A lens module AA assembly system and assembly method

Abstract

The present application relates to the technical field of lens assembly, and particularly relates to a lens module AA assembly system and an assembly method. The lens module AA assembly system comprises an image sensor bearing device, a lens bearing device, a core adjusting device, a collimator device and a picture card device. The image sensor bearing device comprises an image sensor fixing device and a testing device, and the image sensor is fixed through the image sensor fixing device. The lens is carried through the lens bearing device. The core adjusting device is provided with a relay lens. The lens module, the core adjusting device, the collimator device and the picture card device are sequentially arranged from bottom to top. The lens module AA assembly system has the advantages of simple operation, wide application range and high efficiency.

Description

Technical Field

[0001] This invention relates to the field of lens assembly technology, and more particularly to a lens module AA assembly system and assembly method. Background Technology

[0002] Lenses are precision instruments widely used in various fields, such as laptops, mobile phones, tablets, and LiDAR. As precision instruments, they have very strict requirements from design to production to assembly. Otherwise, quality problems will greatly affect the quality of image acquisition and fail to meet user requirements. To enable lenses to acquire high-quality images, lens design typically assembles multiple lens elements and other components within the lens barrel. However, due to manufacturing and assembly errors, the more components assembled, the lower the precision of the assembled lens. This results in the sharpest point in the image being off-center and uneven sharpness at the corners. Therefore, when assembling a lens and sensor into a lens module, active alignment (AA) technology is needed to adjust the angle and position of the lens relative to the sensor. This ensures that the imaging surface of the lens and the imaging surface of the sensor are completely aligned in space before acquiring the image. Based on the acquired image, the MTF (Modulation Transfer Function) curve is derived using the sensor's built-in algorithm, thereby determining whether the quality of the lens assembly meets the design requirements.

[0003] Currently, various lens manufacturers possess equipment for assembling image sensors and lenses. For instance, Chinese invention patent CN117641082B discloses an automatic alignment device for vehicle-mounted cameras, comprising a worktable, a material transfer assembly, a dispensing device, and an alignment device. The material transfer assembly includes an assembly table and a transfer table. The camera lens mount is placed on the assembly table at the first loading station via a loading machine and then moves to the dispensing and alignment stations via the material transfer assembly. The camera lens is placed on the transfer table at the second loading station via a loading machine and then moves to the alignment station via the material transfer assembly. The alignment device includes a first alignment moving assembly, a second alignment moving assembly, and an alignment optical module. At the alignment station, the second alignment moving assembly places the lens on the already dispensed lens mount. The second alignment moving assembly and the first alignment moving assembly cooperate to align the lens and lens mount. For example, the AA alignment equipment in this patent is more suitable for assembling wide-angle lenses. By integrating the repeater and the chart, the image captured by this lens is more accurate in both the peripheral and central positions. Similarly, there is a method that uses a repeater and chart to test the MTF curve of narrow-angle lenses. However, neither of these devices can simultaneously test the MTF curves of narrow-angle and wide-angle lenses without changing the repeater and chart. When a production line switches from producing narrow-angle lenses to wide-angle lenses (or vice versa), the repeater + chart (the collimator's frame) needs to be removed, and a frame with the collimator (repeater + chart) needs to be installed. This operation is complex, applicable to only a limited range of lenses, and has low assembly efficiency. Summary of the Invention

[0004] In view of this, the present invention aims to provide a lens module AA assembly system, which adopts the method of simultaneously setting up a pattern card, a repeater lens and a collimator on the same device, and collecting pattern card patterns of different ranges for lenses with different field of view. This solves the problems of repeatedly switching between two devices, namely the collimator frame and the repeater lens + pattern card, when assembling narrow-angle and wide-angle lenses for lenses with different field of view. This results in complicated operation, limited applicability to a single type of lens, and low assembly efficiency.

[0005] To address the above problems, the present invention provides a lens module AA assembly system, comprising:

[0006] An image sensor carrier device is movable along a track set in the X-axis direction. The image sensor carrier device includes an image sensor fixing device and a testing device. The image sensor is fixed by the image sensor fixing device, and the image sensor is triggered to switch between a working state and a working state by the testing device.

[0007] The lens carrier device can move along the X-axis on the same track as the image sensor carrier device, and carries the lens through the lens carrier device;

[0008] The alignment device is equipped with a relay lens and a lens clamping device, through which a lens and an image sensor are assembled to form a lens module;

[0009] A collimator device, comprising multiple evenly distributed collimators;

[0010] A graphics card device includes a graphics card, the graphic surface of which is opposite to the lens module;

[0011] The lens module, the alignment device, the collimator device, and the image card device are arranged sequentially from bottom to top.

[0012] Furthermore, the graphics card device includes:

[0013] The drawing card support device and the lifting support device support the drawing card support device, and adjust the position of the drawing card support device in the Z-axis direction through the lifting support device, and carry the drawing card through the drawing card support device;

[0014] The graphic card carrier device includes a graphic card carrier plate, the graphic card carrier plate has a central hole, and the pattern of the graphic card is located within the area of ​​the central hole of the carrier plate.

[0015] Furthermore, the drawing card and the drawing card support plate are hinged together by a hinge mechanism, which includes a first hinge mechanism and a second hinge mechanism.

[0016] The drawing card is rotatably connected to the drawing card support plate via the first hinge mechanism;

[0017] The drawing card changes the angle between itself and the drawing card support plate via the second hinge mechanism.

[0018] Furthermore, the second hinge mechanism is a nitrogen spring, which includes a piston rod and a sleeve. The piston rod is telescopically connected to the sleeve, the piston rod is hinged to the drawing card, and the sleeve is hinged to the drawing card support plate.

[0019] Furthermore, when the drawing card is fastened to the drawing card support plate, the hinge position between the piston rod and the drawing card is lower than the hinge position between the sleeve and the drawing card support plate;

[0020] Under the action of nitrogen gas, the piston rod extends downward from the sleeve, applying a pressing force to the drawing card, thereby achieving self-locking between the drawing card and the drawing card support plate.

[0021] Furthermore, the lifting support device includes a lifting mechanism and a guiding mechanism;

[0022] The lifting mechanism includes at least two lifting components, which are respectively connected to two points on the drawing support plate. Each lifting component includes a first lifting member and a second lifting member. The first lifting member is connected to the drawing support plate and can move relative to the second lifting member along the Z-axis.

[0023] At least one guiding mechanism is provided. The guiding mechanism is a light rod that passes through the chart support plate. The chart support plate and the light rod are slidably connected along the Z-axis.

[0024] Furthermore, the two lifting components are an active lifting component and a driven lifting component, and the active lifting component and the driven lifting component are connected by a linkage mechanism;

[0025] The active lifting assembly also includes a motor, which is connected to the second lifting component;

[0026] The linkage mechanism includes two pulleys, a tension pulley, and a timing belt. The two pulleys are respectively connected to the second lifting component of the active lifting assembly and the driven lifting assembly, and the timing belt is connected to the two pulleys and the tension pulley.

[0027] Furthermore, the parallel light tube device includes a lamp holder with a central hole, the central hole being no smaller than the central hole of the support plate, and the first lifting component and the light rod passing through the lamp holder respectively;

[0028] Multiple arc-shaped holes are evenly arranged around the central hole of the lamp holder, and the parallel light tube is slidably connected to the lamp holder and the arc-shaped holes through a connecting mechanism;

[0029] Set a lamp holder scale around the arc-shaped hole;

[0030] The collimator can slide up and down along the connecting mechanism.

[0031] Furthermore, the connecting mechanism includes a body, a slider, and a fixing frame. The slider is fixed on the body and is slidably connected to the arc-shaped hole. The body is perpendicular to the lamp holder and has an arc-shaped slide rail. The fixing frame is slidably connected to the slide rail.

[0032] The mounting bracket includes a fixed end for the optical tube and a connecting end. The parallel optical tube is connected to the fixed end for the optical tube and is slidably fixed on the arc-shaped slide rail of the main body through the connecting end.

[0033] An arc-shaped scale is provided on the main body near the arc-shaped slide rail, and a fixed frame pointer is provided at the connecting end. The angle of the collimator is displayed by the position indicated by the fixed frame pointer on the main body scale.

[0034] The slider is equipped with a lamp holder pointer, which indicates the position of the collimator on the lamp holder by pointing to the lamp holder scale.

[0035] Furthermore, the lens clamping device includes a clamping mechanism, which is driven by a multi-axis adjustment mechanism to achieve multiple degrees of freedom of movement. The multi-axis adjustment mechanism can be a 5-axis drive mechanism or a 6-axis drive mechanism.

[0036] The core-adjusting device also includes:

[0037] Curing equipment, including a curing lamp holder, wherein the curing lamp holder is driven to move along the Z-axis direction by the Z-axis drive component of the multi-axis adjustment mechanism, and multiple curing lamps are fixed on the curing lamp holder;

[0038] The relay mirror is positioned above the curing device and can move along the Z-axis.

[0039] A lens module AA assembly method, comprising assembling a lens module using the lens module AA assembly system described in any one of the above claims, the assembly method comprising:

[0040] S100, Plasma cleaning of the bonding surfaces of the image sensor and lens;

[0041] S110. The shape of the plasma flame is monitored in real time by a vision camera to ensure that the plasma cleaning effect meets the design requirements.

[0042] S120: The plasma flame forms a ring-shaped or rectangular flame that moves around the adhesive surface and is consistent with the adhesive surface, thus completing the plasma cleaning.

[0043] S200: Apply adhesive to the bonding surface of the image sensor and use a vision camera equipped with a supplementary light source to photograph the adhesive and detect the quality of the adhesive.

[0044] The detection method for detecting whether there is dirt on the image sensor includes: starting the image sensor into working mode through the test device, putting it into light-sensitive state and starting exposure, and using the supplementary light source of the vision camera to uniformly illuminate the image sensor so that it generates an exposed image;

[0045] By analyzing whether there are dark spots or shadows in fixed positions in the image, it can be determined whether there is dirt on the photosensitive surface of the image sensor;

[0046] S300, assembling image sensor and lens;

[0047] S310. Load the image sensor onto the image sensor fixing device and load the lens onto the lens carrying device;

[0048] S320: Move the lens carrier device to the bottom of the alignment device, clamp the lens using the clamping mechanism, and retract the lens carrier device to the outside of the alignment device.

[0049] S330, the image sensor carrier moves to the bottom of the alignment device, and the clamping mechanism pre-assembles the lens and image sensor to form a pre-assembled lens module.

[0050] S340. The pre-installed lens module is activated through the testing device, so that the image sensor enters the working state;

[0051] S350, acquire the image card;

[0052] S351. If the field of view of the pre-installed lens module is within 120°, the image of the image card will be directly acquired.

[0053] S352. If the field of view of the pre-installed lens module exceeds 120°, then acquire the image of the chart card and the image of the chart card within the range of the collimator.

[0054] S360: Based on the acquired image, the MTF curve is obtained through the built-in algorithm of the image sensor. Based on the MTF curve, the multi-axis adjustment mechanism adjusts the position and angle of the lens relative to the image sensor.

[0055] S370, The adhesive is cured by a curing lamp;

[0056] The S400 image sensor carrier equipment transfers the assembled lens module to the lens carrier equipment, which then transmits the lens module to the next machine.

[0057] Compared with existing technologies, the lens module AA assembly system of the present invention has the following advantages:

[0058] The advantage of this technical solution is that it uses the same device to simultaneously set up the chart, repeater, and collimator. Different chart patterns are collected for lenses with different field of view. When assembling narrow-angle and wide-angle lenses, there is no need to repeatedly switch between the installation of collimator frame and repeater + chart for different field of view lenses. This simplifies the operation, has a wide range of applications, and is highly efficient. Attached Figure Description

[0059] Figure 1 This is a perspective view of the lens module AA assembly system described in an embodiment of this application;

[0060] Figure 2This is a perspective view of the lens module AA assembly system described in an embodiment of this application;

[0061] Figure 3 This is a perspective view of the card device described in the embodiments of this application;

[0062] Figure 4 This is a perspective view of the drawing card device described in an embodiment of this application;

[0063] Figure 5 This is a perspective view of the collimator device described in an embodiment of this application;

[0064] Figure 6 This is a perspective view of the connecting mechanism described in an embodiment of this application;

[0065] Figure 7 This is a perspective view of the core-adjusting device described in an embodiment of this application;

[0066] Figure 8 This is a perspective view of the core-adjusting device described in an embodiment of this application;

[0067] Figure 9 This is a perspective view of the image sensor carrying device described in an embodiment of this application;

[0068] Figure 10 This is a perspective view of the lens-carrying device described in an embodiment of this application.

[0069] Explanation of reference numerals in the attached figures:

[0070] 100-Image sensor carrier, 110-Image sensor fixture, 200-Lens carrier, 210-Fixed base, 300-Center alignment device, 310-Relay lens, 320-Curing lamp, 330-Clamping mechanism, 340-Multi-axis adjustment mechanism, 400-Graphic card device, 410-Graphic card carrier, 411-Graphic card carrier plate, 412-Second hinge mechanism, 413-First hinge mechanism, 420-Lifting mechanism, 430 -Guiding mechanism, 440-Linkage mechanism, 500-Collider device, 510-Collider, 520-Lamp holder, 530-Connecting mechanism, 531-Body, 532-Fixed bracket, 5321-Fixed end, 5322-Connecting end, 53221-Fixed bracket pointer, 533-Slider, 5331-Lamp holder pointer, 600-Graphic card, 700-Transfer device, 800-Lens module, 810-Image sensor, 820-Lens. Detailed Implementation

[0071] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0072] In this invention, the terms "first," "second," "upper," and "lower," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," "upper," or "lower" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. Where the technical solutions of the embodiments can be combined, they are all within the scope of protection claimed by this invention.

[0073] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0074] like Figure 1 and Figure 2 As shown, a lens module AA assembly system includes: an image sensor carrier device 100, a lens carrier device 200, a core alignment device 300, a collimator device 500, and a graphics card 600 device 400.

[0075] The image sensor carrier device 100 can move along a track set in the X-axis direction. The image sensor carrier device 100 includes an image sensor fixing device and a testing device. The image sensor 810 is fixed by the image sensor fixing device, and the image sensor 810 is triggered to switch between a working state and a stopped working state by the testing device.

[0076] The lens carrier device 200 can move along the X-axis on the same track as the image sensor carrier device 100, and the lens 820 is carried by the lens carrier device 200.

[0077] The alignment device 300 is equipped with a relay lens 310 and a lens clamping device, and the lens 820 and the image sensor 810 are assembled through the lens clamping device to form a lens module 800.

[0078] The collimator device 500 includes multiple evenly distributed collimators 510.

[0079] The graphics device 400 includes a graphics card 600, the graphic surface of which is opposite to the lens module 800.

[0080] The lens module 800, the alignment device 300, the collimator device 500, and the image card device 400 are arranged sequentially from bottom to top.

[0081] The image sensor carrier 100 and the lens carrier 200 are mounted on the same X-axis track to facilitate the assembly of the image sensor 810 and the lens 820. During assembly, to ensure the correct relative position and angle between the image sensor 810 and the lens 820, image acquisition is performed on the image card 600. During image acquisition, a testing device triggers the image sensor 810 to enter working mode and exposes the image card 600. When assembling the image sensor 810 and the lens 820, the lens 820 is clamped by the lens clamping device on the alignment device 300 and mounted on the image sensor 810. Before formal installation, to adjust the correct position of the lens 820 and the image sensor 810, pre-assembly is performed. That is, after assembling the lens 820 and the image sensor 810, the relative position and angle of the image sensor 810 and the lens 820 are adjusted before adhesive curing, completing the final assembly step. During the adjustment process, images from the image sensor 600 need to be acquired to obtain the MTF curve. Adjustments are then made based on this curve to ensure the relative position and angle of the lens 820 and image sensor 810 meet design requirements. For different field-of-view angles, the lens 820 can acquire images from the image sensor 600 separately. For example, for a narrow-angle lens, the entire image of the image sensor 600 needs to be acquired; for a wide-angle lens, the entire image of the image sensor 600 needs to be acquired, along with images within the range of the collimator 510. Furthermore, narrow-angle lenses are suitable for shooting objects at greater distances, wide-angle lenses for shooting objects at moderate distances, and ultra-wide-angle lenses for shooting objects at closer distances. Because narrow-angle lenses have a longer imaging distance, if the lens module 800 uses real-world image capture of the image sensor 600 to measure the MTF curve, the image sensor 600 cannot be integrated into the lens module AA assembly machine (the distance between the image sensor 600 and the lens module 800 is too close, and the focus exceeds the depth of field, making it impossible to focus on the lens module 800). Therefore, a relay lens 310 is needed to assist in image acquisition. The repeater lens 310 works by generating a virtual image of the near-range image card 600 at a greater distance, thus enabling large-distance detection in a small space. This allows the image card 600 to be integrated into the lens module AA assembly machine, enabling image acquisition by the lens module 800. The lens module AA assembly system described above can simultaneously detect and assemble both narrow-angle and wide-angle lenses without requiring the replacement of assembly components, simplifying operation, broadening its applicability, and increasing efficiency.

[0082] Furthermore, such as Figure 3 As shown, the drawing card device 400 includes: a drawing card carrying device 410 and a lifting support device. The lifting support device supports the drawing card carrying device 410 and adjusts the position of the drawing card carrying device 410 in the Z-axis direction. The drawing card carrying device 410 carries the drawing card 600.

[0083] The graphic card carrier device 410 includes a graphic card carrier plate 411, which has a central hole, and the pattern of the graphic card 600 is located within the central hole of the carrier plate.

[0084] The image card 600 is supported by an image card carrier plate 411, which has a central hole to allow the lens 820 to capture all patterns on the image card 600. To ensure clear focusing and accommodate different lens modules 800, the distance between the image card 600 and the lens module 800 needs to be adjusted appropriately. A lifting support device is provided to both adjust the distance between the image card carrier plate 411 and the lens module 800 and to adjust the height of the image card 600.

[0085] Furthermore, such as Figure 4 As shown, the drawing card 600 is hinged to the drawing card support plate 411 via a hinge mechanism, which includes a first hinge mechanism 413 and a second hinge mechanism 412. The drawing card 600 is rotatably connected to the drawing card support plate 411 via the first hinge mechanism 413. The angle between the drawing card 600 and the drawing card support plate 411 can be changed via the second hinge mechanism 412.

[0086] The first hinge mechanism 413 is used for connection with the drawing card 600, and the drawing card 600 can rotate around the edge of the connection. Preferably, the first hinge mechanism 413 is a hinge, and the number of hinges is at least two, preferably two hinges. The second hinge mechanism 412 is used to adjust the angle between the drawing card 600 and the drawing card support plate 411, and can fix the drawing card 600 at any angle.

[0087] Specifically, the second hinge mechanism 412 is a nitrogen spring, which includes a piston rod and a sleeve. The piston rod is telescopically connected to the sleeve, the piston rod is hinged to the drawing card 600, and the sleeve is hinged to the drawing card support plate 411.

[0088] The length of the piston rod's extension and retraction is adjusted by regulating the amount of gas inside the sleeve, thereby adjusting the angle between the drawing card 600 and the drawing card support plate 411. Simultaneously, by maintaining a constant amount of gas inside the sleeve after adjusting the angle, the drawing card 600 can be kept fixed at the adjusted angle.

[0089] Furthermore, the lifting support device includes a lifting mechanism 420 and a guiding mechanism 430.

[0090] The lifting mechanism 420 includes at least two lifting components, which are respectively connected to two locations on the drawing support plate 411. Each lifting component includes a first lifting member and a second lifting member. The first lifting member is connected to the drawing support plate 411 and can move relative to the second lifting member along the Z-axis.

[0091] At least one guide mechanism 430 is provided. The guide mechanism 430 is a light rod that passes through the chart support plate 411. The chart support plate and the light rod are slidably connected along the Z-axis.

[0092] The guide mechanism 430 is a guide rod fixed on the base of the equipment. The guide rod passes through the drawing card support plate 411, and the drawing card support plate 411 slides up and down along the guide rod to ensure that the drawing card support plate 411 does not deflect at an angle during the lifting process. The drawing card support plate 411 is driven to lift and lower by the lifting mechanism 420. Taking a rectangular drawing card 600 as an example, the corresponding drawing card support plate 411 is also rectangular. A set of lifting components can be set at two opposite corners of the drawing card support plate 411. The second lifting component can be a fixed component fixed on the base. The first lifting component moves up and down relative to the second lifting component through a cooperative relationship, thereby realizing the adjustment of the height of the drawing card support plate 411. The mechanism composed of the first lifting component and the second lifting component can adopt any mechanism of the prior art, such as a screw and nut mechanism, a gear and rack mechanism, etc. Preferably, a bracket is fixed on the base, and a motor is set at the lower part of the bracket. The motor spindle is connected to a screw, and the rotation of the motor spindle drives the screw to rotate. The first lifting component can be a nut, with a lead screw engaging with it. The nut is fixed to the drawing support plate 411. The rotation of the lead screw drives the nut to move along the upper line of the lead screw, causing the drawing support plate 411 to move up and down. Both the smooth rod and the lead screw, which serves as the second lifting component, can be mounted on a bracket. For a rectangular drawing support plate 411, the guide mechanism 430 can be located at the four corners of the drawing support plate 411.

[0093] Furthermore, the two lifting components are an active lifting component and a driven lifting component, which are connected by a linkage mechanism 440. The active lifting component also includes a motor, which is connected to the second lifting member. The linkage mechanism 440 includes two pulleys, a tension pulley, and a synchronous belt. The two pulleys are respectively connected to the first lifting member of the active lifting component and the driven lifting component, and the synchronous belt is connected to the two pulleys and the tension pulley.

[0094] In one implementation, the lifting mechanism 420 is equipped with two lifting components, respectively positioned diagonally opposite each other on the rectangular drawing plate support plate 411. To ensure that the drawing plate support plate 411 remains horizontal during lifting, a motor is used for both lifting components. One motor drives one lifting component, which in turn drives the other lifting component to move synchronously via a linkage mechanism 440. Specifically, taking a two-set screw-nut mechanism as an example, after each screw passes through the drawing plate support plate 411 and exits through the nut, a pulley is fixed at its end. The two pulleys are connected by a synchronous belt. The motor drives the screw of the active lifting component to rotate, which in turn drives the screw of the driven lifting component to rotate synchronously via the pulley. The two sets of nuts cause the drawing plate support plate 411 to move up and down in a horizontal position. To prevent the synchronous belt from slipping and causing the two screws to not rotate synchronously, a tensioning pulley is provided between the two pulleys to keep the synchronous belt always taut, increasing the friction between the synchronous belt and the pulley. Preferably, the synchronous belt can be a toothed synchronous belt, and the pulleys can be toothed pulleys.

[0095] Furthermore, such as Figure 5 As shown, the collimator device 500 includes a lamp holder 520 with a central hole. This central hole is not smaller than the central hole of the support plate. A first lifting member and a light rod pass through the lamp holder 520. Multiple arc-shaped holes are evenly distributed around the central hole of the lamp holder 520. The collimator 510 is slidably connected to the lamp holder 520 and the arc-shaped holes via a connecting mechanism 530. A scale is provided around the arc-shaped holes. The collimator 510 can slide up and down along the connecting mechanism 530.

[0096] As one embodiment, the lamp holder 520 is plate-shaped, with a waist-shaped hole at its center. This waist-shaped hole is larger than the center hole of the supporting plate to prevent the lamp holder 520 from obscuring the pattern on the graphic card 600. Four arc-shaped holes are provided near the four corners of the waist-shaped hole, and four parallel light tubes 510 are respectively fixed to these four arc-shaped holes. The position of the parallel light tubes 510 is adjusted by sliding them through the arc-shaped holes. The corresponding positions of the four parallel light tubes 510 are determined by a scale on the lamp holder 520, ensuring that the four parallel light tubes 510 project uniform light.

[0097] Furthermore, such as Figure 6As shown, the connecting mechanism 530 includes a body 531, a slider 533, and a fixing frame 532. The slider 533 is fixed to the body 531 and is slidably connected to the arc-shaped hole. The body 531 is perpendicular to the lamp holder 520 and has an arc-shaped slide rail. The fixing frame 532 is slidably connected to the slide rail. The fixing frame 532 includes a light tube fixing end 5321 and a connecting end 5322. The collimator 510 is connected to the light tube fixing end 5321 and is slidably fixed to the arc-shaped slide rail of the body 531 through the connecting end 5322. An arc-shaped body scale is provided on the body 531 near the arc-shaped slide rail, and a fixing frame pointer 53221 is provided on the connecting end 5322. The angle of the collimator 510 is displayed by the fixing frame pointer 53221 indicating the position on the body scale. A lamp holder pointer 5331 is provided on the slider 533. The position of the collimator 510 on the lamp holder 520 is indicated by the position indicated by the lamp holder pointer 5331 on the scale of the lamp holder 520.

[0098] The curved slide rail is preferably a through hole with the same arc shape located near the periphery of the fixing frame 532. Through the cooperation between the lamp holder 520 and the connecting mechanism 530, the fixed position and fixed angle of the parallel light tube 510 are effectively realized.

[0099] Furthermore, such as Figure 7 and Figure 8 As shown, the lens clamping device includes a clamping mechanism 330, which is driven by a multi-axis adjustment mechanism 340 to achieve multiple degrees of freedom of movement. The multi-axis adjustment mechanism 340 can be a 5-axis drive mechanism or a 6-axis drive mechanism.

[0100] The core-adjusting device 300 further includes a curing device, comprising a curing lamp holder, which is driven to move along the Z-axis direction by the Z-axis drive component of the five-axis adjustment mechanism. Multiple curing lamps 320 are fixed on the curing lamp holder. The repeater mirror 310 is positioned above the curing device and is movable along the Z-axis direction.

[0101] The alignment device 300 and / or the image sensor support mechanism are five-axis or six-axis adjustment mechanisms, meaning there are three ways to adjust the relative position of the lens 820 and the image sensor 810: 1. Keep the image sensor 810 stationary and adjust the position of the lens 820 (the alignment device 300 is a five-axis or six-axis adjustment mechanism); 2. Keep the lens 820 stationary and adjust the position of the image sensor 810 (the image sensor support mechanism is a five-axis or six-axis adjustment mechanism); 3. Adjust the positions of both the lens 820 and the image sensor 810 simultaneously (both the alignment device 300 and the image sensor support mechanism are five-axis or six-axis adjustment mechanisms).

[0102] The following describes, in a first manner, the adjustment of the relative positions of the lens 820 and the image sensor 810 using the lens module AA assembly system of this application.

[0103] The structure of the image sensor carrier device 100 is as follows: Figure 9 As shown, the image sensor carrying device 100 includes a lifting cylinder, and an image sensor clamp 110 for clamping the image sensor 810 is provided on the drive plate of the lifting cylinder.

[0104] Specifically, the structure of the lens-carrying device 200 is as follows: Figure 10 As shown, the lens carrying mechanism includes a lifting cylinder. The drive plate of the lifting cylinder is equipped with a fixing base 210 for placing the lens 820 and the assembled lens module 800. The top of the fixing base 210 has two receiving slots, in which the lens 820 and the assembled lens module 800 are respectively placed. The receiving slot for the lens module 800 has a clearance notch to provide clearance for the grippers that hold the lens module 800.

[0105] The structure of the core-adjusting equipment is as follows Figure 7 and Figure 8 As shown, the core-aligning device includes a Z-axis lifting slide, on which an XY-axis precision adjustment stage is mounted. A flat plate is mounted on the XY-axis precision adjustment stage, and a vertical plate is fixed to the flat plate. On the vertical plate are a rotating plate that can rotate around the X-axis and a rotary driver for driving the rotating plate. The rotary driver can be a worm gear or a rotary stepper motor. An angle adjuster that can rotate around the Y-axis is mounted on the rotating plate, and a clamping mechanism 330 for picking up the lens 820 is mounted on the angle adjuster. The angle adjuster can use a structure of convex spherical slider 533 and concave spherical slider 533 in cooperation, which will not be described in detail here. Driven by the multi-axis adjustment mechanism 340, the lens 820 of the clamping mechanism 330 can translate along the X, Y, and Z axes and rotate around the X and Y axes. The lens has five degrees of freedom, allowing for rapid adjustment of the angle and position of the lens 820 relative to the image sensor 810. The multi-axis adjustment mechanism 340 has a simple overall structure, occupies little machine space, and is very convenient to use.

[0106] Of course, an angle adjuster that rotates around the Z-axis can also be added to the angle adjuster that rotates around the Y-axis to achieve adjustment in six directions.

[0107] As one implementation method, the curing lamp 320 can be a UV lamp. A lifting adjustment cylinder is also provided on the upright plate, and a lamp holder 520 is connected to the drive plate of the lifting adjustment cylinder. Multiple UV lamps are fixed on the lamp holder 520. After the position and angle of the lens 820 relative to the image sensor 810 are adjusted, the adhesive on the bonding surface is cured by the UV lamp.

[0108] The assembly structure of the core-aligning device, UV lamp, and repeater 310 is as follows: Figure 7 As shown, a gantry is provided on the base, and an electric lead screw is provided on the gantry to drive the repeater 310 to move up and down, which is used to adjust the distance between the repeater 310 and the lens 820 (that is, the working distance of the repeater 310).

[0109] like Figure 2 As shown, the lens module AA assembly system of the present invention also includes a handling device 700, which includes a robotic arm connected to the base via a robotic arm. The robotic arm provides the robotic arm with six degrees of freedom. The robotic arm is used to pick up the lens 820 or the lens module 800 and transfer the lens 820 or the lens module 800 to other devices.

[0110] A lens module AA assembly method, comprising assembling a lens module using the lens module AA assembly system described in any one of the above claims, the assembly method comprising:

[0111] S100. Plasma cleaning is performed on the bonding surfaces of the image sensor and lens to enhance the wettability and adhesion of the bonding surfaces.

[0112] S110. The shape of the plasma flame is monitored in real time by a vision camera to ensure that the plasma cleaning effect meets the design requirements.

[0113] S120: The plasma flame forms a ring-shaped or rectangular flame that moves around the adhesive surface and is consistent with the adhesive surface, thus completing the plasma cleaning.

[0114] S200: Apply adhesive to the bonding surface of the image sensor and use a vision camera equipped with a supplementary light source to photograph the adhesive and detect the quality of the adhesive.

[0115] The detection method for detecting whether there is dirt on the image sensor includes: starting the image sensor into working mode through the test device, putting it into light-sensitive state and starting exposure, and using the supplementary light source of the vision camera to uniformly illuminate the image sensor so that it generates an exposed image;

[0116] By analyzing whether there are dark spots or shadows in fixed positions in the image, it can be determined whether there is dirt on the photosensitive surface of the image sensor;

[0117] S300, assembling image sensor and lens;

[0118] S310. Load the image sensor onto the image sensor fixing device and load the lens onto the lens carrying device;

[0119] S320: Move the lens carrier device to the bottom of the alignment device, clamp the lens using the clamping mechanism, and retract the lens carrier device to the outside of the alignment device.

[0120] S330, the image sensor carrier moves to the bottom of the alignment device, and the clamping mechanism pre-assembles the lens and image sensor to form a pre-assembled lens module.

[0121] S340. The pre-installed lens module is activated through the testing device, so that the image sensor enters the working state;

[0122] S350, acquire the image card;

[0123] S351. If the field of view of the pre-installed lens module is within 120°, the image of the image card will be directly acquired.

[0124] S352. If the field of view of the pre-installed lens module exceeds 120°, then acquire the image of the chart card and the image of the chart card within the range of the collimator.

[0125] S360: Based on the acquired image, the MTF curve is obtained through the built-in algorithm of the image sensor. Based on the MTF curve, the multi-axis adjustment mechanism adjusts the position and angle of the lens relative to the image sensor.

[0126] S370, The adhesive is cured by a curing lamp;

[0127] The S400 image sensor carrier equipment transfers the assembled lens module to the lens carrier equipment, which then transmits the lens module to the next machine.

[0128] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A lens module AA assembly system, characterized in that, include: The image sensor carrier device (100) can move along a track set in the X-axis direction. The image sensor carrier device (100) includes an image sensor fixing device and a testing device. The image sensor (810) is fixed by the image sensor fixing device, and the image sensor (810) is triggered to switch between a working state and a working state by the testing device. The lens carrier device (200) can move along the X-axis on the same track as the image sensor carrier device (100) and carry the lens (820). The alignment device (300) is equipped with a relay lens (310) and a lens clamping device, and the lens (820) and the image sensor (810) are assembled through the lens clamping device to form a lens module (800). A collimator device (500) includes multiple evenly distributed collimators (510). A graphics device (400) includes a graphics card (600) with its graphic surface facing the lens module (800); The graphics card device (400) includes: The drawing card support device (410) and the lifting support device support the drawing card support device (410) through the lifting support device, and adjust the position of the drawing card support device (410) in the Z-axis direction through the lifting support device, and carry the drawing card (600) through the drawing card support device (410). The graphic card carrier device (410) includes a graphic card carrier plate (411), the graphic card carrier plate (411) is provided with a central hole, and the pattern of the graphic card (600) is located within the range of the central hole of the carrier plate; The drawing card (600) and the drawing card support plate (411) are hinged together by a hinge mechanism, which includes a first hinge mechanism (413) and a second hinge mechanism (412). The drawing card (600) is rotatably connected to the drawing card support plate (411) via the first hinge mechanism (413); The drawing card (600) changes the angle between the drawing card (600) and the drawing card support plate (411) through the second hinge mechanism (412); The lens module (800), the alignment device (300), the collimator device (500), and the image card device (400) are arranged sequentially from bottom to top.

2. The lens module AA assembly system according to claim 1, characterized in that, The second hinge mechanism (412) is a nitrogen spring, which includes a piston rod and a sleeve. The piston rod is telescopically connected to the sleeve. The piston rod is hinged to the drawing card (600), and the sleeve is hinged to the drawing card support plate (411).

3. The lens module AA assembly system according to claim 2, characterized in that, When the drawing card (600) is fastened to the drawing card support plate (411), the hinge position of the piston rod and the drawing card (600) is lower than the hinge position of the sleeve and the drawing card support plate (411). Under the action of nitrogen, the piston rod extends downward from the sleeve and applies a pressing force to the drawing card (600), thereby achieving self-locking between the drawing card (600) and the drawing card support plate (411).

4. The lens module AA assembly system according to claim 3, characterized in that, The lifting support device includes a lifting mechanism (420) and a guiding mechanism (430). The lifting mechanism (420) includes at least two lifting components, which are respectively connected to two locations on the drawing support plate (411). Each lifting component includes a first lifting member and a second lifting member. The first lifting member is connected to the drawing support plate (411), and the first lifting member can move relative to the second lifting member along the Z-axis. At least one guide mechanism (430) is provided. The guide mechanism (430) is a light rod that passes through the card support plate (411). The card support plate (411) and the light rod are slidably connected along the Z-axis.

5. The lens module AA assembly system according to claim 4, characterized in that, The two lifting components are an active lifting component and a passive lifting component, and the active lifting component and the passive lifting component are connected by a linkage mechanism (440); The active lifting assembly also includes a motor, which is connected to the second lifting component; The linkage mechanism (440) includes two pulleys, a tensioning pulley and a timing belt. The two pulleys are respectively connected to the second lifting member of the active lifting assembly and the driven lifting assembly. The timing belt is connected to the two pulleys and the tensioning pulley.

6. The lens module AA assembly system according to any one of claims 1-5, characterized in that, The parallel light tube device (500) includes a lamp holder (520) with a central hole on the lamp holder (520). The central hole of the lamp holder is not smaller than the central hole of the support plate. The first lifting member and the light rod pass through the lamp holder (520) respectively. Multiple arc-shaped holes are evenly arranged around the central hole of the lamp holder. The parallel light tube (510) and the lamp holder (520) are slidably connected to the arc-shaped holes through the connecting mechanism (530). Set a lamp holder scale around the arc-shaped hole; The parallel light tube (510) can slide up and down along the connecting mechanism (530).

7. The lens module AA assembly system according to claim 6, characterized in that, The connecting mechanism (530) includes a body (531), a slider (533), and a fixing frame (532). The slider (533) is fixed on the body (531) and is slidably connected to the arc-shaped hole. The body (531) is perpendicular to the lamp holder (520). An arc-shaped slide rail is provided on the body (531), and the fixing frame (532) is slidably connected to the slide rail. The fixing frame (532) includes a light tube fixing end (5321) and a connecting end (5322). The parallel light tube (510) is connected to the light tube fixing end (5321) and is slidably fixed on the arc-shaped slide rail of the body (531) through the connecting end (5322). An arc-shaped body scale is provided on the body (531) near the arc-shaped slide rail, and a fixed frame pointer (53221) is provided on the connecting end (5322). The angle of the parallel light tube (510) is displayed by the fixed frame pointer (53221) at the indicated position on the body scale. A lamp holder pointer (5331) is provided on the slider (533), and the position of the collimator (510) on the lamp holder (520) is indicated by the lamp holder pointer (5331) on the lamp holder scale.

8. The lens module AA assembly system according to claim 1, characterized in that, The lens clamping device includes a clamping mechanism (330), which is driven by a multi-axis adjustment mechanism (340) to achieve multiple degrees of freedom of movement. The multi-axis adjustment mechanism (340) is a 5-axis adjustment mechanism or a 6-axis adjustment mechanism. The core-aligning device (300) also includes: The curing equipment includes a curing lamp holder, which is driven to move along the Z-axis direction by the Z-axis drive assembly of the multi-axis adjustment mechanism (340), and a plurality of curing lamps (320) are fixed on the curing lamp holder. The relay mirror (310) is positioned above the curing device and can move along the Z-axis.

9. A method for assembling a lens module AA, characterized in that, A method for assembling a lens module using the lens module AA assembly system as described in any one of claims 1-8, the assembly method comprising: S100, Plasma cleaning of the bonding surfaces of the image sensor and lens; S110. The shape of the plasma flame is monitored in real time by a vision camera to ensure that the plasma cleaning effect meets the design requirements. S120: The plasma flame forms a ring-shaped or rectangular flame that moves around the adhesive surface and is consistent with the adhesive surface, thus completing the plasma cleaning. S200: Apply adhesive to the bonding surface of the image sensor and use a vision camera equipped with a supplementary light source to photograph the adhesive and detect the quality of the adhesive. The detection method for detecting whether there is dirt on the image sensor includes: starting the image sensor into working mode through the test device, putting it into light-sensitive state and starting exposure, and using the supplementary light source of the vision camera to uniformly illuminate the image sensor so that it generates an exposed image; By analyzing whether there are dark spots or shadows in fixed positions in the image, it can be determined whether there is dirt on the photosensitive surface of the image sensor; S300, assembling image sensor and lens; S310. Load the image sensor onto the image sensor fixing device and load the lens onto the lens carrying device; S320: Move the lens carrier device to the bottom of the alignment device, clamp the lens using the clamping mechanism, and retract the lens carrier device to the outside of the alignment device. S330, the image sensor carrier moves to the bottom of the alignment device, and the clamping mechanism pre-assembles the lens and image sensor to form a pre-assembled lens module. S340. The pre-installed lens module is activated through the testing device, so that the image sensor enters the working state; S350, acquire the image card; S351. If the field of view of the pre-installed lens module is within 120°, the image of the image card will be directly acquired. S352. If the field of view of the pre-installed lens module exceeds 120°, then acquire the image of the map card and the image of the map card within the range of the collimator. S360: Based on the acquired image, the MTF curve is obtained through the built-in algorithm of the image sensor. Based on the MTF curve, the multi-axis adjustment mechanism adjusts the position and angle of the lens relative to the image sensor. S370, The adhesive is cured by a curing lamp; The S400 image sensor carrier equipment transfers the assembled lens module to the lens carrier equipment, which then transmits the lens module to the next machine.

Images