Split lens and camera module
By using a split lens design and active calibration technology, the problems of lens eccentricity and increased lens height were solved, achieving high image quality and low-cost lens manufacturing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO SUNNY OPOTECH CO LTD
- Filing Date
- 2021-05-31
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, it is difficult to control the surface precision of glass lenses, molds are easily damaged, resulting in large lens eccentricity, high cost, and increased lens height, making it difficult to control lens thickness while improving lens parameters and image quality.
The lens adopts a split lens design, positioning lens one and lens two through a snap-fit method and adjusting their relative positions through active calibration. It uses wafer-grade glass lenses and metal or low expansion coefficient material lens barrels, which are fixed with adhesives to reduce lens eccentricity and lens height.
It improves the image quality of the lens, reduces lens eccentricity, lowers the lens height and production cost, and enhances the lens's overall optical length control capability.
Smart Images
Figure CN115421269B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of lens technology, and in particular to a split lens and a camera module. Background Technology
[0002] As living standards improve, consumers have increasingly higher requirements for the camera functions of mobile phones, tablets and other terminal devices. They not only require low aberrations such as astigmatism, field curvature and distortion, but also have requirements for lens specifications such as field of view, aperture and light transmittance. While improving lens parameters and improving lens imaging, the lens height (referring to the total optical length TTL) also increases. However, for mobile phones and other terminals, the device thickness is also an important parameter.
[0003] How to control lens height while improving lens parameters and image quality is a key research topic for manufacturers. Increasing the refractive index and using glass lenses is one feasible solution. Currently, glass lenses are generally manufactured using molding technology. This technology utilizes the property that glass viscosity decreases with increasing temperature. A pre-formed glass body is placed in a precision-machined mold. Under suitable atmospheric conditions, the temperature is raised to between the glass transition temperature and its softening point. Pressure is applied to the mold core surface to deform the glass, shaping the mold core. After cooling, the pressure is removed, the mold is separated, and the finished product is extracted. However, molding has significant drawbacks. The surface precision of the glass lens is difficult to control, resulting in significant eccentricity between lenses. Furthermore, the molds are prone to wear and tear, requiring frequent repairs and incurring high costs. Summary of the Invention
[0004] To address the shortcomings of existing technologies, one objective of this application is to provide a split-type lens and a camera module having the split-type lens, which is beneficial for improving image quality.
[0005] Another objective of this application is to provide a split-type lens and a camera module having the split-type lens, which is beneficial for reducing the height of the lens.
[0006] To achieve the above objectives, this application provides a split-type lens, including a first lens component and a second lens component arranged sequentially along the optical axis. The first lens component includes a first lens group, which includes a first lens and a second lens. The first lens includes an optical region for imaging and a structural region surrounding the first optical region. The second lens includes an optical region for imaging and a structural region surrounding the second optical region. The first structural region and the second structural region are mutually fitted. The second lens component includes a second lens barrel and a second lens group housed within the second lens barrel. The first lens component is disposed on the second lens barrel.
[0007] As a preferred embodiment, at least one of the first lens and the second lens is a glass lens.
[0008] As a preferred embodiment, both lens one and lens two are glass lenses.
[0009] As a preferred embodiment, the glass lens is obtained by dicing a wafer, the wafer comprising a plurality of optical regions arranged in an array, the optical regions being spaced apart from each other, and the area of the wafer other than the optical regions being 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.
[0010] As a preferred embodiment, an adhesive is provided between the second structural region and the first structural region to bond the first lens to the second lens.
[0011] As a preferred embodiment, the first structural region of the first lens is blackened, and the second structural region of the second lens is blackened.
[0012] As a preferred embodiment, the refractive indices of the first lens and the second lens are not equal.
[0013] As a preferred embodiment, 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.
[0014] As a preferred embodiment, the refractive index of both the first lens and / or the second lens is greater than 1.8.
[0015] As a preferred embodiment, the distance between the optical axes of the first lens and the second lens is less than 3 μm.
[0016] As a preferred embodiment, the first lens is bonded to the second lens barrel, and the side of the first structural region opposite to the second lens barrel has an adhesive surface. The roughness of the adhesive surface is greater than the roughness of the surface of the first optical region and also greater than the roughness of the non-bonded area of the first structural region. The roughness of the adhesive surface is 0.006μm to 0.015μm.
[0017] As a preferred embodiment, the first lens component further includes a first lens barrel surrounding the outside of the first lens group, the first lens barrel being bonded to the second lens barrel by an adhesive, and the first lens group being connected to or not connected to the first lens barrel.
[0018] As a preferred embodiment, the first lens component further includes a first lens barrel for accommodating the first lens group, the first lens group being connected to the first lens barrel, the first lens barrel being bonded to the second lens barrel by an adhesive, and the ratio of the coefficient of thermal expansion of the first lens barrel to the coefficient of thermal expansion of the glass lens being less than or equal to 300%.
[0019] As a preferred embodiment, the first lens barrel is made of metal, or the first lens barrel is made of plastic with added mineral fibers or glass fibers, or the first lens barrel is made of polycarbonate with added carbon fibers.
[0020] This application also provides a camera module, including the aforementioned optical lens, support member, and photosensitive component, wherein the optical lens is held in the light-gathering path of the photosensitive component by the support member.
[0021] Compared with the prior art, this application has the following advantages: This application positions lens one and lens two in the first lens group by means of interlocking, which helps to reduce the eccentricity between them and thus improve the imaging quality of the split lens; secondly, lens one and lens two are connected by means of interlocking, which helps to reduce the distance between them and thus helps to reduce the overall height of the lens.
[0022] Other technical features and beneficial effects of this application will be described in detail in the Specific Embodiments section. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of one embodiment of the wafer used in this application;
[0024] Figure 2 The image shows a pressing mold for WLG wafer-level glass technology and a flat glass disposed within the pressing mold.
[0025] Figure 3 The pressing module is shown pressing the first and second surfaces of a flat glass into a predetermined shape;
[0026] Figure 4 This is a schematic diagram of the first embodiment of the split lens of this application;
[0027] Figure 5 This is a schematic diagram of an embodiment of the first lens group of this application;
[0028] Figure 6 This is a schematic diagram of a second embodiment of the split lens of this application;
[0029] Figure 7 This is a schematic diagram of one embodiment of the camera module of this application;
[0030] In the picture:
[0031] 100. Split-type lens
[0032] 1. First lens component; 11. First lens barrel; 12. First lens group; 121. Lens 1; 1211. Optical area 1; 1212. Structural area 1; 1213. Bonding surface; 122. Lens 2; 1221. Optical area 2; 1222. Structural area 2;
[0033] 2. Second lens assembly; 21. Second lens barrel; 22. Second lens group;
[0034] 3. Wafer; 31. Optical area; 32. Non-optical area;
[0035] 4. Flat glass; 41. First surface; 42. Second surface;
[0036] 5. Pressing mold; 51. Upper mold; 52. Lower mold;
[0037] 200, Support component; 300, Photosensitive assembly; 301, Circuit board; 302, Photosensitive chip; 303, Bracket; 304, Filter element. Detailed Implementation
[0038] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0039] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.
[0040] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0041] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.
[0042] like Figure 4-7 As shown, this application provides a split-type lens 100, including a first lens component 1 and a second lens component 2 arranged sequentially along the optical axis. The first lens component 1 includes a first lens group 12, which includes a first lens 121 and a second lens 122. The first lens 121 includes an optical region 1211 for imaging and a structural region 1212 surrounding the optical region 1211. The second lens 122 includes an optical region 1221 for imaging and a structural region 1222 surrounding the optical region 1221. The structural regions 1212 and 1222 fit together. The second lens component 2 includes a second lens barrel 21 and a second lens group 22 housed within the second lens barrel 21. The first lens component 1 is disposed on the second lens barrel 21.
[0043] This application positions lens 121 and lens 22 in the first lens group 12 using a snap-fit method, which helps to reduce the eccentricity between them and thus improves the imaging quality of the split lens 100. Secondly, the snap-fit method connects lens 121 and lens 22, which helps to reduce the distance between them and thus helps to reduce the overall height of the split lens 100.
[0044] In some embodiments, an adhesive (not shown in the figure) is provided between the interlocking structural region 2 1222 and structural region 1212 to bond and fix lens 121 and lens 2 122.
[0045] Preferably, at least one of lens element 121 and lens element 122 is a glass lens. The advantages of using a glass lens are mainly reflected in its improvement of the lens's refractive index and light transmittance, which is beneficial for controlling the lens's height while improving lens parameters.
[0046] In a preferred embodiment, both lens 121 and lens 122 are glass lenses, and the two glass lenses are joined together, which helps to further reduce the height of the lens.
[0047] The refractive indices of lens 121 and lens 22 can be the same or different. Preferably, the refractive indices of lens 121 and lens 222 are not equal, thereby increasing the freedom of lens optical design.
[0048] In some embodiments, the refractive index of lens 121 and / or lens 22 is greater than 1.6, and the Abbe number of lens 121 and / or lens 222 is greater than 56. When the refractive index of both lens 121 and lens 222 is greater than 1.6, and the Abbe number of both lens 121 and lens 222 is greater than 56, the total optical length of the lens can be reduced by about 20%, with a maximum reduction of 1-2 mm. More preferably, the refractive index of lens 121 and / or lens 222 is greater than 1.8.
[0049] In some embodiments, the aforementioned glass lens is prepared by cutting a wafer 3, such as... Figure 1 As shown, wafer 3 includes multiple optical regions 31 arranged in an array, with each optical region 31 spaced apart from the others. The area of wafer 3 other than the optical regions 31 is a non-optical region 32. Wafer 3 is adapted to be diced in the non-optical region 32 to separate the multiple optical regions 31, thereby obtaining multiple wafer-level glass lenses. Using wafer-level glass lenses with higher surface accuracy and lower cost instead of molded glass lenses helps to reduce the production cost of the lens and improve the image quality of the lens.
[0050] Since both lens 121 and lens 22 are made of wafer-grade glass with high surface accuracy, the distance between their optical axes after mating is less than 3μm, or in other words, the eccentricity between lens 121 and lens 222 is less than 3μm. More preferably, the eccentricity between lens 121 and lens 222 is less than 2μm.
[0051] Since wafer-level glass lenses are obtained by dicing wafers 3, their shape accuracy is affected by the dicing accuracy. The concentricity difference between the center of the optical region and the center of the structural region of the lens, i.e., wafer-level glass lenses have a relatively large eccentricity problem, will result in significant aberrations in the lens image if conventional assembly methods are used to assemble the wafer-level glass lenses into the lens barrel. To reduce the impact of lens eccentricity on image quality, this application adopts a split lens design. The first lens component 1 and the second lens component 2 can be assembled and fixed through active calibration, without relying on the edge shape of the wafer-level glass lens for positioning, thus avoiding poor image quality caused by the eccentricity of the wafer-level glass lens.
[0052] It is worth mentioning that "active calibration" refers to determining the positions of the first lens component 1 and the second lens component 2 by ensuring that the overall imaging of the first lens component 1 and the second lens component 2 meets the requirements. The following is an exemplary description of a method for assembling the first lens component 1 and the second lens component 2 using active calibration, which includes the following steps:
[0053] Pre-positioning: The first lens component 1, the second lens component 2, and the photosensitive assembly are arranged sequentially along the optical axis so that the first lens component 1 and the second lens component 2 constitute an image-capable optical system;
[0054] Active calibration: When the photosensitive component is powered on, it acquires an image formed by the optical system consisting of the first lens component 1 and the second lens component 2. The image quality and its adjustment amount are calculated by image algorithms such as SFR and MTF. Based on the adjustment amount, 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 of the six axes. After one or more adjustments, the image quality (including optical parameters such as peak value, field curvature, and astigmatism) reaches the target value. The six axes refer to the mutually perpendicular X-axis, Y-axis, and Z-axis, as well as the RX, RY, and RZ directions that rotate around the X-axis, Y-axis, and Z-axis, respectively.
[0055] Fixing: The adhesive between the first lens component 1 and the second lens component 2 is cured, thereby fixing the first lens component 1 and the second lens component 2 in the position determined by active calibration.
[0056] It is worth mentioning that an adhesive application step is included before the bonding step. This step can be performed before or after active calibration. If performed after active calibration, one lens component needs to be removed after calibration, and the adhesive applied to the other lens component. The adhesive applied can be UV thermosetting adhesive, UV adhesive, or thermosetting adhesive, etc.
[0057] When assembling a modular lens using active calibration, the manufacturing tolerances of each lens component can be compensated by adjusting their relative positions, thus ensuring the lens's image quality meets requirements. It's worth noting that due to the characteristics of the active calibration process, the optical axes of the first lens component 1 and the second lens component 2 in the assembled modular lens have a certain angle, approximately between 0-1°.
[0058] Wafer 3 can be fabricated using WLG wafer-level glass technology. Using WLG wafer-level glass technology to fabricate wafer 3 can yield glass lenses with high surface accuracy, and this process results in less wear and tear on the molds. The following is an exemplary method for manufacturing wafer-level glass lenses using WLG wafer-level glass technology, comprising the following steps:
[0059] S1, a flat glass 4 and a pressing mold 5 are provided. The flat glass 4 has a first surface 41 and a second surface 42. The pressing mold 5 includes an upper mold 51 and a lower mold 52, as shown below. Figure 2 As shown;
[0060] S2, using the pressing mold 5, the first surface 41 and the second surface 42 of the flat glass 4 are pressed into a predetermined shape, such as... Figure 3 As shown, a wafer 3 with multiple optical regions 31 is obtained;
[0061] S3, cut wafer 3 to obtain multiple wafer-level glass lenses.
[0062] Wafer-level glass lenses manufactured using WLG wafer-level glass technology have high surface precision, and because they can be mass-produced, their production efficiency is also higher. Moreover, this process causes less wear and tear on the pressing mold 5.
[0063] A coating step may also be included between steps S2 and S3: coating the first surface 41 and / or the second surface 42, where the coating layer can be one or more of the following: anti-reflective coating, light filtering coating, protective coating, etc. Due to the characteristics of WLG wafer-level glass technology, the coating process for wafer-level glass lenses can be simplified and can be directly mass-produced on wafer 3. In other words, wafer-level glass lenses can have one or more of the following coating layers: anti-reflective coating, light filtering coating, protective coating, etc.
[0064] A blackening step can also be included between steps S2 and S3: blackening is applied to the non-optical area 32 of wafer 3, excluding the optical area 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 technology, the blackening process for wafer-level glass lenses can be simplified and can be directly mass-produced on wafer 3. In other words, the non-optical area (or structural area) of the wafer-level glass lens undergoes a blackening treatment.
[0065] 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.
[0066] After obtaining lens one 121 and lens two 122 by dicing the corresponding wafers 3, lens one 121 and lens two 122 can be laminated. Alternatively, the two wafers 3 can be laminated before dicing, and then diced to obtain laminated lens one 121 and lens two 122. For example, in the example of the method for manufacturing wafer-level glass lenses using WLG wafer-level glass technology described above in this application, the steps between step S2 and step S3 may include: obtaining two wafers 3, the shapes of the optical regions 31 of the two wafers 3 can 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 lamination. After lamination of the two wafers 3, the dicing step is performed to obtain multiple mutually laminationd lens one 121 and lens two 122. Furthermore, 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.
[0067] In some embodiments, such as Figure 4As shown, the first lens group 12 is bonded to the second lens barrel 21. The first lens component 1 also includes a first lens barrel 11 surrounding the outside of the first lens group 12. The first lens barrel 11 is bonded to the second lens barrel 21. The first lens barrel 11 mainly serves to protect the first lens group 12. The first lens group 12 and the first lens barrel 11 can 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 component 2 are actively calibrated first. After the first lens group 12 is bonded and fixed to the second lens barrel 21, the first lens barrel 11 is then bonded to the second lens barrel 21.
[0068] Furthermore, lens 121 is bonded to the second lens barrel 21. The structural region 1212 of lens 121 has an adhesive surface 1213 on the side opposite to the second lens barrel 21, such as... Figure 5 As shown, the roughness Ra of the bonding surface 1213 is 0.006μm to 0.015μm. The roughness of the bonding surface 1213 is greater than that of the optical region 1211 and also greater than that of the non-bonded area of the structural region 1212. An adhesive is provided between the bonding surface 1213 and the second lens barrel 21, and the lens 121 is bonded to the second lens barrel 21 by the adhesive. By providing a rough surface with a certain degree of roughness on the structural area of lens 121, the adhesion between lens 121 and the second lens barrel 21 can be improved, thereby enhancing the connection stability between lens 121 and the second lens barrel 21. This is especially suitable for bonding glass lenses to plastic surfaces. The coefficient of thermal expansion (CTE) of glass and common plastic materials used in lens barrels (first or second lens barrel) differs greatly. Even if a material with a relatively small CTE is used as the lens barrel material, its CTE is still larger than that of the glass lens, resulting in relatively poor adhesion and easy detachment at high temperatures or during high-low temperature changes. Therefore, providing a rough surface with a movable roughness on the glass lens is beneficial for improving the adhesion between the glass lens and the second or first lens barrel.
[0069] Compared to glass lenses fabricated using molding techniques, wafer-level glass lenses produced by dicing wafers have larger structural regions, which is more conducive to the fabrication of bonding surfaces. Specifically, the width of the structural region in glass lenses fabricated using molding processes is generally between 0.3 mm and 0.6 mm, while the width of the structural region in wafer-level glass lenses fabricated using WLG wafer-level glass technology can be greater than 0.6 mm and less than 1.5 mm. This width provides ample fabrication space for bonding surfaces.
[0070] In some embodiments, both sides of the structural region 1212 of the lens 121 are roughened to meet the bonding requirements of both sides of the lens 121.
[0071] In some embodiments, structural region 1212 of lens 121 and / or structural region 1222 of lens 122 are blackened (not shown in the figures). Those skilled in the art will understand that the blackening treatment can be applying a black film to the structural region, attaching a light-shielding material to the structural region, or other treatment methods known in the art.
[0072] In other embodiments, such as Figure 7 As shown, the first lens component 1 includes a first lens barrel 11 for accommodating the first lens group 12, that is, the first lens group 12 is mounted on the first lens barrel 11, and the first lens barrel 11 is bonded to the second lens barrel 21, that is, the first lens component 1 and the second lens component 2 are fixedly connected by an adhesive provided between the first lens barrel 11 and the second lens barrel 21.
[0073] Lens 121 and 122 in the first lens group 12 are made of glass, while conventional lens barrels are generally made of plastic. Glass and plastic have different coefficients of thermal expansion. If a glass lens is installed inside a traditional plastic lens barrel, under high temperature and pressure, the deformation of the glass lens is much smaller than that of the plastic lens barrel. This can cause a shift in the relative position of the glass lens and the plastic lens barrel, and the glass lens may even crack during temperature changes. Therefore, the first lens barrel 11 is made of a material with a coefficient of thermal expansion similar to that of the glass lens. In some preferred embodiments, the ratio of the coefficient of thermal expansion of the first lens barrel 11 to that of the glass lens is less than or equal to 300%. The first lens barrel 11 can be made of metal, or it can be made of plastic with added mineral fibers or glass fibers.
[0074] In one embodiment, the first lens barrel 11 is made of polycarbonate with added carbon fiber, wherein the mass fraction of carbon fiber is 30%. This material has a coefficient of thermal expansion of 38–42, which is essentially close to that of glass. Furthermore, this material exhibits good mold release properties and flame retardant properties, and has a density of 1.3–1.5 g / cm³. 3 It has a shrinkage rate of 0.25-0.45%, a flexural strength of 80-100 MPa, a flexural modulus of 4800-5200 MPa, and a heat distortion temperature of 120-140℃. It has high flexibility and excellent impact resistance.
[0075] In some embodiments, the first lens group 12 may also include other lenses (not shown in the figure) besides lens one 121 and lens two 122. The other lenses may or may not be wafer-grade glass lenses.
[0076] It is worth mentioning that the first lens component 1 or the second lens component 2 may also include a light-shielding element (not shown in the figure) for reducing stray light. The setting of the light-shielding element is a common technical means in the art, and will not be described in detail in this application.
[0077] This application also provides a camera module, which includes the aforementioned optical lens 100, support member 200, and photosensitive component 300. The optical lens 100 is held in the light-in-spot path of the photosensitive component 300 by the support member 200. The support member 200 may be a lens mount used only to support the optical lens 100, or it may be a motor capable of driving the optical lens 100 to perform autofocus, zoom, or image stabilization. The photosensitive component 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 component 300 is fixed to the support member 200 by the bracket 303.
[0078] 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. A split-type lens, characterized in that: The system includes a first lens assembly and a second lens assembly arranged sequentially along the optical axis. The first lens assembly includes a first lens group, which comprises a first lens and a second lens. Both the first and second lenses are glass lenses, which are made from wafers through dicing. Two wafers are joined together and then diced again to obtain the joined first and second lenses. The first lens includes an optical region 1 for imaging and a structural region 1 surrounding the optical region 1. The second lens includes an optical region 2 for imaging and a structural region 2 surrounding the optical region 2. The two structural regions are interlocked, and an adhesive is provided between the two structural regions and the first structural region. The distance between the optical axes of the first lens and the second lens is less than 3 μm. The second lens component includes a second lens barrel and a second lens group housed within the second lens barrel. The first lens component is disposed on the second lens barrel. The first lens is located between the second lens and the second lens barrel. The first structural region of the first lens has an adhesive surface on the side opposite to the second lens barrel. An adhesive is provided between the adhesive surface and the second lens barrel, and the first lens is bonded to the second lens barrel by the adhesive.
2. The split-type lens according to claim 1, characterized in that, At least one of the first lens and the second lens is a glass lens.
3. The split-type lens according to claim 2, characterized in that, Both lens one and lens two are glass lenses.
4. The split lens according to claim 2, characterized in that, The refractive indices of lens one and lens two are not equal.
5. The split-type lens according to claim 2, characterized in that, The refractive index of lens one and / or lens two is greater than 1.6, and the Abbe number of lens one and / or lens two is greater than 56.
6. The split lens according to claim 5, characterized in that, The refractive index of both lens one and / or lens two is greater than 1.
8.
7. The split lens according to any one of claims 2-6, characterized in that, 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.
8. The split lens according to any one of claims 1-6, characterized in that, An adhesive is provided between structural region two and structural region one to bond lens one to lens two.
9. The split lens according to any one of claims 1-6, characterized in that, The first structural region of the first lens is blackened, and the second structural region of the second lens is blackened.
10. The split lens according to any one of claims 1-6, characterized in that, The distance between the optical axes of the first lens and the second lens is less than 3 μm.
11. The split lens according to any one of claims 1-6, characterized in that, The roughness of the bonding surface is greater than the roughness of the surface of the optical region and also greater than the roughness of the non-bonded area of the structural region. The roughness of the bonding surface is 0.006 μm to 0.015 μm.
12. The split lens according to claim 11, characterized in that, The first lens component also includes a first lens barrel surrounding the outside of the first lens group, the first lens barrel being bonded to the second lens barrel by an adhesive, and the first lens group being connected to or not connected to the first lens barrel.
13. The split lens according to any one of claims 2-6, characterized in that, The first lens component further includes a first lens barrel for accommodating the first lens group, the first lens group being connected to the first lens barrel, the first lens barrel being bonded to the second lens barrel by an adhesive, and the ratio of the coefficient of thermal expansion of the first lens barrel to the coefficient of thermal expansion of the glass lens being less than or equal to 300%.
14. The split lens according to claim 13, characterized in that, The first lens barrel is made of metal, or the first lens barrel is made of plastic with added mineral fiber or glass fiber, or the first lens barrel is made of polycarbonate with added carbon fiber.
15. A camera module, characterized in that, Includes a split lens, a support, and a photosensitive assembly as described in any one of claims 1-14, wherein the split lens is held in the light-inlet path of the photosensitive assembly by the support.