CN215375900U - Split type camera lens and camera module - Google Patents

Abstract

The application discloses split type camera lens and module of making a video recording. The split type lens comprises a first lens part and a second lens part which are sequentially arranged along an optical axis, the first lens part comprises a first lens group, the first lens group comprises a first lens and a second lens, the first lens comprises a first optical area used for imaging and a first structural area surrounding the first optical area, the second lens comprises a second optical area used for imaging and a second structural area surrounding the second optical area, the first structural area and the second structural area are mutually matched, the second lens part comprises a second lens barrel and a second lens group contained in the second lens barrel, and the first lens part is arranged on the second lens barrel. According to the split-type lens, the first lens and the second lens in the first lens group are positioned in a fitting mode, so that the eccentricity between the first lens and the second lens is favorably reduced, and the imaging quality of the split-type lens is improved; and secondly, the first lens and the second lens are connected in a fitting mode, so that the distance between the first lens and the second lens is favorably reduced, and the overall height of the lens is favorably reduced.

Description

Split type camera lens and camera module

Technical Field

The application relates to the technical field of lenses, in particular to a split type lens and a camera module.

Background

With the improvement of living standards, consumers have higher and higher requirements for the camera function of terminal devices such as mobile phones and tablet phones, and not only are the aberrations such as astigmatism, curvature of field, distortion, etc. low required for the lens, but also the specification parameters such as the field angle, aperture, light transmittance, etc. are required, and the lens height (referred to as total optical length TTL) is also increased while the lens parameters are improved and the lens imaging is improved, but the device thickness is also an important parameter for the terminal devices such as mobile phones.

How to control the height of the lens while improving the lens parameters and improving the lens imaging is an important subject of research and development of various manufacturers at present, wherein, increasing the refractive index of the lens and adopting a glass lens is one of the feasible schemes at present. The glass lens is produced through molding process, which includes setting pre-molded glass body inside mold with precise machining and molding, heating to temperature between the glass converting temperature and the softening point in proper environment, deforming glass with the mold core surface, cooling, eliminating pressure, separating mold and taking out the product. However, the molding process has a large defect, the surface accuracy of the glass lens is difficult to control, so that the lens has large eccentricity, the mold is easy to wear, the mold needs to be maintained for many times, and the cost is high.

SUMMERY OF THE UTILITY MODEL

For solving prior art's not enough, an aim at of this application provides a split type camera lens and has this split type camera lens's the module of making a video recording, is favorable to improving the formation of image quality.

Another object of the present application is to provide a split type lens and a camera module having the same, which are beneficial to reducing the height of the lens.

In order to achieve the above object, the present application provides a split type lens, including a first lens part and a second lens part arranged in sequence along an optical axis, the first lens part includes a first lens group, the first lens group includes a first lens and a second lens, the first lens includes a first optical area for imaging and a first structural area surrounding the first optical area, the second lens includes a second optical area for imaging and a second structural area surrounding the second optical area, the first structural area and the second structural area are mutually engaged, the second lens part includes a second lens barrel and a second lens group accommodated in the second lens barrel, and the first lens part is disposed on the second lens barrel.

Preferably, at least one of the first lens and the second lens is a glass lens.

Preferably, the first lens and the second lens are both glass lenses.

Preferably, the glass lens is obtained by cutting a wafer, the wafer comprises a plurality of optical zones arranged in an array, each optical zone is spaced from the other optical zone, the area of the wafer except the optical zones is a non-optical zone, and the wafer is suitable for cutting in the non-optical zone to separate the optical zones, so as to obtain a plurality of glass lenses.

Preferably, an adhesive is arranged between the second structural area and the first structural area to bond the first lens and the second lens.

Preferably, the structural area of the first lens is subjected to a black plating treatment, and the structural area of the second lens is subjected to a black plating treatment.

Preferably, the refractive indexes of the first lens and the second lens are not equal.

Preferably, the refractive index of the first lens and/or the second lens is larger than 1.6, and the abbe number of the first lens and/or the second lens is larger than 56.

Preferably, the refractive index of the first lens and/or the second lens is larger than 1.8.

Preferably, the distance between the optical axes of the first lens and the second lens is less than 3 μm.

Preferably, the first lens is bonded to the second lens barrel, a side of the first structure region opposite to the second lens barrel has a bonding surface, the roughness of the bonding surface is greater than the roughness of a surface of the first optical region and greater than the roughness of a non-bonding region of the first structure region, and the roughness of the bonding surface is 0.006 μm to 0.015 μm.

Preferably, the first lens part further includes a first lens barrel surrounding the first lens group, the first lens barrel is bonded to the second lens barrel through an adhesive, and the first lens group is connected to or not connected to the first lens barrel.

Preferably, the first lens part further includes a first lens barrel for accommodating the first lens group, the first lens group is connected to the first lens barrel, the first lens barrel is bonded to the second lens barrel by an adhesive, and a ratio of a coefficient of thermal expansion of the first lens barrel to a coefficient of thermal expansion of the glass lens is less than or equal to 300%.

Preferably, the first lens barrel is made of metal, or the first lens barrel is made of plastic added with mineral fiber or glass fiber, or the first lens barrel is made of polycarbonate added with carbon fiber.

The application also provides a camera module, including aforementioned optical lens, supporter and sensitization subassembly, optical lens passes through the supporter keeps on sensitization subassembly advances light path.

Compared with the prior art, the method has the following beneficial effects: according to the split-type lens, the first lens and the second lens in the first lens group are positioned in a fitting mode, so that the eccentricity between the first lens and the second lens is favorably reduced, and the imaging quality of the split-type lens is improved; and secondly, the first lens and the second lens are connected in a fitting mode, so that the distance between the first lens and the second lens is favorably reduced, and the overall height of the lens is favorably reduced.

Other technical features and advantages of the present application will be described in detail in the detailed description of the embodiments.

Drawings

FIG. 1 is a schematic view of one embodiment of a wafer of the present application;

FIG. 2 shows a pressing mold of WLG wafer level glass technology and a flat glass disposed in the pressing mold;

FIG. 3 shows a press module pressing a first surface and a second surface of a flat glass into a predetermined shape;

FIG. 4 is a schematic view of a first embodiment of a split lens of the present application;

FIG. 5 is a schematic view of an embodiment of a first lens group of the present application;

FIG. 6 is a schematic view of a second embodiment of a split lens of the present application;

fig. 7 is a schematic view of an embodiment of a camera module according to the present application;

in the figure:

100. split type camera lens

1. A first lens component; 11. a first barrel; 12. a first lens group; 121. a first lens; 1211. optical area one; 1212. A first structural area; 1213. bonding surface; 122. a second lens; 1221. a second optical zone; 1222. a second structural region;

2. a second lens component; 21. a second barrel; 22. a second lens group;

3. a wafer; 31. an optical zone; 32. a non-optical zone;

4. a flat glass; 41. a first surface; 42. a second surface;

5. pressing a mould; 51. an upper die; 52. a lower die;

200. a support member; 300. a photosensitive assembly; 301. a circuit board; 302. a photosensitive chip; 303. a support; 304. a filter element.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 4 to 7, the present application provides a split lens 100 including a first lens part 1 and a second lens part 2 arranged in sequence along an optical axis. The first lens part 1 comprises a first lens group 12, the first lens group 12 comprises a first lens 121 and a second lens 122, the first lens 121 comprises a first optical area 1211 for imaging and a first structural area 1212 surrounding the first optical area 1211, the second lens 122 comprises a second optical area 1221 for imaging and a second structural area 1222 surrounding the second optical area 1221, the first structural area 1212 and the second structural area 1222 are matched with each other, the second lens part 2 comprises a second lens barrel 21 and a second lens group 22 accommodated in the second lens barrel 21, and the first lens part 1 is arranged on the second lens barrel 21.

In the present application, the first lens 121 and the second lens 122 in the first lens group 12 are positioned in a fitting manner, which is beneficial to reducing the eccentricity between the two, and is further beneficial to improving the imaging quality of the split-type lens 100; secondly, the first lens 121 and the second lens 122 are connected in a fitting manner, which is beneficial to reducing the distance between the two lenses, and is further beneficial to reducing the overall height of the split-type lens 100.

In some embodiments, an adhesive (not shown) is disposed between the second engaging structure area 1222 and the first engaging structure area 1212 to adhesively fix the first lens 121 and the second lens 122.

Preferably, at least one of the first lens 121 and the second lens 122 is a glass lens. The glass lens has the advantages that the refractive index of the lens and the light transmittance of the lens are improved, and the height of the lens is controlled while the parameters of the lens are improved.

In a preferred embodiment, the first lens 121 and the second lens 122 are glass lenses, and the two glass lenses are engaged, which is beneficial to further reducing the height of the lens.

The refractive indexes of the first lens 121 and the second lens 122 may be the same or different. Preferably, the refractive indexes of the first lens 121 and the second lens 122 are not equal, so that the degree of freedom of the optical design of the lens is improved.

In some embodiments, the refractive index of the first lens 121 and/or the second lens 122 is greater than 1.6, and the abbe number of the first lens 121 and/or the second lens 122 is greater than 56. When the refractive indexes of the first lens 121 and the second lens 122 are both larger than 1.6, and the abbe numbers of the first lens 121 and the second lens 122 are larger than 56, the optical total length of the lens can be reduced by about 20%, and the optical total length of the lens can be reduced by 1-2 mm to the maximum extent. Further preferably, the refractive index of the first lens 121 and/or the second lens 122 is greater than 1.8.

In some embodiments, the glass lens is cut from a wafer 3, as shown in fig. 1, the wafer 3 includes a plurality of optical zones 31 arranged in an array, each optical zone 31 is spaced apart from another optical zone 31, an area of the wafer 3 other than the optical zones 31 is a non-optical zone 32, and the wafer 3 is adapted to be cut in the non-optical zone 32 to separate the optical zones 31, so as to obtain a plurality of wafer-level glass lenses. The wafer-level glass lens with higher surface precision and lower cost is adopted to replace a molded glass lens, so that the production cost of the lens is reduced, and the imaging quality of the lens is improved.

Because the first lens 121 and the second lens 122 both adopt wafer-level glass lenses with high surface precision, the distance between the optical axes after the first lens 121 and the second lens 122 are combined is less than 3 μm, or the eccentricity between the first lens 121 and the second lens 122 is less than 3 μm. Further preferably, the decentration between the first lens 121 and the second lens 122 is less than 2 μm.

Because the wafer-level glass lens is obtained by cutting the wafer 3, the shape accuracy of the wafer-level glass lens is affected by the cutting accuracy, and the concentricity between the center of the optical area of the lens and the center of the structural area of the lens is poor, i.e. the wafer-level glass lens has a relatively large eccentricity problem. In order to reduce the influence of the eccentricity of the lens on the imaging quality, the split type lens is adopted in the application, so that the first lens part 1 and the second lens part 2 can be assembled and fixed in an active calibration mode without depending on the edge shape of the wafer-level glass lens for positioning, and the poor imaging quality caused by the eccentricity of the wafer-level glass lens can be avoided.

It is worth mentioning that "active calibration" means: the positions of the first lens component 1 and the second lens component 2 are determined by making the integral imaging of the first lens component 1 and the second lens component 2 meet the requirements. A method of assembling a first lens part 1 and a second lens part 2 in an active calibration mode is exemplarily described below, which comprises the following steps:

pre-positioning: arranging the first lens component 1, the second lens component 2 and the photosensitive assembly in sequence along an optical axis, so that the first lens component 1 and the second lens component 2 form an imaging optical system;

active calibration: the method comprises the steps that a photosensitive assembly is electrified to obtain an image formed by an optical system consisting of a first lens component 1 and a second lens component 2, imaging quality and an adjustment amount of the imaging quality are calculated through image algorithms such as SFR and MTF, the relative position between the first lens component 1 and the second lens component 2 is actively adjusted in real time in at least one direction of a six-axis direction according to the adjustment amount, and the imaging quality (including optical parameters such as peak value, curvature of field and astigmatism) reaches a target value after one or more times of adjustment, wherein the six-axis direction refers to an X-axis direction, a Y-axis direction and a Z-axis direction which are perpendicular to each other, and an RX (X-axis) direction, a RY (Y-axis) direction and an RZ (Z-axis) direction which rotate around the X-axis, the Y-axis and the Z-axis respectively;

fixedly connecting: curing the adhesive between the first lens component 1 and the second lens component 2 thereby fixing the first lens component 1 and the second lens component 2 in the position determined by the active calibration.

It should be noted that before the fixing step, a step of laying adhesive is further included, which may be performed before the active calibration or after the active calibration is completed, and if the step is performed after the active calibration is completed, it is necessary to remove one of the lens components and lay adhesive on the other lens component after the calibration is completed. The adhesive can be UV thermosetting adhesive, UV adhesive or thermosetting adhesive.

When the split type lens is assembled in an active calibration mode, the manufacturing tolerance of each lens component can be compensated by adjusting the relative position of each lens component, so that the imaging quality of the lens meets the requirement. It is worth mentioning that due to the characteristics of the active calibration process, a certain included angle is formed between the optical axes of the first lens part 1 and the second lens part 2 in the assembled split-type lens, and the included angle is about 0-1 °.

The wafer 3 can be manufactured by a WLG wafer level glass technology, the wafer 3 is manufactured by the WLG wafer level glass technology, a glass lens with high surface precision can be obtained, and the process has small loss to a mold. A method of manufacturing a wafer level glass lens by WLG wafer level glass technology is exemplarily described below, which comprises the following steps:

s1, providing a plane glass 4 and a pressing mold 5, the plane glass 4 having a first surface 41 and a second surface 42, the pressing mold 5 including an upper mold 51 and a lower mold 52, as shown in fig. 2;

s2, pressing the first surface 41 and the second surface 42 of the flat glass 4 into a predetermined shape by using the pressing mold 5, as shown in fig. 3, obtaining a wafer 3 having a plurality of optical zones 31;

s3, the wafer 3 is diced to obtain a plurality of wafer level glass lenses.

The wafer level glass lens manufactured by the WLG wafer level glass technology has high surface shape precision, and because the wafer level glass lens can be produced in batch, the production efficiency of the lens is higher, and the loss of the process to the pressing mould 5 is smaller.

The method between the step S2 and the step S3 can further comprise a film coating step: the first surface 41 and/or the second surface 42 are coated with a film, which may be one or more of an antireflection film, a light filter film, a protective film, and the like. Due to the characteristics of the WLG wafer level glass technology, the coating process of the wafer level glass lens can be simplified, and the wafer level glass lens can be directly realized on the wafer 3 in batches. In other words, the wafer level glass lens may have one or more of an anti-reflection film, a filter film, a protection film, and the like.

The step between the step S2 and the step S3 may further include a black plating step: and (3) plating black on a non-optical area 32 of the wafer 3 except for the optical area 31 to endow the wafer-level glass lens with the function of reducing stray light. Similarly, due to the characteristics of the WLG wafer level glass technology, the blackening process of the wafer level glass lens can also be simplified, and can be directly realized on the wafer 3 in batch. In other words, the wafer-level glass lens is subjected to a blackening treatment on the non-optical area (or the structural area).

The method for cutting the wafer 3 in step S3 may be, but is not limited to, sawing, laser cutting, laser grinding, water jet cutting, milling, micro machining, micro-slicing, punching and cutting, etc. The shape of the wafer-level glass lens obtained after the wafer 3 is cut may be a square or a circle, which is not limited in this application.

After the first lens 121 and the second lens 122 are obtained by cutting the corresponding wafer 3, the first lens 121 and the second lens 122 are engaged. For example, in the example of the method for manufacturing a wafer-level glass lens by the WLG wafer-level glass technology in the present application, the step S2 and the step S3 may include the following steps: obtaining two wafers 3, wherein the optical areas 31 of the two wafers 3 can be the same or different in shape, and the non-optical areas 32 of the two wafers 3 are suitable for fitting with each other in shape; two wafers 3 are stacked such that the non-optical areas 32 of the two wafers 3 fit each other. After the two wafers 3 are fitted, a dicing step is performed to obtain a plurality of first lenses 121 and a plurality of second lenses 122 fitted to each other. Further, before stacking the two wafers 3, an adhesive layer may be provided between the non-optical regions 32 of the two wafers 3, and the two wafers 3 may be further fixed by the adhesive layer.

In some embodiments, as shown in fig. 4, the first lens group 12 is bonded to the second lens barrel 21, the first lens component 1 further includes a first lens barrel 11 disposed around the first lens group 12, the first lens barrel 11 is bonded to the second lens barrel 21, the first lens barrel 11 mainly plays a role of protecting the first lens group 12, and the first lens group 12 and the first lens barrel 11 may be connected or not connected. If the first lens barrel 11 is not connected to the first lens group 12, during active calibration, the first lens group 12 and the second lens part 2 are actively calibrated, and after the first lens group 12 and the second lens barrel 21 are bonded and fixed, the first lens barrel 11 is bonded to the second lens barrel 21.

Further, the first lens 121 is adhered to the second barrel 21. As shown in fig. 5, the first structural area 1212 of the first lens barrel 121 has a bonding surface 1213 on a side opposite to the second lens barrel 21, where Ra of the bonding surface 1213 is 0.006 μm to 0.015 μm, the roughness of the bonding surface 1213 is greater than that of the first optical area 1211 and is also greater than that of the non-bonding area of the first structural area 1212, and an adhesive is disposed between the bonding surface 1213 and the second lens barrel 21, so that the first lens barrel 121 and the second lens barrel 21 are bonded together by the adhesive. The rough surface with certain roughness is arranged on the structural area of the first lens 121, so that the bonding force between the first lens 121 and the second lens barrel 21 can be improved, the connection stability of the first lens 121 and the second lens barrel 21 is further improved, the glass lens is particularly suitable for being bonded on the surface of a plastic material, the difference between the Coefficient of Thermal Expansion (CTE) of the common plastic material of the glass material and the lens barrel (the first lens barrel or the second lens barrel) is large, even if a material with relatively smaller CTE is adopted as a lens barrel material, the CTE is still larger compared with the glass lens, so that the bonding force is relatively poor, and the glass lens is easy to fall off in high temperature or high and low temperature changes.

Compared with the glass lens prepared by the molding technology, the size of the structural area of the wafer-level glass lens prepared by cutting the wafer is larger, and the manufacturing of the bonding surface is more facilitated. Specifically, the width of the structural area of the glass lens prepared by the molding process is generally 0.3 mm-0.6 mm, while the width of the structural area of the wafer-level glass lens prepared by the WLG wafer-level glass technology can be more than 0.6mm and less than 1.5mm, and such a width provides a sufficient manufacturing space for the bonding surface.

In some embodiments, the surfaces of both sides of the first structured area 1212 of the first lens 121 are roughened, so as to meet the bonding requirements of both sides of the first lens 121.

In some embodiments, the first structural region 1212 of the first lens 121 and/or the second structural region 1222 of the second lens 122 are blackened (not shown). It will be understood by those skilled in the art that the blackening treatment may be a blackening film on the structure region, or may be a process of attaching a light-shielding material to the structure region, or may be other processes known in the art.

In other embodiments, as shown in fig. 6, the first lens component 1 includes a first barrel 11 for accommodating the first lens group 12, that is, the first lens group 12 is mounted on the first barrel 11, and the first barrel 11 is bonded to the second barrel 21, that is, the first lens component 1 and the second lens component 2 are fixedly connected by an adhesive disposed between the first barrel 11 and the second barrel 21.

The first lens 121 and the second lens 122 in the first lens group 12 are made of glass, and the conventional lens barrel is generally made of plastic, and the coefficients of thermal expansion of glass and plastic are different, and if the glass lens is installed in the conventional plastic lens barrel, the deformation amount of the glass lens is much smaller than that of the plastic lens barrel under a high-temperature and high-pressure environment, which may cause the relative position of the glass lens and the plastic lens barrel to shift, and even the glass lens may be cracked in the process of resisting temperature change. Based on this, the first barrel 11 is made of a material having a thermal expansion coefficient similar to that of the glass lens, in some preferred embodiments, a ratio of the thermal expansion coefficient of the first barrel 11 to that of the glass lens is less than or equal to 300%, and the first barrel 11 may be made of a metal material, or the first barrel 11 may be made of a plastic material added with mineral fiber or glass fiber.

In one embodiment, the first barrel 11 is made of polycarbonate with carbon fibers added, wherein the mass fraction of the carbon fibers is 30%, the thermal expansion coefficient of the material is 38-42, which is substantially close to that of glass, and the material has good mold release performance and flame retardant performance, and the density is 1.3-1.5 g/cm³The heat-shrinkable film has a shrinkage of 0.25 to 0.45%, a bending strength of 80 to 100MPa, a bending modulus of 4800 to 5200MPa, a heat distortion temperature of 120 to 140 ℃ and a high flexibility and excellent impact properties.

In some embodiments, the first lens group 12 may also include other lenses (not shown) besides the first lens 121 and the second lens 122, and the other lenses may or may not be wafer-level glass lenses.

It should be noted that the first lens part 1 or the second lens part 2 may further include a light shielding member (not shown in the figure) for reducing stray light, and the light shielding member is configured as a means commonly used in the art, and the detailed description of the present application is omitted.

The present application further provides a camera module, which includes the aforementioned optical lens 100, support 200 and photosensitive element 300, wherein the optical lens 100 is held on the light path of the photosensitive element 300 through the support 200. The supporter 200 may be a lens holder for supporting only the optical lens 100, or may be a motor capable of driving the optical lens 100 to perform auto-focusing, zooming, or anti-shake. The photosensitive assembly 300 includes a circuit board assembly and a filter assembly, the circuit board assembly includes a circuit board 301, a photosensitive chip 302 electrically connected to the circuit board 301, and 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 on the light path of the photosensitive chip 302 through the bracket 303, the bracket 303 is fixed on the circuit board 301, and the photosensitive assembly 300 is fixed with the support 200 through the bracket 303.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (15)

1. A split type camera lens which characterized in that: the first lens part comprises a first lens group and a second lens group, the first lens group comprises a first lens and a second lens, the first lens comprises a first optical area for imaging and a first structural area surrounding the first optical area, the second lens comprises a second optical area for imaging and a second structural area surrounding the second optical area, the first structural area and the second structural area are mutually matched, the second lens part comprises a second lens barrel and a second lens group accommodated in the second lens barrel, and the first lens part is arranged on the second lens barrel.

2. A split-type lens according to claim 1, wherein at least one of the first lens and the second lens is a glass lens.

3. The split-type lens according to claim 2, wherein the first lens and the second lens are both glass lenses.

4. The split-type lens according to claim 2, wherein refractive indices of the first lens and the second lens are not equal.

5. A split lens according to claim 2, wherein the refractive index of the first lens and/or the second lens is greater than 1.6, and the abbe number of the first lens and/or the second lens is greater than 56.

6. A split lens according to claim 5, wherein the refractive index of the first lens and/or the second lens is greater than 1.8.

7. A split lens according to any one of claims 2 to 6, wherein the glass lens is cut from a wafer, the wafer comprises a plurality of optical zones arranged in an array, the optical zones are spaced apart from each other, the wafer is a non-optical zone except the optical zones, and the wafer is adapted to be cut in the non-optical zone to separate the optical zones, so as to obtain a plurality of glass lenses.

8. A split-type lens according to any one of claims 1 to 6, wherein an adhesive is provided between the second structural region and the first structural region to bond the first lens and the second lens.

9. A split-type lens according to any one of claims 1 to 6, wherein the first structure region of the first lens is subjected to a blackening treatment, and the second structure region of the second lens is subjected to a blackening treatment.

10. A split lens according to any one of claims 1 to 6, wherein a distance between optical axes of the first lens and the second lens is less than 3 μm.

11. The lens barrel according to any one of claims 1 to 6, wherein the first lens is bonded to the second lens barrel, and a side of the first structure region opposite to the second lens barrel has a bonding surface having a roughness greater than a roughness of a surface of the first optical region and greater than a roughness of a non-bonding region of the first structure region, and the roughness of the bonding surface is 0.006 μm to 0.015 μm.

12. The split lens of claim 11, wherein the first lens part further includes a first lens barrel surrounding the first lens group, the first lens barrel is bonded to the second lens barrel by an adhesive, and the first lens group is connected to or disconnected from the first lens barrel.

13. The split lens according to any one of claims 2 to 6, wherein the first lens part further includes a first barrel for accommodating the first lens group, the first lens group is connected to the first barrel, the first barrel is bonded to the second barrel by an adhesive, and a ratio of a coefficient of thermal expansion of the first barrel to a coefficient of thermal expansion of the glass lens is 300% or less.

14. The split-type lens according to claim 13, wherein the first barrel is made of metal, or made of plastic with mineral fiber or glass fiber added, or made of polycarbonate with carbon fiber added.

15. A camera module, comprising the lens assembly of any one of claims 1 to 14, a support member and a photosensitive assembly, wherein the lens assembly is held on the light path of the photosensitive assembly by the support member.

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