Lens module EOL detection device and method

Abstract

The invention relates to the technical field of lens module detection, in particular to lens module EOL detection equipment and method, and the equipment comprises a four-station turntable mechanism which is provided with a plurality of bearing test seats for placing lens modules after code scanning; and a plurality of functional modules arranged around the four-station turntable mechanism, wherein the functional modules comprise a surface light test module for optical test, a white field detection assembly, a collimator test module and a black field test assembly. By integrating a multi-station automatic detection process, multiple performance detections such as electrical test, definition, color, signal-to-noise ratio, FOV angle of view, COD decentration, white balance, dark corner, stain and black field of the lens module can be synchronously completed, the coverage of detection items is comprehensive, and compared with traditional equipment only performing white field or black field detection, the full-automatic lens module detection equipment has the advantages that the full-automatic lens module detection equipment is simple in structure and convenient to operate.

Description

Technical Field

[0001] This invention relates to the technical field of lens module testing, and particularly to a lens module EOL testing device and method. Background Technology

[0002] In the lens module manufacturing process, intrinsic parameter calibration and EOL (End of Line) testing are two key and complementary quality control steps. Although intrinsic parameter calibration calibrates the lens's imaging parameters, EOL testing remains indispensable. EOL testing verifies the lens module's robustness under non-ideal conditions by simulating real-world usage scenarios, ensuring that it continues to function stably in the hands of users.

[0003] Existing testing methods for lens modules only perform white or black field testing on camera modules. For example, CN115767083A discloses a final inspection method for camera module products, which includes the following steps: S1, placing the camera module product on a loading fixture; S2, fixing the camera module product with the loading fixture and powering it on; S3, moving the loading fixture, with the camera module product moving along with the loading fixture until the lens of the camera module product is facing the white field testing equipment; S4, the white field testing equipment provides sufficient light to cover the lens of the camera module product; S5, taking a picture of the camera module product. If there are black spots or black patches in the picture, the camera module product has internal dirt; if there are no black spots or black patches in the picture, the camera module product is qualified. However, this method cannot comprehensively reflect the quality of the lens module.

[0004] Publication No.: CN117528064A A final inspection device, method, apparatus, and storage medium for camera modules includes: a main support, a turntable, a white field detection module, a teleconverter module, and a black field detection module; the main support is equipped with a first test card, a second test card, and a light tube slide rail; the first test card is located at the top of the main support, and the light tube slide rail is located below the first test card; a parallel light tube that can slide along the light tube slide rail is provided on the light tube slide rail; the turntable is located below the main support, and the turntable has mounting positions for the camera modules; the white field detection module, the teleconverter support, and the black field detection module are arranged sequentially around the outside of the turntable; the teleconverter module includes a teleconverter support and a teleconverter. However, this solution has four functional modules set up separately, resulting in a complex structure.

[0005] In summary, there is an urgent need to design an EOL testing device and method for lens modules to address the problem that existing EOL testing devices for lens modules only perform white or black field testing on camera modules, resulting in a single testing item that cannot comprehensively reflect the actual quality problems of the lens module. Summary of the Invention

[0006] In view of this, the present invention aims to propose an EOL testing device and method for lens modules, which solves the problem that existing EOL testing devices for lens modules only perform white or black field testing on camera modules, resulting in a single testing item and failing to fully reflect the actual quality problems of the lens module.

[0007] The technical solution of this invention is implemented as follows: One object of the present invention is to disclose an EOL detection device for a lens module, comprising: A four-station turntable mechanism for transferring lens modules is provided, wherein the four-station turntable mechanism is provided with multiple load-bearing test seats to place the lens modules that have been scanned. The four-station turntable mechanism is surrounded by multiple functional modules, including a surface light testing module, a white field detection component, a collimator testing module, and a black field testing component for optical testing. The collimator testing module and the black field testing component are connected to the lens module at the same station of the four-station turntable mechanism to complete the collimator test and the black field test sequentially at that station.

[0008] Furthermore, the equipment also includes a cutting assembly, which is connected to the lens module at the same station of the four-station turntable mechanism as the white field detection assembly, so that the qualified product is cut out by the cutting assembly at that station.

[0009] Furthermore, the device also includes a Y-axis hopper mechanism and a loading / unloading robot. The loading / unloading robot is connected to a four-station turntable mechanism at the first station, and the Y-axis hopper mechanism is connected to the loading / unloading robot to provide the lens module to be tested.

[0010] Furthermore, the four-station turntable mechanism is also equipped with multiple buffer seats, which are configured one-to-one with the bearing test seats to temporarily store qualified lens modules so that they can be transferred to new lens modules to be tested.

[0011] Furthermore, the surface light testing module includes a height-adjustable image card lifting mechanism, a relay mirror module, and an image card. The relay mirror module is fixedly disposed directly below the image card lifting mechanism, and the image card is installed on the image card lifting mechanism and located above the relay mirror module. The map card lifting mechanism is used to drive the map card to move in the Z-axis direction to adjust its relative position with the relay mirror; The relay lens module serves as an optical relay element, used to construct the test optical path, enabling the lens module under test to clearly capture the test pattern on the chart through the relay lens, thereby completing the tests for sharpness, OC, color grayscale, SNR, and rotation.

[0012] Furthermore, the white field detection component includes a Z-axis lifting cylinder and a white light infrared integrating sphere light source; The drive end of the Z-axis lifting cylinder is connected to the white light infrared integrating sphere light source, and is used to drive the white light infrared integrating sphere light source to move in the Z-axis direction so that it descends to completely cover the lens module under test. The white light infrared integrating sphere light source is used to provide uniform and stable white light illumination, enabling the lens module under test to capture a standard white field image, thereby completing the testing of bright spots, dark spots, blemishes, white balance, vignetting, and AWB.

[0013] Furthermore, the collimator testing module includes a liftable collimator mechanism, an inclined collimator, and several FOV field-of-view testing targets. The collimator mechanism is used to drive the vertical collimator and the tilted collimator to move in the Z-axis direction so that they rise to dock with the lens module under test. The vertical collimator and the tilted collimator are used to provide a vertical collimated beam and a collimated beam at a specific angle, so that the lens module under test can capture the collimator image, thereby completing the sharpness and COD test. Several of the aforementioned FOV (Field of View) test targets are arranged around the collimator mechanism to complete the FOV test of the lens module under test.

[0014] Furthermore, the black field testing assembly includes a sliding cylinder, a lifting cylinder, and a light shield; The slide block of the slide cylinder is equipped with a light shield drive plate, and the slide cylinder is used to drive the light shield drive plate to move directly above the lens module under test. The lifting cylinder is fixed to the drive plate of the light shield, and its drive end is connected to the light shield. The lifting cylinder is used to drive the light shield to descend so that its bottom is tightly pressed against the bearing test seat. The light shield is used to create a completely dark testing environment, enabling the lens module under test to capture black field images without external light interference, thereby completing the tests for dark current, dead pixels, and white spots.

[0015] The second objective of this invention is to disclose a lens module EOL detection method using the lens module EOL detection equipment described above. The method includes the following steps: S1. The lens module to be tested is transferred to the area below the loading and unloading robot via the Y-axis hopper mechanism; S2. The loading and unloading robot grips the lens module to be tested and places it on the bearing test seat of the four-station turntable mechanism at the first station; S3. The four-station turntable mechanism drives the lens module to the second, third and fourth stations in sequence, and performs surface light test, white point test, parallel light tube test and black point test respectively. S4. After all tests are completed, the four-station turntable mechanism returns to the first station, and the loading and unloading robot moves the defective products back to the designated position of the Y-axis hopper mechanism according to the test results.

[0016] The third objective of this invention is to disclose a lens module EOL detection method using the lens module EOL detection equipment described above, the method comprising the following steps: T1. The cutting assembly from the previous process transfers the lens module to be tested to the area below the loading / unloading robot. T2. The loading and unloading robot picks up the lens module to be tested and places it on the bearing test seat of the four-station turntable mechanism at the first station. At the same time, the qualified products that have been tested in the previous cycle are moved from the bearing test seat to the buffer seat. T3. The four-station turntable mechanism drives the lens module under test to flow sequentially to the second, third and fourth stations to perform surface light test, white field test, parallel light tube test and black field test respectively. When the qualified products that have been tested in the previous cycle on the buffer seat flow to the third station along with the lens module under test, the cutting component picks up the qualified products on the buffer seat and transfers them to the next process equipment. T4. The four-station turntable mechanism returns to the first station. The loading and unloading robot places the newly completed qualified products on the empty buffer seat, moves the unqualified products back to the designated position of the Y-axis hopper mechanism, and places the new lens module to be tested on the empty load-bearing test seat to enter the next testing cycle.

[0017] Compared with the prior art, the lens module EOL detection device and method of the present invention have the following advantages: 1. This invention integrates a multi-station automated testing process, which can simultaneously complete multiple performance tests of the lens module, including electrical tests, sharpness, color, signal-to-noise ratio, FOV, COD center shift, white balance, vignetting, blemishes, and black levels. The testing items are comprehensive, and compared with traditional equipment that only performs white or black level testing, the testing completeness is improved, significantly enhancing the ability to evaluate the overall quality of the lens module.

[0018] 2. This invention adopts a four-station turntable mechanism and modular functional components in a coordinated layout. It innovatively reuses the collimator test and black field test in the same station, and the white field test and cutting components share the third station, thereby improving space utilization. At the same time, through the design of the liftable chart module, repeater lens and multi-angle adjustable collimator, it is compatible with various lens models with small and large field of view, making the equipment highly versatile and shortening the time for changeover and debugging.

[0019] 3. This invention achieves fully automated operation from material loading and unloading robots, barcode tracking system and buffered cutting components through linkage control, thereby improving the detection cycle time, reducing manual intervention and the labor cost per piece detection, effectively ensuring the consistency and stability of detection, and meeting the needs of high-capacity and high-yield industrial production. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a top view of the detection device of the present invention; Figure 2 This is a schematic diagram of the structure of the detection device of the present invention; Figure 3 This is a schematic diagram of the Y-axis hopper mechanism of the present invention; Figure 4 This is a schematic diagram of the loading and unloading robot of the present invention; Figure 5 This is a schematic diagram of the four-station turntable mechanism of the present invention; Figure 6 This is a schematic diagram of the surface light testing module structure of the present invention; Figure 7 This is a schematic diagram of the assembly of the drawing card and the drawing card mounting plate of the present invention; Figure 8 This is a schematic diagram of the combined structure of the cutting assembly and the white field detection assembly of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the parallel light tube test module of the present invention; Figure 10 This is a schematic diagram of the parallel light tube mechanism of the present invention; Figure 11 This is a schematic diagram of the structure of the parallel light tube support of the present invention; Figure 12 This is a schematic diagram of the structure of the black field testing component of the present invention.

[0021] Figure label: 1. Base plate; 2. Four-station turntable mechanism; 21. Turntable; 22. Servo motor; 23. Bearing test stand; 231. XY axis precision adjustment table; 232. Fixture; 233. Test stand; 234. Test box; 24. Buffer seat; 3. Y-axis hopper mechanism; 31. Hopper; 32. Y-axis material handling module; 33. Material tray; 34. NG tray; 35. Hopper lifting mechanism; 351. Hopper lead screw; 352. Optical axis; 353. Hanging plate; 354. Support plate; 355. Upright pole; 356. Guide sleeve; 357. Position sensor; 358. Protective cover; 36. Bearing plate; 37. Positioning pin; 4. Loading and unloading robot; 41. Gantry frame; 42. Linear motor 43. Synchronous belt electric slide table; 44. Gripper assembly; 441. Rotary motor; 442. Gripper cylinder; 5. Surface light test module; 51. Drawing card lifting mechanism; 511. Mounting base; 512. Connecting plate; 513. Adapter plate; 514. Top plate; 515. Electric lead screw; 516. Driven lead screw; 517. Synchronous belt assembly; 518. Scale; 519. Drawing card mounting plate; 52. Repeater module; 521. Center shim block; 522. Repeater mounting plate; 523. L-shaped support plate; 524. Repeater; 53. Light shield; 54. Drawing card; 541. First hinge seat; 542. Second hinge seat; 543. Nitrogen spring; 544. Handle 6. White field detection component; 61. Z-axis lifting cylinder; 62. White light infrared integrating sphere light source; 7. Cutting component; 71. Central X-axis linear motor; 72. Central Z-axis linear motor; 73. Parallel cylinder gripper; 74. Cutting X-axis synchronous belt electric slide; 75. Cutting seat; 8. Parallel light tube testing module; 81. Parallel light tube mechanism; 811. Mounting plate; 812. Horizontal plate; 813. FOV field of view test target; 814. First scale line; 815. First pointer; 816. Waist-shaped through hole; 817. Horizontal plate XY-axis precision adjustment stage; 82. Inclined parallel light tube; 83. Vertical parallel light tube; 84. Arc-shaped through hole; 85. Parallel light tube bracket; 86. 1. Track plate; 852. T-shaped limit block; 853. Arc-shaped track groove; 854. Optical tube bracket slider; 855. Second scale line; 856. Second pointer; 86. Parallel optical tube lifting mechanism; 861. Parallel optical tube mounting base; 862. Parallel optical tube optical axis; 863. Parallel optical tube top plate; 864. Parallel optical tube electric lead screw; 865. Parallel optical tube synchronous belt assembly; 866. Parallel optical tube connecting plate; 867. Parallel optical tube driven lead screw; 868. Tensioning wheel; 869. Parallel optical tube scale; 9. Black field test assembly; 91. Slide table cylinder; 92. Light shield drive plate; 93. Lifting cylinder; 94. Light shield; 95. Light shielding sponge; 10. Barcode scanner. Detailed Implementation

[0022] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0023] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state. They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are 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.

[0024] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] AWB (Automatic White Balance) refers to the camera module automatically adjusting its color settings to ensure that white objects appear white under different color temperature light sources. OC (usually referring to Color Cast) refers to an image exhibiting an unwanted single hue, such as a reddish or greenish tint. SNR (Signal-to-Noise Ratio) refers to the power ratio of useful image information to useless random interference. A higher SNR results in a cleaner image with clearer details; a lower SNR results in a "dirty" image filled with snowflake-like noise. Rotation refers to the physical angular deviation between the optical axis of the lens module under test and its housing or circuit board. FOV (Field of View) refers to the angular range of space that a camera can "see." It is usually expressed as a horizontal, vertical, or diagonal angle. COD (Center of Distortion) usually refers to Principal Point Offset or Center Offset.

[0027] like Figures 1 to 12 As shown, the present invention provides an EOL testing device for lens modules, which is used to perform comprehensive performance testing on assembled lens modules at the end of the production line to ensure their stable and reliable quality.

[0028] like Figure 1 and Figure 2 As shown, the lens module EOL testing equipment in this embodiment mainly includes a base plate 1, a four-station turntable mechanism 2, a Y-axis material bin mechanism 3, a loading and unloading robot 4, a surface light testing module 5, a white field testing component 6, a cutting component 7, a parallel light tube testing module 8, and a black field testing component 9.

[0029] The base plate 1 serves as the supporting foundation for the equipment. A four-station turntable mechanism 2 is positioned at the center of the base plate 1, with a Y-axis hopper mechanism 3, a loading / unloading robot 4, a surface light testing module 5, a white light detection component 6, a cutting component 7, a collimator testing module 8, and a black light testing component 9 arranged sequentially around it. The Y-axis hopper mechanism 3 docks with the loading / unloading robot 4, which docks with the four-station turntable mechanism 2 at the first station. The surface light testing module 5 docks with the four-station turntable mechanism 2 at the second station. The white light detection component 6 and the cutting component 7 both dock with the four-station turntable mechanism 2 at the third station. The collimator testing module 8 and the black light testing component 9 both dock with the four-station turntable mechanism 2 at the fourth station.

[0030] The seven functional units—Y-axis hopper mechanism 3, loading / unloading robot 4, surface light testing module 5, white field detection component 6, cutting component 7, collimator testing module 8, and black field testing component 9—are arranged in a circular layout around the four-station turntable mechanism 2. This integrates a complete EOL (Extended Online Detection) process within a single device, from automatic loading / unloading and multi-functional optical detection to the sorting / transfer of qualified products. This achieves "one-stop" full inspection, ensuring the overall quality of outgoing products and avoiding the problems of high cost, large footprint, and low efficiency associated with multiple connected devices. The white field detection component 6 is shared with the cutting component 7 in the third station, and the collimator testing module 8 is shared with the black field testing component 9 in the fourth station. Six main functions are completed using only four physical stations, resulting in an exceptionally compact structure and small footprint. This significantly improves space utilization and equipment compactness, reduces the total number of stations required for the four-station turntable mechanism 2, simplifies the drive and control system, and lowers manufacturing costs.

[0031] The specific workflow is as follows: When the equipment is used as a single machine, the operator manually loads the lens module to be tested into the tray 33 of the Y-axis hopper mechanism 3. The Y-axis hopper mechanism 3 then conveys the tray 33 containing the lens module to the area below the loading / unloading robot 4. The loading / unloading robot 4 picks up the lens module from the tray 33 and transfers it to the bearing test seat 23 of the four-station turntable mechanism 2 at the first station. Subsequently, driven by the servo motor 22, the four-station turntable mechanism 2 sequentially transfers the lens module to the second, third, and fourth stations.

[0032] At the second station, the lens module connects to the surface light testing module 5 for tests including sharpness, OC, color grayscale, SNR, and rotation. The sharpness test at this station is specifically for lenses with a small field of view. At the third station, the lens module connects to the white point detection component 6 for tests including bright spots, dark spots, blemishes, white balance, vignetting, and AWB. At the fourth station, the lens module first connects to the collimator testing module 8 for tests including sharpness, FOV, and COD. The sharpness test at this station is specifically for lenses with a large field of view. Subsequently, the black point testing component 9 performs a black point test on the same lens module. After all tests are completed, the turntable 21 returns to the first station, and the loading / unloading robot 4, based on the test results, places qualified products back into the material tray 33 and unqualified products into the NG tray 34.

[0033] When the equipment is combined with upstream and downstream processes to form a production line, the cutting component 7 of the upstream process conveys the lens module to be tested to the area below the loading / unloading robot 4. After being picked up, the loading / unloading robot 4 places it on the bearing test seat 23 of the four-station turntable mechanism 2. The four-station turntable mechanism 2 is equipped with four buffer seats 24. The four-station turntable mechanism 2, carrying the lens module, sequentially docks with the surface light testing module 5 at the second station, with the white field detection component 6 at the third station, and with the collimator testing module 8 and the black field testing component 9 at the fourth station. Returning to the first station, the loading / unloading robot 4 places qualified products on the buffer seats 24, and unqualified products into the NG tray 34. It then places the new lens module to be tested on the empty bearing test seat 23 or on the fourth station turntable mechanism 2. Qualified products on the buffer seats 24 flow with the turntable 21. When they reach the third station, they are picked up by the parallel cylinder gripper 73 of the cutting component 7 and conveyed to the next process equipment.

[0034] like Figure 3 As shown, the Y-axis hopper mechanism 3 includes a hopper 31 and a Y-axis material tray conveying module 32. The hopper 31 can hold multiple layers of material trays 33. The Y-axis material tray conveying module 32 is connected to the hopper 31 and is used to pick up and put down the material trays 33 from the hopper 31 and drive the material trays 33 to move in the Y direction.

[0035] The internal structure of the hopper 31 is multi-layered, capable of stacking and storing multiple trays 33 containing lens modules to be tested. This solves the problem of frequent manual loading and provides material support for automated testing. The bottom of the hopper 31 is connected to a hopper lifting mechanism 35, which can drive the entire hopper 31 to move up and down in the Z-axis direction so that a certain layer of trays 33 in the hopper 31 can dock with the tray Y-axis transport module 32. The hopper lifting mechanism 35 consists of a hopper screw 351, optical shafts 352, and a support plate 354. The bottom of the hopper 31 is connected to a hanging plate 353 via four optical shafts 352, forming an integrated lifting unit with the hopper 31. The two ends of the hopper screw 351 are respectively rotatably mounted on the hanging plate 353 and the bottom of the hopper 31. The hopper screw 351 moves up and down together with the hopper 31 and the hanging plate 353. The power source is located on the hanging plate 353 and is connected to the hopper screw 351 via a transmission structure to drive the hopper screw 351 to rotate, thereby realizing the lifting and lowering of the hopper 31.

[0036] Preferably, the hopper 31 is a box with openings on both sides along the Y-axis, and its two side walls along the X-axis are provided with several limiting strips to support the trays 33. There are gaps between adjacent trays 33 to facilitate the loading and unloading of the trays 33.

[0037] The Y-axis hopper mechanism 3, through its innovative multi-layer stacking design and precise lifting and picking mechanism, constructs a highly efficient and stable automated feeding system. With its robust structure and strong load-bearing capacity, it significantly increases the material storage capacity per feeding cycle and substantially reduces the frequency of feeding by operators. It completely replaces the traditional manual labor of picking up, placing, and transporting trays, achieving full automation of the feeding process.

[0038] A support plate 354 is fixedly connected to the bottom of the equipment base plate 1 by four uprights 355. The hopper screw 351 and the optical shaft 352 pass through the equipment base plate 1 and the support plate 354, and can move along the Z-axis. The screw sleeve of the hopper screw 351 is fixed to the bottom of the support plate 354. When the hopper screw 351 rotates, there is a relative displacement between the hopper screw 351 and the screw sleeve along the Z-axis, which can drive the hopper 31 and the material tray 33 to perform lifting and lowering actions. That is, the hopper 31 and the equipment base plate 1 are relatively displaced along the Z-axis, realizing the lifting and lowering of the hopper 31. A guide sleeve 356 is also provided on the optical shaft 352. The guide sleeve 356 is fixed on the support plate 354 and can play a precise guiding role for the optical shaft 352, effectively limiting the radial movement of the optical shaft 352, ensuring that the hopper 31 can only move linearly along the Z-axis during the lifting and lowering process, preventing shaking and skew, and greatly improving the stability of the movement and the repeatability of the positioning accuracy.

[0039] Preferably, the pallet 354 is provided with a clearance section to avoid the power unit and transmission device of the hopper lifting mechanism 35.

[0040] Preferably, there is a gap between the hopper screw 351 and the optical shaft 352 and the base plate 1 and the support plate 354 to facilitate the movement of the hopper screw 351 and the optical shaft 352.

[0041] The equipment base plate 1 is also equipped with a position sensor 357 for positioning the lifting position of the hopper 31. The photoelectric sensor cooperates with the through hole on the hopper 31. When the photoelectric sensor is aligned with the corresponding through hole, the surface grain hopper moves to the corresponding position. The equipment base plate 1 is also equipped with a protective cover 358 for protecting the hopper 31.

[0042] The Y-axis transport module 32 of the material tray is driven by a synchronous belt electric slide table 43. The carrier plate 36 on the slide is provided with positioning pins 37. The bottom surface of the NG tray 34 and the material tray 33 is provided with insertion holes for insertion into the positioning pins 37 to achieve precise positioning.

[0043] The Y-axis hopper mechanism 3 forms a stable support frame by setting a support plate 354 and a vertical rod 355 at the bottom of the equipment base plate 1. The hopper screw 351 cooperates with the screw sleeve fixed at the bottom of the support plate 354 to drive the hopper 31 to rise and fall along the Z-axis. The optical shaft 352 cooperates with the guide sleeve 356 to achieve high-precision linear guidance, effectively preventing shaking and skew, and ensuring smooth lifting and repeatability. The support plate 354 is provided with a clearance part to accommodate the power and transmission device. The hopper screw 351 and optical shaft 352 are reserved with the base plate 1 and support plate 354 to ensure smooth movement. The position sensor 357 cooperates with the through hole of the hopper 31 to achieve accurate detection and positioning of the lifting position. The protective cover 358 improves safety. The Y-axis conveying module 32 of the material tray is driven by a synchronous belt electric slide table 43. The positioning pin 37 on its bearing plate 36 is inserted into the bottom hole of the material tray 33 and the NG tray 34 to achieve rapid and accurate positioning of the material tray 33. This structure integrates high-precision transmission, stable guidance, precise positioning and safety protection, ensuring the reliability and efficiency of automatic feeding of multi-layer trays 33.

[0044] like Figure 4 As shown, the loading / unloading robot 4 includes a gantry frame 41, on which a linear motor 42 is mounted. A synchronous belt electric slide 43, which moves perpendicular to the driving direction of the linear motor 42, is mounted on the drive block of the linear motor 42. Two gripper assemblies 44 are mounted on the drive block of this slide. The synchronous belt electric slide 43 and the two gripper assemblies 44 are arranged along the driving direction of the linear motor 42 to reduce space occupation. Each gripper assembly 44 includes a rotary motor 441 and a gripper cylinder 442, with the shaft of the rotary motor 441 connected to the gripper cylinder 442. Before the lens module is transferred to the four-station turntable mechanism 2 at the first station, it passes through a barcode scanner 10. At the position of the barcode scanner 10, the rotary motor 441 drives the gripper cylinder 442 to rotate together with the lens module, aligning the label code on the lens module with the barcode scanner 10. The barcode scanner 10 then reads and records the information of the lens module.

[0045] Preferably, the gantry frame 41 includes a gantry frame base, gantry frame columns, and gantry frame beams. The gantry frame columns are connected to the base plate 1 via the gantry frame base. The two gantry frame columns are arranged in parallel. The two ends of the gantry frame beam are respectively connected to the ends of the two gantry frame columns away from the base plate 1. The connection method can be one of the following: screw connection, bolt connection, welding connection, adhesive connection, or a combination of multiple connection methods.

[0046] The length of the gantry beam can be greater than the width between the two gantry columns. The side wall of the linear motor 42 is connected to the gantry beam to expand the range of motion of the linear motor 42.

[0047] Preferably, the drive block of the synchronous belt electric slide 43 is connected to two gripper assemblies 44 via a first connector and a second connector, respectively. The ends of the first connector and the second connector are provided with protrusions for connecting the gripper assemblies 44. The gripper assembly 44 also includes a vacuum suction cup for adsorbing the lens module to move it to a designated position, or other gripping structures.

[0048] The loading / unloading robot 4 is supported by a gantry structure. A linear motor 42 is mounted on the side of a beam whose length exceeds the column spacing, expanding its travel range. A synchronous belt electric slide 43 is mounted on its drive block, with two gripper assemblies 44 arranged side-by-side along the drive direction, resulting in a compact structure that covers multiple workstations. Each gripper assembly 44 integrates a rotary motor 441 and a gripper cylinder 442. Before transferring the lens module to the first workstation, the module's posture can be adjusted by rotation to ensure the label code is aligned with the barcode scanner 10 for automatic code reading, enabling product information traceability. The gripper assemblies 44 are reliably connected via protrusions from the first and second connecting parts and can be optionally equipped with gripping structures such as vacuum suction cups to adapt to different product requirements. This design achieves high-speed, high-precision, and multi-functional automated loading / unloading and barcode scanning integrated operation, improving efficiency and intelligence.

[0049] like Figure 5 As shown, the four-station turntable mechanism 2 includes a turntable 21 and a servo motor 22. The servo motor 22, which drives the turntable 21 to rotate, is located at the bottom of the equipment base plate 1. Four load-bearing test seats 23 are evenly distributed on the turntable 21. The lens module that has been scanned is transferred to the load-bearing test seat 23 of the four-station turntable mechanism 2 at the first station by the gripper cylinder 442 of the loading and unloading robot 4.

[0050] Preferably, the turntable 21 includes a body and a rotating frame. The rotating frame is mounted on the body. The body is a disc, and the rotating frame has a cross structure. A circular connecting part is provided in the middle of the rotating frame, and mounting parts are provided at the four ends of the rotating frame. The area of ​​the circular connecting part is smaller than that of the body and is used to connect a power source for rotation. The mounting part is used to install the load-bearing test seat 23. A through hole is provided in the middle of the turntable 21.

[0051] Each load-bearing test stand 23 includes an XY-axis precision adjustment stage 231 fixed to the turntable 21, used to adjust the position of the clamp 232 during debugging so that the lens flow trajectory passes through the docking positions of each station; the load-bearing test stand 23 also includes a clamp 232 fixed to the XY-axis precision adjustment stage 231, a test stand 233 fixed to the inside of the clamp 232, and a test box 234 fixed to the turntable 21 body. The scanned lens module is placed on the test stand 233 and then clamped and fixed by the clamp 232. The test box 234 integrates a control and testing module and is connected to the test stand 233 by power and signal. The test fixture 233 is equipped with probes. After the lens module is placed inside the test fixture 233, it is connected to the test fixture 233 through the probes. This allows for the completion of current testing, static current testing, hardware and software version testing, resolution testing, internal parameter burning result testing, and frame rate testing at the first station. At the second station, sharpness testing, OC testing, color grayscale testing, SNR testing, and rotation testing are performed. At the third station, bright spot and dark spot testing, blemish testing, white balance testing, vignetting testing, and AWB testing are performed. At the fourth station, sharpness testing, FOV testing, COD testing, and black level testing are performed. All testing methods can be implemented using existing technology, ultimately achieving various electrical and functional tests. The four buffer seats 24 on the four-station turntable mechanism 2 are configured one-to-one with the test fixture 23.

[0052] The four-station turntable mechanism 2 drives the cross-shaped rotating frame via servo motor 22 to precisely and intermittently rotate the four load-bearing test seats 23, achieving orderly flow between stations. Each load-bearing test seat 23 integrates an XY-axis precision adjustment stage 231, facilitating precise calibration of the alignment between the lens module and the test components at each station during debugging. The fixture 232, in conjunction with the test seat 233 with probes, enables rapid clamping and electrical conduction of the lens module. The test box 234 has a built-in control and testing module, supporting the completion of electrical tests such as current, version, and resolution, as well as internal parameter burning verification at the first station. It also collaboratively completes full-function testing of clarity, OC, color, SNR, rotation, white balance, vignetting, AWB, FOV, COD, and black level at subsequent stations. At the same time, each load-bearing test seat 23 is equipped with a corresponding buffer seat 24, which can temporarily store the tested and qualified products before the turntable 21 rotates, realizing parallel operation of "testing" and "unloading," significantly improving equipment cycle time and production efficiency, and taking into account high integration, high precision, and high automation levels.

[0053] like Figure 6 As shown, the surface light testing module 5 includes a picture card lifting mechanism 51 and a relay lens module 52, both fixed on the equipment base plate 1. The relay lens module 52 is located directly below the picture card lifting mechanism 51, thereby adjusting the positions of the relay lens 524 and the picture card 54 according to the parameters of the lens module, customer requirements, and the parameters of the relay lens module 52.

[0054] The drawing card lifting mechanism 51 includes four mounting seats 511, three optical shafts 352, a drawing card mounting plate 519, a drawing card 54, a top plate 514, an electric lead screw 515, a driven lead screw 516, a synchronous belt assembly 517, and a light shield 53. The four mounting seats 511 are fixed to the base plate 1 of the equipment. The four mounting seats 511 are divided into two groups, each group of mounting seats 511 is fixed together by a connecting plate 512, and the two groups of mounting seats 511 are fixed together by an adapter plate 513. The bottoms of two optical shafts 352 are fixed to the mounting seats 511, and the bottom of the other optical shaft 352 is fixed to the adapter plate 513. The tops of all three optical shafts 352 are fixed to the top plate 514. The drawing card mounting plate 519 can move up and down on the three optical shafts 352. One end of the electric lead screw 515 is mounted on the connecting plate 512 of one set of mounting bases 511, and the other end is mounted on the top plate 514. The lead screw sleeve of the electric lead screw 515 is fixed to the drawing card mounting plate 519, so that the drawing card mounting plate 519 and the drawing card 54 can be driven to move up and down along the optical axis 352 together by the electric lead screw 515. A driven lead screw 516 is mounted on the connecting plate 512 of the other set of mounting bases 511. The top end of the driven lead screw 516 is also mounted on the top plate 514. The lead screw sleeve of the driven lead screw 516 is fixed to the drawing card mounting plate 519, so that when the electric lead screw 515 drives the drawing card mounting plate 519 and the drawing card 54 to move up and down along the optical axis 352 together, the lead screw sleeve of the driven lead screw 516 moves synchronously, making the entire drive structure more stable and smooth. A timing belt assembly 517 is positioned on top of the top plate 514. Power is transmitted between the electric lead screw 515 and the driven lead screw 516 via the timing belt assembly 517. This timing belt assembly 517 structure allows at least one driven lead screw 516 to move using only one timing belt, resulting in a simple and reliable structure. Multiple tension pulleys maintain the tension of the timing belt. A scale 518 is also provided between the connecting plate 512 and the top plate 514 to facilitate observation of the position of the chart mounting plate 519. The top of the light-shielding plate 53 is connected to the top plate 514, and the lower middle part of the light-shielding plate 53 is connected to the adapter plate 513, ensuring stable installation of the light-shielding plate 53. The light-shielding plate 53 reduces light interference between the surface light testing module 5 and the parallel light tube testing module 8, improving testing accuracy.

[0055] Preferably, the adapter plate 513 has a V-shaped structure, with its two side walls connected to the two connecting plates 512 by screws. By setting the adapter plate 513, the adapter plate 513 can not only install the optical axis 352, but also accommodate the installation of the light shield 53. Furthermore, while ensuring that the drawing plate 519 can move stably up and down along the optical axis 352, the number of optical axes 352 is reduced from the original four to three, thus reducing costs.

[0056] The repeater module 52 includes a central elevation block 521, on which an XY-axis precision adjustment stage 231 (existing technology) is provided. A repeater mounting plate 522 is provided on the XY-axis precision adjustment stage 231, and a Z-axis precision adjustment stage (existing technology) is provided on the repeater mounting plate 522. An L-shaped support plate 523 is provided on the Z-axis precision adjustment stage, and a repeater 524 is mounted on the L-shaped support plate 523.

[0057] The surface light testing module 5 integrates the chart lifting mechanism 51 and the repeater module 52, achieving high-precision and multi-functional optical inspection. The chart lifting mechanism 51 adopts a double-screw structure driven by an electric lead screw 515 and synchronously linked by a driven lead screw 516 through a synchronous belt assembly 517. With the guidance of three optical axes 352, it ensures the stability and high precision of the chart 54's movement in the Z-axis direction. Combined with the scale 518, it facilitates real-time position observation. The innovative V-shaped adapter plate 513 not only realizes the integrated installation of the optical axis 352 and the light shield 53, but also reduces the number of optical axes from four to three, reducing costs. The repeater module 52 achieves multi-dimensional fine adjustment of the repeater 524 through the XY-axis and Z-axis precision adjustment stages, ensuring accurate alignment of the optical path. At the same time, the light shield 53 effectively isolates the light interference from the adjacent parallel light tube testing module 8. Through its sophisticated mechanical structure and ingenious integrated layout, this design not only ensures the accuracy and repeatability of tests such as sharpness, OC, color grayscale, SNR, and rotation, but also enhances the versatility and reliability of the equipment, providing a solid foundation for a comprehensive evaluation of the imaging quality of the lens module.

[0058] like Figure 7 As shown, the mounting plate 519 is a plate with a square through hole. The drawing card 54 is mounted at the square through hole, and one side of the drawing card 54 is hinged to one side of the square through hole. A nitrogen spring 543 is hinged to the mounting plate 519, and the other end of the nitrogen spring 543 is hinged to the drawing card 54. The angle of the drawing card 54 can be adjusted by the nitrogen spring 543 to obtain images of the drawing card 54 from more angles and to perform more accurate calibration. The working medium of the nitrogen spring 543 is gas, which has advantages such as no pollution compared to hydraulic rods and other adjusting rods with liquid working media.

[0059] A first hinge seat 541 is fixed on the mounting plate 519, and a second hinge seat 542 is fixed on the drawing card 54. A nitrogen spring 543 is hinged to both the first hinge seat 541 and the second hinge seat 542. The drawing card 54 has a closed state. In this closed state, the second hinge seat 542 is in contact with the mounting plate 519, and the hinge position of the nitrogen spring 543 with the first hinge seat 541 is higher than the hinge position of the nitrogen spring 543 with the second hinge seat 542. This allows the drawing card 54 to self-lock in the closed state, facilitating accurate adjustment of the working pressure of the nitrogen spring 543 without requiring an external limiting mechanism. The drawing card 54 also has a handle 544 for easy manual opening from the self-locking state.

[0060] When the lens module moves to the second station, it is directly below the repeater module 52. The lens module captures the image of the image card 54 through the repeater 524. The control and testing module in the test box 234 analyzes the acquired image to complete the sharpness test (this test is performed on small field-of-view lens modules), OC test, color grayscale test, SNR test and rotation test. The specific test methods can be implemented using existing technologies.

[0061] By setting a hinge structure with a square through hole on the chart mounting plate 519, and using a nitrogen spring 543 to connect the first hinge seat 541 and the second hinge seat 542, flexible adjustment and reliable self-locking of the chart 54 angle are achieved. When the chart 54 is closed, the hinge point of the nitrogen spring 543 forms a high-position constraint, achieving natural self-locking under gas pressure. It can stably maintain the closed state without the need for an additional limiting mechanism, facilitating precise adjustment of its working pressure. The handle 544 is designed for easy manual opening. This structure utilizes the pollution-free and long-life characteristics of nitrogen springs, not only supporting the chart 54 to unfold at multiple angles to meet different calibration requirements and improve testing accuracy, but also taking into account operational convenience and maintenance reliability, effectively ensuring the flexibility and stability of testing key optical parameters such as sharpness, OC, color grayscale, SNR, and rotation.

[0062] like Figure 8 As shown, the cutting assembly 7 includes a central X-axis linear motor 71, a central Z-axis linear motor 72 mounted on the drive block of the central X-axis linear motor 71, and a parallel cylinder gripper 73 mounted on the drive block of the central Z-axis linear motor 72. A cutting X-axis synchronous belt electric slide 74 is mounted on one side of the central X-axis linear motor 71, and a cutting seat 75 is mounted on the slider of the cutting X-axis synchronous belt electric slide 74. The parallel cylinder gripper 73 is used to grip the inspected lens module from the buffer seat 24 onto the cutting seat 75, and then the cutting seat 75 cuts the module into the machine for the next process.

[0063] The white field detection component 6 is located on the side of the cutting X-axis synchronous belt electric slide 74 away from the cutting component 7. The white field detection component 6 includes a Z-axis lifting cylinder 61. A white light infrared integrating sphere light source 62 is set on the drive plate of the Z-axis lifting cylinder 61. The lens module that has completed the test at the second station moves to directly below the white light infrared integrating sphere light source 62. The Z-axis lifting cylinder 61 drives the white light infrared integrating sphere light source 62 to descend and cover the lens module. The lens module captures a white light image. The control and testing module in the test box 234 analyzes the acquired image to complete the bright spot and dark spot test, stain test, white balance test, vignetting test and AWB test. The specific test methods can be implemented using existing technology.

[0064] By sharing a third workstation with the cutting assembly 7 and the white balance detection assembly 6, functional integration and efficient space utilization are achieved. The intermediate X-axis linear motor 71 and intermediate Z-axis linear motor 72 form a high-precision two-dimensional moving platform, driving the parallel cylinder gripper 73 to precisely pick up qualified products from the buffer seat 24 and place them on the cutting seat 75, completing the automatic transfer to the next process. Simultaneously, the layout of the cutting X-axis synchronous belt electric slide 74 provides installation space for the white balance detection assembly 6, and the two work together. The white balance detection assembly 6 uses a Z-axis lifting cylinder 61 to drive the white light infrared integrating sphere light source 62 to extend downwards and cover the lens module, forming a uniform and stable lighting environment, ensuring the accuracy and consistency of test results such as bright spots / stains, white balance, vignetting, and AWB. This design, through workstation reuse, achieves parallel preparation of "detection" and "output" in a compact structure, greatly improving the overall cycle time and automation level of the equipment.

[0065] like Figure 9As shown, the collimator testing module 8 is equipped with a collimator lifting mechanism 86. The collimator lifting mechanism 86 includes four collimator mounting seats 861, four collimator optical axes 862, a collimator mechanism 81, a collimator top plate 863, a collimator electric lead screw 864, and a collimator synchronous belt assembly 865. The four collimator mounting seats 861 are fixed on the equipment base plate 1. The bottoms of the four collimator optical axes 862 are respectively fixed on the collimator mounting seats 861, and the tops of the four collimator optical axes 862 are fixed on the collimator top plate 863. The collimator mechanism 81 is located between the collimator top plate 863 and the collimator mounting seats 861, and the collimator mechanism 81 can move up and down on the four collimator optical axes 862. The four collimator mounting bases 861 are divided into two groups. Two collimator mounting bases 861 in each group are fixed by a collimator connecting plate 866. One end of the collimator electric screw 864 is set on one of the collimator connecting plates 866, and the other end of the collimator electric screw 864 is set on the collimator top plate 863. The screw sleeve of the collimator electric screw 864 is fixed to the collimator mechanism 81, so that the collimator mechanism 81 can be driven to move up and down along the collimator optical axis 862 by the collimator electric screw 864. Another collimator connecting plate 866 is equipped with a collimator driven lead screw 867. The top of the collimator driven lead screw 867 is also located on the collimator top plate 863. The lead screw sleeve of the collimator driven lead screw 867 is fixed to the collimator mechanism 81. Thus, when the collimator electric lead screw 864 drives the collimator mechanism 81 to move up and down along the collimator optical axis 862, the lead screw sleeve of the collimator driven lead screw 867 moves synchronously, making the entire drive structure more stable and smooth. The collimator synchronous belt assembly 865 is located on the top of the collimator top plate 863. The collimator electric lead screw 864 and the collimator driven lead screw 867 transmit power through the collimator synchronous belt assembly 865. This collimator synchronous belt assembly 865 structure can drive at least one collimator driven lead screw 867 with only one synchronous belt. The structure is simple and reliable, and the tension of the synchronous belt is maintained by multiple tensioning pulleys 868. A collimator scale 869 is also provided between the collimator mounting base 861 and the collimator top plate 863 to facilitate observation of the position of the collimator mechanism 81.

[0066] The collimator testing module 8 uses a lifting mechanism driven by a collimator electric lead screw 864, a collimator driven lead screw 867, and a collimator synchronous belt assembly 865 to drive the collimator mechanism 81 to achieve high-precision and stable Z-axis movement along the four collimator optical axes 862. The collimator scale 869 monitors the position in real time, making the height of the collimator adjustable to meet the testing needs of lens modules with different focal lengths or working distances. The dual-lead screw synchronous drive structure ensures the stability and parallelism of the movement under heavy loads, avoiding tilting and jamming, and guaranteeing the accuracy and repeatability of optical parameter measurements such as FOV and COD, thus improving the equipment's versatility and testing reliability.

[0067] like Figure 10 As shown, the collimator mechanism 81 includes a mounting plate 811 with an oblong through-hole 816. The mounting plate 811 has four arc-shaped through-holes 84 concentric with the arc edges of the oblong through-hole 816. A collimator support 85 is slidably disposed within each arc-shaped through-hole 84. An inclined collimator 82 is mounted on the collimator support 85, allowing adjustment of the installation angle of the inclined collimator 82 in the horizontal plane. A horizontal plate 812 spanning the oblong through-hole 816 is provided on the mounting plate 811. A horizontal plate XY-axis precision adjustment stage 817 is provided on the horizontal plate 812. A vertical collimator 83 is mounted on the horizontal plate XY-axis precision adjustment stage 817. The horizontal plate XY-axis precision adjustment stage 817 is used to adjust the position of the vertical collimator 83 so that it is positioned directly above the lens module. The mounting plate 811 has a first scale line 814 along the arc-shaped through hole 84, and the collimator bracket 85 has a first pointer 815 to visually determine the installation angle of the collimator in the horizontal plane. The mounting plate 811 is surrounded by FOV (Field of View) test targets 813 with scale lines, used to detect the edge position of the image captured by the lens module, thereby detecting the FOV of the image captured by the lens module. The lens module captures an image composed of four tilted collimators 82 and one vertical collimator 83, completing the lens module's sharpness test (this item is tested for large field of view lens modules) and COD (Critical Optical Demand) test.

[0068] The collimator mechanism 81, through four arc-shaped through holes 84 on the mounting plate 811 with an oblong through hole 816, allows the collimator bracket 85 to slide along the arc, thereby achieving angle adjustment of the tilted collimator 82 in the horizontal plane. This, combined with the first pointer 815 and the first scale line 814, enables intuitive angle positioning. The horizontal plate XY axis precision adjustment stage 817 on the horizontal plate 812 can finely adjust the position of the vertical collimator 83, ensuring its precise alignment with the lens module's optical axis. The integrated FOV (Field of View) test target 813 allows for direct detection of image edges at the same station to calculate the field of view. This structure highly integrates multi-angle tilting collimators, adjustable vertical collimators, and FOV targets, enabling simultaneous completion of sharpness, FOV, and COD tests for large field of view lenses with a single shot. This achieves multi-functional, high-precision, and high-efficiency integrated optical inspection, significantly improving the integration and accuracy of the tests.

[0069] like Figure 11 As shown, the parallel light tube support 85 includes a track plate 851, on which a T-shaped limiting block 852 is provided. The T-shaped limiting block 852 and... Figure 10 The system is assembled with an arc-shaped through-hole 84, and the first pointer 815 is fixed on the T-shaped limit block 852. The track plate 851 is provided with a vertical arc-shaped track groove 853, and a light tube support slider 854 is provided in the arc-shaped track groove 853. The inclined parallel light tube 82 is fixed to the light tube support slider 854 by a locking nut. The arc-shaped track groove 853 is provided with a second scale line 855, and a second pointer 856 is provided on the light tube support slider 854 to directly determine the installation angle of the inclined parallel light tube 82 in the vertical plane. This structure of the parallel light tube support 85 is convenient to install and reliable in operation.

[0070] The collimator support 85 achieves stable horizontal angle sliding and positioning through the T-shaped limiting block 852 and the arc-shaped through hole 84, and the angle is intuitively read by the first pointer 815 and the first scale line 814. Simultaneously, a vertical arc-shaped track groove 853 is provided on the track plate 851, which, together with the collimator support slider 854 and the locking nut, adjusts the tilt angle of the inclined collimator 82 in the vertical plane. The second pointer 856 and the second scale line 855 enable direct reading of this angle. This structure integrates horizontal and vertical angle adjustment functions into a compact module, ensuring both the flexibility and reliability of multi-degree-of-freedom precision adjustment, and improving debugging efficiency and repeatability through a visual scale design, ensuring high accuracy and stability in COD and other optical parameter testing.

[0071] like Figure 12As shown, the black field test assembly 9 includes a sliding cylinder 91 fixed on the equipment base plate 1. A light shield drive plate 92 is provided on the sliding block of the sliding cylinder 91. A lifting cylinder 93 is provided on the light shield drive plate 92. A light shield 94 is provided on the drive plate of the lifting cylinder 93. A light-blocking sponge 95 is provided on the bottom section of the light shield 94. After the collimator test module 8 completes the test on the lens module, the black field test assembly 9 performs a black field test on the lens module. During the black field test, the sliding cylinder 91 drives the light shield 94 to move directly above the lens module. The lifting cylinder 93 then drives the light shield 94 to descend, so that the light-blocking sponge 95 is pressed tightly against the cross section of the test base 233, placing the lens module in a completely dark environment. The lens module captures an image of the dark environment, and the test box 234 analyzes whether there are white spots or other noise in the image captured in the dark environment.

[0072] The black field testing component 9 uses a sliding cylinder 91 and a lifting cylinder 93 to drive the light shield 94, achieving precise horizontal movement and vertical downward pressure. This allows the light shield 94 to be accurately positioned above the lens module. The light-blocking sponge 95 at the bottom presses tightly against the test base 233 during descent, effectively blocking external light leakage and creating a completely dark testing environment for the lens module. This structure is reliable and well-sealed, ensuring the authenticity of image data during black field testing. It can accurately detect imaging defects such as dark current, dead pixels, and white spots, improving the reliability and accuracy of the detection.

[0073] The second objective of this invention is to disclose a lens module EOL detection method, using a lens module EOL detection device as described in any of the above claims, the method comprising the following steps: S1. The Y-axis material hopper mechanism 3 conveys the tray 33 containing the lens module to be tested to the area below the loading / unloading robot 4; S2. The loading / unloading robot 4 picks up the lens module to be tested from the tray 33 and places it on the test support 23 of the four-station turntable mechanism 2 at the first station; S3. The four-station turntable mechanism 2 drives the lens module to the second, third, and fourth stations in sequence, and performs surface light testing, white field detection, collimator testing, and black field testing respectively; S4. After all tests are completed, the four-station turntable mechanism 2 returns to the first station, and the loading / unloading robot 4 puts the qualified products back into the tray 33 and the unqualified products into the NG tray 34 according to the test results.

[0074] This invention discloses an EOL (End of Hour) testing method for lens modules. Utilizing the aforementioned highly integrated testing equipment, it achieves a complete, efficient, and reliable automated testing process. This method is particularly suitable for production scenarios involving independent operation, small batches of multiple varieties, or the R&D verification stage. The Y-axis hopper mechanism 3 automatically delivers the entire tray of lens modules to be tested to the picking position. The loading / unloading robot 4 automatically completes all actions of picking, loading, unloading, and sorting, completely replacing the tedious and error-prone traditional manual loading, manual testing, and manual sorting. This not only significantly reduces labor costs but, more importantly, eliminates the impact of human factors such as fatigue and negligence on the testing process, ensuring that each product undergoes a completely consistent standardized process. This greatly improves the reliability and repeatability of the test results. Within a compact device, through the orderly flow of the four-station turntable mechanism 2, this method sequentially completes four key tests: surface light testing, white field testing, collimator testing, and black field testing. This "one-stop" testing mode guarantees the overall quality of the products leaving the factory and avoids quality risks caused by missed inspections.

[0075] A third objective of this invention is to disclose a lens module EOL detection method, using a lens module EOL detection device as described in any of the above claims, the method comprising the following steps: T1. The cutting assembly of the previous process conveys the lens module to be tested to the area below the loading / unloading robot 4; T2. The loading / unloading robot 4 picks up the lens module to be tested and places it on the bearing test seat 23 of the four-station turntable mechanism 2 at the first station, while simultaneously moving the qualified products from the previous cycle from the bearing test seat 23 to the buffer seat 24; T3. The four-station turntable mechanism 2 drives the lens module to be tested to the second, third, and fourth stations in sequence for surface light testing, white field testing, collimator testing, and black field testing, respectively. When the qualified products from the previous cycle on the buffer seat 24 are transferred to the third station along with the lens module to be tested, the cutting assembly 7 picks up the qualified products on the buffer seat 24 and conveys them to the next process equipment; T4. The four-station turntable mechanism 2 returns to the first station, and the loading and unloading robot 4 places the newly completed qualified products on the empty buffer seat 24, moves the unqualified products back to the designated position of the Y-axis hopper mechanism 3, and places the new lens module to be tested on the empty bearing test seat 23 to enter the next testing cycle.

[0076] This method abandons the traditional tray loading and unloading mode, replacing it with a direct transfer of the lens module to be tested from the cutting component of the previous process. After inspection, the cutting component 7 directly transfers the qualified products to the next process equipment, realizing online inspection. The lens module flows continuously between workstations, eliminating production cycle interruptions caused by tray changes and waiting, greatly improving the smoothness and overall efficiency of the entire production line. The buffer seat 24 is used to realize parallel operation of inspection and transmission, eliminating waiting time.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lens module EOL testing device, characterized in that, include: A four-station turntable mechanism (2) for transferring lens modules is provided, and multiple bearing test seats (23) are provided on the four-station turntable mechanism (2) to place the lens modules that have been scanned; Multiple functional modules are arranged around the four-station turntable mechanism (2), including a surface light testing module (5), a white field detection component (6), a parallel light tube testing module (8), and a black field testing component (9) for optical testing. The collimator test module (8) and the black field test component (9) are connected to the lens module at the same station of the four-station turntable mechanism (2) to complete the collimator test and the black field test in sequence at the station.

2. The lens module EOL testing equipment according to claim 1, characterized in that, The equipment also includes a cutting assembly (7), which is connected to the lens module at the same station of the four-station turntable mechanism (2) as the white field detection assembly (6) so that the qualified product is cut out by the cutting assembly (7) at the station.

3. The lens module EOL testing equipment according to claim 1 or 2, characterized in that, The equipment also includes a Y-axis hopper mechanism (3) and a loading / unloading robot (4). The loading / unloading robot (4) is connected to the four-station turntable mechanism (2) at the first station. The Y-axis hopper mechanism (3) is connected to the loading / unloading robot (4) to provide the lens module to be tested.

4. The lens module EOL testing equipment according to claim 3, characterized in that, The four-station turntable mechanism (2) is also provided with multiple buffer seats (24), which are configured one-to-one with the bearing test seat (23) for temporarily storing qualified lens modules so that they can be transferred to new lens modules to be tested.

5. The lens module EOL testing equipment according to claim 1, characterized in that, The surface light testing module (5) includes a height-adjustable chart lifting mechanism (51), a relay mirror module (52), and a chart (54). The relay mirror module (52) is fixedly disposed directly below the chart lifting mechanism (51), and the chart (54) is mounted on the chart lifting mechanism (51) and located above the relay mirror module (52). The map card lifting mechanism (51) is used to drive the map card (54) to move in the Z-axis direction to adjust its relative position with the relay mirror (524); The relay lens module (52) serves as an optical relay element, used to construct a test optical path, enabling the lens module under test to clearly capture the test pattern on the chart (54) through the relay lens (524), thereby completing the tests of sharpness, OC, color grayscale, SNR and rotation.

6. The lens module EOL testing equipment according to claim 1, characterized in that, The white field detection component (6) includes a Z-axis lifting cylinder (61) and a white light infrared integrating sphere light source (62). The drive end of the Z-axis lifting cylinder (61) is connected to the white light infrared integrating sphere light source (62) and is used to drive the white light infrared integrating sphere light source (62) to move in the Z-axis direction so that it descends to completely cover the lens module under test. The white light infrared integrating sphere light source (62) is used to provide uniform and stable white light illumination, so that the lens module under test can capture a standard white field image, thereby completing the tests of bright spots, dark spots, blemishes, white balance, vignetting and AWB.

7. The lens module EOL testing equipment according to claim 5, characterized in that, The collimator test module (8) includes a liftable collimator mechanism (81), a vertical collimator (83), an inclined collimator (82), and several FOV field of view test targets (813). The collimator mechanism (81) is used to drive the vertical collimator (83) and the tilted collimator (82) to move in the Z-axis direction so that they rise to dock with the lens module under test. The vertical collimator (83) and the tilted collimator (82) are used to provide a vertical collimated beam and a collimated beam at a specific angle, so that the lens module under test can capture the collimator image, thereby completing the sharpness and COD test. Several of the FOV field of view test targets (813) are arranged around the collimator mechanism (81) to complete the FOV test of the lens module under test.

8. The lens module EOL testing equipment according to claim 1, characterized in that, The black field test assembly (9) includes a slide cylinder (91), a lifting cylinder (93), and a light shield (94). The slider of the slide cylinder (91) is provided with a light shield drive plate (92), and the slide cylinder (91) is used to drive the light shield drive plate (92) to move directly above the lens module to be tested. The lifting cylinder (93) is fixed on the light shield drive plate (92), and its drive end is connected to the light shield (94). The lifting cylinder (93) is used to drive the light shield (94) to descend so that its bottom is pressed tightly against the bearing test seat (23). The light shield (94) is used to create a completely dark test environment, so that the lens module under test can take black field images without external light interference, thereby completing the tests for dark current, dead pixels and white spots.

9. A method for detecting the end-of-life (EOL) of a lens module, characterized in that, Using the lens module EOL detection equipment as described in any one of claims 3 to 8, the method includes the following steps: S1. The lens module to be tested is transferred to the bottom of the loading and unloading robot (4) via the Y-axis hopper mechanism (3); S2. The loading and unloading robot (4) picks up the lens module to be tested and places it on the bearing test seat (23) of the four-station turntable mechanism (2) at the first station; S3. The four-station turntable mechanism (2) drives the lens module to the second, third and fourth stations in sequence, and performs surface light test, white field test, parallel light tube test and black field test respectively. S4. After all tests are completed, the four-station turntable mechanism (2) returns to the first station, and the loading and unloading robot (4) transports the defective products back to the designated position of the Y-axis hopper mechanism (3) according to the test results.

10. A method for detecting the end-of-life (EOL) of a lens module, characterized in that, Using the lens module EOL detection device as described in claim 4, the method includes the following steps: T1. The cutting assembly of the previous process will transfer the lens module to be tested to the bottom of the loading and unloading robot (4); T2. The loading and unloading robot (4) picks up the lens module to be tested and places it on the bearing test seat (23) of the four-station turntable mechanism (2) at the first station. At the same time, the qualified products that have been tested in the previous cycle are moved from the bearing test seat (23) to the buffer seat (24). T3. The four-station turntable mechanism (2) drives the lens module under test to flow sequentially to the second station, the third station and the fourth station, respectively to perform surface light test, white field test, parallel light tube test and black field test. When the qualified products that have been tested in the previous cycle on the buffer seat (24) flow to the third station along with the lens module under test, the cutting component (7) picks up the qualified products on the buffer seat (24) and transfers them to the next process equipment. T4. The four-station turntable mechanism (2) returns to the first station. The loading and unloading robot (4) places the newly completed qualified products on the empty buffer seat (24), moves the unqualified products back to the designated position of the Y-axis hopper mechanism (3), and places the new lens module to be tested on the empty bearing test seat (23) to enter the next testing cycle.

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