Lens imaging end core adjusting device

Abstract

The utility model provides a lens imaging end core adjusting device, which relates to the technical field of lens core adjusting equipment, and comprises a casting base, and at least two clamping core adjusting modules capable of independently translating are arranged on the casting base in a sliding manner; the first precision ball screw transmission mechanism is mechanically coupled with the clamping and core adjusting module; the clamping and core adjusting module comprises a bottom plate, a six-degree-of-freedom fine adjustment platform is arranged on the bottom plate, and a vacuum adsorption type lens base clamp is arranged on the bearing surface of the six-degree-of-freedom fine adjustment platform; the laser collimator is optically coupled with the fine tuning platform, and the laser collimator is fixed at the reference end of the casting base through a first stand column; the ultraviolet curing and dispensing integrated unit is arranged on the second stand column; and after the laser collimator completes optical axis calibration, the first ball screw transmission mechanism transfers the tested lens to the ultraviolet curing and dispensing integrated unit to execute a gluing and curing process. The beneficial effects of the utility model are that: can unify centralization or stagger processing mode, has reduced the time loss greatly, has improved work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lens alignment equipment technology, and in particular to a lens imaging end alignment device. Background Technology

[0002] As a core component of precision optoelectronic systems, the technological evolution of optical lenses began with basic optical instruments such as traditional film imaging equipment, microscopic observation instruments, and astronomical telescopes, gradually expanding into the field of modern high-precision digital imaging. With the iterative upgrades of optoelectronic technology, optical lenses have permeated various cutting-edge technology fields, covering diverse application scenarios such as digital SLR systems, mobile terminal camera modules, intelligent security visual sensing devices, automotive ADAS image acquisition systems, IoT smart terminals, and aerial remote sensing equipment. In various optical imaging systems, lens coaxiality, as one of the core parameters affecting the MTF modulation transfer function, directly determines the system's imaging quality and optical transmission performance.

[0003] In the lens module assembly process, controlling the coaxiality of the lens elements and the imaging group is a critical process node for ensuring image quality. When the lens elements are bonded and fixed to the lens mount using UV-curing adhesive, optical axis alignment with micron-level precision is required. Experimental data shows that when the lens element offset exceeds 5μm, it will lead to a significant increase in system wavefront aberrations, specifically manifested as broadening of the point spread function (PSF), decreased modulation contrast, and abnormal higher-order aberration coefficients, ultimately causing systemic defects in the image such as defocus blur, geometric distortion, and degraded signal-to-noise ratio.

[0004] Chinese utility model patent CN222866970U discloses a lens alignment machine capable of multi-angle curing. The technical solution is as follows: the bottom of the alignment machine frame is connected to a chassis; the chassis is connected to an alignment pneumatic device; the alignment pneumatic device is connected to an alignment lifting plate; the alignment lifting plate is connected to an X / Y worktable; the X / Y worktable is connected to a lens alignment device; the autocollimator lens is connected to a support frame; the support frame is connected to a left slide rail and a right slide rail respectively; and the left and right slide rails are fixedly connected to the alignment machine frame. This machine breaks away from the limitations of previous alignment machines that only allowed for single-plane angle UV curing, and solves the problems of small space in the lens barrel structure, light obstruction due to structural design, and incomplete UV curing.

[0005] However, industrial-scale verification revealed that the device has significant drawbacks: its single-station operation mode leads to low equipment efficiency. In the process cycle of feeding, core adjustment, curing, and unloading, the proportion of material transfer time increases, resulting in non-value-added time loss in the production cycle, which seriously restricts the efficiency of capacity ramp-up and makes it difficult to meet the needs of large-scale intelligent manufacturing of modern optical devices. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a lens imaging end alignment device, which helps to reduce time loss and improve work efficiency.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] A lens imaging end alignment device includes a cast base, on which at least two independently movable clamping alignment modules are slidably disposed; and a first precision ball screw transmission mechanism mechanically coupled to the clamping alignment modules for driving the clamping alignment modules to move in the X-axis.

[0009] The clamping and adjusting module includes a base plate on which a six-degree-of-freedom fine-tuning platform is mounted, and a vacuum adsorption type mirror holder is mounted on its bearing surface; a laser collimator optically coupled to the fine-tuning platform, the laser collimator being fixed to the reference end of the casting base via a first column; and a UV-curing dispensing integrated unit mounted on a second column, the UV-curing dispensing integrated unit including a precision dispensing valve for Z-axis positioning via a second ball screw transmission mechanism and a UV-LED array curing unit;

[0010] After the laser collimator completes the optical axis calibration, the first ball screw transmission mechanism moves the lens under test to the UV curing dispensing integrated unit to perform the bonding and curing process.

[0011] Furthermore, a third ball screw transmission mechanism is provided on the second column, and the drive end of the third ball screw transmission mechanism is equipped with a CMOS vision inspection module, which includes an industrial camera and a coaxial lighting source.

[0012] Furthermore, the casting base is built into the chassis, which is a double-layer stainless steel plate welded structure with an electromagnetic shielding layer on the inner wall.

[0013] Furthermore, the chassis is equipped with a support rod, and an operating device is connected to the support rod.

[0014] Furthermore, the bottom of the chassis is equipped with height-adjustable support feet, and casters are provided next to the height-adjustable support feet.

[0015] Furthermore, the vacuum adsorption mirror holder has annularly distributed micro-pressure chambers embedded inside, and each chamber is connected to a vacuum pump assembly through an independent air path.

[0016] Furthermore, the chassis is hinged to an openable door, which has an observation window made of optical-grade acrylic sheet.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention can load multiple lenses at once, and complete the alignment, dispensing, and curing processes sequentially through the first ball screw transmission mechanism before unloading them uniformly, avoiding the waiting time for individual lens operations; or, while one lens alignment module is being aligned, other lens alignment modules can be loaded or unloaded. This unified centralized or staggered processing method greatly reduces time loss and improves work efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and, together with the embodiments of the present invention, are used to explain the present invention. They do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the lens imaging end alignment device;

[0021] Figure 2 This is a structural schematic diagram of the first column, the second column, and the components on them;

[0022] Figure 3 This is a structural diagram of the casting base and the clamping and adjusting module;

[0023] Figure 4 This is a schematic diagram of the structure of the clamping and adjusting module;

[0024] Figure 5 This is a schematic diagram of the lens imaging end alignment device mounted on the chassis.

[0025] In the picture:

[0026] 1. Casting base; 2. Clamping and adjusting module; 201. Base plate; 202. Six-degree-of-freedom fine-tuning platform; 203. Vacuum adsorption type mirror mount fixture; 3. First precision ball screw transmission mechanism; 4. Laser collimator; 5. First column; 6. Second column; 7. UV curing dispensing integrated unit; 701. Second ball screw transmission mechanism; 702. Precision dispensing valve; 703. UV-LED array curing unit; 8. Third ball screw transmission mechanism; 9. CMOS vision inspection module; 10. Chassis; 11. Support rod; 12. Operating equipment; 13. Height-adjustable support feet; 14. Casters; 15. Door; 1501. Observation window. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] like Figures 1 to 5As shown, this utility model claims protection for a lens imaging end alignment device, including a cast base 1, on which at least two independently movable clamping alignment modules 2 are slidably disposed; a first precision ball screw transmission mechanism 3 is mechanically coupled to the clamping alignment modules 2 for driving the clamping alignment modules 2 to move in the X-axis; the first precision ball screw transmission mechanism 3 is prior art, and the precision ball screw transmission mechanism includes a screw and a nut. When the screw rotates as the driving member, the nut will move linearly along the axis of the screw; in this embodiment, the clamping alignment modules 2 are fixed on the component connected to the nut, so the rotation of the screw can ultimately drive the clamping alignment modules 2 to move.

[0029] The clamping and adjusting module 2 includes a base plate 201, which is connected to the aforementioned nut or a component connected to the nut. A six-degree-of-freedom fine-tuning platform 202 is provided on the base plate 201. The six degrees of freedom of the six-degree-of-freedom fine-tuning platform 202 are linear movement along the X-axis, Y-axis, and Z-axis, and rotational movement around the X-axis, Y-axis, and Z-axis. The six-degree-of-freedom fine-tuning platform 202 is existing technology and has wide applications in many fields. In optical experiments, it is necessary to make precise adjustments to the position and angle of optical elements to achieve accurate focusing and propagation of light. In the field of precision machining, it is used for high-precision positioning and attitude adjustment of workpieces to ensure machining accuracy. This is existing technology and will not be elaborated here. The six-degree-of-freedom fine-tuning platform 202 has a vacuum adsorption lens holder 203 on its bearing surface for holding the lens. The vacuum adsorption lens holder 203 has annularly distributed micro-pressure chambers embedded inside. The annularly distributed micro-pressure chambers help to adsorb the periphery of the lens and improve the holding effect. Each chamber is connected to a vacuum pump group through an independent air path. The vacuum pump group works to generate adsorption force.

[0030] It also includes a laser collimator 4 optically coupled to the fine-tuning platform. The laser collimator 4 is fixed to the reference end of the casting base 1 via a first column 5. The clamping and alignment module 2 clamps the lens to the lower end of the laser collimator 4 for testing. The laser collimator 4 emits a reference laser, which enters the lens group of the lens and is reflected. The transmission information of the lens is analyzed based on the reflection. The reference laser is coaxial with the reference optical axis, and the lens to be aligned is operated accordingly. The above describes the alignment work in conjunction with the laser collimator 4, which is existing technology and will not be elaborated here.

[0031] It also includes a UV-curing dispensing integrated unit 7 installed on the second column 6. The UV-curing dispensing integrated unit 7 includes a precision dispensing valve 702 and a UV-LED area array curing unit 703, which are positioned on the Z-axis by a second ball screw transmission mechanism 701. The precision dispensing valve 702 and the UV-LED area array curing unit 703 are connected to the nut component of the second ball screw transmission mechanism 701 and are driven to rise and fall by the second ball screw transmission mechanism 701 to control the distance between the precision dispensing valve 702 and the UV-LED area array curing unit 703 and the lens, so as to realize the dispensing and curing work.

[0032] After the laser collimator 4 completes the optical axis calibration, the first ball screw transmission mechanism moves the lens under test to the UV curing dispensing integrated unit 7 to perform the bonding and curing process. In this embodiment, since at least two independently movable clamping and adjusting modules 2 are provided, all clamping and adjusting modules 2 can clamp and fix the lens at once (i.e., all are loaded at once). Then, the first ball screw transmission mechanism drives different clamping and adjusting modules 2 to complete the adjusting, dispensing, and curing in sequence, and then unloads the lens uniformly. Alternatively, a robot arm can be configured so that while one clamping and adjusting module 2 is adjusting, the robot arm can perform loading or unloading operations on the lens in the other clamping and adjusting module 2. That is, by using this unified centralized processing or staggered processing method, the time loss can be reduced and the work efficiency can be improved.

[0033] The second column 6 is equipped with a third ball screw transmission mechanism 8. The drive end of the third ball screw transmission mechanism 8 is equipped with a CMOS vision inspection module 9. The CMOS vision inspection module 9 includes an industrial camera and a coaxial lighting source. After the vacuum adsorption lens mount clamp 203 holding the alignment module 2 initially clamps the lens, it can be moved to the bottom of the CMOS vision inspection module 9 to take a picture. The picture image can be transmitted to the background and compared with the standard clamping image to see if the clamping is in place.

[0034] like Figure 5 As shown, the casting base 1 is built into the chassis 10. The chassis 10 adopts a double-layer stainless steel plate welded structure, which is structurally stable. The inner wall of the chassis 10 is covered with an electromagnetic shielding layer. The electromagnetic shielding layer can be an epoxy resin coating containing silver / copper / nickel particles, which is sprayed onto the inner wall. The electromagnetic shielding layer has the function of resisting electromagnetic interference.

[0035] A support rod 11 is provided on the chassis 10, and an operating device 12 is connected to the support rod 11. In this embodiment, the operating device 12 is a computer. The operating device 12 is electrically connected to the internal clamping and adjusting module 2 and the ultraviolet curing dispensing integrated unit 7, which facilitates operation by the operator.

[0036] The bottom of the chassis 10 is provided with a height-adjustable support foot 13, and a caster wheel 14 is provided next to the height-adjustable support foot 13; the caster wheel 14 facilitates the movement of the chassis 10; when moving, the height-adjustable support foot 13 is raised off the ground, and when the position is reached, the height-adjustable support foot 13 is lowered to contact the ground.

[0037] The chassis 10 is hinged to an openable door 15, which facilitates operation inside. The door 15 is equipped with an observation window 1501 made of optical grade acrylic sheet, which allows operators to observe the internal situation through the observation window 1501. Furthermore, the acrylic sheet is not easily broken and thus does not cause damage.

[0038] This utility model's lens imaging end alignment device is based on a cast base 1, on which at least two independently movable clamping alignment modules 2 are mounted. A first precision ball screw transmission mechanism 3 drives the clamping alignment module 2 to move along the X-axis. In this mechanism, the rotation of the screw causes the nut to move linearly, driving the clamping alignment module 2 connected to it. The base plate 201 of the clamping alignment module 2 has a six-degree-of-freedom fine-tuning platform 202. The vacuum adsorption lens mount clamp 203 on its bearing surface uses a vacuum pump group to generate adsorption force to clamp the lens. After the lens is aligned, it is then glued and cured in the UV curing dispensing integrated unit 7. This design can load multiple lenses at once, and the first ball screw transmission mechanism sequentially completes alignment, dispensing, and curing before unloading them uniformly, avoiding the waiting time for individual lens operations. Alternatively, a robotic arm can be configured to load or unload other clamping alignment modules 2 while one clamping alignment module 2 is being aligned. This unified centralized or staggered processing method greatly reduces time loss and improves work efficiency.

[0039] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens imaging end alignment device, characterized in that, It includes a casting base, on which at least two independently movable clamping and self-aligning modules are slidably disposed; and a first precision ball screw transmission mechanism mechanically coupled to the clamping and self-aligning modules for driving the clamping and self-aligning modules to move in the X-axis. The clamping and adjusting module includes a base plate on which a six-degree-of-freedom fine-tuning platform is mounted, and a vacuum adsorption lens mount clamp is provided on its bearing surface; a laser collimator optically coupled to the fine-tuning platform, the laser collimator being fixed to the reference end of the casting base via a first column; and an ultraviolet curing dispensing integrated unit mounted on a second column, the ultraviolet curing dispensing integrated unit including a precision dispensing valve for Z-axis positioning via a second ball screw transmission mechanism and a UV-LED array curing device; after the laser collimator completes optical axis calibration, the first ball screw transmission mechanism moves the lens under test to the ultraviolet curing dispensing integrated unit to perform the bonding and curing process.

2. The lens imaging end alignment device according to claim 1, characterized in that, The second column is equipped with a third ball screw transmission mechanism. The drive end of the third ball screw transmission mechanism is equipped with a CMOS vision inspection module, which includes an industrial camera and a coaxial lighting source.

3. The lens imaging end alignment device according to claim 1, characterized in that, The casting base is built into the chassis, which is a double-layer stainless steel plate welded structure with an electromagnetic shielding layer on the inner wall.

4. The lens imaging end alignment device according to claim 3, characterized in that, The chassis is equipped with a support rod, and the operating equipment is connected to the support rod.

5. The lens imaging end alignment device according to claim 3 or 4, characterized in that, The bottom of the chassis is equipped with height-adjustable support feet, and casters are provided next to the height-adjustable support feet.

6. The lens imaging end alignment device according to claim 1, characterized in that, The vacuum adsorption mirror holder has annularly distributed micro-pressure chambers embedded inside, and each chamber is connected to a vacuum pump assembly through an independent gas path.

7. The lens imaging end alignment device according to claim 4, characterized in that, The chassis is hinged to an openable door, which has an observation window made of optical-grade acrylic sheet.

Images