Modular production method of optical lens and production method of camera module

Abstract

The application discloses a modular production method of an optical lens and a production method of a camera module, and comprises the following steps: S1, obtaining a standard part: pre-assembling a front lens assembly and a rear lens assembly to obtain a to-be-calibrated optical lens, calibrating the to-be-calibrated optical lens, and making the to-be-calibrated optical lens meet an optical system performance standard; the optical lens meeting the standard is defined as the standard part; S2, splitting the standard part into a standard part A and a standard part B; S3, grouping calibration: taking the standard part A as a reference, calibrating a to-be-calibrated rear lens assembly; taking the standard part B as a reference, calibrating a to-be-calibrated front lens assembly; S4, integrating and assembling: assembling the calibrated front lens assembly and the rear lens assembly. The scheme is based on a segmented calibration method of standard part reuse, reduces calibration difficulty by splitting a calibration process and reusing a standard part, and realizes efficient and high-precision lens production.

Description

Technical Field

[0001] This invention relates to the field of optical lens manufacturing technology, and in particular to a method for producing camera modules based on standard component reuse and segmented calibration, which is especially suitable for the mass production of multi-lens, high-precision optical lenses. Background Technology

[0002] Camera modules are widely used in mobile electronic devices (smartphones, dashcams, etc.) to help users capture images. As the core component of a camera module, the image quality of the optical lens directly determines the performance of the entire camera system. To meet users' demands for higher image quality, optical lenses require the stacking of more lens elements. While increasing the number of lens elements improves the lens's imaging performance, it also increases the complexity of the lens assembly process.

[0003] Traditional lens assembly methods rely on overall calibration, which means that when assembling a multi-lens lens, the parameters of multiple sets of lenses need to be adjusted simultaneously to achieve the preset optical system performance. This process accumulates large errors and is highly complex to calibrate. Moreover, all parameters need to be recalibrated each time the lens is assembled, which is time-consuming, costly, and inefficient, making it unsuitable for mass production.

[0004] The existing method for manufacturing split lenses involves pre-assembling the first lens and the second lens separately, and then calibrating them using calibration equipment. Under this method, the calibration of each optical lens still requires a relatively complex and independent process. It does not make full use of pre-calibrated standard parts to simplify the calibration process, resulting in problems such as long calibration time and high cost in the production process. This method cannot effectively meet the market demand for efficient and low-cost production of multi-lens, high-precision optical lenses. Summary of the Invention

[0005] The purpose of this invention is to provide a modular production method for optical lenses, based on a segmented calibration method that reuses standard parts. By splitting the calibration process and reusing standard parts, the calibration difficulty is reduced, and efficient and high-precision lens production is achieved.

[0006] To achieve the above objectives, the solution of the present invention is: a modular production method for optical lenses, comprising the following steps:

[0007] S1. Obtain standard parts:

[0008] An optical lens includes at least a front lens assembly and a rear lens assembly that are independent of each other. The front lens assembly includes a front lens barrel and a front lens group, and the rear lens assembly includes a rear lens barrel and a rear lens group.

[0009] The front lens assembly and the rear lens assembly are pre-assembled to obtain the optical lens to be calibrated. The optical lens is then calibrated using optical calibration equipment to make it conform to the optical system performance standards. The optical lens that meets the standards is designated as a standard part.

[0010] S2, Disassembling standard parts:

[0011] The optical lens designated as a standard component is divided into a front lens assembly and a rear lens assembly. The front lens assembly is designated as standard component A, and the rear lens assembly is designated as standard component B. Both of them meet the preset optical system performance standards and serve as the benchmark for subsequent calibration.

[0012] S3, Group Calibration:

[0013] Multiple front lens assemblies and rear lens assemblies to be calibrated are pre-assembled in batches.

[0014] Using standard part A as a reference, adjust the position of the lens assembly to be calibrated and its rear lens group to achieve the preset calibration accuracy requirements.

[0015] Using standard part B as a reference, adjust the position of the front lens assembly and its front lens group to be calibrated so that they meet the preset calibration accuracy requirements.

[0016] The calibration order of the front lens assembly and the rear lens assembly to be calibrated is not important;

[0017] S4. Integration and Assembly:

[0018] Assemble the front and rear lens assemblies that have been calibrated in step S3 to ensure assembly accuracy and optical performance.

[0019] Furthermore, in step S1, the front lens group is pre-assembled into the front lens barrel to form the front lens assembly to be calibrated, the assembly position of each lens in the front lens barrel is calibrated, and after calibration, the front lens group is fixed.

[0020] The rear lens group is pre-assembled into the rear lens barrel to form the rear lens assembly to be calibrated. The assembly positions of each lens in the rear lens barrel are calibrated. After calibration, the rear lens group is fixed.

[0021] Furthermore, in step S1, the front lens assembly to be calibrated is pre-assembled onto the rear lens assembly to be calibrated to form an optical lens to be calibrated. The relative positions of the front lens assembly and the rear lens assembly to be calibrated are calibrated. After calibration, the front lens assembly and the rear lens assembly are fixed.

[0022] Furthermore, in step S1, multiple optical lenses to be calibrated are pre-assembled, these optical lenses are calibrated, and then the sample that best meets the performance standards of the optical system is selected as the standard part.

[0023] Further, in step S3, the rear lens assembly is calibrated: the standard part A is fixed on the reference position of the calibration equipment, the rear lens assembly to be calibrated is installed on the adjustment stage, the calibration amount of the installation position of the rear lens assembly to be calibrated is calculated by the software, and the position of the lens in the rear lens barrel is adjusted according to the calibration amount. After calibration, the optical axis of the rear lens assembly coincides with the optical axis of the standard part A or is within the allowable deviation range, thus meeting the imaging standard of the optical system.

[0024] Front lens assembly calibration: Fix standard part B on the reference position of the calibration equipment; install the front lens assembly to be calibrated on the adjustment stage, use software to calculate the calibration amount of the installation position of the front lens assembly to be calibrated, and adjust the position of the lens in the front lens barrel according to the calibration amount. After calibration, the optical axis of the front lens assembly coincides with the optical axis of standard part B or is within the allowable deviation range, which meets the imaging standard of the optical system.

[0025] Furthermore, in step S4, during the integration and assembly, the mechanical contact surfaces of the calibrated front lens assembly and rear lens assembly are fixed with adhesive.

[0026] Furthermore, the front lens group includes at least two lenses, and the rear lens group includes at least two lenses.

[0027] Furthermore, a conical protrusion is formed on the inner wall of the front lens barrel near the rear side, protruding radially towards the central axis. This conical protrusion is continuously distributed circumferentially along the inner wall of the front lens barrel, serving as a fixed aperture for the optical lens. The front lens group and the rear lens group are separated by the aperture on the front lens barrel.

[0028] Furthermore, the front of the front lens barrel has a front opening, through which the front lens assembly enters the front lens barrel, and a front cover is placed on the front opening.

[0029] The rear lens barrel has a rear opening on its front side, through which the rear lens assembly enters the rear lens barrel. A rear cover is fitted over the rear opening; the cover is connected to the lens barrel by threads or snaps.

[0030] A method for manufacturing a camera module, the camera module comprising an optical lens, a photosensitive component, a circuit board, and a housing; the manufacturing method comprising the following steps:

[0031] Using the modular production method for optical lenses described above, optical lenses are produced and calibrated. The calibrated optical lenses are then mounted onto the housing and fixed in place, so that their optical axis coincides with the central axis of the housing.

[0032] Install the photosensitive component onto the circuit board and make electrical connections to ensure normal signal transmission;

[0033] The assembled optical lens and photosensitive component-circuit board are then installed into the housing.

[0034] Perform functional testing and performance calibration on the assembled camera module.

[0035] After adopting the above solution, the beneficial effects of the present invention are as follows:

[0036] This invention, by employing a split-type lens barrel structure and introducing a standard component calibration mechanism, significantly reduces calibration difficulty and improves production efficiency and yield compared to existing technologies.

[0037] 1. Standardized optical lenses are used as standard parts and then divided into standard parts A and B for separate calibration of the front and rear lens assemblies. By reusing standard parts and performing segmented calibration, the process of recalibrating all parameters for each assembly in traditional overall calibration is avoided, which greatly shortens the calibration time, improves production efficiency, and is conducive to the mass production of multi-lens, high-precision optical lenses.

[0038] 2. During the batch calibration stage, independent standard parts A and B are used to calibrate the front and rear lens assemblies to be calibrated. The segmented calibration stage is directly based on the overall optical system performance standard of the optical lens (e.g., 9G), ensuring that the front and rear lens assemblies meet the performance requirements of the optical lens in the independent calibration stage, so that the final assembly stage only requires mechanical fixation.

[0039] 3. The calibration processes for the front and rear lens assemblies are completely independent, using standard part A and standard part B as calibration benchmarks respectively, thus avoiding mutual interference between the two components during production. The production line can flexibly adjust the production rhythm and scale of each component according to actual needs, achieving dynamic optimization of production resources and improving overall capacity utilization.

[0040] 4. Standard parts have cross-specification calibration capabilities and can be compatible with the calibration of lens assemblies with different numbers of lenses. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of an existing integrated lens structure.

[0042] Figure 2 This is a flowchart of the modular production method for the optical lens of the present invention.

[0043] Figure 3 This is a schematic diagram of a standard component structure according to an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of the structure of standard part A according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the structure of standard part B according to an embodiment of the present invention.

[0046] Figure 6This is a schematic diagram of a lens assembly calibrated with standard part A according to an embodiment of the present invention.

[0047] Figure 7 This is a schematic diagram of a front lens assembly calibrated using standard part B according to an embodiment of the present invention.

[0048] Figure 8 This is a schematic diagram of the 9G lens structure after calibration and reassembly according to an embodiment of the present invention.

[0049] Label Explanation:

[0050] 1. Front lens assembly; 11. Front lens barrel; 111. Annular step; 112. Aperture; 12. Front lens group; 121. First lens element; 122. Second lens element; 123. Third lens element; 124. Fourth lens element; 125. Fifth lens element; 13. Front barrel cap; 2. Rear lens assembly; 21. Rear lens barrel; 22. Rear lens group; 221. Sixth lens element; 222. Seventh lens element; 223. Eighth lens element; 224. Ninth lens element; 23. Rear barrel cap; 3. Spacer assembly; 31. First spacer; 32. Second spacer; 33. Third spacer; 34. Fourth spacer; 35. Fifth spacer; 36. Sixth spacer; 4. Mechanical contact surface; 10. Standard part; 20. Optical lens to be calibrated; 201. Front lens assembly to be calibrated; 202. Rear lens assembly to be calibrated. Detailed Implementation

[0051] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] This invention provides a modular manufacturing method for optical lenses, such as... Figures 3 to 5 As shown, the optical lens includes a front lens assembly and a rear lens assembly. The front lens assembly includes a front lens barrel and a front lens group with at least two lenses, and the rear lens assembly includes a rear lens barrel and a rear lens group with at least two lenses.

[0053] The modular production method for the optical lens of this invention includes the following steps (reference flowchart). Figure 2 ):

[0054] S1 Standard Part 10 Acquisition:

[0055] This step primarily involves calibrating a number of standard-compliant optical lenses first, which will then serve as the benchmark for subsequent batch calibration.

[0056] First, pre-assembly: The front lens group 12 is pre-assembled into the front lens barrel 11 to form the front lens assembly 201 to be calibrated. The assembly positions of each lens relative to its position within the front lens barrel 11 are not completely fixed but can be adjusted. The rear lens group 22 is pre-assembled into the rear lens barrel 21 to form the rear lens assembly 202 to be calibrated. The assembly positions of each lens relative to its position within the rear lens barrel 21 are also not completely fixed but can be adjusted. The front lens assembly 1 is pre-assembled onto the rear lens assembly 2 to form the optical lens 20 to be calibrated. The relative positions of the front lens assembly 201 and the rear lens assembly 202 to be calibrated are also not completely fixed but can be adjusted.

[0057] Based on the assembly steps described above, multiple optical lenses 20 to be calibrated can be mass-produced first. Then, a portion of these optical lenses are selected and their optical axes are calibrated using high-precision optical calibration equipment. During the calibration process, the assembly positions of the lenses in the front lens barrel 11 and the rear lens barrel 21, as well as the assembly positions of the front lens assembly 1 and the rear lens assembly 2, are adjusted according to calibration requirements until the optical system performance of the entire optical lens reaches the preset standard. After calibration, the front lens group 12 is fixed to the front lens barrel 11, the rear lens group 22 is fixed to the rear lens barrel 21, and the front lens assembly 1 and the rear lens assembly 2 are fixed. The qualified optical lens after calibration and fixing can be used as a standard part 10.

[0058] During pre-assembly, the lens can be fixed inside the lens barrel using adhesive. This adhesive can be a mixture of UV adhesive and thermosetting adhesive. After UV exposure, the adhesive will semi-cur, achieving pre-assembly. This facilitates positional adjustments during calibration. After baking, the adhesive will fully cure, completely fixing all components. Of course, other pre-assembly fixing methods can also be used; this application does not limit the specific method.

[0059] Regarding the structure of the microscope tube:

[0060] like Figure 1 As shown, the front lens barrel 11 has a front opening on its front side, through which the front lens assembly 12 enters the front lens barrel 11. To ensure the stability and dust protection of the lens assembly, a front cap 13 is fitted onto the front opening. The cap also serves to secure the lens; when the cap is tightened, its end abuts against the nearest lens or spacer to prevent the already positioned lens inside the lens barrel from shifting or falling out. The connection between the front cap 13 and the front lens barrel 11 is flexible and varied, including but not limited to threaded connections and snap-fit ​​connections, ensuring both a secure connection and ease of subsequent maintenance and replacement.

[0061] like Figure 3As shown, the inner wall of the front lens barrel 11 has several annular steps 111 distributed along its axial direction. These annular steps 111 provide stable support for the lens mount. In actual assembly, the lens can be directly mounted on the matching annular steps 111, using the positioning surface of the steps to achieve precise positioning and stable installation; alternatively, a specially designed spacer assembly 3 can be used to adjust the axial distance between the lenses by adjusting the thickness of the spacer, achieving more flexible optical design adjustments. At the same time, the spacer can effectively disperse the stress on the lens and protect it from damage. The choice of spacer material includes, but is not limited to, materials with a low coefficient of thermal expansion (such as polyimide); any spacer material suitable for optical lenses can be used.

[0062] Similarly, the rear lens barrel 21 has a rear opening on its front side, through which the rear lens group 22 enters the rear lens barrel 21. A rear cover 23 is fitted onto this rear opening. The connection between the rear cover 23 and the lens barrel includes, but is not limited to, threaded or snap-fit ​​connections. The interior of the rear lens barrel 21 also has several annular steps 111 for mounting the lens, and these annular steps 111 are distributed along the axial direction of the rear lens barrel 21. The distance between the lens and the annular steps 111 and the lens barrel can be adjusted and stress distributed using spacers.

[0063] The existing lens structure design uses an independent aperture 112 assembly, meaning that the aperture 112 assembly and the lens barrel are separate structures. During assembly, the aperture 112 assembly needs to be installed onto the lens barrel from the outside, which complicates the installation and calibration steps of the aperture 112 assembly. This not only increases the assembly process but may also affect the accuracy and stability of the optical system due to multiple adjustments.

[0064] In contrast, this application adopts an integrated design of the aperture 112 and the lens barrel, that is, the aperture 112 and the front lens barrel 11 are integrally formed. Specifically, as Figure 1 and Figure 3 As shown, the inner wall of the front lens barrel 11 protrudes radially towards the central axis near the rear side, forming a conical boss. This conical boss is continuously distributed circumferentially along the inner wall of the front lens barrel 11. The term "conical boss" refers to a boss with a conical cross-section, such as... Figure 1 As shown, its conical tip faces the optical axis of the lens barrel, forming a fixed aperture stop 112 for the lens, and the cone angle α ranges from 30° to 60°. Furthermore, the annular steps 111 within the aforementioned front lens barrel 11 are all located on the front side of this conical protrusion; that is, after all the lenses in the front lens group 12 are assembled, they are all located on the front side of the conical protrusion. The front lens group 12 and the rear lens group 22 are naturally separated by the aperture stop 112 on the front lens barrel 11, eliminating the need for an additional independent aperture stop 112, thereby reducing the number of parts and lowering assembly errors.

[0065] Regarding the number of lenses:

[0066] This invention is particularly suitable for lens production with a large number of lenses. The more lenses there are, the more significant the effect of segmented calibration and reuse of standard parts 10. Specifically, the front lens group 12 has at least two lenses, and the rear lens group 22 also has at least two lenses. In practical applications, depending on the lens design, the number of lenses in the front lens group 12 and the rear lens group 22 can be even greater, such as three, four, or more, to achieve more complex optical functions.

[0067] S2 standard part 10 disassembly:

[0068] The optical lens standard of positioning standard component 10 is divided into a front lens assembly 1 and a rear lens assembly 2, wherein the front lens assembly 1 serves as standard component A and the rear lens assembly 2 serves as standard component B. The number of standard components 10 is not limited to one, that is, the number of standard components A and standard components B is not limited to one each. The independent front lens assembly 1 and rear lens assembly 2 both meet the preset optical system performance standards and can be used as calibration references for the optical lens 20 to be calibrated subsequently.

[0069] S3, Group Calibration:

[0070] Using the standard part 10 determined in step S2 as a reference, a batch calibration system for another lens assembly is constructed. This is a calibration method that involves calibrating the lens assembly 201 before calibration and the lens assembly 202 after calibration in groups. The lens assembly 201 before calibration and the lens assembly 202 after calibration can be leftovers from the standard part 10 produced in step S1, or they can be reassembled subsequently.

[0071] Using standard component A as a reference, the optical axis of the lens assembly 202 to be calibrated is calibrated: Standard component A is fixed on the reference position of the calibration equipment, the lens assembly 202 to be calibrated is installed on the adjustment stage, and the calibration amount of the installation position of the lens assembly 202 to be calibrated is calculated using software. Based on the calibration amount, the position of the lens in the rear lens barrel 21 is adjusted. After calibration, the optical axis of the rear lens assembly 2 coincides with the optical axis of standard component A or is within the allowable deviation range, meeting the imaging standards of the optical system.

[0072] Using standard component B as a reference, the optical axis of the front lens assembly 201 to be calibrated is calibrated: standard component B is fixed on the reference position of the calibration equipment; the front lens assembly 201 to be calibrated is installed on the adjustment stage, and the calibration amount of the installation position of the front lens assembly 201 to be calibrated is calculated using software. Based on the calibration amount, the position of the lens in its front lens barrel 11 is adjusted. After calibration, the optical axis of the front lens assembly 1 coincides with the optical axis of standard component B or is within the allowable deviation range, meeting the imaging standards of the optical system.

[0073] After the standard part was determined, the calibration equipment used to calibrate the lens assembly in this case can be any AA calibration equipment currently available on the market. The specific calibration process is as follows (based on standard part A):

[0074] Fix standard component A on the reference position of the calibration equipment, ensuring that its optical axis is precisely aligned with the measurement optical path of the calibration equipment. Mount the lens assembly 202 to be calibrated on the multi-dimensional adjustment stage, which has translational functions in the X, Y, and Z directions and rotational adjustment functions around the X, Y, and Z axes, to perform six-degree-of-freedom adjustment on the lens assembly 202 to be calibrated.

[0075] Coherent light is emitted using a high-precision interferometer and passes through both standard component A and the lens assembly 202 to be calibrated, respectively, to obtain the interference fringes generated by both. By analyzing the interference fringes, the deviation of the optical axis of the lens assembly 202 to be calibrated relative to the optical axis of standard component A is accurately measured, including the translational deviation in the horizontal direction (X-axis) and the vertical direction (Y-axis), as well as the tilt angle deviation around the X-axis and Y-axis.

[0076] Based on the interferometer measurement data and the optical design parameters of standard component A and the lens assembly 202 to be calibrated, the calibration software calculates the calibration amount for the installation position of the lens assembly 202 to be calibrated. The calibration amount includes the distance to be translated in the X, Y, and Z axes, and the angle to be rotated around the X, Y, and Z axes.

[0077] Based on the calibration values ​​calculated by the software, the positions of the lenses in the rear lens barrel 21 of the lens assembly 202 to be calibrated are adjusted. Adjustment methods include translation and tilting. During the adjustment process, the interferometer's measurement data is monitored in real time, gradually approaching the calibration target to ensure the precision and accuracy of the adjustment.

[0078] After adjustment, the interferometer is used again to measure the lens assembly 202 after calibration to verify whether its optical axis coincides with the optical axis of the standard part A or is within the allowable deviation range (e.g., deviation less than a few micrometers, tilt angle less than 0.01°). Finally, an imaging test is performed to observe the image sharpness, distortion, etc., to ensure that the imaging standards of the optical system are met.

[0079] The calibration method based on standard part B is the same as above.

[0080] It should be noted that the calibration of lens assembly 201 before calibration and lens assembly 202 after calibration are not sequential; the calibration processes are completely independent, each using its own standard parts as calibration benchmarks. Therefore, mutual interference between the two components during production can be effectively avoided, allowing the production line to flexibly adjust the production rhythm and scale of each component according to actual needs, thereby optimizing the allocation of production resources. Furthermore, this method significantly improves production efficiency, shortens product delivery cycles, and ensures the high quality and consistency of each batch of lens products.

[0081] In addition, standard part A (front lens assembly 1 reference) and standard part B (rear lens assembly 2 reference) in this solution are not limited to their original corresponding standard part 10 calibration scenarios, but have the capability for cross-specification calibration. Regardless of the specification or design of the lens assembly, as long as the required calibration accuracy does not exceed the accuracy threshold set by the original standard part 10, either standard part A or standard part B can be used as the calibration reference. See the 9G lens below for detailed explanation.

[0082] S4. Integration and Assembly:

[0083] Assemble the calibrated front lens assembly 1 and rear lens assembly 2 one-to-one in step S3 to form a standard-compliant optical lens. The two lens assemblies are fixed together using adhesive dispensing. Figure 8 As shown, the mechanical contact surfaces 4 of the two lens assemblies are fixed with ring-shaped adhesive dots.

[0084] Since both the calibrated front lens assembly 1 and rear lens assembly 2 already meet the optical system performance standards of optical lenses, only a simplified calibration procedure is required in the final assembly stage. This mainly involves simple calibration of the relative positional accuracy, concentricity, and necessary mechanical connection stability between the two lens assemblies, eliminating the need for complex calibrations of the lenses within the assemblies to meet optical lens standards. Compared to existing production methods, the integrated assembly method of this invention, through pre-assembly quality control and standardized component production, greatly simplifies the calibration steps during assembly, significantly reducing calibration difficulty and time costs.

[0085] To further improve production efficiency and flexibility, once a certain number of standard-compliant front lens assembly 1 and rear lens assembly 2 have been produced, the integration and assembly process can be started immediately, without waiting for all front and rear lens assemblies 2 to be produced before unified assembly. This is one of the advantages of this invention. This phased, assembly-line production mode allows the production line to flexibly adjust the production and assembly rhythm of the front and rear lens assemblies 2 according to current inventory status, order demand, and production capacity.

[0086] The following explanation uses a camera module with a 9G lens as an example to illustrate the production method (see reference). Figures 6 to 8 ):

[0087] S1. The front lens assembly 1 is a 5G lens. The front lens group 12 of the 5G lens includes a first lens 121, a first spacer 31, a second lens 122, a second spacer 32, a third lens 123, a third spacer 33, a fourth lens 124, and a fifth lens 125 arranged sequentially from front to back.

[0088] The rear lens assembly 2 is a 4G lens. The rear lens group 22 of the 4G lens includes a fourth spacer 34, a sixth lens 221, a seventh lens 222, a fifth spacer 35, an eighth lens 223, a sixth spacer 36, and a ninth lens 224 arranged sequentially from front to back.

[0089] The front lens assembly 1 and the rear lens assembly 2 are pre-assembled to obtain the optical lens 20 to be calibrated;

[0090] The optical lens 20 to be calibrated is calibrated, and the calibrated optical lens is used as the standard part 10. After calibration, each lens in the 5G lens and the 4G lens meets the coaxiality standard of the 9G lens.

[0091] S2. The 9G lens, designated as standard part 10, is split into a 5G lens and a 4G lens.

[0092] S3, Reference Figure 6 Using the 5G lens of the standard component 10 as standard component A, the rear lens assembly 2 is batch calibrated using optical calibration equipment to ensure that the optical axis accuracy of the rear lens assembly 2 is consistent with that of the 9G lens.

[0093] refer to Figure 7 Using a 4G lens as standard component B, and employing optical calibration equipment, batch calibration of the front lens assembly 1 is performed to ensure that the optical axis accuracy of the front lens assembly 1 is consistent with that of the 9G lens.

[0094] This section provides a detailed description of the standard parts' 10-span specification calibration capability:

[0095] Standard component A (5G lens): Based on the overall calibration results of the 9G lens, its calibration capability is backward compatible with rear lens assemblies 2 with 1 to 4 lenses. For example, when calibrating a rear lens assembly 2 with 3 lenses, the reference data of the 5G lens can be directly mapped to the optical axis adjustment of this assembly without the need for additional standard adjustments.

[0096] Standard component B (4G lens): Similarly, the 4G lens, as the rear lens assembly 2 of the 9G lens, is backward compatible with the front lens assembly 1, which has 1 to 5 lenses. For example, when calibrating the front lens assembly 1 with 2 lenses, the reference data of the 4G lens can ensure its optical matching accuracy with the front lens assembly 1.

[0097] S4, Reference Figure 8 The calibrated front lens assembly 1 and rear lens assembly 2 are assembled to obtain a complete 9G lens.

[0098] The present invention also provides a method for manufacturing a camera module, the camera module (not shown in the figure) including an optical lens, a photosensitive component, a circuit board and a housing, etc.

[0099] Based on the modular production method of the optical lens described above, the optical lens is produced and calibrated. The calibrated optical lens is then installed and fixed in the designated position of the housing. The fixing method includes, but is not limited to, screw fixing and glue fixing, to ensure that the optical lens is firmly installed on the housing and that the optical axis coincides with the central axis of the housing.

[0100] Mount the image sensor onto the circuit board and make electrical connections. Ensure a secure connection between the image sensor and the circuit board, and that signal transmission is normal. Assemble the optical lens and image sensor-circuit board assembly into the housing. Perform preliminary testing on the assembled camera module, including visual inspection and electrical performance testing, to ensure its basic functions are normal.

[0101] Finally, functional testing and performance calibration are performed. For example, parameters such as exposure time and gain of the image sensor are adjusted to optimize image quality; the focusing mechanism of the optical lens is calibrated to ensure accurate and fast focusing. The final product is a camera module that meets the standards.

[0102] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0103] Furthermore, the directions such as front, back, left, and right mentioned in this embodiment are only for reference and do not represent the actual directions in use. In addition, the terms "front," "back," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A modular manufacturing method for an optical lens, characterized in that, Includes the following steps: S1. Obtain standard parts (10): The optical lens includes at least a front lens assembly (1) and a rear lens assembly (2) that are independent of each other. The front lens assembly (1) includes a front lens barrel (11) and a front lens group (12), and the rear lens assembly (2) includes a rear lens barrel (21) and a rear lens group (22). The front lens assembly (1) and the rear lens assembly (2) are pre-assembled to obtain the optical lens (20) to be calibrated. The optical lens is calibrated using an optical calibration device to make it conform to the optical system performance standard. The optical lens that conforms to the standard is designated as the standard part (10). S2, Disassemble standard parts (10): The optical lens designated as standard part (10) is split into a front lens assembly (1) and a rear lens assembly (2). The front lens assembly (1) is designated as standard part A and the rear lens assembly (2) is designated as standard part B. Both meet the preset optical system performance standards and serve as the benchmark for subsequent calibration. S3, Group Calibration: Multiple front lens assemblies (201) and rear lens assemblies (202) to be calibrated were pre-assembled in batches. Using standard part A as a reference, adjust the installation position of the lens assembly (202) to be calibrated so that it meets the preset calibration accuracy requirements; Using standard part B as a reference, adjust the installation position of the front lens assembly (201) to be calibrated so that it meets the preset calibration accuracy requirements; The calibration order of the front lens assembly (201) and the rear lens assembly (202) to be calibrated is not important; S4. Integration and Assembly: Assemble the front lens assembly (1) and rear lens assembly (2) that have been calibrated in step S3 to ensure assembly accuracy and optical performance.

2. The modular production method for optical lenses as described in claim 1, characterized in that: In step S1, the front lens group (12) is pre-assembled into the front lens barrel (11) to form the front lens assembly (201) to be calibrated. The assembly position of each lens in the front lens barrel (11) is calibrated. After calibration, the front lens group (12) is fixed. The rear lens group (22) is pre-assembled into the rear lens barrel (21) to form the rear lens assembly (202) to be calibrated. The assembly position of each lens in the rear lens barrel (21) is calibrated. After calibration, the rear lens group (22) is fixed.

3. The modular production method for optical lenses as described in claim 2, characterized in that: In step S1, the front lens assembly (201) to be calibrated is pre-assembled onto the rear lens assembly (202) to be calibrated to form the optical lens (20) to be calibrated. The relative positions of the front lens assembly (1) and the rear lens assembly (2) are calibrated. After calibration, the front lens assembly (1) and the rear lens assembly (2) are fixed.

4. The modular production method for optical lenses as described in claim 1, characterized in that: In step S1, multiple optical lenses (20) to be calibrated are pre-assembled, these optical lenses (20) to be calibrated are calibrated, and then the sample that best meets the performance standards of the optical system is selected as the standard part (10).

5. The modular production method for optical lenses as described in claim 1, characterized in that: In step S3, the rear lens assembly (2) is calibrated: the standard part A is fixed on the reference position of the calibration equipment, the rear lens assembly (202) to be calibrated is installed on the adjustment stage, the calibration amount of the installation position of the rear lens assembly (202) to be calibrated is calculated by the software, and the position of the lens in the rear lens barrel (21) is adjusted according to the calibration amount. After calibration, the optical axis of the rear lens assembly coincides with the optical axis of the standard part A or is within the allowable deviation range, which meets the imaging standard of the optical system. Calibration of front lens assembly (1): Fix the standard part B on the reference position of the calibration equipment; install the front lens assembly (201) to be calibrated on the adjustment stage, use software to calculate the calibration amount of the installation position of the front lens assembly (201) to be calibrated, and adjust the position of the lens in the front lens barrel (11) according to the calibration amount. After calibration, the optical axis of the front lens assembly coincides with the optical axis of the standard part B or is within the allowable deviation range, which meets the imaging standard of the optical system.

6. The modular production method for optical lenses as described in claim 1, characterized in that: In step S4, during the integration and assembly, the mechanical contact surfaces (4) of the calibrated front lens assembly (1) and rear lens assembly (2) are fixed with adhesive.

7. The modular production method for optical lenses as described in claim 1, characterized in that: The front lens group (12) includes at least two lenses, and the rear lens group (22) includes at least two lenses.

8. The modular production method for an optical lens as described in claim 1, characterized in that: The inner wall of the front lens barrel (11) protrudes radially toward the central axis near the rear side to form a conical boss. The conical boss is continuously distributed circumferentially along the inner wall of the front lens barrel (11) and serves as a fixed aperture (112) for the optical lens. The front lens group (12) and the rear lens group (22) are separated by the aperture (112) on the front lens barrel (11).

9. The modular production method for an optical lens as described in claim 1, characterized in that: The front lens barrel (11) has a front lens barrel opening on its front side, through which the front lens assembly (12) enters the front lens barrel (11), and a front lens barrel cover (13) is placed on the front lens barrel opening. The rear lens barrel (21) has a rear lens opening on its front side. The rear lens assembly (22) enters the rear lens barrel (21) through the rear lens opening. A rear lens cover (23) is fitted on the rear lens opening. The cover is connected to the corresponding lens barrel by threads or snaps.

10. A method for producing a camera module, characterized in that: The camera module includes an optical lens, a photosensitive component, a circuit board, and a housing; the manufacturing method includes the following steps: Using the modular production method of the optical lens according to any one of claims 1 to 9, an optical lens is produced and calibrated, and the calibrated optical lens is installed on the housing and fixed so that its optical axis coincides with the central axis of the housing; Install the photosensitive component onto the circuit board and make electrical connections to ensure normal signal transmission; The assembled optical lens and photosensitive component-circuit board are then installed into the housing. Perform functional testing and performance calibration on the assembled camera module.

Images