Clamp and camera assembly method

Abstract

The application relates to the technical field of camera assembly, in particular to a clamp and a camera assembly assembling method. The camera assembly assembling method comprises the following steps: placing a motor into a mounting position of the clamp, wherein the mounting position is located between an image sensor and a target object along a first direction; inserting a lens into a motor carrier; controlling the lens to move along the first direction, and acquiring images of the target object at different positions of the lens; acquiring first resolving forces of a first mark point on the target object in multiple images; fitting a first resolving force curve based on the multiple first resolving forces, wherein the abscissa of the first resolving force curve is a position coordinate of the lens along the first direction, and the ordinate of the first resolving force curve is the first resolving force; acquiring a first position coordinate corresponding to a vertex of the first resolving force curve; adjusting the lens to a position indicated by the first position coordinate; and fixing the lens and the motor carrier. The application can reduce the risk of unclear shooting images.

Description

Technical Field

[0001] This application relates to the field of camera component assembly technology, and in particular to a fixture and a method for assembling camera components. Background Technology

[0002] Current electronic devices, taking mobile phones as an example, typically include a lens and a drive motor in their camera modules. The drive motor is the carrier in the camera module that realizes focusing and / or image stabilization. The lens is usually fixed on the drive motor. Under the driving force generated by the drive motor, the lens moves to a designated position, thereby realizing focusing and / or image stabilization.

[0003] However, in practice, there is a problem with unclear images. Summary of the Invention

[0004] This application discloses an assembly method for a fixture and camera assembly, which can reduce the risk of unclear images.

[0005] To achieve the above objectives, in a first aspect, embodiments of this application disclose a method for assembling a camera assembly, comprising: The motor is placed in the mounting position of the clamp, wherein the mounting position is located between the image sensor and the target object along a first direction; Insert the lens into the motor carrier; Control the lens to move along the first direction and acquire images of the target object when the lens is in different positions; Obtain the first resolution of the first marker point on the target object in multiple frames of the image; A first resolution curve is formed by fitting multiple first resolution forces. The horizontal axis of the first resolution curve is the position coordinate of the lens along the first direction, and the vertical axis of the first resolution curve is the first resolution force. Obtain the coordinates of the first position corresponding to the vertex of the first analytical force curve; Adjust the lens to the position indicated by the first position coordinates; The lens is fixed to the motor carrier.

[0006] In an alternative embodiment, the first marker point is located on the optical axis of the lens.

[0007] In an optional embodiment, the target object further has a plurality of second marker points arranged around the first marker point, and the step of fixing the lens to the motor carrier includes: Obtain the planar coordinates of the first marker point and the plurality of second marker points on the vertical plane of the first direction; The resolution of each of the second marker points in the multiple frames of the image is obtained respectively; Multiple analytical force curves are formed by fitting multiple analytical forces at each of the second marker points; Obtain the second position coordinates corresponding to the vertex of the analytical force curve for each of the second marker points; A virtual plane is formed by fitting the planar coordinates and the first position coordinates of the first marker point, as well as the planar coordinates and the corresponding second position coordinates of each of the second marker points; Obtain the tilt angle of the virtual plane relative to the vertical plane of the first direction; The lens rotation is controlled based on the tilt angle so that the optical axis of the lens is parallel to the first direction.

[0008] In an optional embodiment, the step of obtaining the tilt angle of the virtual plane relative to the vertical plane of the first direction includes: Obtain the plane equation of the virtual plane, which is Z = aX + bY + c, where a and b are both slopes; The first tilt angle of the lens around the Y-axis is calculated based on the slope a, and the second tilt angle around the X-axis is calculated based on the slope b. The X-axis, Y-axis and the first direction are perpendicular to each other. The step of controlling the lens rotation based on the tilt angle includes: The lens is controlled to rotate around the Y-axis according to the first tilt angle; The lens is controlled to rotate around the X-axis according to the second tilt angle.

[0009] In one alternative embodiment, the target object has multiple corners, and each of the second marking points is distributed on each of the corners.

[0010] In an optional embodiment, the step of controlling the lens to move along the first direction and acquiring images of the target object at different positions of the lens further includes: The motor carrier is pressed against the motor base along the direction of the lens axis.

[0011] In an optional embodiment, the method further includes, prior to the step of controlling the lens to move along the first direction and acquiring images of the target object at different positions of the lens: Apply adhesive to the mating area of ​​the lens and / or the motor carrier; The step of fixing the lens to the motor carrier includes: The adhesive is cured to fix the lens to the motor carrier.

[0012] In an optional embodiment, after the step of applying adhesive at the mating point of the lens and / or the motor carrier, the method further includes: Control the lens to rotate relative to the motor carrier about its own axis.

[0013] In one optional embodiment, the motor carrier is provided with a stop portion, and the lens is provided with a limiting portion. The stop portion can stop the limiting portion to restrict the movement of the lens relative to the motor carrier toward the light-emitting side of the lens. When the lens is located at the position indicated by the first position coordinate, there is a gap between the stop and the limiting part.

[0014] In one optional embodiment, the lens includes a first lens portion disposed near its own light-incident side and a second lens portion disposed near its own light-outceasing side, wherein the diameter of the second lens portion is larger than the diameter of the first lens portion, and the limiting portion is disposed on the first lens portion. The motor carrier has a mounting hole for inserting the lens. The mounting hole is provided with a stop portion, which can stop the second lens portion to restrict the lens from moving relative to the motor carrier toward the light-incident side of the lens. When the lens is located at the position indicated by the first position coordinate, there is a gap between the stop portion and the second lens portion.

[0015] In one optional embodiment, the stop portion extends circumferentially along the mounting hole, and the stop portion is provided with a clearance opening for the limiting portion to pass through. The stop portion is also provided with a plurality of glue injection ports distributed circumferentially along the mounting hole, and the size of the glue injection port is smaller than the size of the clearance opening along the circumferential direction of the mounting hole.

[0016] Secondly, this application provides a fixture for use in the assembly method described in any of the above embodiments, the fixture comprising: The substrate has the mounting position provided on it; A clamping element is movably disposed on the base body for clamping or releasing the motor housing; A drive element is movably disposed on the base for driving the lens to move along the first direction.

[0017] In one alternative embodiment, the clamping member slides with the base along a second direction to clamp or release the motor housing, the second direction being perpendicular to the first direction; The substrate includes a first plane and a second plane that are perpendicular to each other, and a first corner is formed between the first plane and the second plane. The clamping member includes a first extrusion surface and a second extrusion surface that are perpendicular to each other, and a second corner is formed between the first extrusion surface and the second extrusion surface. The first corner and the second corner are arranged opposite to each other along the second direction. The first plane, the second plane, the first extrusion surface, and the second extrusion surface are all used to contact the motor housing surface.

[0018] In one optional embodiment, the mounting position is a through hole penetrating the substrate, and the clamping member can extend into or out of the through hole along the second direction, wherein the first plane and the second plane are both inner walls of the through hole.

[0019] In an optional embodiment, the driving element is further configured to drive the lens to rotate about the X-axis and Y-axis respectively, wherein the X-axis, Y-axis and the first direction are perpendicular to each other.

[0020] In an optional embodiment, the clamp further includes a pressing member movably disposed on the base for pressing the motor carrier against the motor base along the first direction.

[0021] Compared with related technologies, the beneficial effects of this application are: The camera assembly method provided in this application, after the lens is movably inserted into the motor carrier, does not use mechanical limiting between the lens and the motor carrier for axial positioning. Instead, it drives the lens to move along a first direction, while simultaneously using an image sensor to acquire images of the target object in real time and calculates the first resolution of the first marker point on the target object in each frame of the image. Based on multiple first resolutions, a first resolution curve can be fitted. The lens position corresponding to the vertex of the first resolution curve is the actual optimal focusing position that maximizes the image resolution of the target object. Therefore, the lens is fixed with the vertex of the first resolution curve as the indicator. The final assembly position of the lens is determined by the imaging effect of the actual optical system and is no longer affected by the manufacturing error of the mechanical limiting structure. This reduces the risk that the lens cannot be installed in the preset position due to insufficient manufacturing precision of the mechanical limiting structure, thereby causing unclear images. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic flowchart of the assembly method disclosed in the embodiments of this application; Figure 2 This is a schematic diagram showing the positions of the lens, target object, and image sensor disclosed in the embodiments of this application. Figure 1 ; Figure 3 This is a schematic diagram showing the positions of the lens, target object, and image sensor disclosed in the embodiments of this application. Figure 2 ; Figure 4 This is a schematic diagram of the first analytical force curve disclosed in an embodiment of this application; Figure 5 This is a schematic diagram of the first resolving force curve and the resolving force curve of multiple second marker points disclosed in the embodiments of this application; Figure 6 This is a schematic diagram of the fixture disclosed in the embodiments of this application; Figure 7 This is a schematic diagram of the assembly structure of the fixture and motor disclosed in an embodiment of this application; Figure 8 This is a schematic diagram showing the positions of the fixture, motor, lens, and target object disclosed in an embodiment of this application. Figure 9 This is a schematic diagram showing the positions of the fixture, motor, lens, target object, and image sensor disclosed in the embodiments of this application; Figure 10 This is a schematic diagram showing the positions of the motor, lens, and image sensor disclosed in an embodiment of this application. Figure 11 This is a schematic diagram of the assembly of the motor and lens disclosed in an embodiment of this application; Figure 12 This is a schematic diagram of the motor structure disclosed in an embodiment of this application; Figure 13 This is a schematic diagram of an explosion of the motor disclosed in an embodiment of this application; Figure 14 This is a schematic diagram of the structure of the motor carrier disclosed in the embodiments of this application; Figure 15 This is a schematic diagram of the lens structure disclosed in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: 100. Motor; 101. Mounting hole; 110. Motor carrier; 111. Stop; 1111. Clearance opening; 1112. Glue injection port; 1113. Hanging groove; 120. Motor base; 130. Motor housing; 200, Fixture; 201, Mounting position; 210, Base; 211, First plane; 212, Second plane; 220, Clamping element; 221, First pressing surface; 222, Second pressing surface; 230, Pressing element; 240, Driving element; 310. Image sensor; 320. Target object; 321. First marker point; 322. Second marker point; 323. Corner / edge; 400. Lens; 410. First lens section; 411. Limiting section; 420. Second lens section. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0030] Current electronic devices, taking mobile phones as an example, typically include a lens and a drive motor in their camera modules. The drive motor is the carrier in the camera module that realizes focusing and / or image stabilization. The lens is usually fixed on the drive motor. Under the driving force generated by the drive motor, the lens moves to a designated position, thereby realizing focusing and / or image stabilization.

[0031] However, in practice, there is a problem with unclear images.

[0032] The inventors discovered that the current drive motor carrier has a mounting hole and the lens has a limiting boss. During assembly, the lens is inserted into the mounting hole until the limiting boss abuts against the edge of the mounting hole to form a limit. Then the lens is fixed to the motor carrier, thereby achieving focusing and / or image stabilization functions by relying on the movement of the motor.

[0033] The inventors further discovered that both the limiting boss and the mounting hole have manufacturing errors, which are on the order of millimeters, while the lens assembly accuracy requirement is on the order of micrometers. The above-mentioned difference in accuracy will inevitably cause the lens to be unable to be installed in the preset ideal position, ultimately resulting in unclear images.

[0034] This application discloses an assembly method for a fixture and camera assembly, which can reduce the risk of unclear images. The assembly method for the fixture and camera assembly provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0035] like Figures 1 to 4 As shown in the figure, this application discloses a method for assembling a camera assembly, including: S110. Place the motor 100 into the mounting position 201 of the clamp 200, wherein the mounting position 201 is along the first direction ( Figure 2 The direction indicated by the arrow in the middle (z) is located between the image sensor 310 and the target object 320. Specifically, the motor 100 can be fixed in the mounting position 201, waiting for the subsequent insertion of the lens 400. At this time, the motor 100 can be in a non-powered or power-initialized state, and the motor carrier 110 (the movable part used to support the lens 400) is in a free state or a reset state; the image sensor 310 is used to receive light signals and convert them into electrical signals for subsequent analysis.

[0036] S120. Insert the lens 400 into the motor carrier 110.

[0037] In this step, the lens 400 is not fixedly connected to the motor carrier 110. Therefore, after the lens 400 is inserted into the motor carrier 110, the lens 400 can slide relative to the mounting hole 101 in the first direction. The initial depth of the lens 400 inserted into the motor carrier 110 can be arbitrarily selected, as long as it has sufficient subsequent movement.

[0038] S130: Control the lens 400 to move along the first direction and acquire images of the target object 320 at different positions of the lens 400. For example, the lens 400 can be moved by an external drive unit 240. After the drive unit 240 clamps the lens 400, it can drive the lens 400 to move along the first direction. The movement accuracy of the drive unit 240 can be at the micrometer or submicrometer level.

[0039] During the movement of the lens 400, each time a preset position coordinate is reached, the image sensor 310 acquires an image of the target object 320 formed by the lens 400, thereby obtaining images of the target object 320 at multiple different positions of the lens 400. These position coordinates constitute multiple sampling positions of the lens 400 along the first direction.

[0040] S140, Obtain the first resolution of the first marker point 321 on the target object 320 in multiple frames of images.

[0041] Resolution is a quantitative metric used to evaluate image sharpness. It can be, for example, the modulation transfer function (MTF) value, spatial frequency response (SFR) value, or the contrast value of the first marker point 321 in the image, the sum of gradient magnitudes, etc. Taking the MTF value as the resolution as an example, the MTF value of the first marker point 321 in each frame of the image can be calculated, and this MTF value can be used as the first resolution corresponding to that image. At each preset position along the first direction (e.g.) Figure 4 The coordinates of positions A to H in the data are used to calculate the first resolution of the first marker point 321, thus obtaining the data point set.

[0042] S150. A first resolution curve is formed based on fitting multiple first resolution forces. The horizontal axis of the first resolution curve is the position coordinate of the lens 400 along the first direction, and the vertical axis of the first resolution curve is the first resolution force.

[0043] By performing curve fitting on a discrete set of data points, a smooth first analytical force curve fxo is obtained (see reference). Figure 4 The fitting method can be the least squares polynomial fitting, such as using a quadratic polynomial for fitting.

[0044] S160. Obtain the first position coordinates corresponding to the vertex of the first analytical force curve.

[0045] The first position coordinate represents the optimal focusing position under the assembly conditions that enables the imaging resolution of the first marker point 321 to reach its theoretical maximum value, which is also the ideal assembly position of the lens 400 relative to the image sensor 310.

[0046] S170, Adjust the lens 400 to the position indicated by the first position coordinate.

[0047] Based on the calculated first position coordinates, the lens 400 is precisely driven to that position by an external precision drive 240, so that the lens 400 is at the depth with optimal resolution within the motor carrier 110.

[0048] S180. Fix the lens 400 to the motor carrier 110. The fixing method can be adhesive curing, ultrasonic welding or laser welding, etc.

[0049] While maintaining the lens 400 at the position indicated by the first coordinate, the lens 400 is fixedly connected to the motor carrier 110. Taking adhesive curing as an example, a curable adhesive (such as UV-curing adhesive) can be applied to the mating area between the lens 400 and the motor carrier 110, and then cured by UV light, thereby firmly fixing the lens 400 to the motor carrier 110. After fixing, the lens 400 and the motor carrier 110 form a single unit, which can then be driven by the motor 100 to achieve focusing and / or image stabilization functions.

[0050] The camera assembly method provided in this application, after the lens 400 is movably inserted into the motor carrier 110, does not use the mechanical limit between the lens 400 and the motor carrier 110 for axial positioning. Instead, it drives the lens 400 to move along a first direction, while simultaneously using the image sensor 310 to acquire images of the target object 320 in real time and calculates the first resolution of the first marker point 321 on the target object 320 in each frame. Based on multiple first resolutions, a first resolution curve can be fitted. The position of the lens 400 corresponding to the vertex of the first resolution curve is the actual optimal focusing position that maximizes the imaging resolution of the target object 320. Therefore, the lens 400 is fixed by indicating the vertex of the first resolution curve. The final assembly position of the lens 400 is determined by the imaging effect of the actual optical system and is no longer affected by the manufacturing error of the mechanical limit structure. This reduces the risk that the lens 400 cannot be installed in the preset position due to insufficient manufacturing precision of the mechanical limit structure, thus causing unclear images.

[0051] In one alternative embodiment, the first marker point 321 is located on the optical axis of the lens 400. For example, the first marker point 321 can be pre-fabricated at the geometric center of the target object 320, and during the system debugging phase, the first marker point 321 is initially located on the optical axis of the lens 400.

[0052] When the first marker point 321 is set at the center of the optical axis, the image of the first marker point 321 acquired by the image sensor 310 corresponds to the central field of view of the lens 400. In the optical system, the central region of the optical axis is the position with the smallest aberration and the highest imaging quality. In this way, the first resolution curve can more sensitively reflect the optimal focal plane position of the lens 400 relative to the image sensor 310, reduce the interference of off-axis aberrations such as field curvature and astigmatism on the peak determination, and further improve the accuracy of the final assembly position of the lens 400.

[0053] Of course, in other embodiments, the first marker point 321 may also be offset from the optical axis of the lens 400, and this application does not limit this.

[0054] In one alternative embodiment, please refer to Figure 3 and Figure 5 The target object 320 also has a plurality of second marker points 322, which are arranged around the first marker point 321. For example, the plurality of second marker points 322 can be evenly distributed on a circle centered on the first marker point 321, or arranged in a rectangular array around the first marker point 321. Before step S180, the following steps are included: S190. Obtain the planar coordinates of the first marker point 321 and multiple second marker points 322 on the vertical plane of the first direction.

[0055] For ease of description, a three-dimensional coordinate system is established with the first direction as the Z-axis. The perpendicular plane of the first direction is the XY plane. The planar coordinates of the first marker point 321 are (X0, Y0), and the first position coordinates corresponding to the vertex of the first resolving force curve are Z0. The planar coordinates of each second marker point 322 are (Xk, Yk), k=1, 2, ... N. These planar coordinates can be determined by the positions of the first marker point 321 and the second marker point 322 on the pre-calibrated target object 320, or by analyzing the images captured by the image sensor 310.

[0056] S200: Obtain the resolution of each second marker point 322 in multiple frames of images.

[0057] As the lens 400 moves along the Z direction, at each sampling position, the image sensor 310 acquires an image of the target object 320 and extracts the resolution of the second marker point 322 in each image.

[0058] S210. Multiple resolving force curves are formed by fitting multiple resolving forces based on each of the second marker points 322. Specifically, taking the second marker points 322, which include points S, P, R, and Q, as an example, the above multiple resolving force curves are: Figure 5 The fxs, fxp, fxr, and fxq curves in the text. Figure 5 These are the multiple resolution curves formed by fitting the image as the lens moves from top to bottom to find focus. Figure 5 It can be seen that points q and p appear as vertices after the first marker point 321, which means that the position of points q and p corresponding to the camera 400 is too low; similarly, points s and r appear as vertices before the first marker point 321, which means that the position of points s and r corresponding to the camera 400 is too low.

[0059] Each resolution curve here corresponds to a second marker point 322. The horizontal axis of the resolution curve is the position coordinate Zk of the lens 400 along the Z direction, and the vertical axis is the resolution.

[0060] S220. Obtain the second position coordinates corresponding to the vertex of the resolution curve of each second marker point 322, that is: each second marker point 322 corresponds to a Z-axis position with the clearest image.

[0061] S230. A virtual plane is formed by fitting the planar coordinates and first position coordinates of the first marker point 321, and the planar coordinates and corresponding second position coordinates of each second marker point 322. For example, when there are three or more second marker points 322, the least squares method can be used to fit and form the virtual plane.

[0062] Using the planar coordinates (X0, Y0) of the first marker point 321 and its optimal first position coordinate Z0, and the planar coordinates (Xk, Yk) of each second marker point 322 and their corresponding optimal position coordinate Zk, these coordinates constitute several sets of spatial points in three-dimensional space. These spatial points describe the optimal focusing plane of the actual image plane at different field-of-view positions. Ideally, if the optical axis of the lens 400 is perpendicular to the plane of the image sensor 310 (i.e., parallel to the first direction), the Z coordinates of the first marker point 321 and all the second marker points 322 should be completely equal, forming a virtual plane perpendicular to the Z-axis. However, in actual assembly, since the lens 400 may be tilted, the marker points are often not coplanar, resulting in an overall tilted spatial distribution.

[0063] S240. Obtain the tilt angle of the virtual plane relative to the vertical plane of the first direction.

[0064] For example, the tilt angle can be represented by the angle between the plane normal vector and the Z-axis, or it can be decomposed into rotation angles about the X-axis and about the Y-axis.

[0065] S250: Control the rotation of lens 400 based on the tilt angle so that the optical axis of lens 400 is parallel to the first direction.

[0066] Specifically, the rotation of the lens 400 can be controlled by an external drive unit 240, so that the optical axis of the lens 400 is parallel to the first direction. For example, steps S190 to S250 can be performed entirely before step S170, that is, the tilt of the lens 400 is adjusted first, and then the axial position of the lens 400 along the first direction is adjusted.

[0067] As can be seen, this application can not only adjust the position of the lens 400 along the first direction based on the vertex of the first resolution curve, but also obtain the tilt angle of the lens 400 through a virtual plane, thereby adjusting the optical axis of the lens 400 to a position parallel to the first direction, ensuring the perpendicularity of the optical axis of the lens 400, making the entire image plane more uniform and clear, and eliminating edge blurring or unilateral defocusing caused by the tilt of the lens 400.

[0068] In an optional embodiment, step S240 includes: S241. Obtain the plane equation of the virtual plane, which is Z = aX + bY + c, where a and b are both slopes. Specifically, X and Y are the planar coordinates of each marker point on the vertical plane.

[0069] S242. Calculate the first tilt angle of lens 400 around the Y-axis based on the slope a, and calculate the second tilt angle around the X-axis based on the slope b. The X-axis, Y-axis and the first direction are perpendicular to each other.

[0070] After obtaining the plane equation, the slopes a and b reflect the degree of tilt of the virtual plane in the X and Y directions, respectively. Specifically, in a coordinate system where the X-axis, Y-axis, and the first direction (Z-axis) are perpendicular to each other, when the lens 400 rotates slightly around the Y-axis, the coordinates of the focal plane along the X-axis will exhibit a linear change, and the rate of change is the degree of tilt around the Y-axis. Therefore, the first tilt angle of the lens 400 around the Y-axis can be calculated based on the slope a, and the relationship between the two is θx = arctan(a).

[0071] Similarly, when the lens 400 rotates slightly around the X-axis, the coordinates of the focal plane along the Y-direction change linearly, and the rate of change is the degree of tilt around the X-axis. Therefore, the second tilt angle around the X-axis can be calculated based on the slope b, i.e., θy = arctan(b).

[0072] Step S250 includes: S251. Control the lens 400 to rotate around the Y-axis according to the first tilt angle to compensate for the tilt component of the focal plane in the X direction.

[0073] S252. Control the lens 400 to rotate around the X-axis according to the second tilt angle to compensate for the tilt component of the focal plane in the Y direction.

[0074] This embodiment decomposes the spatial tilt of the lens 400 into two independent rotational components around the X-axis and around the Y-axis, and performs quantitative correction based on the slope of the corresponding direction in the plane equation. This makes the tilt adjustment have a clear physical correspondence and operability, and can quickly and accurately eliminate the influence of the optical axis tilt of the lens 400 on the image quality, ensuring that the assembled camera assembly can achieve uniform and optimal clarity throughout the entire field of view.

[0075] For example, the lens 400 can be rotated slightly around two orthogonal axes (X-axis and Y-axis) perpendicular to the optical axis by an external drive unit 240 to compensate for θx and θy, so that the optical axis of the lens 400 is once again parallel to the first direction. For example, the drive unit 240 can be a clamping mechanism with multi-degree-of-freedom adjustment function and a piezoelectric drive platform.

[0076] In one alternative embodiment, please refer to Figure 3 The target object 320 has multiple corner portions 323, and each second marking point 322 is distributed on each corner portion 323. For example, the target object 320 here can be in the shape of a rectangular plate.

[0077] In this embodiment, each second marker point 322 is set at the corner 323 of the target object 320. In this way, each second marker point 322 will be located at the edge of the imaging field of view of the lens 400, and each second marker point 322 will be far away from the first marker point 321.

[0078] When the optical axis of the lens 400 is tilted relative to the photosensitive surface of the image sensor 310, the Z-axis distance between the optimal focusing position of the second marker point 322 at the corner 323 and the optimal focusing position of the first marker point 321 differs significantly. Since the focal plane offset caused by the tilt increases linearly with the increase of the field of view height, the edge field of view is much more sensitive to tilt than the near-optical axis region. Therefore, by using the second marker point 322 at the corner 323 for virtual plane fitting, the small amount of optical axis tilt can be amplified into a significant Z-coordinate difference, resulting in higher accuracy in the calculation of slopes a and b. Thus, even when the tilt angle of the lens 400 is extremely small, this embodiment can still capture the image plane tilt and achieve precise correction through subsequent rotation adjustments.

[0079] In an optional embodiment, the method further includes the following step before step S130: S260, Press the motor carrier 110 against the motor base 120 along the direction of the lens 400 axis.

[0080] Before step S130 in this embodiment, a pre-pressure along the first direction is applied to the motor carrier 110, pressing the motor carrier 110 against the motor base 120, thereby eliminating the gap between the motor carrier 110 and the motor base 120, and determining the position of the motor carrier 110 relative to the motor base 120 and the image sensor 310. Thus, when the lens 400 is subsequently driven to move within the mounting hole 101, since the position of the motor carrier 110 along the first direction is constrained, it will not experience any displacement along with the movement of the lens 400. The position information of the lens 400 can accurately correspond to the true relative position of the lens 400 with respect to the motor carrier 110 and the image sensor 310, ensuring that the position coordinates of the lens 400 along the first direction corresponding to each acquired frame of image are accurate. This allows the subsequently fitted first resolution curve to truly reflect the change in image sharpness with the position of the lens 400, ensuring that the finally obtained first position coordinates accurately point to the actual optimal focus position.

[0081] In an optional embodiment, the method further includes the following step before step S130: S270. Apply adhesive to the mating area of ​​the lens 400 and / or the motor carrier 110.

[0082] For example, an appropriate amount of adhesive may be applied to the outer wall of the lens barrel of the lens 400 and / or the inner wall of the mounting hole 101 before the lens 400 is inserted into the mounting hole 101 of the motor carrier 110; or, adhesive may be applied between the two after the lens 400 is inserted into the mounting hole 101 of the motor carrier 110. The adhesive may be a UV-curable adhesive or a thermosetting adhesive.

[0083] Step S180 includes: The adhesive is cured to fix the lens 400 to the motor carrier 110.

[0084] If adhesive is applied after the lens 400 has been adjusted to its optimal position, the flow pressure of the adhesive and the contact force of the dispensing needle during the application process may cause a slight positional shift in the already precisely positioned lens 400. However, this embodiment uses pre-applied adhesive, which remains in a fluid state within the mating gap between the lens 400 and the motor carrier 110 throughout the adjustment process. The adhesive does not exert any additional constraint on the free movement of the lens 400. After adjustment, direct curing locks the lens 400 in its current position, avoiding the risk of secondary shifts introduced by subsequent adhesive application.

[0085] In an optional embodiment, step S270 is followed by: S280, control the lens 400 to rotate relative to the motor carrier 110 around its own axis. For example, control the lens 400 to rotate one or more revolutions around its own axis.

[0086] During adhesive application, localized accumulation or uneven thickness may occur. In this embodiment, by rotating the lens 400, the adhesive is evenly scraped and spread within the annular gap between the outer wall of the lens barrel and the inner wall of the mounting hole 101. This eliminates the risk of stress concentration caused by localized adhesive accumulation and ensures a consistent adhesive layer thickness throughout the circumference. Simultaneously, the rotation of the lens 400 effectively removes any air bubbles that may be present in the adhesive, preventing them from forming voids after curing and affecting connection strength and assembly stability.

[0087] In one alternative embodiment, please refer to Figures 11 to 15 The motor carrier 110 is provided with a stop portion 111, and the lens 400 is provided with a limiting portion 411. The stop portion 111 can stop the limiting portion 411 to restrict the movement of the lens 400 relative to the motor carrier 110 toward the light-emitting side of the lens 400. For example, the stop portion 111 can be an annular flange or a partial stop.

[0088] When the lens 400 is located at the position indicated by the first position coordinate, there is a gap between the stop part 111 and the limiting part 411. That is to say, the optimal imaging position of the lens 400 along the first direction is not the position when the stop part 111 and the limiting part 411 are in limiting contact.

[0089] After inserting the lens 400 into the motor carrier 110, step S130 is not usually executed immediately. In order to prevent the lens 400 from coming out of the motor carrier 110, this embodiment provides a stop 111 on the motor carrier 110 and a limiting part 411 on the lens 400. After the lens 400 is inserted into the motor carrier 110, the limiting part 411 will abut against the stop 111, thereby preventing the lens 400 from coming out of the motor carrier 110 toward the light-emitting side. Thus, the axial anti-detachment retention of the lens 400 is achieved without relying on an external fixing mechanism, so as to facilitate other preparatory work.

[0090] In step S130, the lens 400 moves along the first direction. To prevent the lens 400 from detaching from the motor carrier 110 from the light-incident side, in an optional embodiment, please refer to... Figure 14 and Figure 15 The lens 400 includes a first lens portion 410 disposed near its own light-incident side and a second lens portion 420 disposed near its own light-outceasing side. The diameter of the second lens portion 420 is larger than the diameter of the first lens portion 410, and a limiting portion 411 is disposed on the first lens portion 410.

[0091] The motor carrier 110 has a mounting hole 101 for inserting the lens 400. The mounting hole 101 is provided with a stop 111, which can stop the second lens 420 to restrict the movement of the lens 400 relative to the motor carrier 110 toward the light-incident side of the lens 400. When the lens 400 is located at the position indicated by the first position coordinate, there is a gap between the stop 111 and the second lens 420.

[0092] In this embodiment, the diameter of the second mirror portion 420 is set to be larger than that of the first mirror portion 410, and a stop portion 111 is formed in the mounting hole 101 to stop the light-emitting portion 411. The second mirror portion 420 and the stop portion 111 limit the displacement distance of the lens 400 toward the light-incident side, preventing the lens 400 from detaching from the motor carrier 110 during its movement toward its own light-incident side.

[0093] In this embodiment, the second lens portion 420 is a naturally formed variable-diameter section of the lens 400 to accommodate a larger optical lens. The stop portion 111 is a structure that stops the light-emitting portion 411 on the light-emitting side. In other words, this embodiment reuses the second lens portion 420 and the stop portion 111 without adding an additional stop structure, which can stop the light-incident portion of the lens 400, making the structure of the lens 400 and the motor carrier 110 simpler.

[0094] In one alternative embodiment, please refer to Figure 14 The stop portion 111 extends circumferentially along the mounting hole 101, and the stop portion 111 is provided with a clearance opening 1111 for the limiting portion 411 to pass through. The stop portion 111 is also provided with a plurality of glue injection ports 1112 distributed circumferentially along the mounting hole 101. Along the circumferential direction of the mounting hole 101, the size of the glue injection port 1112 is smaller than the size of the clearance opening 1111.

[0095] The process of inserting the lens 400 into the motor carrier 110 is as follows: The first lens portion 410 of the lens 400 is aligned with the mounting hole 101 of the motor carrier 110. The circumferential relative angle between the lens 400 and the motor carrier 110 is adjusted so that the limiting portion 411 on the first lens portion 410 is aligned with the clearance opening 1111 on the stop portion 111 inside the mounting hole 101. Then, the first lens portion 410 is inserted into the mounting hole 101 from bottom to top. As the lens 400 gradually penetrates deeper, the limiting portion 411 moves upwards with the first lens portion 410 and passes through the clearance opening 1111 until the limiting portion 411 completely passes through the plane of the stop portion 111 and reaches above the stop portion 111. After the limiting portion 411 passes through the clearance opening 1111, the lens 400 is rotated by a certain angle so that the limiting portion 411 is aligned with the solid portion of the stop portion 111 located outside the glue injection port 1112 and the clearance opening 1111. At this point, the lens 400 can be released. The lens 400 will descend under the action of gravity, causing the lower surface of the limiting part 411 to contact the upper surface of the stop part 111, and the limiting part 411 of the lens 400 will be suspended on the stop part 111.

[0096] Since the glue inlet 1112 is used for subsequent glue injection, its small circumferential size effectively limits the amount of glue injected at one time, preventing excessive glue volume. If the lens 400 is rotated after glue dispensing for even glue application, excessive glue volume can easily cause glue to overflow from the glue inlet 1112. The overflowing glue may flow along the surface of the stop part 111, thus contaminating other parts of the lens 400, causing lens contamination or affecting optical performance. The smaller glue inlet 1112 can naturally accommodate and constrain an appropriate amount of glue. Under the action of surface tension, the glue is kept in and around the glue inlet 1112. When the lens 400 is rotated, the glue is evenly scraped into the mating gap and is not easy to overflow, thereby effectively protecting the cleanliness and assembly quality of the lens 400.

[0097] For example, the stop part 111 is provided with a mounting groove 1113. When the stop part 111 stops the limiting part 411, the limiting part 411 is located in the mounting groove 1113. The mounting groove 1113 can provide an angle indication when rotating the lens 400. That is, when the limiting part 411 starts from the mounting groove 1113 and rotates back to the mounting groove 1113, the lens 400 rotates 360 degrees.

[0098] Please see Figures 6 to 9 This application also discloses a fixture 200, which is applied to the assembly method of any of the above embodiments. The fixture 200 is used to position and fix the motor 100 during the assembly process. The fixture 200 includes a base 210, a clamping member 220 and a driving member 240.

[0099] The base 210 serves as the supporting foundation for the entire fixture 200, and is provided with a mounting position 201 for mounting the motor 100. The mounting position 201 is located between the image sensor 310 and the target object 320 along the first direction. That is, when the motor 100 is placed in the mounting position 201, the lower part of the motor 100 faces the image sensor 310, and the upper part of the motor 100 faces the target object 320, thus forming a complete optical path detection link.

[0100] The clamping member 220 is movably disposed on the base 210 and is used to clamp or release the motor housing 130. The motor housing 130 is the external fixed part of the motor 100, and the motor carrier 110 is located inside the motor housing 130. The clamping member 220 can adopt various structural forms, such as pneumatic grippers, elastic jaws, threaded clamping blocks, or eccentric locking mechanisms. In the initial state, the clamping member 220 is in the released state, and the operator can place the motor 100 into the mounting position 201. After the motor 100 is placed in, the clamping member 220 is driven to actuate, so that it firmly clamps the motor housing 130, thereby reliably fixing the motor 100 as a whole within the mounting position 201.

[0101] A drive unit 240 is movably disposed on the base 210 for driving the lens 400 to move along a first direction. Exemplarily, the drive unit 240 may include a slide table capable of precise movement along the first direction, and a clamping mechanism mounted on the slide table for clamping the lens 400, such as a pneumatic gripper, a flexible chuck, or a vacuum nozzle. The slide table may be driven by a high-precision drive source, such as a linear motor, a piezoelectric ceramic actuator, or a precision lead screw mechanism driven by a differential head, with a movement resolution reaching the micrometer or even sub-micrometer level to meet the requirements for precise adjustment of the lens 400's position.

[0102] During the assembly process, when the motor 100 is fixed in the mounting position 201 by the clamping member 220, after the lens 400 is inserted into the mounting hole 101 of the motor carrier 110, the driving member 240 clamps the lens 400 and then drives the lens 400 to move up and down along the first direction, sequentially reaching each preset sampling position, and cooperating with the image sensor 310 to acquire the image of the target object 320, thereby providing position and image data for subsequent resolution calculation and curve fitting.

[0103] In one alternative embodiment, please refer to Figure 7 and Figure 8 The clamping member 220 and the base 210 are along the second direction ( Figure 8 (The direction indicated by the arrow in the middle) slides to clamp or release the motor housing 130, and the second direction is perpendicular to the first direction.

[0104] The base 210 includes a first plane 211 and a second plane 212 that are perpendicular to each other, and a first corner is formed between the first plane 211 and the second plane 212. The clamping member 220 includes a first pressing surface 221 and a second pressing surface 222 that are perpendicular to each other, and a second corner is formed between the first pressing surface 221 and the second pressing surface 222. The first corner and the second corner are arranged opposite to each other along a second direction. When the clamping member 220 slides along the second direction, it will gradually move closer to or away from the first corner.

[0105] The first plane 211, the second plane 212, the first extrusion surface 221, and the second extrusion surface 222 are all used to contact the motor housing 130.

[0106] After the motor 100 is initially placed in the mounting position 201, there may be an angular deviation between its actual spatial posture and the preset ideal position, that is, the motor 100 may not be completely aligned. At this time, if the drive component 240 directly drives the lens 400 to move along the first direction, this direction of movement may not be parallel to the actual axis of the mounting hole 101 of the motor carrier 110, thereby introducing systematic measurement errors.

[0107] In this embodiment, when the clamping member 220 clamps the motor housing 130, the motor housing 130 is placed between the first plane 211 and the second plane 212, with the two adjacent outer sides of the motor housing 130 facing the first plane 211 and the second plane 212, respectively. Subsequently, the clamping member 220 slides along the second direction toward the first corner, so that the second corner gradually approaches the other two adjacent outer sides of the motor housing 130.

[0108] As the clamping member 220 continues to advance, the first pressing surface 221 forms a surface contact with one outer side of the motor housing 130, while the second pressing surface 222 forms a surface contact with another adjacent outer side of the motor housing 130. Under the pushing force of the clamping member 220, the motor housing 130 is pressed as a whole towards the first corner, and finally, the four outer sides of the motor housing 130 achieve close surface contact with the first plane 211, the second plane 212, the first pressing surface 221, and the second pressing surface 222, respectively.

[0109] Surface contact has a self-positioning effect. As the motor housing 130 is tightly wrapped by the four surfaces, its spatial orientation is passively corrected until its adjacent right-angled surfaces completely coincide with the reference right-angled surfaces of the fixture 200. In this way, the orientation of the motor 100 is precisely corrected, so that the motor 100 and its internal mounting position 201 are reliably placed in the preset position and orientation. This ensures that the first direction driven by the drive component 240 is parallel to the true axis of the mounting hole 101 of the motor carrier 110, providing an accurate geometric reference for determining the optimal focusing position of the lens 400 and ensuring assembly accuracy.

[0110] In one alternative embodiment, please refer to Figure 7 The mounting position 201 is a through hole penetrating the base 210. The clamping member 220 can extend into or out of the through hole along the second direction. The first plane 211 and the second plane 212 are both inner walls of the through hole. For example, the cross-section of the through hole can be approximately rectangular.

[0111] In this embodiment, the through hole serves as both an installation space for accommodating the motor 100 and its inner wall serves as a reference plane for correcting the attitude of the motor 100. The installation function and the positioning correction function are combined into one, so there is no need to set up an additional positioning block with a first plane 211 and a second plane 212 on the base 210.

[0112] In an optional embodiment, the drive unit 240 is also used to drive the lens 400 to rotate around the X-axis and Y-axis respectively, with the X-axis, Y-axis and the first direction being perpendicular to each other, thereby enabling tilt compensation of the lens 400 and further improving the installation accuracy of the lens 400.

[0113] For example, the drive unit 240 may include a multi-axis precision motion platform, which includes a Z-axis (first direction) linear motion module, a Y-axis rotation module, and an X-axis rotation module. The Z-axis linear motion module is used to drive the lens 400 to move along the first direction to acquire images of the target object 320 at different positions; the Y-axis rotation module and the X-axis rotation module are used to drive the lens 400 to rotate at small angles around the Y-axis and X-axis, respectively, to achieve precise correction of the tilt posture of the lens 400.

[0114] In one alternative embodiment, please refer to Figure 8 and Figure 10 The clamp 200 also includes a pressing member 230, which is movably disposed on the base 210 for pressing the motor carrier 110 against the motor base 120 in a first direction. For example, the pressing member 230 may be a resilient pin, a spring plunger, or a pneumatic push rod, etc.

[0115] After the motor carrier 110 is pressed against the motor base 120 along the first direction, the motor carrier 110 will not be displaced along with the movement of the lens 400. The position information of the lens 400 can accurately correspond to the real relative position of the lens 400 with respect to the motor carrier 110 and the image sensor 310, ensuring that the position coordinates of the lens 400 along the first direction corresponding to each frame of image are accurate. This allows the subsequently fitted first resolution curve to truly reflect the change law of image sharpness with the position of the lens 400, ensuring that the final obtained first position coordinates can accurately point to the actual optimal focus position.

[0116] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. A method for assembling a camera assembly, characterized in that, include: The motor (100) is placed in the mounting position (201) of the fixture (200), wherein the mounting position (201) is located between the image sensor (310) and the target (320) along a first direction; Insert the lens (400) into the motor carrier (110); Control the lens (400) to move along the first direction and acquire images of the target object (320) when the lens (400) is in different positions; Obtain the first resolution of the first marker point (321) on the target object (320) in multiple frames of the image; A first resolution curve is formed by fitting multiple first resolution forces. The horizontal axis of the first resolution curve is the position coordinate of the lens (400) along the first direction, and the vertical axis of the first resolution curve is the first resolution force. Obtain the coordinates of the first position corresponding to the vertex of the first analytical force curve; Adjust the lens (400) to the position indicated by the first position coordinates; The lens (400) is fixed to the motor carrier (110).

2. The assembly method according to claim 1, characterized in that, The first marker point (321) is located on the optical axis of the lens (400).

3. The assembly method according to claim 1 or 2, characterized in that, The target object (320) also has a plurality of second marker points (322), which are arranged around the first marker point (321), and include the following steps before the step of fixing the lens (400) to the motor carrier (110): Obtain the planar coordinates of the first marker point (321) and the plurality of second marker points (322) on the vertical plane of the first direction; The resolution of each of the second marker points (322) in the multiple frames of the image is obtained respectively; Multiple analytical force curves are formed by fitting multiple analytical forces based on each of the second marker points (322); Obtain the second position coordinates corresponding to the vertex of the analytical force curve of each of the second mark points (322); A virtual plane is formed by fitting the planar coordinates of the first marker point (321) and the first position coordinates, as well as the planar coordinates of each of the second marker points (322) and the corresponding second position coordinates; Obtain the tilt angle of the virtual plane relative to the vertical plane of the first direction; The lens (400) is rotated based on the tilt angle so that the optical axis of the lens (400) is parallel to the first direction.

4. The assembly method according to claim 3, characterized in that, The step of obtaining the tilt angle of the virtual plane relative to the vertical plane of the first direction includes: Obtain the plane equation of the virtual plane, which is Z = aX + bY + c, where a and b are both slopes; The first tilt angle of the lens (400) around the Y-axis is calculated based on the slope a, and the second tilt angle around the X-axis is calculated based on the slope b. The X-axis, Y-axis and the first direction are perpendicular to each other. The step of controlling the rotation of the lens (400) based on the tilt angle includes: The lens (400) is controlled to rotate around the Y-axis according to the first tilt angle; The lens (400) is controlled to rotate around the X-axis according to the second tilt angle.

5. The assembly method according to claim 3, characterized in that, The target object (320) has multiple corners (323), and each of the second marking points (322) is distributed on each of the corners (323).

6. The assembly method according to claim 1, characterized in that, The step of controlling the lens (400) to move along the first direction and acquiring images of the target object (320) at different positions of the lens (400) further includes: The motor carrier (110) is pressed against the motor base (120) along the direction of the lens (400) axis.

7. The assembly method according to claim 1, characterized in that, The procedure further includes, prior to the step of controlling the lens (400) to move along the first direction and acquiring images of the target object (320) at different positions of the lens (400): Apply adhesive to the mating area of ​​the lens (400) and / or the motor carrier (110); The step of fixing the lens (400) to the motor carrier (110) includes: The adhesive is cured to fix the lens (400) to the motor carrier (110).

8. The assembly method according to claim 7, characterized in that, The step of applying adhesive to the mating area of ​​the lens (400) and / or the motor carrier (110) further includes: Control the lens (400) to rotate about its own axis relative to the motor carrier (110).

9. The assembly method according to claim 1, characterized in that, The motor carrier (110) is provided with a stop (111), and the lens (400) is provided with a limiting part (411). The stop (111) can stop the limiting part (411) to restrict the lens (400) from moving relative to the motor carrier (110) toward the light-emitting side of the lens (400). When the lens (400) is located at the position indicated by the first position coordinate, there is a gap between the stop (111) and the limiting part (411).

10. The assembly method according to claim 9, characterized in that, The lens (400) includes a first lens portion (410) disposed near its own light-incident side and a second lens portion (420) disposed near its own light-out side. The diameter of the second lens portion (420) is larger than the diameter of the first lens portion (410), and the limiting portion (411) is disposed on the first lens portion (410). The motor carrier (110) has a mounting hole (101) for inserting the lens (400). The mounting hole (101) is provided with a stop (111). The stop (111) can stop the second lens (420) to restrict the movement of the lens (400) relative to the motor carrier (110) toward the light-incident side of the lens (400). When the lens (400) is located at the position indicated by the first position coordinate, there is a gap between the stop (111) and the second lens (420).

11. The assembly method according to claim 10, characterized in that, The stop portion (111) extends circumferentially along the mounting hole (101), and the stop portion (111) is provided with a clearance opening (1111) for the limiting portion (411) to pass through. The stop portion (111) is also provided with a plurality of glue injection ports (1112) distributed circumferentially along the mounting hole (101). Along the circumferential direction of the mounting hole (101), the size of the glue injection port (1112) is smaller than the size of the clearance opening (1111).

12. A clamp (200), characterized in that, The assembly method applied to any one of claims 1 to 11, wherein the fixture (200) comprises: The substrate (210) has the mounting position (201) provided on it. A clamping member (220) is movably disposed on the base (210) for clamping or releasing the motor housing (130). A drive element (240) is movably disposed on the base (210) for driving the lens (400) to move along the first direction.

13. The clamp (200) according to claim 12, characterized in that, The clamping member (220) and the base (210) slide in a second direction to clamp or release the motor housing (130), the second direction being perpendicular to the first direction; The base (210) includes a first plane (211) and a second plane (212) that are perpendicular to each other, and a first corner is formed between the first plane (211) and the second plane (212). The clamping member (220) includes a first extrusion surface (221) and a second extrusion surface (222) that are perpendicular to each other, and a second corner is formed between the first extrusion surface (221) and the second extrusion surface (222). The first corner and the second corner are disposed opposite to each other along the second direction. The first plane (211), the second plane (212), the first extrusion surface (221) and the second extrusion surface (222) are all used to contact the surface of the motor housing (130).

14. The clamp (200) according to claim 13, characterized in that, The mounting position (201) is a through hole penetrating the base (210), and the clamping member (220) can extend into or out of the through hole along the second direction. The first plane (211) and the second plane (212) are both inner walls of the through hole.

15. The clamp (200) according to claim 12, characterized in that, The drive unit (240) is also used to drive the lens (400) to rotate around the X-axis and Y-axis respectively, wherein the X-axis, Y-axis and the first direction are perpendicular to each other.

16. The clamp (200) according to claim 12, characterized in that, The clamp (200) further includes a pressing member (230), which is movably disposed on the base (210) for pressing the motor carrier (110) against the motor base (120) along the first direction.

Images