical lens 100, which is beneficial to reduce the overall height of the optical lens 100 and the camera module.

[0048] The refractive index of the first lens 21 and the second lens 22 can be the same or different. Preferably, the refractive index of the first lens 21 and the second lens 22 is not equal, so that the degree of freedom of the optical design of the optical lens 100 is improved.

[0049] In some embodiments, the refractive index of the first lens 21 and the second lens 22 is greater than 1.6, and the Abbe number of the first lens 21 and the second lens 22 is greater than 56, so that the total optical length of the lens can be reduced by about 20%, and the maximum optical length can be reduced by 1-2mm. Further preferably, the refractive index of the first lens 21 and / or the second lens 22 is greater than 1.8.

[0050] In some embodiments, the glass lens of the present application is made by cutting a wafer 3, as shown in Figure 1As shown, the wafer 3 comprises a plurality of optical zones 31 arranged in an array, each optical zone 31 is spaced apart from each other, and the wafer 3 is adapted to be cut at the non-optical zones 32 to separate the plurality of optical zones 31, so as to obtain a plurality of wafer-level glass lenses. By using the wafer-level glass lenses with higher surface accuracy and lower cost instead of the molded glass lenses, the production cost of the lens is reduced, and the imaging quality of the lens is improved.

[0051] Since the first lens 21 and the second lens 22 are both made of wafer-level glass lenses with high surface accuracy, the distance between the optical axes of the two lenses is less than 3 μm, or in other words, the eccentricity of the first lens 21 and the second lens 22 is less than 3 μm. Further preferably, the eccentricity of the first lens 21 and the second lens 22 is less than 2 μm.

[0052] The wafer 3 can be made by WLG wafer-level glass lens technology. By using the WLG wafer-level glass lens technology to manufacture the wafer 3, the glass lenses with high surface accuracy can be obtained, and the loss of the mold is small. Hereinafter, a method for manufacturing wafer-level glass lenses by WLG wafer-level glass lens technology is exemplarily introduced, which comprises the following steps:

[0053] S1, providing a planar glass 4 and a pressing mold 5, the planar glass 4 has a first surface 41 and a second surface 42, and the pressing mold 5 comprises an upper mold 51 and a lower mold 52, as shown in Figure 2 ;

[0054] S2, using the pressing mold 5 to press the first surface 41 and the second surface 42 of the planar glass 4 into a predetermined shape, as shown in Figure 3 , so as to obtain the wafer 3 with a plurality of optical zones 31;

[0055] S3, cutting the wafer 3 to obtain a plurality of wafer-level glass lenses.

[0056] The wafer-level glass lenses manufactured by the WLG wafer-level glass lens technology have high surface accuracy, and since the lenses can be mass-produced, the production efficiency of the lenses is also higher, and the loss of the pressing mold 5 is small.

[0057] Between the step S2 and the step S3, a film coating step can also be included: coating a film on the first surface 41 and / or the second surface 42, and the film layer can be one or more of an anti-reflection film, a filter film, a protective film, etc. Due to the characteristics of the WLG wafer-level glass lens technology, the film coating process of the wafer-level glass lenses can be simplified, and can be directly realized in batches on the wafer 3. In other words, the wafer-level glass lenses can have one or more of an anti-reflection film, a filter film, a protective film, etc.

[0058] A black plating step may also be included between steps S2 and S3: black plating is applied to the non-optical region 32 of wafer 3, excluding the optical region 31, to impart the function of reducing stray light to the wafer-level glass lens. Similarly, due to the characteristics of WLG wafer-level glass lens technology, the black plating process for wafer-level glass lenses can be simplified and can be directly mass-produced on wafer 3. In other words, the non-optical region (or structural region) of the wafer-level glass lens has a black plating layer.

[0059] The method for cutting wafer 3 in step S3 can be, but is not limited to, sawing, laser cutting, laser grinding, water jet cutting, milling, micromachining, microslicing, punching, etc. The shape of the wafer-level glass lens obtained after cutting wafer 3 can be square or circular, and this application does not limit it. Preferably, the shape of the wafer-level glass lens obtained after cutting wafer 3 is circular to adapt to the existing lens barrel structure.

[0060] After obtaining the first lens 21 and the second lens 22 by dicing the corresponding wafers 3, the first lens 21 and the second lens 22 can be laminated together. Alternatively, the two wafers 3 can be laminated together before dicing, and then diced to obtain the laminated first lens 21 and the second lens 22. For example, in the example of the method for manufacturing wafer-level glass lenses using the WLG wafer-level glass lens technology described above in this application, the steps between steps S2 and S3 may include: obtaining two wafers 3, the shapes of the optical regions 31 of the two wafers 3 may be the same or different, and the shapes of the non-optical regions 32 of the two wafers 3 are suitable for mutual lamination; stacking the two wafers 3 so that the non-optical regions 32 of the two wafers 3 are mutually laminationd. After the two wafers 3 are laminated, the dicing step is performed to obtain multiple mutually laminationd first lenses 21 and second lenses 22. Further, before stacking the two wafers 3, an adhesive layer can be provided between the non-optical regions 32 of the two wafers 3 to further fix the two wafers 3.

[0061] In some embodiments, an adhesive is provided between the first structural region 212 of the first lens 21 and the second structural region 222 of the second lens 22 to bond the first lens 21 to the second lens 22.

[0062] In some embodiments, such as Figure 6 As shown, the optical axis of the first lens 21 ( Figure 6 The solid line in the middle) and the central axis of its first structural region 212 ( Figure 6 The dotted lines in the diagram do not coincide, and / or the optical axis of the second lens 22 does not coincide with the central axis of its second structural region 222. This is mainly because wafer-level glass lenses are obtained by cutting wafers 3, and their shape accuracy is affected by the cutting accuracy, resulting in a difference in concentricity between the center of the optical region of the lens and the center of the structural region of the lens.

[0063] In conventional lens assembly, the optical axis of the lens can be well aligned with the central axis of its structural area, as the lens can be positioned using the edge shape of the structural area. However, in this application, since the optical axes of the first lens 21 and / or the second lens 22 do not coincide with the central axis of their structural areas, and the edge shapes of different batches of the first lens 21 or the second lens 22 may differ, it is difficult to position the lens using its edge shape.

[0064] To accommodate most of the first lens 21 and the second lens 22, this application appropriately enlarges the inner diameter of the portion of the lens barrel 1 where the first lens 21 and the second lens 22 are mounted, resulting in a gap between the peripheral side of the first lens 21 and / or the second lens 22 and the lens barrel 1. In some preferred embodiments, the width of the gap between the peripheral side of the first lens 21 and / or the second lens 22 and the lens barrel 1 is 10 μm to 50 μm. An adhesive may be used to fill the gap between the peripheral side of the first lens 21 and / or the second lens 22 and the lens barrel 1. It is worth noting that the peripheral side of the lens refers to the surface that connects the object side and the image side of the lens structure area and is annular around the lens.

[0065] In some embodiments, the first lens 21 and the second lens 22 are connected and fixed to the lens barrel 1 by an adhesive to ensure that the positions of the first lens 21 and the second lens 22 and the lens barrel 1 are precisely fixed, thereby improving the optical axis alignment between the combined lens group and other lenses in the lens barrel 1.

[0066] In some embodiments, the connection between the lens assembly and the lens barrel 1 is achieved by bonding the first structural region 212 of the first lens 21 to the lens barrel 1. Figure 7 In the embodiment shown, both the peripheral side and the object side of the first structural region 212 are bonded to the lens barrel 1. In such a case... Figure 8 In the illustrated embodiment, only the peripheral side of the first structural region 212 is bonded to the lens barrel 1. Considering that applying adhesive between the object side of the first structural region 212 and the lens barrel 1 may cause the first lens 21 to tilt in the lens barrel 1, it is preferable not to apply adhesive between the object side of the first structural region 212 and the lens barrel 1.

[0067] In other embodiments, the connection between the lens assembly and the lens barrel 1 is achieved by bonding the second structural region 222 of the second lens 22 to the lens barrel 1. Specifically, the peripheral side surface of the second structural region 222 is bonded to the lens barrel 1, such as... Figure 9 As shown.

[0068] It is worth mentioning that the bonding of the glass lens and the plastic lens barrel can have the following problems: the difference between the coefficients of thermal expansion (CTE) of the glass and the plastic is large, even if the material with relatively small CTE is used as the material of the lens barrel, the CTE of the lens barrel is still larger than that of the glass lens, which leads to the glass lens being easily detached at high temperature or when the temperature changes.

[0069] To solve the problem that the glass lens is easily detached at high temperature or when the temperature changes, the roughness of the glass lens can be increased to improve the bonding force between the lens and the lens barrel 1. In some embodiments, the first structure area 212 has a first rough surface on the peripheral side surface and / or the object side surface, the roughness Ra of the first rough surface is 0.006 μm to 0.015 μm, and the roughness of the first rough surface is larger than the roughness of the first optical area 211. The first lens 21 is bonded to the lens barrel 1 by setting glue on the first rough surface. In other embodiments, the second structure area 222 has a second rough surface on the peripheral side surface, the roughness Ra of the second rough surface is 0.006 μm to 0.015 μm, and the roughness of the second rough surface is larger than the roughness of the second optical area 221. The second lens 22 is bonded to the lens barrel 1 by setting glue on the second rough surface.

[0070] In addition, the bonding of the glass lens and the plastic lens barrel can also have the following problems: the difference between the coefficients of thermal expansion (CTE) of the glass and the plastic is large, and in a high-temperature and high-pressure environment, the deformation amount of the glass lens is much smaller than that of the plastic lens barrel, which can cause the relative position of the glass lens and the plastic lens barrel to deviate, and even the glass lens can be broken during the process of resisting temperature changes.

[0071] To reduce the possibility of displacement or breakage of the glass lens, the lens barrel 1 is made of a material with a coefficient of thermal expansion similar to that of the glass lens. In some embodiments, the ratio of the coefficient of thermal expansion of the lens barrel 1 to the coefficient of thermal expansion of the glass lens is less than or equal to 300%. The material of the lens barrel 1 can be a metal material, or the material of the lens barrel 1 is a plastic material added with mineral fibers or glass fibers.

[0072] In one embodiment, the material of the lens barrel 1 is polycarbonate added with carbon fibers, and the mass fraction of the carbon fibers is 30%. The coefficient of thermal expansion of this material is 38 to 42, which is basically close to the coefficient of thermal expansion of glass. In addition, this material has good demolding performance and flame retardant performance, the density is 1.3 to 1.5 g / cm 3 , the shrinkage rate is 0.25 to 0.45%, the bending strength is 80 to 100 MPa, the bending modulus is 4800 to 5200 MPa, and the heat distortion temperature is 120 to 140°C. It has high bending resistance and excellent crash performance.

[0073] In some embodiments, the lens group 2 is further provided with at least one lens on the image side of the second lens 22. These lenses may or may not be glass lenses. When these lenses are glass lenses, especially when they are glass lenses made using WLG wafer-level glass lens technology, the lenses are adapted to engage with the second structural region 222 of the second lens 22 through the structural region to reduce the eccentricity between the lenses.

[0074] In some embodiments, the first lens 21 is the first lens on the object side of the lens group 2.

[0075] In some embodiments, the first structural region 212 of the first lens 21 and / or the second structural region 222 of the second lens 22 have a black coating, which helps to reduce stray light.

[0076] This application also provides a camera module, such as Figure 10 As shown, it includes the aforementioned optical lens 100, support member 200, and photosensitive assembly 300. The optical lens 100 is held in the light-in-spot path of the photosensitive assembly 300 by the support member 200. The support member 200 can be a lens mount used only to support the optical lens 100, or it can be a motor that can drive the optical lens 100 to perform autofocus, zoom, or image stabilization. The photosensitive assembly 300 includes a circuit board assembly and a filter assembly. The circuit board assembly includes a circuit board 301 and a photosensitive chip 302 electrically connected to the circuit board 301, as well as electronic components such as capacitors and resistors. The filter assembly includes a bracket 303 and a filter element 304 fixed on the bracket 303. The filter element 304 is held in the light-in-spot path of the photosensitive chip 302 by the bracket 303. The bracket 303 is fixed to the circuit board 301, and the photosensitive assembly 300 is fixed to the support member 200 by the bracket 303.

[0077] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An optical lens characterized in that, The lens assembly includes a lens barrel and a lens group disposed within the lens barrel. The lens group includes a first lens and a second lens arranged sequentially from the object side to the image side. The first lens is the first lens on the object side of the lens group. Both the first and second lenses are glass lenses, which are made by cutting wafers. Two wafers are laminated and then cut to obtain the laminated first and second lenses. The distance between the optical axes of the first and second lenses is less than 3 μm. The first lens includes a first optical region for imaging and a first structural region surrounding the first optical region. The second lens includes a second optical region for imaging and a second structural region surrounding the second optical region. The first and second structural regions are laminated to each other. There is a gap between the peripheral surface of the first and / or second lenses and the lens barrel, with a gap width of 10 μm to 50 μm. The laminated lens group consisting of the first and second lenses is connected and fixed to the lens barrel by an adhesive. The first and / or second structural regions are bonded to the lens barrel, but no adhesive is provided between the object side of the first structural region and the lens barrel. The first structural region is bonded to the lens barrel only on its peripheral side, or the second structural region is bonded to the lens barrel on its peripheral side. The lens assembly further includes at least one lens on the image side of the second lens, wherein at least one lens is not a glass lens.

2. The optical lens of claim 1, wherein, The refractive indices of the first lens and the second lens are not equal.

3. The optical lens of claim 1, wherein, The first lens and / or the second lens have a refractive index greater than 1.6 and an Abbe number greater than 56.

4. The optical lens of claim 3, wherein, The refractive index of the first lens and / or the second lens is greater than 1.

8.

5. The optical lens of any of claims 1-4, wherein, The glass lens is obtained by dicing a wafer. The wafer includes a plurality of optical regions arranged in an array, with each optical region spaced apart from the others. The area of ​​the wafer other than the optical regions is a non-optical region. The wafer is adapted to be diced in the non-optical region to separate the plurality of optical regions, thereby obtaining a plurality of glass lenses.

6. The optical lens of any of claims 1-4, wherein, An adhesive is provided between the first structural region and the second structural region to bond the first lens and the second lens together.

7. The optical lens of any of claims 1-4, wherein, The optical axis of the first lens does not coincide with the central axis of the first structural region, and / or the optical axis of the second lens does not coincide with the central axis of the second structural region.

8. The optical lens of claim 1, wherein, The first structural region has a first rough surface on its peripheral side and / or object side. The roughness Ra of the first rough surface is 0.006μm to 0.015μm. The roughness of the first rough surface is greater than that of the first optical region. An adhesive is provided between the first rough surface and the lens barrel to bond the first lens to the lens barrel. And / or, the peripheral side surface of the second structural region has a second rough surface, the roughness Ra of the second rough surface is 0.006μm~0.015μm, the roughness of the second rough surface is greater than the roughness of the second optical region, and an adhesive is provided between the second rough surface and the lens barrel to bond the second lens to the lens barrel.

9. The optical lens of claim 8, wherein, The ratio of the thermal expansion coefficient of the lens barrel to the thermal expansion coefficient of the glass lens is less than or equal to 300%.

10. The optical lens of claim 9, wherein, The material of the lens barrel is metal, or the material of the lens barrel is plastic added with mineral fibers or glass fibers, or the material of the lens barrel is polycarbonate added with carbon fibers.

11. A camera module characterized by The optical lens as claimed in any one of claims 1-10, the support, and a photosensitive assembly, wherein the optical lens is held on the light path of the photosensitive assembly by the support.

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